diff --git a/.gitignore b/.gitignore index 8bf420994..545c28726 100644 --- a/.gitignore +++ b/.gitignore @@ -45,6 +45,7 @@ models-mnt /infill /libllama.so /llama-bench +/llava /main /metal /perplexity @@ -56,6 +57,7 @@ models-mnt /server /simple /batched +/batched-bench /export-lora /finetune /speculative diff --git a/CMakeLists.txt b/CMakeLists.txt index 9184eda8f..6af42a6c2 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -422,8 +422,7 @@ endif() if (LLAMA_ALL_WARNINGS) if (NOT MSVC) set(warning_flags -Wall -Wextra -Wpedantic -Wcast-qual -Wno-unused-function) - set(c_flags -Wshadow -Wstrict-prototypes -Wpointer-arith -Wmissing-prototypes -Werror=implicit-int - -Werror=implicit-function-declaration) + set(c_flags -Wshadow -Wstrict-prototypes -Wpointer-arith -Wmissing-prototypes -Werror=implicit-int -Werror=implicit-function-declaration) set(cxx_flags -Wmissing-declarations -Wmissing-noreturn) set(host_cxx_flags "") @@ -455,7 +454,8 @@ if (LLAMA_ALL_WARNINGS) set(c_flags ${c_flags} ${warning_flags}) set(cxx_flags ${cxx_flags} ${warning_flags}) add_compile_options("$<$:${c_flags}>" - "$<$:${cxx_flags} ${host_cxx_flags}>") + "$<$:${cxx_flags}>" + "$<$:${host_cxx_flags}>") endif() diff --git a/Makefile b/Makefile index 87e7bb604..9a8faef45 100644 --- a/Makefile +++ b/Makefile @@ -1,8 +1,14 @@ # Define the default target now so that it is always the first target -BUILD_TARGETS = main quantize quantize-stats perplexity embedding vdot q8dot train-text-from-scratch convert-llama2c-to-ggml simple batched save-load-state server embd-input-test gguf llama-bench baby-llama beam-search speculative infill benchmark-matmult parallel finetune export-lora tests/test-c.o +BUILD_TARGETS = \ + main quantize quantize-stats perplexity embedding vdot q8dot train-text-from-scratch convert-llama2c-to-ggml \ + simple batched batched-bench save-load-state server embd-input-test gguf llama-bench llava baby-llama beam-search \ + speculative infill benchmark-matmult parallel finetune export-lora tests/test-c.o # Binaries only useful for tests -TEST_TARGETS = tests/test-llama-grammar tests/test-grammar-parser tests/test-double-float tests/test-grad0 tests/test-opt tests/test-quantize-fns tests/test-quantize-perf tests/test-sampling tests/test-tokenizer-0-llama tests/test-tokenizer-0-falcon tests/test-tokenizer-1-llama tests/test-tokenizer-1-bpe +TEST_TARGETS = \ + tests/test-llama-grammar tests/test-grammar-parser tests/test-double-float tests/test-grad0 tests/test-opt \ + tests/test-quantize-fns tests/test-quantize-perf tests/test-sampling tests/test-tokenizer-0-llama \ + tests/test-tokenizer-0-falcon tests/test-tokenizer-1-llama tests/test-tokenizer-1-bpe # Code coverage output files COV_TARGETS = *.gcno tests/*.gcno *.gcda tests/*.gcda *.gcov tests/*.gcov lcov-report gcovr-report @@ -172,6 +178,24 @@ else MK_CPPFLAGS += -DNDEBUG endif +ifdef LLAMA_SANITIZE_THREAD + MK_CFLAGS += -fsanitize=thread -g + MK_CXXFLAGS += -fsanitize=thread -g + MK_LDFLAGS += -fsanitize=thread -g +endif + +ifdef LLAMA_SANITIZE_ADDRESS + MK_CFLAGS += -fsanitize=address -fno-omit-frame-pointer -g + MK_CXXFLAGS += -fsanitize=address -fno-omit-frame-pointer -g + MK_LDFLAGS += -fsanitize=address -fno-omit-frame-pointer -g +endif + +ifdef LLAMA_SANITIZE_UNDEFINED + MK_CFLAGS += -fsanitize=undefined -g + MK_CXXFLAGS += -fsanitize=undefined -g + MK_LDFLAGS += -fsanitize=undefined -g +endif + ifdef LLAMA_SERVER_VERBOSE MK_CPPFLAGS += -DSERVER_VERBOSE=$(LLAMA_SERVER_VERBOSE) endif @@ -520,7 +544,13 @@ OBJS += ggml-alloc.o ggml-backend.o llama.o: llama.cpp ggml.h ggml-alloc.h ggml-backend.h ggml-cuda.h ggml-metal.h llama.h $(CXX) $(CXXFLAGS) -c $< -o $@ -common.o: common/common.cpp common/common.h build-info.h common/log.h +COMMON_H_DEPS = common/common.h common/sampling.h build-info.h common/log.h +COMMON_DEPS = $(COMMON_H_DEPS) common.o sampling.o + +common.o: common/common.cpp $(COMMON_H_DEPS) + $(CXX) $(CXXFLAGS) -c $< -o $@ + +sampling.o: common/sampling.cpp $(COMMON_H_DEPS) $(CXX) $(CXXFLAGS) -c $< -o $@ console.o: common/console.cpp common/console.h @@ -542,19 +572,22 @@ clean: # Examples # -main: examples/main/main.cpp build-info.h ggml.o llama.o common.o console.o grammar-parser.o $(OBJS) +main: examples/main/main.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) console.o grammar-parser.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) @echo @echo '==== Run ./main -h for help. ====' @echo -infill: examples/infill/infill.cpp build-info.h ggml.o llama.o common.o console.o grammar-parser.o $(OBJS) +infill: examples/infill/infill.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) console.o grammar-parser.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -simple: examples/simple/simple.cpp build-info.h ggml.o llama.o common.o $(OBJS) +simple: examples/simple/simple.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -batched: examples/batched/batched.cpp build-info.h ggml.o llama.o common.o $(OBJS) +batched: examples/batched/batched.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) + $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) + +batched-bench: examples/batched-bench/batched-bench.cpp build-info.h ggml.o llama.o common.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) quantize: examples/quantize/quantize.cpp build-info.h ggml.o llama.o $(OBJS) @@ -563,53 +596,56 @@ quantize: examples/quantize/quantize.cpp build-info.h ggml. quantize-stats: examples/quantize-stats/quantize-stats.cpp build-info.h ggml.o llama.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -perplexity: examples/perplexity/perplexity.cpp build-info.h ggml.o llama.o common.o $(OBJS) +perplexity: examples/perplexity/perplexity.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -embedding: examples/embedding/embedding.cpp build-info.h ggml.o llama.o common.o $(OBJS) +embedding: examples/embedding/embedding.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -save-load-state: examples/save-load-state/save-load-state.cpp build-info.h ggml.o llama.o common.o $(OBJS) +save-load-state: examples/save-load-state/save-load-state.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -server: examples/server/server.cpp examples/server/httplib.h examples/server/json.hpp examples/server/index.html.hpp examples/server/index.js.hpp examples/server/completion.js.hpp build-info.h ggml.o llama.o common.o grammar-parser.o $(OBJS) +server: examples/server/server.cpp examples/server/httplib.h examples/server/json.hpp examples/server/index.html.hpp examples/server/index.js.hpp examples/server/completion.js.hpp build-info.h ggml.o llama.o $(COMMON_DEPS) grammar-parser.o $(OBJS) $(CXX) $(CXXFLAGS) -Iexamples/server $(filter-out %.h,$(filter-out %.hpp,$^)) -o $@ $(LDFLAGS) $(LWINSOCK2) -$(LIB_PRE)embdinput$(DSO_EXT): examples/embd-input/embd-input.h examples/embd-input/embd-input-lib.cpp build-info.h ggml.o llama.o common.o $(OBJS) +$(LIB_PRE)embdinput$(DSO_EXT): examples/embd-input/embd-input.h examples/embd-input/embd-input-lib.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) --shared $(CXXFLAGS) $(filter-out %.h,$(filter-out %.hpp,$^)) -o $@ $(LDFLAGS) -embd-input-test: $(LIB_PRE)embdinput$(DSO_EXT) examples/embd-input/embd-input-test.cpp build-info.h ggml.o llama.o common.o $(OBJS) +embd-input-test: $(LIB_PRE)embdinput$(DSO_EXT) examples/embd-input/embd-input-test.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %$(DSO_EXT),$(filter-out %.h,$(filter-out %.hpp,$^))) -o $@ $(LDFLAGS) -L. -lembdinput gguf: examples/gguf/gguf.cpp ggml.o llama.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -train-text-from-scratch: examples/train-text-from-scratch/train-text-from-scratch.cpp ggml.o llama.o common.o train.o $(OBJS) +train-text-from-scratch: examples/train-text-from-scratch/train-text-from-scratch.cpp ggml.o llama.o $(COMMON_DEPS) train.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) convert-llama2c-to-ggml: examples/convert-llama2c-to-ggml/convert-llama2c-to-ggml.cpp ggml.o llama.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -llama-bench: examples/llama-bench/llama-bench.cpp build-info.h ggml.o llama.o common.o $(OBJS) +llama-bench: examples/llama-bench/llama-bench.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -baby-llama: examples/baby-llama/baby-llama.cpp ggml.o llama.o common.o train.o $(OBJS) +llava: examples/llava/llava.cpp examples/llava/llava-utils.h examples/llava/clip.cpp examples/llava/clip.h common/stb_image.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) + $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -Wno-cast-qual + +baby-llama: examples/baby-llama/baby-llama.cpp ggml.o llama.o $(COMMON_DEPS) train.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -beam-search: examples/beam-search/beam-search.cpp build-info.h ggml.o llama.o common.o $(OBJS) +beam-search: examples/beam-search/beam-search.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -finetune: examples/finetune/finetune.cpp build-info.h ggml.o llama.o common.o train.o $(OBJS) +finetune: examples/finetune/finetune.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) train.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -export-lora: examples/export-lora/export-lora.cpp build-info.h ggml.o llama.o common.o $(OBJS) +export-lora: examples/export-lora/export-lora.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -speculative: examples/speculative/speculative.cpp build-info.h ggml.o llama.o common.o grammar-parser.o $(OBJS) +speculative: examples/speculative/speculative.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) grammar-parser.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -parallel: examples/parallel/parallel.cpp build-info.h ggml.o llama.o common.o $(OBJS) +parallel: examples/parallel/parallel.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) ifdef LLAMA_METAL @@ -650,40 +686,40 @@ vdot: pocs/vdot/vdot.cpp ggml.o $(OBJS) q8dot: pocs/vdot/q8dot.cpp ggml.o $(OBJS) $(CXX) $(CXXFLAGS) $^ -o $@ $(LDFLAGS) -tests/test-llama-grammar: tests/test-llama-grammar.cpp build-info.h ggml.o common.o grammar-parser.o $(OBJS) +tests/test-llama-grammar: tests/test-llama-grammar.cpp build-info.h ggml.o $(COMMON_DEPS) grammar-parser.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-grammar-parser: tests/test-grammar-parser.cpp build-info.h ggml.o llama.o common.o grammar-parser.o $(OBJS) +tests/test-grammar-parser: tests/test-grammar-parser.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) grammar-parser.o $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-double-float: tests/test-double-float.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-double-float: tests/test-double-float.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-grad0: tests/test-grad0.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-grad0: tests/test-grad0.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-opt: tests/test-opt.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-opt: tests/test-opt.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-quantize-fns: tests/test-quantize-fns.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-quantize-fns: tests/test-quantize-fns.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-quantize-perf: tests/test-quantize-perf.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-quantize-perf: tests/test-quantize-perf.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-sampling: tests/test-sampling.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-sampling: tests/test-sampling.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-tokenizer-0-falcon: tests/test-tokenizer-0-falcon.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-tokenizer-0-falcon: tests/test-tokenizer-0-falcon.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-tokenizer-0-llama: tests/test-tokenizer-0-llama.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-tokenizer-0-llama: tests/test-tokenizer-0-llama.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-tokenizer-1-bpe: tests/test-tokenizer-1-bpe.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-tokenizer-1-bpe: tests/test-tokenizer-1-bpe.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) -tests/test-tokenizer-1-llama: tests/test-tokenizer-1-llama.cpp build-info.h ggml.o llama.o common.o $(OBJS) +tests/test-tokenizer-1-llama: tests/test-tokenizer-1-llama.cpp build-info.h ggml.o llama.o $(COMMON_DEPS) $(OBJS) $(CXX) $(CXXFLAGS) $(filter-out %.h,$^) -o $@ $(LDFLAGS) tests/test-c.o: tests/test-c.c llama.h diff --git a/README.md b/README.md index 0f1fd7565..60f14a1fb 100644 --- a/README.md +++ b/README.md @@ -279,7 +279,7 @@ In order to build llama.cpp you have three different options. On MacOS, Metal is enabled by default. Using Metal makes the computation run on the GPU. To disable the Metal build at compile time use the `LLAMA_NO_METAL=1` flag or the `LLAMA_METAL=OFF` cmake option. -When built with Metal support, you can explicitly disable GPU inference with the `--gpu-layers|-ngl 0` command-line +When built with Metal support, you can explicitly disable GPU inference with the `--n-gpu-layers|-ngl 0` command-line argument. ### MPI Build diff --git a/build.zig b/build.zig index fdc5bc084..0b74cee48 100644 --- a/build.zig +++ b/build.zig @@ -128,17 +128,18 @@ pub fn build(b: *std.build.Builder) !void { const llama = make.obj("llama", "llama.cpp"); const common = make.obj("common", "common/common.cpp"); const console = make.obj("console", "common/console.cpp"); + const sampling = make.obj("sampling", "common/sampling.cpp"); const grammar_parser = make.obj("grammar-parser", "common/grammar-parser.cpp"); const train = make.obj("train", "common/train.cpp"); - _ = make.exe("main", "examples/main/main.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common, console, grammar_parser }); + _ = make.exe("main", "examples/main/main.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common, sampling, console, grammar_parser }); _ = make.exe("quantize", "examples/quantize/quantize.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common }); _ = make.exe("perplexity", "examples/perplexity/perplexity.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common }); _ = make.exe("embedding", "examples/embedding/embedding.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common }); _ = make.exe("finetune", "examples/finetune/finetune.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common, train }); _ = make.exe("train-text-from-scratch", "examples/train-text-from-scratch/train-text-from-scratch.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common, train }); - const server = make.exe("server", "examples/server/server.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common, grammar_parser }); + const server = make.exe("server", "examples/server/server.cpp", &.{ ggml, ggml_alloc, ggml_backend, llama, common, sampling, grammar_parser }); if (server.target.isWindows()) { server.linkSystemLibrary("ws2_32"); } diff --git a/ci/run.sh b/ci/run.sh index 942b2e00c..34c9129c1 100755 --- a/ci/run.sh +++ b/ci/run.sh @@ -496,10 +496,12 @@ test $ret -eq 0 && gg_run ctest_debug test $ret -eq 0 && gg_run ctest_release if [ -z ${GG_BUILD_LOW_PERF} ]; then - if [ -z ${GG_BUILD_CUDA} ]; then - test $ret -eq 0 && gg_run open_llama_3b_v2 - else - test $ret -eq 0 && gg_run open_llama_7b_v2 + if [ -z ${GG_BUILD_VRAM_GB} ] || [ ${GG_BUILD_VRAM_GB} -ge 8 ]; then + if [ -z ${GG_BUILD_CUDA} ]; then + test $ret -eq 0 && gg_run open_llama_3b_v2 + else + test $ret -eq 0 && gg_run open_llama_7b_v2 + fi fi fi diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt index 951aa8340..fbb0ff095 100644 --- a/common/CMakeLists.txt +++ b/common/CMakeLists.txt @@ -5,6 +5,8 @@ set(TARGET common) add_library(${TARGET} OBJECT common.h common.cpp + sampling.h + sampling.cpp console.h console.cpp grammar-parser.h diff --git a/common/common.cpp b/common/common.cpp index 0f55c33a7..9c4f7df20 100644 --- a/common/common.cpp +++ b/common/common.cpp @@ -107,6 +107,7 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { std::string arg; gpt_params default_params; const std::string arg_prefix = "--"; + llama_sampling_params & sparams = params.sampling_params; for (int i = 1; i < argc; i++) { arg = argv[i]; @@ -184,7 +185,7 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { invalid_param = true; break; } - params.top_k = std::stoi(argv[i]); + sparams.top_k = std::stoi(argv[i]); } else if (arg == "-c" || arg == "--ctx-size") { if (++i >= argc) { invalid_param = true; @@ -216,73 +217,73 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { invalid_param = true; break; } - params.top_p = std::stof(argv[i]); + sparams.top_p = std::stof(argv[i]); } else if (arg == "--temp") { if (++i >= argc) { invalid_param = true; break; } - params.temp = std::stof(argv[i]); + sparams.temp = std::stof(argv[i]); } else if (arg == "--tfs") { if (++i >= argc) { invalid_param = true; break; } - params.tfs_z = std::stof(argv[i]); + sparams.tfs_z = std::stof(argv[i]); } else if (arg == "--typical") { if (++i >= argc) { invalid_param = true; break; } - params.typical_p = std::stof(argv[i]); + sparams.typical_p = std::stof(argv[i]); } else if (arg == "--repeat-last-n") { if (++i >= argc) { invalid_param = true; break; } - params.repeat_last_n = std::stoi(argv[i]); + sparams.repeat_last_n = std::stoi(argv[i]); } else if (arg == "--repeat-penalty") { if (++i >= argc) { invalid_param = true; break; } - params.repeat_penalty = std::stof(argv[i]); + sparams.repeat_penalty = std::stof(argv[i]); } else if (arg == "--frequency-penalty") { if (++i >= argc) { invalid_param = true; break; } - params.frequency_penalty = std::stof(argv[i]); + sparams.frequency_penalty = std::stof(argv[i]); } else if (arg == "--presence-penalty") { if (++i >= argc) { invalid_param = true; break; } - params.presence_penalty = std::stof(argv[i]); + sparams.presence_penalty = std::stof(argv[i]); } else if (arg == "--mirostat") { if (++i >= argc) { invalid_param = true; break; } - params.mirostat = std::stoi(argv[i]); + sparams.mirostat = std::stoi(argv[i]); } else if (arg == "--mirostat-lr") { if (++i >= argc) { invalid_param = true; break; } - params.mirostat_eta = std::stof(argv[i]); + sparams.mirostat_eta = std::stof(argv[i]); } else if (arg == "--mirostat-ent") { if (++i >= argc) { invalid_param = true; break; } - params.mirostat_tau = std::stof(argv[i]); + sparams.mirostat_tau = std::stof(argv[i]); } else if (arg == "--cfg-negative-prompt") { if (++i >= argc) { invalid_param = true; break; } - params.cfg_negative_prompt = argv[i]; + sparams.cfg_negative_prompt = argv[i]; } else if (arg == "--cfg-negative-prompt-file") { if (++i >= argc) { invalid_param = true; @@ -294,16 +295,16 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { invalid_param = true; break; } - std::copy(std::istreambuf_iterator(file), std::istreambuf_iterator(), back_inserter(params.cfg_negative_prompt)); - if (!params.cfg_negative_prompt.empty() && params.cfg_negative_prompt.back() == '\n') { - params.cfg_negative_prompt.pop_back(); + std::copy(std::istreambuf_iterator(file), std::istreambuf_iterator(), back_inserter(sparams.cfg_negative_prompt)); + if (!sparams.cfg_negative_prompt.empty() && sparams.cfg_negative_prompt.back() == '\n') { + sparams.cfg_negative_prompt.pop_back(); } } else if (arg == "--cfg-scale") { if (++i >= argc) { invalid_param = true; break; } - params.cfg_scale = std::stof(argv[i]); + sparams.cfg_scale = std::stof(argv[i]); } else if (arg == "-b" || arg == "--batch-size") { if (++i >= argc) { invalid_param = true; @@ -383,6 +384,18 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { break; } params.lora_base = argv[i]; + } else if (arg == "--mmproj") { + if (++i >= argc) { + invalid_param = true; + break; + } + params.mmproj = argv[i]; + } else if (arg == "--image") { + if (++i >= argc) { + invalid_param = true; + break; + } + params.image = argv[i]; } else if (arg == "-i" || arg == "--interactive") { params.interactive = true; } else if (arg == "--embedding") { @@ -512,7 +525,7 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { } else if (arg == "--ignore-eos") { params.ignore_eos = true; } else if (arg == "--no-penalize-nl") { - params.penalize_nl = false; + sparams.penalize_nl = false; } else if (arg == "-l" || arg == "--logit-bias") { if (++i >= argc) { invalid_param = true; @@ -524,7 +537,7 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { std::string value_str; try { if (ss >> key && ss >> sign && std::getline(ss, value_str) && (sign == '+' || sign == '-')) { - params.logit_bias[key] = std::stof(value_str) * ((sign == '-') ? -1.0f : 1.0f); + sparams.logit_bias[key] = std::stof(value_str) * ((sign == '-') ? -1.0f : 1.0f); } else { throw std::exception(); } @@ -627,6 +640,8 @@ bool gpt_params_parse(int argc, char ** argv, gpt_params & params) { } void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) { + const llama_sampling_params & sparams = params.sampling_params; + printf("usage: %s [options]\n", argv[0]); printf("\n"); printf("options:\n"); @@ -659,19 +674,19 @@ void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) { printf(" -n N, --n-predict N number of tokens to predict (default: %d, -1 = infinity, -2 = until context filled)\n", params.n_predict); printf(" -c N, --ctx-size N size of the prompt context (default: %d, 0 = loaded from model)\n", params.n_ctx); printf(" -b N, --batch-size N batch size for prompt processing (default: %d)\n", params.n_batch); - printf(" --top-k N top-k sampling (default: %d, 0 = disabled)\n", params.top_k); - printf(" --top-p N top-p sampling (default: %.1f, 1.0 = disabled)\n", (double)params.top_p); - printf(" --tfs N tail free sampling, parameter z (default: %.1f, 1.0 = disabled)\n", (double)params.tfs_z); - printf(" --typical N locally typical sampling, parameter p (default: %.1f, 1.0 = disabled)\n", (double)params.typical_p); - printf(" --repeat-last-n N last n tokens to consider for penalize (default: %d, 0 = disabled, -1 = ctx_size)\n", params.repeat_last_n); - printf(" --repeat-penalty N penalize repeat sequence of tokens (default: %.1f, 1.0 = disabled)\n", (double)params.repeat_penalty); - printf(" --presence-penalty N repeat alpha presence penalty (default: %.1f, 0.0 = disabled)\n", (double)params.presence_penalty); - printf(" --frequency-penalty N repeat alpha frequency penalty (default: %.1f, 0.0 = disabled)\n", (double)params.frequency_penalty); + printf(" --top-k N top-k sampling (default: %d, 0 = disabled)\n", sparams.top_k); + printf(" --top-p N top-p sampling (default: %.1f, 1.0 = disabled)\n", (double)sparams.top_p); + printf(" --tfs N tail free sampling, parameter z (default: %.1f, 1.0 = disabled)\n", (double)sparams.tfs_z); + printf(" --typical N locally typical sampling, parameter p (default: %.1f, 1.0 = disabled)\n", (double)sparams.typical_p); + printf(" --repeat-last-n N last n tokens to consider for penalize (default: %d, 0 = disabled, -1 = ctx_size)\n", sparams.repeat_last_n); + printf(" --repeat-penalty N penalize repeat sequence of tokens (default: %.1f, 1.0 = disabled)\n", (double)sparams.repeat_penalty); + printf(" --presence-penalty N repeat alpha presence penalty (default: %.1f, 0.0 = disabled)\n", (double)sparams.presence_penalty); + printf(" --frequency-penalty N repeat alpha frequency penalty (default: %.1f, 0.0 = disabled)\n", (double)sparams.frequency_penalty); printf(" --mirostat N use Mirostat sampling.\n"); printf(" Top K, Nucleus, Tail Free and Locally Typical samplers are ignored if used.\n"); - printf(" (default: %d, 0 = disabled, 1 = Mirostat, 2 = Mirostat 2.0)\n", params.mirostat); - printf(" --mirostat-lr N Mirostat learning rate, parameter eta (default: %.1f)\n", (double)params.mirostat_eta); - printf(" --mirostat-ent N Mirostat target entropy, parameter tau (default: %.1f)\n", (double)params.mirostat_tau); + printf(" (default: %d, 0 = disabled, 1 = Mirostat, 2 = Mirostat 2.0)\n", sparams.mirostat); + printf(" --mirostat-lr N Mirostat learning rate, parameter eta (default: %.1f)\n", (double)sparams.mirostat_eta); + printf(" --mirostat-ent N Mirostat target entropy, parameter tau (default: %.1f)\n", (double)sparams.mirostat_tau); printf(" -l TOKEN_ID(+/-)BIAS, --logit-bias TOKEN_ID(+/-)BIAS\n"); printf(" modifies the likelihood of token appearing in the completion,\n"); printf(" i.e. `--logit-bias 15043+1` to increase likelihood of token ' Hello',\n"); @@ -682,7 +697,7 @@ void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) { printf(" negative prompt to use for guidance. (default: empty)\n"); printf(" --cfg-negative-prompt-file FNAME\n"); printf(" negative prompt file to use for guidance. (default: empty)\n"); - printf(" --cfg-scale N strength of guidance (default: %f, 1.0 = disable)\n", params.cfg_scale); + printf(" --cfg-scale N strength of guidance (default: %f, 1.0 = disable)\n", sparams.cfg_scale); printf(" --rope-scale N RoPE context linear scaling factor, inverse of --rope-freq-scale\n"); printf(" --rope-freq-base N RoPE base frequency, used by NTK-aware scaling (default: loaded from model)\n"); printf(" --rope-freq-scale N RoPE frequency linear scaling factor (default: loaded from model)\n"); @@ -690,7 +705,7 @@ void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) { printf(" --no-penalize-nl do not penalize newline token\n"); printf(" --memory-f32 use f32 instead of f16 for memory key+value (default: disabled)\n"); printf(" not recommended: doubles context memory required and no measurable increase in quality\n"); - printf(" --temp N temperature (default: %.1f)\n", (double)params.temp); + printf(" --temp N temperature (default: %.1f)\n", (double)sparams.temp); printf(" --logits-all return logits for all tokens in the batch (default: disabled)\n"); printf(" --hellaswag compute HellaSwag score over random tasks from datafile supplied with -f\n"); printf(" --hellaswag-tasks N number of tasks to use when computing the HellaSwag score (default: %zu)\n", params.hellaswag_tasks); @@ -700,6 +715,8 @@ void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) { printf(" -np N, --parallel N number of parallel sequences to decode (default: %d)\n", params.n_parallel); printf(" -ns N, --sequences N number of sequences to decode (default: %d)\n", params.n_sequences); printf(" -cb, --cont-batching enable continuous batching (a.k.a dynamic batching) (default: disabled)\n"); + printf(" --mmproj MMPROJ_FILE path to a multimodal projector file for LLaVA. see examples/llava/README.md\n"); + printf(" --image IMAGE_FILE path to an image file. use with multimodal models\n"); if (llama_mlock_supported()) { printf(" --mlock force system to keep model in RAM rather than swapping or compressing\n"); } @@ -840,7 +857,7 @@ std::tuple llama_init_from_gpt_par } if (params.ignore_eos) { - params.logit_bias[llama_token_eos(lctx)] = -INFINITY; + params.sampling_params.logit_bias[llama_token_eos(lctx)] = -INFINITY; } { @@ -932,127 +949,6 @@ std::string llama_detokenize_bpe(llama_context * ctx, const std::vector & last_tokens, - std::vector & candidates, - int idx) { - const int n_ctx = llama_n_ctx(ctx); - const int n_vocab = llama_n_vocab(llama_get_model(ctx)); - - const float temp = params.temp; - const int32_t top_k = params.top_k <= 0 ? n_vocab : params.top_k; - const float top_p = params.top_p; - const float tfs_z = params.tfs_z; - const float typical_p = params.typical_p; - const int32_t repeat_last_n = params.repeat_last_n < 0 ? n_ctx : params.repeat_last_n; - const float repeat_penalty = params.repeat_penalty; - const float alpha_presence = params.presence_penalty; - const float alpha_frequency = params.frequency_penalty; - const int mirostat = params.mirostat; - const float mirostat_tau = params.mirostat_tau; - const float mirostat_eta = params.mirostat_eta; - const bool penalize_nl = params.penalize_nl; - - llama_token id = 0; - - float * logits = llama_get_logits_ith(ctx, idx); - - // Apply params.logit_bias map - for (auto it = params.logit_bias.begin(); it != params.logit_bias.end(); it++) { - logits[it->first] += it->second; - } - - candidates.clear(); - for (llama_token token_id = 0; token_id < n_vocab; token_id++) { - candidates.emplace_back(llama_token_data{token_id, logits[token_id], 0.0f}); - } - - llama_token_data_array cur_p = { candidates.data(), candidates.size(), false }; - - if (ctx_guidance) { - llama_sample_classifier_free_guidance(ctx, &cur_p, ctx_guidance, params.cfg_scale); - } - - // apply penalties - if (!last_tokens.empty()) { - const float nl_logit = logits[llama_token_nl(ctx)]; - const int last_n_repeat = std::min(std::min((int)last_tokens.size(), repeat_last_n), n_ctx); - - llama_sample_repetition_penalty(ctx, &cur_p, - last_tokens.data() + last_tokens.size() - last_n_repeat, - last_n_repeat, repeat_penalty); - llama_sample_frequency_and_presence_penalties(ctx, &cur_p, - last_tokens.data() + last_tokens.size() - last_n_repeat, - last_n_repeat, alpha_frequency, alpha_presence); - - if (!penalize_nl) { - for (size_t idx = 0; idx < cur_p.size; idx++) { - if (cur_p.data[idx].id == llama_token_nl(ctx)) { - cur_p.data[idx].logit = nl_logit; - break; - } - } - } - } - - if (grammar != NULL) { - llama_sample_grammar(ctx, &cur_p, grammar); - } - - if (temp <= 0) { - // Greedy sampling - id = llama_sample_token_greedy(ctx, &cur_p); - } else { - if (mirostat == 1) { - static float mirostat_mu = 2.0f * mirostat_tau; - const int mirostat_m = 100; - llama_sample_temp(ctx, &cur_p, temp); - id = llama_sample_token_mirostat(ctx, &cur_p, mirostat_tau, mirostat_eta, mirostat_m, &mirostat_mu); - } else if (mirostat == 2) { - static float mirostat_mu = 2.0f * mirostat_tau; - llama_sample_temp(ctx, &cur_p, temp); - id = llama_sample_token_mirostat_v2(ctx, &cur_p, mirostat_tau, mirostat_eta, &mirostat_mu); - } else { - // Temperature sampling - size_t min_keep = std::max(1, params.n_probs); - llama_sample_top_k (ctx, &cur_p, top_k, min_keep); - llama_sample_tail_free (ctx, &cur_p, tfs_z, min_keep); - llama_sample_typical (ctx, &cur_p, typical_p, min_keep); - llama_sample_top_p (ctx, &cur_p, top_p, min_keep); - llama_sample_temp(ctx, &cur_p, temp); - - { - const int n_top = 10; - LOG("top %d candidates:\n", n_top); - - for (int i = 0; i < n_top; i++) { - const llama_token id = cur_p.data[i].id; - LOG(" - %5d: '%12s' (%.3f)\n", id, llama_token_to_piece(ctx, id).c_str(), cur_p.data[i].p); - } - } - - id = llama_sample_token(ctx, &cur_p); - - LOG("sampled token: %5d: '%s'\n", id, llama_token_to_piece(ctx, id).c_str()); - } - } - // printf("`%d`", candidates_p.size); - - if (grammar != NULL) { - llama_grammar_accept_token(ctx, grammar, id); - } - - return id; -} - // // YAML utils // @@ -1204,6 +1100,8 @@ std::string get_sortable_timestamp() { void dump_non_result_info_yaml(FILE * stream, const gpt_params & params, const llama_context * lctx, const std::string & timestamp, const std::vector & prompt_tokens, const char * model_desc) { + const llama_sampling_params & sparams = params.sampling_params; + fprintf(stream, "build_commit: %s\n", BUILD_COMMIT); fprintf(stream, "build_number: %d\n", BUILD_NUMBER); fprintf(stream, "cpu_has_arm_fma: %s\n", ggml_cpu_has_arm_fma() ? "true" : "false"); @@ -1250,21 +1148,21 @@ void dump_non_result_info_yaml(FILE * stream, const gpt_params & params, const l fprintf(stream, "alias: %s # default: unknown\n", params.model_alias.c_str()); fprintf(stream, "batch_size: %d # default: 512\n", params.n_batch); - dump_string_yaml_multiline(stream, "cfg_negative_prompt", params.cfg_negative_prompt.c_str()); - fprintf(stream, "cfg_scale: %f # default: 1.0\n", params.cfg_scale); + dump_string_yaml_multiline(stream, "cfg_negative_prompt", sparams.cfg_negative_prompt.c_str()); + fprintf(stream, "cfg_scale: %f # default: 1.0\n", sparams.cfg_scale); fprintf(stream, "chunks: %d # default: -1 (unlimited)\n", params.n_chunks); fprintf(stream, "color: %s # default: false\n", params.use_color ? "true" : "false"); fprintf(stream, "ctx_size: %d # default: 512\n", params.n_ctx); fprintf(stream, "escape: %s # default: false\n", params.escape ? "true" : "false"); fprintf(stream, "file: # never logged, see prompt instead. Can still be specified for input.\n"); - fprintf(stream, "frequency_penalty: %f # default: 0.0 \n", params.frequency_penalty); + fprintf(stream, "frequency_penalty: %f # default: 0.0 \n", sparams.frequency_penalty); dump_string_yaml_multiline(stream, "grammar", params.grammar.c_str()); fprintf(stream, "grammar-file: # never logged, see grammar instead. Can still be specified for input.\n"); fprintf(stream, "hellaswag: %s # default: false\n", params.hellaswag ? "true" : "false"); fprintf(stream, "hellaswag_tasks: %zu # default: 400\n", params.hellaswag_tasks); - const auto logit_bias_eos = params.logit_bias.find(llama_token_eos(lctx)); - const bool ignore_eos = logit_bias_eos != params.logit_bias.end() && logit_bias_eos->second == -INFINITY; + const auto logit_bias_eos = sparams.logit_bias.find(llama_token_eos(lctx)); + const bool ignore_eos = logit_bias_eos != sparams.logit_bias.end() && logit_bias_eos->second == -INFINITY; fprintf(stream, "ignore_eos: %s # default: false\n", ignore_eos ? "true" : "false"); dump_string_yaml_multiline(stream, "in_prefix", params.input_prefix.c_str()); @@ -1277,7 +1175,7 @@ void dump_non_result_info_yaml(FILE * stream, const gpt_params & params, const l fprintf(stream, "logdir: %s # default: unset (no logging)\n", params.logdir.c_str()); fprintf(stream, "logit_bias:\n"); - for (std::pair lb : params.logit_bias) { + for (std::pair lb : sparams.logit_bias) { if (ignore_eos && lb.first == logit_bias_eos->first) { continue; } @@ -1301,30 +1199,30 @@ void dump_non_result_info_yaml(FILE * stream, const gpt_params & params, const l fprintf(stream, "lora_base: %s\n", params.lora_base.c_str()); fprintf(stream, "main_gpu: %d # default: 0\n", params.main_gpu); fprintf(stream, "memory_f32: %s # default: false\n", !params.memory_f16 ? "true" : "false"); - fprintf(stream, "mirostat: %d # default: 0 (disabled)\n", params.mirostat); - fprintf(stream, "mirostat_ent: %f # default: 5.0\n", params.mirostat_tau); - fprintf(stream, "mirostat_lr: %f # default: 0.1\n", params.mirostat_eta); + fprintf(stream, "mirostat: %d # default: 0 (disabled)\n", sparams.mirostat); + fprintf(stream, "mirostat_ent: %f # default: 5.0\n", sparams.mirostat_tau); + fprintf(stream, "mirostat_lr: %f # default: 0.1\n", sparams.mirostat_eta); fprintf(stream, "mlock: %s # default: false\n", params.use_mlock ? "true" : "false"); fprintf(stream, "model: %s # default: models/7B/ggml-model.bin\n", params.model.c_str()); fprintf(stream, "model_draft: %s # default:\n", params.model_draft.c_str()); fprintf(stream, "multiline_input: %s # default: false\n", params.multiline_input ? "true" : "false"); fprintf(stream, "n_gpu_layers: %d # default: -1\n", params.n_gpu_layers); fprintf(stream, "n_predict: %d # default: -1 (unlimited)\n", params.n_predict); - fprintf(stream, "n_probs: %d # only used by server binary, default: 0\n", params.n_probs); + fprintf(stream, "n_probs: %d # only used by server binary, default: 0\n", sparams.n_probs); fprintf(stream, "no_mmap: %s # default: false\n", !params.use_mmap ? "true" : "false"); fprintf(stream, "no_mul_mat_q: %s # default: false\n", !params.mul_mat_q ? "true" : "false"); - fprintf(stream, "no_penalize_nl: %s # default: false\n", !params.penalize_nl ? "true" : "false"); + fprintf(stream, "no_penalize_nl: %s # default: false\n", !sparams.penalize_nl ? "true" : "false"); fprintf(stream, "numa: %s # default: false\n", params.numa ? "true" : "false"); fprintf(stream, "ppl_output_type: %d # default: 0\n", params.ppl_output_type); fprintf(stream, "ppl_stride: %d # default: 0\n", params.ppl_stride); - fprintf(stream, "presence_penalty: %f # default: 0.0\n", params.presence_penalty); + fprintf(stream, "presence_penalty: %f # default: 0.0\n", sparams.presence_penalty); dump_string_yaml_multiline(stream, "prompt", params.prompt.c_str()); fprintf(stream, "prompt_cache: %s\n", params.path_prompt_cache.c_str()); fprintf(stream, "prompt_cache_all: %s # default: false\n", params.prompt_cache_all ? "true" : "false"); fprintf(stream, "prompt_cache_ro: %s # default: false\n", params.prompt_cache_ro ? "true" : "false"); dump_vector_int_yaml(stream, "prompt_tokens", prompt_tokens); fprintf(stream, "random_prompt: %s # default: false\n", params.random_prompt ? "true" : "false"); - fprintf(stream, "repeat_penalty: %f # default: 1.1\n", params.repeat_penalty); + fprintf(stream, "repeat_penalty: %f # default: 1.1\n", sparams.repeat_penalty); fprintf(stream, "reverse_prompt:\n"); for (std::string ap : params.antiprompt) { @@ -1342,15 +1240,15 @@ void dump_non_result_info_yaml(FILE * stream, const gpt_params & params, const l fprintf(stream, "seed: %d # default: -1 (random seed)\n", params.seed); fprintf(stream, "simple_io: %s # default: false\n", params.simple_io ? "true" : "false"); fprintf(stream, "cont_batching: %s # default: false\n", params.cont_batching ? "true" : "false"); - fprintf(stream, "temp: %f # default: 0.8\n", params.temp); + fprintf(stream, "temp: %f # default: 0.8\n", sparams.temp); const std::vector tensor_split_vector(params.tensor_split, params.tensor_split + LLAMA_MAX_DEVICES); dump_vector_float_yaml(stream, "tensor_split", tensor_split_vector); - fprintf(stream, "tfs: %f # default: 1.0\n", params.tfs_z); + fprintf(stream, "tfs: %f # default: 1.0\n", sparams.tfs_z); fprintf(stream, "threads: %d # default: %d\n", params.n_threads, std::thread::hardware_concurrency()); - fprintf(stream, "top_k: %d # default: 40\n", params.top_k); - fprintf(stream, "top_p: %f # default: 0.95\n", params.top_p); - fprintf(stream, "typical_p: %f # default: 1.0\n", params.typical_p); + fprintf(stream, "top_k: %d # default: 40\n", sparams.top_k); + fprintf(stream, "top_p: %f # default: 0.95\n", sparams.top_p); + fprintf(stream, "typical_p: %f # default: 1.0\n", sparams.typical_p); fprintf(stream, "verbose_prompt: %s # default: false\n", params.verbose_prompt ? "true" : "false"); } diff --git a/common/common.h b/common/common.h index c80215279..36fd44166 100644 --- a/common/common.h +++ b/common/common.h @@ -4,6 +4,8 @@ #include "llama.h" +#include "sampling.h" + #define LOG_NO_FILE_LINE_FUNCTION #include "log.h" @@ -49,31 +51,12 @@ struct gpt_params { int32_t n_gpu_layers_draft = -1; // number of layers to store in VRAM for the draft model (-1 - use default) int32_t main_gpu = 0; // the GPU that is used for scratch and small tensors float tensor_split[LLAMA_MAX_DEVICES] = {0}; // how split tensors should be distributed across GPUs - int32_t n_probs = 0; // if greater than 0, output the probabilities of top n_probs tokens. int32_t n_beams = 0; // if non-zero then use beam search of given width. float rope_freq_base = 0.0f; // RoPE base frequency float rope_freq_scale = 0.0f; // RoPE frequency scaling factor - // sampling parameters - int32_t top_k = 40; // <= 0 to use vocab size - float top_p = 0.95f; // 1.0 = disabled - float tfs_z = 1.00f; // 1.0 = disabled - float typical_p = 1.00f; // 1.0 = disabled - float temp = 0.80f; // 1.0 = disabled - float repeat_penalty = 1.10f; // 1.0 = disabled - int32_t repeat_last_n = 64; // last n tokens to penalize (0 = disable penalty, -1 = context size) - float frequency_penalty = 0.00f; // 0.0 = disabled - float presence_penalty = 0.00f; // 0.0 = disabled - int32_t mirostat = 0; // 0 = disabled, 1 = mirostat, 2 = mirostat 2.0 - float mirostat_tau = 5.00f; // target entropy - float mirostat_eta = 0.10f; // learning rate - - std::unordered_map logit_bias; // logit bias for specific tokens - - // Classifier-Free Guidance - // https://arxiv.org/abs/2306.17806 - std::string cfg_negative_prompt; // string to help guidance - float cfg_scale = 1.f; // How strong is guidance + // // sampling parameters + struct llama_sampling_params sampling_params; std::string model = "models/7B/ggml-model-f16.gguf"; // model path std::string model_draft = ""; // draft model for speculative decoding @@ -115,13 +98,16 @@ struct gpt_params { bool input_prefix_bos = false; // prefix BOS to user inputs, preceding input_prefix bool ignore_eos = false; // ignore generated EOS tokens bool instruct = false; // instruction mode (used for Alpaca models) - bool penalize_nl = true; // consider newlines as a repeatable token bool logits_all = false; // return logits for all tokens in the batch bool use_mmap = true; // use mmap for faster loads bool use_mlock = false; // use mlock to keep model in memory bool numa = false; // attempt optimizations that help on some NUMA systems bool verbose_prompt = false; // print prompt tokens before generation bool infill = false; // use infill mode + + // multimodal models (see examples/llava) + std::string mmproj = ""; // path to multimodal projector + std::string image = ""; // path to an image file }; bool gpt_params_parse(int argc, char ** argv, gpt_params & params); @@ -180,36 +166,6 @@ std::string llama_detokenize_bpe( llama_context * ctx, const std::vector & tokens); -// -// Sampling utils -// - -// this is a common sampling function used across the examples for convenience -// it can serve as a starting point for implementing your own sampling function -// -// required: -// - ctx: context to use for sampling -// - params: sampling parameters -// -// optional: -// - ctx_guidance: context to use for classifier-free guidance, ignore if NULL -// - grammar: grammar to use for sampling, ignore if NULL -// - last_tokens: needed for repetition penalty, ignore if empty -// - idx: sample from llama_get_logits_ith(ctx, idx) -// -// returns: -// - token: sampled token -// - candidates: vector of candidate tokens -// -llama_token llama_sample_token( - struct llama_context * ctx, - struct llama_context * ctx_guidance, - struct llama_grammar * grammar, - const struct gpt_params & params, - const std::vector & last_tokens, - std::vector & candidates, - int idx = 0); - // // YAML utils // diff --git a/common/sampling.cpp b/common/sampling.cpp new file mode 100644 index 000000000..8ce419459 --- /dev/null +++ b/common/sampling.cpp @@ -0,0 +1,166 @@ +#include "sampling.h" + +llama_sampling_context::~llama_sampling_context() { + for (auto & it : sequence_contexts) { + if (it.second.grammar != NULL) { + llama_grammar_free(it.second.grammar); + it.second.grammar = NULL; + } + } +} + +llama_sampling_context llama_sampling_context_init( + const struct gpt_params & params, + llama_grammar * grammar) { + llama_sampling_context result; + + result.params = params.sampling_params; + result.grammar = grammar; + return result; +} + +// Note: Creates the context if it doesn't exist, so this always return something. +llama_sampler_sequence_context & llama_sampling_get_sequence_context( + llama_sampling_context & ctx_sampling, + const llama_seq_id seq) { + const auto it = ctx_sampling.sequence_contexts.find(seq); + if (it != ctx_sampling.sequence_contexts.end()) { + return it->second; + } + llama_sampler_sequence_context new_ctx = { + 2.0f * ctx_sampling.params.mirostat_tau, + ctx_sampling.grammar != NULL ? llama_grammar_copy(ctx_sampling.grammar) : NULL, + }; + return ctx_sampling.sequence_contexts.insert({seq, new_ctx}).first->second; +} + +bool llama_sampling_context_reset( + llama_sampling_context & ctx_sampling, + const llama_seq_id seq) { + const auto it = ctx_sampling.sequence_contexts.find(seq); + if (it == ctx_sampling.sequence_contexts.end()) return false; + if (it->second.grammar != NULL) { + llama_grammar_free(it->second.grammar); + it->second.grammar = NULL; + } + ctx_sampling.sequence_contexts.erase(it); + return true; +} + +llama_token llama_sampling_sample( + struct llama_context * ctx, + struct llama_context * ctx_guidance, + struct llama_sampling_context & ctx_sampling, + const std::vector & last_tokens, + std::vector & candidates, + const int idx, + llama_seq_id seq) { + const int n_ctx = llama_n_ctx(ctx); + const int n_vocab = llama_n_vocab(llama_get_model(ctx)); + + const llama_sampling_params & params = ctx_sampling.params; + const float temp = params.temp; + const int32_t top_k = params.top_k <= 0 ? n_vocab : params.top_k; + const float top_p = params.top_p; + const float tfs_z = params.tfs_z; + const float typical_p = params.typical_p; + const int32_t repeat_last_n = params.repeat_last_n < 0 ? n_ctx : params.repeat_last_n; + const float repeat_penalty = params.repeat_penalty; + const float alpha_presence = params.presence_penalty; + const float alpha_frequency = params.frequency_penalty; + const int mirostat = params.mirostat; + const float mirostat_tau = params.mirostat_tau; + const float mirostat_eta = params.mirostat_eta; + const bool penalize_nl = params.penalize_nl; + + llama_token id = 0; + + float * logits = llama_get_logits_ith(ctx, idx); + + // Apply params.logit_bias map + for (auto it = params.logit_bias.begin(); it != params.logit_bias.end(); it++) { + logits[it->first] += it->second; + } + + candidates.clear(); + for (llama_token token_id = 0; token_id < n_vocab; token_id++) { + candidates.emplace_back(llama_token_data{token_id, logits[token_id], 0.0f}); + } + + llama_token_data_array cur_p = { candidates.data(), candidates.size(), false }; + + if (ctx_guidance) { + llama_sample_classifier_free_guidance(ctx, &cur_p, ctx_guidance, params.cfg_scale); + } + + // apply penalties + if (!last_tokens.empty()) { + const float nl_logit = logits[llama_token_nl(ctx)]; + const int last_n_repeat = std::min(std::min((int)last_tokens.size(), repeat_last_n), n_ctx); + + llama_sample_repetition_penalty(ctx, &cur_p, + last_tokens.data() + last_tokens.size() - last_n_repeat, + last_n_repeat, repeat_penalty); + llama_sample_frequency_and_presence_penalties(ctx, &cur_p, + last_tokens.data() + last_tokens.size() - last_n_repeat, + last_n_repeat, alpha_frequency, alpha_presence); + + if (!penalize_nl) { + for (size_t idx = 0; idx < cur_p.size; idx++) { + if (cur_p.data[idx].id == llama_token_nl(ctx)) { + cur_p.data[idx].logit = nl_logit; + break; + } + } + } + } + + llama_sampler_sequence_context & ctx_seq = llama_sampling_get_sequence_context(ctx_sampling, seq); + + if (ctx_seq.grammar != NULL) { + llama_sample_grammar(ctx, &cur_p, ctx_seq.grammar); + } + + if (temp <= 0) { + // Greedy sampling + id = llama_sample_token_greedy(ctx, &cur_p); + } else { + if (mirostat == 1) { + const int mirostat_m = 100; + llama_sample_temp(ctx, &cur_p, temp); + id = llama_sample_token_mirostat(ctx, &cur_p, mirostat_tau, mirostat_eta, mirostat_m, &ctx_seq.mirostat_mu); + } else if (mirostat == 2) { + llama_sample_temp(ctx, &cur_p, temp); + id = llama_sample_token_mirostat_v2(ctx, &cur_p, mirostat_tau, mirostat_eta, &ctx_seq.mirostat_mu); + } else { + // Temperature sampling + size_t min_keep = std::max(1, params.n_probs); + llama_sample_top_k (ctx, &cur_p, top_k, min_keep); + llama_sample_tail_free (ctx, &cur_p, tfs_z, min_keep); + llama_sample_typical (ctx, &cur_p, typical_p, min_keep); + llama_sample_top_p (ctx, &cur_p, top_p, min_keep); + llama_sample_temp(ctx, &cur_p, temp); + + { + const int n_top = 10; + LOG("top %d candidates:\n", n_top); + + for (int i = 0; i < n_top; i++) { + const llama_token id = cur_p.data[i].id; + (void)id; // To avoid a warning that id is unused when logging is disabled. + LOG(" - %5d: '%12s' (%.3f)\n", id, llama_token_to_piece(ctx, id).c_str(), cur_p.data[i].p); + } + } + + id = llama_sample_token(ctx, &cur_p); + + LOG("sampled token: %5d: '%s'\n", id, llama_token_to_piece(ctx, id).c_str()); + } + } + + if (ctx_seq.grammar != NULL) { + llama_grammar_accept_token(ctx, ctx_seq.grammar, id); + } + + return id; +} diff --git a/common/sampling.h b/common/sampling.h new file mode 100644 index 000000000..0aab5d03c --- /dev/null +++ b/common/sampling.h @@ -0,0 +1,108 @@ +#pragma once + +#include "llama.h" + +#include +#include +#include + +// sampling parameters +typedef struct llama_sampling_params { + int32_t top_k = 40; // <= 0 to use vocab size + float top_p = 0.95f; // 1.0 = disabled + float tfs_z = 1.00f; // 1.0 = disabled + float typical_p = 1.00f; // 1.0 = disabled + float temp = 0.80f; // 1.0 = disabled + float repeat_penalty = 1.10f; // 1.0 = disabled + int32_t repeat_last_n = 64; // last n tokens to penalize (0 = disable penalty, -1 = context size) + float frequency_penalty = 0.00f; // 0.0 = disabled + float presence_penalty = 0.00f; // 0.0 = disabled + int32_t mirostat = 0; // 0 = disabled, 1 = mirostat, 2 = mirostat 2.0 + float mirostat_tau = 5.00f; // target entropy + float mirostat_eta = 0.10f; // learning rate + + bool penalize_nl = true; // consider newlines as a repeatable token + + int32_t n_probs = 0; // if greater than 0, output the probabilities of top n_probs tokens. + + // Classifier-Free Guidance + // https://arxiv.org/abs/2306.17806 + std::string cfg_negative_prompt; // string to help guidance + float cfg_scale = 1.f; // How strong is guidance + + std::unordered_map logit_bias; // logit bias for specific tokens + +} llama_sampling_params; + +// per-sequence sampler context +typedef struct llama_sampler_sequence_context { + float mirostat_mu; // mirostat sampler state + llama_grammar * grammar; +} llama_sampler_sequence_context; + +// general sampler context +typedef struct llama_sampling_context { + ~llama_sampling_context(); + + // parameters that will be used for sampling and when creating + // new llama_sampler_sequence_context instances + llama_sampling_params params; + + // map of sequence ids to sampler contexts + std::unordered_map sequence_contexts; + + // when non-NULL, new instances of llama_sampler_sequence_context + // will get a copy of the grammar here + // note: only the pointer is stored here, it is not a copy of + // the grammar and shouldn't be freed + llama_grammar * grammar; +} llama_sampling_context; + +#include "common.h" + +// Create a new sampling context instance. +llama_sampling_context llama_sampling_context_init( + const struct gpt_params & params, + llama_grammar * grammar = NULL); + +// Fetches the sampler context for the specified sequence id (defaults to 0). +// If the context for that sequence id doesn't already exist, it will be created with +// default values based on the parameters in the ctx_sampling argument. +llama_sampler_sequence_context & llama_sampling_get_sequence_context( + llama_sampling_context & ctx_sampling, + const llama_seq_id seq = 0); + +// Reset the sampler context for the supplied sequence id (defaults to 0). +// This is necessary to reuse a sequence id or free memory used by sequences +// that are no longer required. +bool llama_sampling_context_reset( + llama_sampling_context & ctx_sampling, + const llama_seq_id seq = 0); + +// this is a common sampling function used across the examples for convenience +// it can serve as a starting point for implementing your own sampling function +// Note: When using multiple sequences, it is the caller's responsibility to call +// llama_sampling_context_reset when a sequence ends +// +// required: +// - ctx: context to use for sampling +// - ctx_sampling: sampling-specific context +// +// optional: +// - ctx_guidance: context to use for classifier-free guidance, ignore if NULL +// - last_tokens: needed for repetition penalty, ignore if empty +// - idx: sample from llama_get_logits_ith(ctx, idx) +// - seq: sequence id to associate sampler state with +// +// returns: +// - token: sampled token +// - candidates: vector of candidate tokens +// +llama_token llama_sampling_sample( + struct llama_context * ctx, + struct llama_context * ctx_guidance, + struct llama_sampling_context & ctx_sampling, + const std::vector & last_tokens, + std::vector & candidates, + const int idx = 0, + llama_seq_id seq = 0); diff --git a/common/stb_image.h b/common/stb_image.h new file mode 100644 index 000000000..4766d7e67 --- /dev/null +++ b/common/stb_image.h @@ -0,0 +1,8396 @@ +/* stb_image - v2.28 - public domain image loader - http://nothings.org/stb + no warranty implied; use at your own risk + + Do this: + #define STB_IMAGE_IMPLEMENTATION + before you include this file in *one* C or C++ file to create the implementation. + + // i.e. it should look like this: + #include ... + #include ... + #include ... + #define STB_IMAGE_IMPLEMENTATION + #include "stb_image.h" + + You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. + And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free + + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) + PNG 1/2/4/8/16-bit-per-channel + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels, 8/16 bit-per-channel) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + PNM (PPM and PGM binary only) + + Animated GIF still needs a proper API, but here's one way to do it: + http://gist.github.com/urraka/685d9a6340b26b830d49 + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) + + Full documentation under "DOCUMENTATION" below. + + +LICENSE + + See end of file for license information. + +RECENT REVISION HISTORY: + + 2.28 (2023-01-29) many error fixes, security errors, just tons of stuff + 2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes + 2.26 (2020-07-13) many minor fixes + 2.25 (2020-02-02) fix warnings + 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically + 2.23 (2019-08-11) fix clang static analysis warning + 2.22 (2019-03-04) gif fixes, fix warnings + 2.21 (2019-02-25) fix typo in comment + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings + 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes + 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 + RGB-format JPEG; remove white matting in PSD; + allocate large structures on the stack; + correct channel count for PNG & BMP + 2.10 (2016-01-22) avoid warning introduced in 2.09 + 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED + + See end of file for full revision history. + + + ============================ Contributors ========================= + + Image formats Extensions, features + Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) + Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) + Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) + Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) + Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) + Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) + Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) + github:urraka (animated gif) Junggon Kim (PNM comments) + Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) + socks-the-fox (16-bit PNG) + Jeremy Sawicki (handle all ImageNet JPGs) + Optimizations & bugfixes Mikhail Morozov (1-bit BMP) + Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) + Arseny Kapoulkine Simon Breuss (16-bit PNM) + John-Mark Allen + Carmelo J Fdez-Aguera + + Bug & warning fixes + Marc LeBlanc David Woo Guillaume George Martins Mozeiko + Christpher Lloyd Jerry Jansson Joseph Thomson Blazej Dariusz Roszkowski + Phil Jordan Dave Moore Roy Eltham + Hayaki Saito Nathan Reed Won Chun + Luke Graham Johan Duparc Nick Verigakis the Horde3D community + Thomas Ruf Ronny Chevalier github:rlyeh + Janez Zemva John Bartholomew Michal Cichon github:romigrou + Jonathan Blow Ken Hamada Tero Hanninen github:svdijk + Eugene Golushkov Laurent Gomila Cort Stratton github:snagar + Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex + Cass Everitt Ryamond Barbiero github:grim210 + Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw + Philipp Wiesemann Dale Weiler Oriol Ferrer Mesia github:phprus + Josh Tobin Neil Bickford Matthew Gregan github:poppolopoppo + Julian Raschke Gregory Mullen Christian Floisand github:darealshinji + Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007 + Brad Weinberger Matvey Cherevko github:mosra + Luca Sas Alexander Veselov Zack Middleton [reserved] + Ryan C. Gordon [reserved] [reserved] + DO NOT ADD YOUR NAME HERE + + Jacko Dirks + + To add your name to the credits, pick a random blank space in the middle and fill it. + 80% of merge conflicts on stb PRs are due to people adding their name at the end + of the credits. +*/ + +#ifndef STBI_INCLUDE_STB_IMAGE_H +#define STBI_INCLUDE_STB_IMAGE_H + +// DOCUMENTATION +// +// Limitations: +// - no 12-bit-per-channel JPEG +// - no JPEGs with arithmetic coding +// - GIF always returns *comp=4 +// +// Basic usage (see HDR discussion below for HDR usage): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// // ... but 'n' will always be the number that it would have been if you said 0 +// stbi_image_free(data); +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *channels_in_file -- outputs # of image components in image file +// int desired_channels -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data, or NULL on an allocation failure or if the image is +// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'desired_channels' if desired_channels is non-zero, or +// *channels_in_file otherwise. If desired_channels is non-zero, +// *channels_in_file has the number of components that _would_ have been +// output otherwise. E.g. if you set desired_channels to 4, you will always +// get RGBA output, but you can check *channels_in_file to see if it's trivially +// opaque because e.g. there were only 3 channels in the source image. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *channels_in_file will be unchanged. The function +// stbi_failure_reason() can be queried for an extremely brief, end-user +// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS +// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. +// +// To query the width, height and component count of an image without having to +// decode the full file, you can use the stbi_info family of functions: +// +// int x,y,n,ok; +// ok = stbi_info(filename, &x, &y, &n); +// // returns ok=1 and sets x, y, n if image is a supported format, +// // 0 otherwise. +// +// Note that stb_image pervasively uses ints in its public API for sizes, +// including sizes of memory buffers. This is now part of the API and thus +// hard to change without causing breakage. As a result, the various image +// loaders all have certain limits on image size; these differ somewhat +// by format but generally boil down to either just under 2GB or just under +// 1GB. When the decoded image would be larger than this, stb_image decoding +// will fail. +// +// Additionally, stb_image will reject image files that have any of their +// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS, +// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit, +// the only way to have an image with such dimensions load correctly +// is for it to have a rather extreme aspect ratio. Either way, the +// assumption here is that such larger images are likely to be malformed +// or malicious. If you do need to load an image with individual dimensions +// larger than that, and it still fits in the overall size limit, you can +// #define STBI_MAX_DIMENSIONS on your own to be something larger. +// +// =========================================================================== +// +// UNICODE: +// +// If compiling for Windows and you wish to use Unicode filenames, compile +// with +// #define STBI_WINDOWS_UTF8 +// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert +// Windows wchar_t filenames to utf8. +// +// =========================================================================== +// +// Philosophy +// +// stb libraries are designed with the following priorities: +// +// 1. easy to use +// 2. easy to maintain +// 3. good performance +// +// Sometimes I let "good performance" creep up in priority over "easy to maintain", +// and for best performance I may provide less-easy-to-use APIs that give higher +// performance, in addition to the easy-to-use ones. Nevertheless, it's important +// to keep in mind that from the standpoint of you, a client of this library, +// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. +// +// Some secondary priorities arise directly from the first two, some of which +// provide more explicit reasons why performance can't be emphasized. +// +// - Portable ("ease of use") +// - Small source code footprint ("easy to maintain") +// - No dependencies ("ease of use") +// +// =========================================================================== +// +// I/O callbacks +// +// I/O callbacks allow you to read from arbitrary sources, like packaged +// files or some other source. Data read from callbacks are processed +// through a small internal buffer (currently 128 bytes) to try to reduce +// overhead. +// +// The three functions you must define are "read" (reads some bytes of data), +// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). +// +// =========================================================================== +// +// SIMD support +// +// The JPEG decoder will try to automatically use SIMD kernels on x86 when +// supported by the compiler. For ARM Neon support, you must explicitly +// request it. +// +// (The old do-it-yourself SIMD API is no longer supported in the current +// code.) +// +// On x86, SSE2 will automatically be used when available based on a run-time +// test; if not, the generic C versions are used as a fall-back. On ARM targets, +// the typical path is to have separate builds for NEON and non-NEON devices +// (at least this is true for iOS and Android). Therefore, the NEON support is +// toggled by a build flag: define STBI_NEON to get NEON loops. +// +// If for some reason you do not want to use any of SIMD code, or if +// you have issues compiling it, you can disable it entirely by +// defining STBI_NO_SIMD. +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image supports loading HDR images in general, and currently the Radiance +// .HDR file format specifically. You can still load any file through the existing +// interface; if you attempt to load an HDR file, it will be automatically remapped +// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// iPhone PNG support: +// +// We optionally support converting iPhone-formatted PNGs (which store +// premultiplied BGRA) back to RGB, even though they're internally encoded +// differently. To enable this conversion, call +// stbi_convert_iphone_png_to_rgb(1). +// +// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per +// pixel to remove any premultiplied alpha *only* if the image file explicitly +// says there's premultiplied data (currently only happens in iPhone images, +// and only if iPhone convert-to-rgb processing is on). +// +// =========================================================================== +// +// ADDITIONAL CONFIGURATION +// +// - You can suppress implementation of any of the decoders to reduce +// your code footprint by #defining one or more of the following +// symbols before creating the implementation. +// +// STBI_NO_JPEG +// STBI_NO_PNG +// STBI_NO_BMP +// STBI_NO_PSD +// STBI_NO_TGA +// STBI_NO_GIF +// STBI_NO_HDR +// STBI_NO_PIC +// STBI_NO_PNM (.ppm and .pgm) +// +// - You can request *only* certain decoders and suppress all other ones +// (this will be more forward-compatible, as addition of new decoders +// doesn't require you to disable them explicitly): +// +// STBI_ONLY_JPEG +// STBI_ONLY_PNG +// STBI_ONLY_BMP +// STBI_ONLY_PSD +// STBI_ONLY_TGA +// STBI_ONLY_GIF +// STBI_ONLY_HDR +// STBI_ONLY_PIC +// STBI_ONLY_PNM (.ppm and .pgm) +// +// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still +// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB +// +// - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater +// than that size (in either width or height) without further processing. +// This is to let programs in the wild set an upper bound to prevent +// denial-of-service attacks on untrusted data, as one could generate a +// valid image of gigantic dimensions and force stb_image to allocate a +// huge block of memory and spend disproportionate time decoding it. By +// default this is set to (1 << 24), which is 16777216, but that's still +// very big. + +#ifndef STBI_NO_STDIO +#include +#endif // STBI_NO_STDIO + +#define STBI_VERSION 1 + +enum { + STBI_default = 0, // only used for desired_channels + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4 +}; + +#include +typedef unsigned char stbi_uc; +typedef unsigned short stbi_us; + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef STBIDEF +#ifdef STB_IMAGE_STATIC +#define STBIDEF static +#else +#define STBIDEF extern +#endif +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// PRIMARY API - works on images of any type +// + +// +// load image by filename, open file, or memory buffer +// + +typedef struct { + int (*read)(void * user, char * data, + int size); // fill 'data' with 'size' bytes. return number of bytes actually read + void (*skip)(void * user, int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative + int (*eof)(void * user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +//////////////////////////////////// +// +// 8-bits-per-channel interface +// + +STBIDEF stbi_uc * stbi_load_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels); +STBIDEF stbi_uc * stbi_load_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, + int * channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_uc * stbi_load(char const * filename, int * x, int * y, int * channels_in_file, int desired_channels); +STBIDEF stbi_uc * stbi_load_from_file(FILE * f, int * x, int * y, int * channels_in_file, int desired_channels); +// for stbi_load_from_file, file pointer is left pointing immediately after image +#endif + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc * stbi_load_gif_from_memory(stbi_uc const * buffer, int len, int ** delays, int * x, int * y, int * z, + int * comp, int req_comp); +#endif + +#ifdef STBI_WINDOWS_UTF8 +STBIDEF int stbi_convert_wchar_to_utf8(char * buffer, size_t bufferlen, const wchar_t * input); +#endif + +//////////////////////////////////// +// +// 16-bits-per-channel interface +// + +STBIDEF stbi_us * stbi_load_16_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels); +STBIDEF stbi_us * stbi_load_16_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, + int * channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_us * stbi_load_16(char const * filename, int * x, int * y, int * channels_in_file, int desired_channels); +STBIDEF stbi_us * stbi_load_from_file_16(FILE * f, int * x, int * y, int * channels_in_file, int desired_channels); +#endif + +//////////////////////////////////// +// +// float-per-channel interface +// +#ifndef STBI_NO_LINEAR +STBIDEF float * stbi_loadf_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels); +STBIDEF float * stbi_loadf_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * channels_in_file, + int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF float * stbi_loadf(char const * filename, int * x, int * y, int * channels_in_file, int desired_channels); +STBIDEF float * stbi_loadf_from_file(FILE * f, int * x, int * y, int * channels_in_file, int desired_channels); +#endif +#endif + +#ifndef STBI_NO_HDR +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); +STBIDEF void stbi_hdr_to_ldr_scale(float scale); +#endif // STBI_NO_HDR + +#ifndef STBI_NO_LINEAR +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); +STBIDEF void stbi_ldr_to_hdr_scale(float scale); +#endif // STBI_NO_LINEAR + +// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const * clbk, void * user); +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const * buffer, int len); +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr(char const * filename); +STBIDEF int stbi_is_hdr_from_file(FILE * f); +#endif // STBI_NO_STDIO + +// get a VERY brief reason for failure +// on most compilers (and ALL modern mainstream compilers) this is threadsafe +STBIDEF const char * stbi_failure_reason(void); + +// free the loaded image -- this is just free() +STBIDEF void stbi_image_free(void * retval_from_stbi_load); + +// get image dimensions & components without fully decoding +STBIDEF int stbi_info_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp); +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * comp); +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const * buffer, int len); +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const * clbk, void * user); + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const * filename, int * x, int * y, int * comp); +STBIDEF int stbi_info_from_file(FILE * f, int * x, int * y, int * comp); +STBIDEF int stbi_is_16_bit(char const * filename); +STBIDEF int stbi_is_16_bit_from_file(FILE * f); +#endif + +// for image formats that explicitly notate that they have premultiplied alpha, +// we just return the colors as stored in the file. set this flag to force +// unpremultiplication. results are undefined if the unpremultiply overflow. +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); + +// indicate whether we should process iphone images back to canonical format, +// or just pass them through "as-is" +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); + +// flip the image vertically, so the first pixel in the output array is the bottom left +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); + +// as above, but only applies to images loaded on the thread that calls the function +// this function is only available if your compiler supports thread-local variables; +// calling it will fail to link if your compiler doesn't +STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply); +STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert); +STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip); + +// ZLIB client - used by PNG, available for other purposes + +STBIDEF char * stbi_zlib_decode_malloc_guesssize(const char * buffer, int len, int initial_size, int * outlen); +STBIDEF char * stbi_zlib_decode_malloc_guesssize_headerflag(const char * buffer, int len, int initial_size, int * outlen, + int parse_header); +STBIDEF char * stbi_zlib_decode_malloc(const char * buffer, int len, int * outlen); +STBIDEF int stbi_zlib_decode_buffer(char * obuffer, int olen, const char * ibuffer, int ilen); + +STBIDEF char * stbi_zlib_decode_noheader_malloc(const char * buffer, int len, int * outlen); +STBIDEF int stbi_zlib_decode_noheader_buffer(char * obuffer, int olen, const char * ibuffer, int ilen); + +#ifdef __cplusplus +} +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H + +#ifdef STB_IMAGE_IMPLEMENTATION + +#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) || defined(STBI_ONLY_TGA) || \ + defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || \ + defined(STBI_ONLY_PNM) || defined(STBI_ONLY_ZLIB) +#ifndef STBI_ONLY_JPEG +#define STBI_NO_JPEG +#endif +#ifndef STBI_ONLY_PNG +#define STBI_NO_PNG +#endif +#ifndef STBI_ONLY_BMP +#define STBI_NO_BMP +#endif +#ifndef STBI_ONLY_PSD +#define STBI_NO_PSD +#endif +#ifndef STBI_ONLY_TGA +#define STBI_NO_TGA +#endif +#ifndef STBI_ONLY_GIF +#define STBI_NO_GIF +#endif +#ifndef STBI_ONLY_HDR +#define STBI_NO_HDR +#endif +#ifndef STBI_ONLY_PIC +#define STBI_NO_PIC +#endif +#ifndef STBI_ONLY_PNM +#define STBI_NO_PNM +#endif +#endif + +#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +#define STBI_NO_ZLIB +#endif + +#include +#include +#include // ptrdiff_t on osx +#include +#include + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +#include // ldexp, pow +#endif + +#ifndef STBI_NO_STDIO +#include +#endif + +#ifndef STBI_ASSERT +#include +#define STBI_ASSERT(x) assert(x) +#endif + +#ifdef __cplusplus +#define STBI_EXTERN extern "C" +#else +#define STBI_EXTERN extern +#endif + +#ifndef _MSC_VER +#ifdef __cplusplus +#define stbi_inline inline +#else +#define stbi_inline +#endif +#else +#define stbi_inline __forceinline +#endif + +#ifndef STBI_NO_THREAD_LOCALS +#if defined(__cplusplus) && __cplusplus >= 201103L +#define STBI_THREAD_LOCAL thread_local +#elif defined(__GNUC__) && __GNUC__ < 5 +#define STBI_THREAD_LOCAL __thread +#elif defined(_MSC_VER) +#define STBI_THREAD_LOCAL __declspec(thread) +#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__) +#define STBI_THREAD_LOCAL _Thread_local +#endif + +#ifndef STBI_THREAD_LOCAL +#if defined(__GNUC__) +#define STBI_THREAD_LOCAL __thread +#endif +#endif +#endif + +#if defined(_MSC_VER) || defined(__SYMBIAN32__) +typedef unsigned short stbi__uint16; +typedef signed short stbi__int16; +typedef unsigned int stbi__uint32; +typedef signed int stbi__int32; +#else +#include +typedef uint16_t stbi__uint16; +typedef int16_t stbi__int16; +typedef uint32_t stbi__uint32; +typedef int32_t stbi__int32; +#endif + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1]; + +#ifdef _MSC_VER +#define STBI_NOTUSED(v) (void)(v) +#else +#define STBI_NOTUSED(v) (void)sizeof(v) +#endif + +#ifdef _MSC_VER +#define STBI_HAS_LROTL +#endif + +#ifdef STBI_HAS_LROTL +#define stbi_lrot(x, y) _lrotl(x, y) +#else +#define stbi_lrot(x, y) (((x) << (y)) | ((x) >> (-(y)&31))) +#endif + +#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) +// ok +#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." +#endif + +#ifndef STBI_MALLOC +#define STBI_MALLOC(sz) malloc(sz) +#define STBI_REALLOC(p, newsz) realloc(p, newsz) +#define STBI_FREE(p) free(p) +#endif + +#ifndef STBI_REALLOC_SIZED +#define STBI_REALLOC_SIZED(p, oldsz, newsz) STBI_REALLOC(p, newsz) +#endif + +// x86/x64 detection +#if defined(__x86_64__) || defined(_M_X64) +#define STBI__X64_TARGET +#elif defined(__i386) || defined(_M_IX86) +#define STBI__X86_TARGET +#endif + +#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) +// gcc doesn't support sse2 intrinsics unless you compile with -msse2, +// which in turn means it gets to use SSE2 everywhere. This is unfortunate, +// but previous attempts to provide the SSE2 functions with runtime +// detection caused numerous issues. The way architecture extensions are +// exposed in GCC/Clang is, sadly, not really suited for one-file libs. +// New behavior: if compiled with -msse2, we use SSE2 without any +// detection; if not, we don't use it at all. +#define STBI_NO_SIMD +#endif + +#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) +// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET +// +// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the +// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. +// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not +// simultaneously enabling "-mstackrealign". +// +// See https://github.com/nothings/stb/issues/81 for more information. +// +// So default to no SSE2 on 32-bit MinGW. If you've read this far and added +// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. +#define STBI_NO_SIMD +#endif + +#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) +#define STBI_SSE2 +#include + +#ifdef _MSC_VER + +#if _MSC_VER >= 1400 // not VC6 +#include // __cpuid +static int stbi__cpuid3(void) { + int info[4]; + __cpuid(info, 1); + return info[3]; +} +#else +static int stbi__cpuid3(void) { + int res; + __asm { + mov eax,1 + cpuid + mov res,edx + } + return res; +} +#endif + +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) { + int info3 = stbi__cpuid3(); + return ((info3 >> 26) & 1) != 0; +} +#endif + +#else // assume GCC-style if not VC++ +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) { + // If we're even attempting to compile this on GCC/Clang, that means + // -msse2 is on, which means the compiler is allowed to use SSE2 + // instructions at will, and so are we. + return 1; +} +#endif + +#endif +#endif + +// ARM NEON +#if defined(STBI_NO_SIMD) && defined(STBI_NEON) +#undef STBI_NEON +#endif + +#ifdef STBI_NEON +#include +#ifdef _MSC_VER +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name +#else +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) +#endif +#endif + +#ifndef STBI_SIMD_ALIGN +#define STBI_SIMD_ALIGN(type, name) type name +#endif + +#ifndef STBI_MAX_DIMENSIONS +#define STBI_MAX_DIMENSIONS (1 << 24) +#endif + +/////////////////////////////////////////////// +// +// stbi__context struct and start_xxx functions + +// stbi__context structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct { + stbi__uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void * io_user_data; + + int read_from_callbacks; + int buflen; + stbi_uc buffer_start[128]; + int callback_already_read; + + stbi_uc *img_buffer, *img_buffer_end; + stbi_uc *img_buffer_original, *img_buffer_original_end; +} stbi__context; + +static void stbi__refill_buffer(stbi__context * s); + +// initialize a memory-decode context +static void stbi__start_mem(stbi__context * s, stbi_uc const * buffer, int len) { + s->io.read = NULL; + s->read_from_callbacks = 0; + s->callback_already_read = 0; + s->img_buffer = s->img_buffer_original = (stbi_uc *)buffer; + s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *)buffer + len; +} + +// initialize a callback-based context +static void stbi__start_callbacks(stbi__context * s, stbi_io_callbacks * c, void * user) { + s->io = *c; + s->io_user_data = user; + s->buflen = sizeof(s->buffer_start); + s->read_from_callbacks = 1; + s->callback_already_read = 0; + s->img_buffer = s->img_buffer_original = s->buffer_start; + stbi__refill_buffer(s); + s->img_buffer_original_end = s->img_buffer_end; +} + +#ifndef STBI_NO_STDIO + +static int stbi__stdio_read(void * user, char * data, int size) { return (int)fread(data, 1, size, (FILE *)user); } + +static void stbi__stdio_skip(void * user, int n) { + int ch; + fseek((FILE *)user, n, SEEK_CUR); + ch = fgetc((FILE *)user); /* have to read a byte to reset feof()'s flag */ + if (ch != EOF) { + ungetc(ch, (FILE *)user); /* push byte back onto stream if valid. */ + } +} + +static int stbi__stdio_eof(void * user) { return feof((FILE *)user) || ferror((FILE *)user); } + +static stbi_io_callbacks stbi__stdio_callbacks = { + stbi__stdio_read, + stbi__stdio_skip, + stbi__stdio_eof, +}; + +static void stbi__start_file(stbi__context * s, FILE * f) { stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *)f); } + +// static void stop_file(stbi__context *s) { } + +#endif // !STBI_NO_STDIO + +static void stbi__rewind(stbi__context * s) { + // conceptually rewind SHOULD rewind to the beginning of the stream, + // but we just rewind to the beginning of the initial buffer, because + // we only use it after doing 'test', which only ever looks at at most 92 bytes + s->img_buffer = s->img_buffer_original; + s->img_buffer_end = s->img_buffer_original_end; +} + +enum { STBI_ORDER_RGB, STBI_ORDER_BGR }; + +typedef struct { + int bits_per_channel; + int num_channels; + int channel_order; +} stbi__result_info; + +#ifndef STBI_NO_JPEG +static int stbi__jpeg_test(stbi__context * s); +static void * stbi__jpeg_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__jpeg_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PNG +static int stbi__png_test(stbi__context * s); +static void * stbi__png_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__png_info(stbi__context * s, int * x, int * y, int * comp); +static int stbi__png_is16(stbi__context * s); +#endif + +#ifndef STBI_NO_BMP +static int stbi__bmp_test(stbi__context * s); +static void * stbi__bmp_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__bmp_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_TGA +static int stbi__tga_test(stbi__context * s); +static void * stbi__tga_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__tga_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context * s); +static void * stbi__psd_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri, int bpc); +static int stbi__psd_info(stbi__context * s, int * x, int * y, int * comp); +static int stbi__psd_is16(stbi__context * s); +#endif + +#ifndef STBI_NO_HDR +static int stbi__hdr_test(stbi__context * s); +static float * stbi__hdr_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__hdr_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_test(stbi__context * s); +static void * stbi__pic_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__pic_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_GIF +static int stbi__gif_test(stbi__context * s); +static void * stbi__gif_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static void * stbi__load_gif_main(stbi__context * s, int ** delays, int * x, int * y, int * z, int * comp, int req_comp); +static int stbi__gif_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PNM +static int stbi__pnm_test(stbi__context * s); +static void * stbi__pnm_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__pnm_info(stbi__context * s, int * x, int * y, int * comp); +static int stbi__pnm_is16(stbi__context * s); +#endif + +static +#ifdef STBI_THREAD_LOCAL + STBI_THREAD_LOCAL +#endif + const char * stbi__g_failure_reason; + +STBIDEF const char * stbi_failure_reason(void) { return stbi__g_failure_reason; } + +#ifndef STBI_NO_FAILURE_STRINGS +static int stbi__err(const char * str) { + stbi__g_failure_reason = str; + return 0; +} +#endif + +static void * stbi__malloc(size_t size) { return STBI_MALLOC(size); } + +// stb_image uses ints pervasively, including for offset calculations. +// therefore the largest decoded image size we can support with the +// current code, even on 64-bit targets, is INT_MAX. this is not a +// significant limitation for the intended use case. +// +// we do, however, need to make sure our size calculations don't +// overflow. hence a few helper functions for size calculations that +// multiply integers together, making sure that they're non-negative +// and no overflow occurs. + +// return 1 if the sum is valid, 0 on overflow. +// negative terms are considered invalid. +static int stbi__addsizes_valid(int a, int b) { + if (b < 0) + return 0; + // now 0 <= b <= INT_MAX, hence also + // 0 <= INT_MAX - b <= INTMAX. + // And "a + b <= INT_MAX" (which might overflow) is the + // same as a <= INT_MAX - b (no overflow) + return a <= INT_MAX - b; +} + +// returns 1 if the product is valid, 0 on overflow. +// negative factors are considered invalid. +static int stbi__mul2sizes_valid(int a, int b) { + if (a < 0 || b < 0) + return 0; + if (b == 0) + return 1; // mul-by-0 is always safe + // portable way to check for no overflows in a*b + return a <= INT_MAX / b; +} + +#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) +// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow +static int stbi__mad2sizes_valid(int a, int b, int add) { + return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add); +} +#endif + +// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow +static int stbi__mad3sizes_valid(int a, int b, int c, int add) { + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__addsizes_valid(a * b * c, add); +} + +// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) +static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) { + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__mul2sizes_valid(a * b * c, d) && + stbi__addsizes_valid(a * b * c * d, add); +} +#endif + +#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) +// mallocs with size overflow checking +static void * stbi__malloc_mad2(int a, int b, int add) { + if (!stbi__mad2sizes_valid(a, b, add)) + return NULL; + return stbi__malloc(a * b + add); +} +#endif + +static void * stbi__malloc_mad3(int a, int b, int c, int add) { + if (!stbi__mad3sizes_valid(a, b, c, add)) + return NULL; + return stbi__malloc(a * b * c + add); +} + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) +static void * stbi__malloc_mad4(int a, int b, int c, int d, int add) { + if (!stbi__mad4sizes_valid(a, b, c, d, add)) + return NULL; + return stbi__malloc(a * b * c * d + add); +} +#endif + +// returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow. +static int stbi__addints_valid(int a, int b) { + if ((a >= 0) != (b >= 0)) + return 1; // a and b have different signs, so no overflow + if (a < 0 && b < 0) + return a >= INT_MIN - b; // same as a + b >= INT_MIN; INT_MIN - b cannot overflow since b < 0. + return a <= INT_MAX - b; +} + +// returns 1 if the product of two signed shorts is valid, 0 on overflow. +static int stbi__mul2shorts_valid(short a, short b) { + if (b == 0 || b == -1) + return 1; // multiplication by 0 is always 0; check for -1 so SHRT_MIN/b doesn't overflow + if ((a >= 0) == (b >= 0)) + return a <= SHRT_MAX / b; // product is positive, so similar to mul2sizes_valid + if (b < 0) + return a <= SHRT_MIN / b; // same as a * b >= SHRT_MIN + return a >= SHRT_MIN / b; +} + +// stbi__err - error +// stbi__errpf - error returning pointer to float +// stbi__errpuc - error returning pointer to unsigned char + +#ifdef STBI_NO_FAILURE_STRINGS +#define stbi__err(x, y) 0 +#elif defined(STBI_FAILURE_USERMSG) +#define stbi__err(x, y) stbi__err(y) +#else +#define stbi__err(x, y) stbi__err(x) +#endif + +#define stbi__errpf(x, y) ((float *)(size_t)(stbi__err(x, y) ? NULL : NULL)) +#define stbi__errpuc(x, y) ((unsigned char *)(size_t)(stbi__err(x, y) ? NULL : NULL)) + +STBIDEF void stbi_image_free(void * retval_from_stbi_load) { STBI_FREE(retval_from_stbi_load); } + +#ifndef STBI_NO_LINEAR +static float * stbi__ldr_to_hdr(stbi_uc * data, int x, int y, int comp); +#endif + +#ifndef STBI_NO_HDR +static stbi_uc * stbi__hdr_to_ldr(float * data, int x, int y, int comp); +#endif + +static int stbi__vertically_flip_on_load_global = 0; + +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) { + stbi__vertically_flip_on_load_global = flag_true_if_should_flip; +} + +#ifndef STBI_THREAD_LOCAL +#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global +#else +static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set; + +STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) { + stbi__vertically_flip_on_load_local = flag_true_if_should_flip; + stbi__vertically_flip_on_load_set = 1; +} + +#define stbi__vertically_flip_on_load \ + (stbi__vertically_flip_on_load_set ? stbi__vertically_flip_on_load_local : stbi__vertically_flip_on_load_global) +#endif // STBI_THREAD_LOCAL + +static void * stbi__load_main(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri, int bpc) { + memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields + ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed + ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order + ri->num_channels = 0; + +// test the formats with a very explicit header first (at least a FOURCC +// or distinctive magic number first) +#ifndef STBI_NO_PNG + if (stbi__png_test(s)) + return stbi__png_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_BMP + if (stbi__bmp_test(s)) + return stbi__bmp_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_GIF + if (stbi__gif_test(s)) + return stbi__gif_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_PSD + if (stbi__psd_test(s)) + return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc); +#else + STBI_NOTUSED(bpc); +#endif +#ifndef STBI_NO_PIC + if (stbi__pic_test(s)) + return stbi__pic_load(s, x, y, comp, req_comp, ri); +#endif + +// then the formats that can end up attempting to load with just 1 or 2 +// bytes matching expectations; these are prone to false positives, so +// try them later +#ifndef STBI_NO_JPEG + if (stbi__jpeg_test(s)) + return stbi__jpeg_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_PNM + if (stbi__pnm_test(s)) + return stbi__pnm_load(s, x, y, comp, req_comp, ri); +#endif + +#ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + float * hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri); + return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } +#endif + +#ifndef STBI_NO_TGA + // test tga last because it's a crappy test! + if (stbi__tga_test(s)) + return stbi__tga_load(s, x, y, comp, req_comp, ri); +#endif + + return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); +} + +static stbi_uc * stbi__convert_16_to_8(stbi__uint16 * orig, int w, int h, int channels) { + int i; + int img_len = w * h * channels; + stbi_uc * reduced; + + reduced = (stbi_uc *)stbi__malloc(img_len); + if (reduced == NULL) + return stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling + + STBI_FREE(orig); + return reduced; +} + +static stbi__uint16 * stbi__convert_8_to_16(stbi_uc * orig, int w, int h, int channels) { + int i; + int img_len = w * h * channels; + stbi__uint16 * enlarged; + + enlarged = (stbi__uint16 *)stbi__malloc(img_len * 2); + if (enlarged == NULL) + return (stbi__uint16 *)stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff + + STBI_FREE(orig); + return enlarged; +} + +static void stbi__vertical_flip(void * image, int w, int h, int bytes_per_pixel) { + int row; + size_t bytes_per_row = (size_t)w * bytes_per_pixel; + stbi_uc temp[2048]; + stbi_uc * bytes = (stbi_uc *)image; + + for (row = 0; row < (h >> 1); row++) { + stbi_uc * row0 = bytes + row * bytes_per_row; + stbi_uc * row1 = bytes + (h - row - 1) * bytes_per_row; + // swap row0 with row1 + size_t bytes_left = bytes_per_row; + while (bytes_left) { + size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); + memcpy(temp, row0, bytes_copy); + memcpy(row0, row1, bytes_copy); + memcpy(row1, temp, bytes_copy); + row0 += bytes_copy; + row1 += bytes_copy; + bytes_left -= bytes_copy; + } + } +} + +#ifndef STBI_NO_GIF +static void stbi__vertical_flip_slices(void * image, int w, int h, int z, int bytes_per_pixel) { + int slice; + int slice_size = w * h * bytes_per_pixel; + + stbi_uc * bytes = (stbi_uc *)image; + for (slice = 0; slice < z; ++slice) { + stbi__vertical_flip(bytes, w, h, bytes_per_pixel); + bytes += slice_size; + } +} +#endif + +static unsigned char * stbi__load_and_postprocess_8bit(stbi__context * s, int * x, int * y, int * comp, int req_comp) { + stbi__result_info ri; + void * result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); + + if (result == NULL) + return NULL; + + // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. + STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); + + if (ri.bits_per_channel != 8) { + result = stbi__convert_16_to_8((stbi__uint16 *)result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 8; + } + + // @TODO: move stbi__convert_format to here + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); + } + + return (unsigned char *)result; +} + +static stbi__uint16 * stbi__load_and_postprocess_16bit(stbi__context * s, int * x, int * y, int * comp, int req_comp) { + stbi__result_info ri; + void * result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); + + if (result == NULL) + return NULL; + + // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. + STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); + + if (ri.bits_per_channel != 16) { + result = stbi__convert_8_to_16((stbi_uc *)result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 16; + } + + // @TODO: move stbi__convert_format16 to here + // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); + } + + return (stbi__uint16 *)result; +} + +#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR) +static void stbi__float_postprocess(float * result, int * x, int * y, int * comp, int req_comp) { + if (stbi__vertically_flip_on_load && result != NULL) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); + } +} +#endif + +#ifndef STBI_NO_STDIO + +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) +STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char * str, + int cbmb, wchar_t * widestr, int cchwide); +STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, + const wchar_t * widestr, int cchwide, char * str, int cbmb, + const char * defchar, int * used_default); +#endif + +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) +STBIDEF int stbi_convert_wchar_to_utf8(char * buffer, size_t bufferlen, const wchar_t * input) { + return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int)bufferlen, NULL, NULL); +} +#endif + +static FILE * stbi__fopen(char const * filename, char const * mode) { + FILE * f; +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename) / sizeof(*wFilename))) + return 0; + + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode) / sizeof(*wMode))) + return 0; + +#if defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != _wfopen_s(&f, wFilename, wMode)) + f = 0; +#else + f = _wfopen(wFilename, wMode); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f = 0; +#else + f = fopen(filename, mode); +#endif + return f; +} + +STBIDEF stbi_uc * stbi_load(char const * filename, int * x, int * y, int * comp, int req_comp) { + FILE * f = stbi__fopen(filename, "rb"); + unsigned char * result; + if (!f) + return stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f, x, y, comp, req_comp); + fclose(f); + return result; +} + +STBIDEF stbi_uc * stbi_load_from_file(FILE * f, int * x, int * y, int * comp, int req_comp) { + unsigned char * result; + stbi__context s; + stbi__start_file(&s, f); + result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi__uint16 * stbi_load_from_file_16(FILE * f, int * x, int * y, int * comp, int req_comp) { + stbi__uint16 * result; + stbi__context s; + stbi__start_file(&s, f); + result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi_us * stbi_load_16(char const * filename, int * x, int * y, int * comp, int req_comp) { + FILE * f = stbi__fopen(filename, "rb"); + stbi__uint16 * result; + if (!f) + return (stbi_us *)stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file_16(f, x, y, comp, req_comp); + fclose(f); + return result; +} + +#endif //! STBI_NO_STDIO + +STBIDEF stbi_us * stbi_load_16_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); +} + +STBIDEF stbi_us * stbi_load_16_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, + int * channels_in_file, int desired_channels) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); +} + +STBIDEF stbi_uc * stbi_load_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp, int req_comp) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); +} + +STBIDEF stbi_uc * stbi_load_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * comp, + int req_comp) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); +} + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc * stbi_load_gif_from_memory(stbi_uc const * buffer, int len, int ** delays, int * x, int * y, int * z, + int * comp, int req_comp) { + unsigned char * result; + stbi__context s; + stbi__start_mem(&s, buffer, len); + + result = (unsigned char *)stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); + if (stbi__vertically_flip_on_load) { + stbi__vertical_flip_slices(result, *x, *y, *z, *comp); + } + + return result; +} +#endif + +#ifndef STBI_NO_LINEAR +static float * stbi__loadf_main(stbi__context * s, int * x, int * y, int * comp, int req_comp) { + unsigned char * data; +#ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + stbi__result_info ri; + float * hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri); + if (hdr_data) + stbi__float_postprocess(hdr_data, x, y, comp, req_comp); + return hdr_data; + } +#endif + data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); + if (data) + return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); +} + +STBIDEF float * stbi_loadf_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp, int req_comp) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__loadf_main(&s, x, y, comp, req_comp); +} + +STBIDEF float * stbi_loadf_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * comp, + int req_comp) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__loadf_main(&s, x, y, comp, req_comp); +} + +#ifndef STBI_NO_STDIO +STBIDEF float * stbi_loadf(char const * filename, int * x, int * y, int * comp, int req_comp) { + float * result; + FILE * f = stbi__fopen(filename, "rb"); + if (!f) + return stbi__errpf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f, x, y, comp, req_comp); + fclose(f); + return result; +} + +STBIDEF float * stbi_loadf_from_file(FILE * f, int * x, int * y, int * comp, int req_comp) { + stbi__context s; + stbi__start_file(&s, f); + return stbi__loadf_main(&s, x, y, comp, req_comp); +} +#endif // !STBI_NO_STDIO + +#endif // !STBI_NO_LINEAR + +// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is +// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always +// reports false! + +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const * buffer, int len) { +#ifndef STBI_NO_HDR + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__hdr_test(&s); +#else + STBI_NOTUSED(buffer); + STBI_NOTUSED(len); + return 0; +#endif +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr(char const * filename) { + FILE * f = stbi__fopen(filename, "rb"); + int result = 0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +STBIDEF int stbi_is_hdr_from_file(FILE * f) { +#ifndef STBI_NO_HDR + long pos = ftell(f); + int res; + stbi__context s; + stbi__start_file(&s, f); + res = stbi__hdr_test(&s); + fseek(f, pos, SEEK_SET); + return res; +#else + STBI_NOTUSED(f); + return 0; +#endif +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const * clbk, void * user) { +#ifndef STBI_NO_HDR + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__hdr_test(&s); +#else + STBI_NOTUSED(clbk); + STBI_NOTUSED(user); + return 0; +#endif +} + +#ifndef STBI_NO_LINEAR +static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f; + +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } +STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } +#endif + +static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f; + +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1 / gamma; } +STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1 / scale; } + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum { STBI__SCAN_load = 0, STBI__SCAN_type, STBI__SCAN_header }; + +static void stbi__refill_buffer(stbi__context * s) { + int n = (s->io.read)(s->io_user_data, (char *)s->buffer_start, s->buflen); + s->callback_already_read += (int)(s->img_buffer - s->img_buffer_original); + if (n == 0) { + // at end of file, treat same as if from memory, but need to handle case + // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file + s->read_from_callbacks = 0; + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + 1; + *s->img_buffer = 0; + } else { + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + n; + } +} + +stbi_inline static stbi_uc stbi__get8(stbi__context * s) { + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + if (s->read_from_callbacks) { + stbi__refill_buffer(s); + return *s->img_buffer++; + } + return 0; +} + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +stbi_inline static int stbi__at_eof(stbi__context * s) { + if (s->io.read) { + if (!(s->io.eof)(s->io_user_data)) + return 0; + // if feof() is true, check if buffer = end + // special case: we've only got the special 0 character at the end + if (s->read_from_callbacks == 0) + return 1; + } + + return s->img_buffer >= s->img_buffer_end; +} +#endif + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && \ + defined(STBI_NO_GIF) && defined(STBI_NO_PIC) +// nothing +#else +static void stbi__skip(stbi__context * s, int n) { + if (n == 0) + return; // already there! + if (n < 0) { + s->img_buffer = s->img_buffer_end; + return; + } + if (s->io.read) { + int blen = (int)(s->img_buffer_end - s->img_buffer); + if (blen < n) { + s->img_buffer = s->img_buffer_end; + (s->io.skip)(s->io_user_data, n - blen); + return; + } + } + s->img_buffer += n; +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM) +// nothing +#else +static int stbi__getn(stbi__context * s, stbi_uc * buffer, int n) { + if (s->io.read) { + int blen = (int)(s->img_buffer_end - s->img_buffer); + if (blen < n) { + int res, count; + + memcpy(buffer, s->img_buffer, blen); + + count = (s->io.read)(s->io_user_data, (char *)buffer + blen, n - blen); + res = (count == (n - blen)); + s->img_buffer = s->img_buffer_end; + return res; + } + } + + if (s->img_buffer + n <= s->img_buffer_end) { + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; + return 1; + } else + return 0; +} +#endif + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) +// nothing +#else +static int stbi__get16be(stbi__context * s) { + int z = stbi__get8(s); + return (z << 8) + stbi__get8(s); +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) +// nothing +#else +static stbi__uint32 stbi__get32be(stbi__context * s) { + stbi__uint32 z = stbi__get16be(s); + return (z << 16) + stbi__get16be(s); +} +#endif + +#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) +// nothing +#else +static int stbi__get16le(stbi__context * s) { + int z = stbi__get8(s); + return z + (stbi__get8(s) << 8); +} +#endif + +#ifndef STBI_NO_BMP +static stbi__uint32 stbi__get32le(stbi__context * s) { + stbi__uint32 z = stbi__get16le(s); + z += (stbi__uint32)stbi__get16le(s) << 16; + return z; +} +#endif + +#define STBI__BYTECAST(x) ((stbi_uc)((x)&255)) // truncate int to byte without warnings + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && \ + defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static stbi_uc stbi__compute_y(int r, int g, int b) { return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8); } +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && \ + defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +static unsigned char * stbi__convert_format(unsigned char * data, int img_n, int req_comp, unsigned int x, unsigned int y) { + int i, j; + unsigned char * good; + + if (req_comp == img_n) + return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *)stbi__malloc_mad3(req_comp, x, y, 0); + if (good == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + + for (j = 0; j < (int)y; ++j) { + unsigned char * src = data + j * x * img_n; + unsigned char * dest = good + j * x * req_comp; + +#define STBI__COMBO(a, b) ((a)*8 + (b)) +#define STBI__CASE(a, b) \ + case STBI__COMBO(a, b): \ + for (i = x - 1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1, 2) { + dest[0] = src[0]; + dest[1] = 255; + } + break; + STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(1, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = 255; + } + break; + STBI__CASE(2, 1) { dest[0] = src[0]; } + break; + STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(2, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = src[1]; + } + break; + STBI__CASE(3, 4) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + dest[3] = 255; + } + break; + STBI__CASE(3, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } + break; + STBI__CASE(3, 2) { + dest[0] = stbi__compute_y(src[0], src[1], src[2]); + dest[1] = 255; + } + break; + STBI__CASE(4, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } + break; + STBI__CASE(4, 2) { + dest[0] = stbi__compute_y(src[0], src[1], src[2]); + dest[1] = src[3]; + } + break; + STBI__CASE(4, 3) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + } + break; + default: + STBI_ASSERT(0); + STBI_FREE(data); + STBI_FREE(good); + return stbi__errpuc("unsupported", "Unsupported format conversion"); + } +#undef STBI__CASE + } + + STBI_FREE(data); + return good; +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) +// nothing +#else +static stbi__uint16 stbi__compute_y_16(int r, int g, int b) { return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); } +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) +// nothing +#else +static stbi__uint16 * stbi__convert_format16(stbi__uint16 * data, int img_n, int req_comp, unsigned int x, unsigned int y) { + int i, j; + stbi__uint16 * good; + + if (req_comp == img_n) + return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (stbi__uint16 *)stbi__malloc(req_comp * x * y * 2); + if (good == NULL) { + STBI_FREE(data); + return (stbi__uint16 *)stbi__errpuc("outofmem", "Out of memory"); + } + + for (j = 0; j < (int)y; ++j) { + stbi__uint16 * src = data + j * x * img_n; + stbi__uint16 * dest = good + j * x * req_comp; + +#define STBI__COMBO(a, b) ((a)*8 + (b)) +#define STBI__CASE(a, b) \ + case STBI__COMBO(a, b): \ + for (i = x - 1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1, 2) { + dest[0] = src[0]; + dest[1] = 0xffff; + } + break; + STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(1, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = 0xffff; + } + break; + STBI__CASE(2, 1) { dest[0] = src[0]; } + break; + STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(2, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = src[1]; + } + break; + STBI__CASE(3, 4) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + dest[3] = 0xffff; + } + break; + STBI__CASE(3, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } + break; + STBI__CASE(3, 2) { + dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); + dest[1] = 0xffff; + } + break; + STBI__CASE(4, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } + break; + STBI__CASE(4, 2) { + dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); + dest[1] = src[3]; + } + break; + STBI__CASE(4, 3) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + } + break; + default: + STBI_ASSERT(0); + STBI_FREE(data); + STBI_FREE(good); + return (stbi__uint16 *)stbi__errpuc("unsupported", "Unsupported format conversion"); + } +#undef STBI__CASE + } + + STBI_FREE(data); + return good; +} +#endif + +#ifndef STBI_NO_LINEAR +static float * stbi__ldr_to_hdr(stbi_uc * data, int x, int y, int comp) { + int i, k, n; + float * output; + if (!data) + return NULL; + output = (float *)stbi__malloc_mad4(x, y, comp, sizeof(float), 0); + if (output == NULL) { + STBI_FREE(data); + return stbi__errpf("outofmem", "Out of memory"); + } + // compute number of non-alpha components + if (comp & 1) + n = comp; + else + n = comp - 1; + for (i = 0; i < x * y; ++i) { + for (k = 0; k < n; ++k) { + output[i * comp + k] = (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) * stbi__l2h_scale); + } + } + if (n < comp) { + for (i = 0; i < x * y; ++i) { + output[i * comp + n] = data[i * comp + n] / 255.0f; + } + } + STBI_FREE(data); + return output; +} +#endif + +#ifndef STBI_NO_HDR +#define stbi__float2int(x) ((int)(x)) +static stbi_uc * stbi__hdr_to_ldr(float * data, int x, int y, int comp) { + int i, k, n; + stbi_uc * output; + if (!data) + return NULL; + output = (stbi_uc *)stbi__malloc_mad3(x, y, comp, 0); + if (output == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + // compute number of non-alpha components + if (comp & 1) + n = comp; + else + n = comp - 1; + for (i = 0; i < x * y; ++i) { + for (k = 0; k < n; ++k) { + float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; + if (z < 0) + z = 0; + if (z > 255) + z = 255; + output[i * comp + k] = (stbi_uc)stbi__float2int(z); + } + if (k < comp) { + float z = data[i * comp + k] * 255 + 0.5f; + if (z < 0) + z = 0; + if (z > 255) + z = 255; + output[i * comp + k] = (stbi_uc)stbi__float2int(z); + } + } + STBI_FREE(data); + return output; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// "baseline" JPEG/JFIF decoder +// +// simple implementation +// - doesn't support delayed output of y-dimension +// - simple interface (only one output format: 8-bit interleaved RGB) +// - doesn't try to recover corrupt jpegs +// - doesn't allow partial loading, loading multiple at once +// - still fast on x86 (copying globals into locals doesn't help x86) +// - allocates lots of intermediate memory (full size of all components) +// - non-interleaved case requires this anyway +// - allows good upsampling (see next) +// high-quality +// - upsampled channels are bilinearly interpolated, even across blocks +// - quality integer IDCT derived from IJG's 'slow' +// performance +// - fast huffman; reasonable integer IDCT +// - some SIMD kernels for common paths on targets with SSE2/NEON +// - uses a lot of intermediate memory, could cache poorly + +#ifndef STBI_NO_JPEG + +// huffman decoding acceleration +#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache + +typedef struct { + stbi_uc fast[1 << FAST_BITS]; + // weirdly, repacking this into AoS is a 10% speed loss, instead of a win + stbi__uint16 code[256]; + stbi_uc values[256]; + stbi_uc size[257]; + unsigned int maxcode[18]; + int delta[17]; // old 'firstsymbol' - old 'firstcode' +} stbi__huffman; + +typedef struct { + stbi__context * s; + stbi__huffman huff_dc[4]; + stbi__huffman huff_ac[4]; + stbi__uint16 dequant[4][64]; + stbi__int16 fast_ac[4][1 << FAST_BITS]; + + // sizes for components, interleaved MCUs + int img_h_max, img_v_max; + int img_mcu_x, img_mcu_y; + int img_mcu_w, img_mcu_h; + + // definition of jpeg image component + struct { + int id; + int h, v; + int tq; + int hd, ha; + int dc_pred; + + int x, y, w2, h2; + stbi_uc * data; + void *raw_data, *raw_coeff; + stbi_uc * linebuf; + short * coeff; // progressive only + int coeff_w, coeff_h; // number of 8x8 coefficient blocks + } img_comp[4]; + + stbi__uint32 code_buffer; // jpeg entropy-coded buffer + int code_bits; // number of valid bits + unsigned char marker; // marker seen while filling entropy buffer + int nomore; // flag if we saw a marker so must stop + + int progressive; + int spec_start; + int spec_end; + int succ_high; + int succ_low; + int eob_run; + int jfif; + int app14_color_transform; // Adobe APP14 tag + int rgb; + + int scan_n, order[4]; + int restart_interval, todo; + + // kernels + void (*idct_block_kernel)(stbi_uc * out, int out_stride, short data[64]); + void (*YCbCr_to_RGB_kernel)(stbi_uc * out, const stbi_uc * y, const stbi_uc * pcb, const stbi_uc * pcr, int count, + int step); + stbi_uc * (*resample_row_hv_2_kernel)(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs); +} stbi__jpeg; + +static int stbi__build_huffman(stbi__huffman * h, int * count) { + int i, j, k = 0; + unsigned int code; + // build size list for each symbol (from JPEG spec) + for (i = 0; i < 16; ++i) { + for (j = 0; j < count[i]; ++j) { + h->size[k++] = (stbi_uc)(i + 1); + if (k >= 257) + return stbi__err("bad size list", "Corrupt JPEG"); + } + } + h->size[k] = 0; + + // compute actual symbols (from jpeg spec) + code = 0; + k = 0; + for (j = 1; j <= 16; ++j) { + // compute delta to add to code to compute symbol id + h->delta[j] = k - code; + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (stbi__uint16)(code++); + if (code - 1 >= (1u << j)) + return stbi__err("bad code lengths", "Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16 - j); + code <<= 1; + } + h->maxcode[j] = 0xffffffff; + + // build non-spec acceleration table; 255 is flag for not-accelerated + memset(h->fast, 255, 1 << FAST_BITS); + for (i = 0; i < k; ++i) { + int s = h->size[i]; + if (s <= FAST_BITS) { + int c = h->code[i] << (FAST_BITS - s); + int m = 1 << (FAST_BITS - s); + for (j = 0; j < m; ++j) { + h->fast[c + j] = (stbi_uc)i; + } + } + } + return 1; +} + +// build a table that decodes both magnitude and value of small ACs in +// one go. +static void stbi__build_fast_ac(stbi__int16 * fast_ac, stbi__huffman * h) { + int i; + for (i = 0; i < (1 << FAST_BITS); ++i) { + stbi_uc fast = h->fast[i]; + fast_ac[i] = 0; + if (fast < 255) { + int rs = h->values[fast]; + int run = (rs >> 4) & 15; + int magbits = rs & 15; + int len = h->size[fast]; + + if (magbits && len + magbits <= FAST_BITS) { + // magnitude code followed by receive_extend code + int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); + int m = 1 << (magbits - 1); + if (k < m) + k += (~0U << magbits) + 1; + // if the result is small enough, we can fit it in fast_ac table + if (k >= -128 && k <= 127) + fast_ac[i] = (stbi__int16)((k * 256) + (run * 16) + (len + magbits)); + } + } + } +} + +static void stbi__grow_buffer_unsafe(stbi__jpeg * j) { + do { + unsigned int b = j->nomore ? 0 : stbi__get8(j->s); + if (b == 0xff) { + int c = stbi__get8(j->s); + while (c == 0xff) + c = stbi__get8(j->s); // consume fill bytes + if (c != 0) { + j->marker = (unsigned char)c; + j->nomore = 1; + return; + } + } + j->code_buffer |= b << (24 - j->code_bits); + j->code_bits += 8; + } while (j->code_bits <= 24); +} + +// (1 << n) - 1 +static const stbi__uint32 stbi__bmask[17] = {0, 1, 3, 7, 15, 31, 63, 127, 255, + 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535}; + +// decode a jpeg huffman value from the bitstream +stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg * j, stbi__huffman * h) { + unsigned int temp; + int c, k; + + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + + // look at the top FAST_BITS and determine what symbol ID it is, + // if the code is <= FAST_BITS + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); + k = h->fast[c]; + if (k < 255) { + int s = h->size[k]; + if (s > j->code_bits) + return -1; + j->code_buffer <<= s; + j->code_bits -= s; + return h->values[k]; + } + + // naive test is to shift the code_buffer down so k bits are + // valid, then test against maxcode. To speed this up, we've + // preshifted maxcode left so that it has (16-k) 0s at the + // end; in other words, regardless of the number of bits, it + // wants to be compared against something shifted to have 16; + // that way we don't need to shift inside the loop. + temp = j->code_buffer >> 16; + for (k = FAST_BITS + 1;; ++k) + if (temp < h->maxcode[k]) + break; + if (k == 17) { + // error! code not found + j->code_bits -= 16; + return -1; + } + + if (k > j->code_bits) + return -1; + + // convert the huffman code to the symbol id + c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; + if (c < 0 || c >= 256) // symbol id out of bounds! + return -1; + STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); + + // convert the id to a symbol + j->code_bits -= k; + j->code_buffer <<= k; + return h->values[c]; +} + +// bias[n] = (-1<code_bits < n) + stbi__grow_buffer_unsafe(j); + if (j->code_bits < n) + return 0; // ran out of bits from stream, return 0s intead of continuing + + sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative) + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k + (stbi__jbias[n] & (sgn - 1)); +} + +// get some unsigned bits +stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg * j, int n) { + unsigned int k; + if (j->code_bits < n) + stbi__grow_buffer_unsafe(j); + if (j->code_bits < n) + return 0; // ran out of bits from stream, return 0s intead of continuing + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k; +} + +stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg * j) { + unsigned int k; + if (j->code_bits < 1) + stbi__grow_buffer_unsafe(j); + if (j->code_bits < 1) + return 0; // ran out of bits from stream, return 0s intead of continuing + k = j->code_buffer; + j->code_buffer <<= 1; + --j->code_bits; + return k & 0x80000000; +} + +// given a value that's at position X in the zigzag stream, +// where does it appear in the 8x8 matrix coded as row-major? +static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = { + 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35, + 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63, + // let corrupt input sample past end + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63}; + +// decode one 64-entry block-- +static int stbi__jpeg_decode_block(stbi__jpeg * j, short data[64], stbi__huffman * hdc, stbi__huffman * hac, stbi__int16 * fac, + int b, stbi__uint16 * dequant) { + int diff, dc, k; + int t; + + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0 || t > 15) + return stbi__err("bad huffman code", "Corrupt JPEG"); + + // 0 all the ac values now so we can do it 32-bits at a time + memset(data, 0, 64 * sizeof(data[0])); + + diff = t ? stbi__extend_receive(j, t) : 0; + if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) + return stbi__err("bad delta", "Corrupt JPEG"); + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + if (!stbi__mul2shorts_valid(dc, dequant[0])) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + data[0] = (short)(dc * dequant[0]); + + // decode AC components, see JPEG spec + k = 1; + do { + unsigned int zig; + int c, r, s; + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + if (s > j->code_bits) + return stbi__err("bad huffman code", "Combined length longer than code bits available"); + j->code_buffer <<= s; + j->code_bits -= s; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)((r >> 8) * dequant[zig]); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) + return stbi__err("bad huffman code", "Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (rs != 0xf0) + break; // end block + k += 16; + } else { + k += r; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]); + } + } + } while (k < 64); + return 1; +} + +static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg * j, short data[64], stbi__huffman * hdc, int b) { + int diff, dc; + int t; + if (j->spec_end != 0) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + + if (j->succ_high == 0) { + // first scan for DC coefficient, must be first + memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0 || t > 15) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + diff = t ? stbi__extend_receive(j, t) : 0; + + if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) + return stbi__err("bad delta", "Corrupt JPEG"); + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + if (!stbi__mul2shorts_valid(dc, 1 << j->succ_low)) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + data[0] = (short)(dc * (1 << j->succ_low)); + } else { + // refinement scan for DC coefficient + if (stbi__jpeg_get_bit(j)) + data[0] += (short)(1 << j->succ_low); + } + return 1; +} + +// @OPTIMIZE: store non-zigzagged during the decode passes, +// and only de-zigzag when dequantizing +static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg * j, short data[64], stbi__huffman * hac, stbi__int16 * fac) { + int k; + if (j->spec_start == 0) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->succ_high == 0) { + int shift = j->succ_low; + + if (j->eob_run) { + --j->eob_run; + return 1; + } + + k = j->spec_start; + do { + unsigned int zig; + int c, r, s; + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + if (s > j->code_bits) + return stbi__err("bad huffman code", "Combined length longer than code bits available"); + j->code_buffer <<= s; + j->code_bits -= s; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)((r >> 8) * (1 << shift)); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) + return stbi__err("bad huffman code", "Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r); + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + --j->eob_run; + break; + } + k += 16; + } else { + k += r; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)(stbi__extend_receive(j, s) * (1 << shift)); + } + } + } while (k <= j->spec_end); + } else { + // refinement scan for these AC coefficients + + short bit = (short)(1 << j->succ_low); + + if (j->eob_run) { + --j->eob_run; + for (k = j->spec_start; k <= j->spec_end; ++k) { + short * p = &data[stbi__jpeg_dezigzag[k]]; + if (*p != 0) + if (stbi__jpeg_get_bit(j)) + if ((*p & bit) == 0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } + } else { + k = j->spec_start; + do { + int r, s; + int rs = stbi__jpeg_huff_decode( + j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh + if (rs < 0) + return stbi__err("bad huffman code", "Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r) - 1; + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + r = 64; // force end of block + } else { + // r=15 s=0 should write 16 0s, so we just do + // a run of 15 0s and then write s (which is 0), + // so we don't have to do anything special here + } + } else { + if (s != 1) + return stbi__err("bad huffman code", "Corrupt JPEG"); + // sign bit + if (stbi__jpeg_get_bit(j)) + s = bit; + else + s = -bit; + } + + // advance by r + while (k <= j->spec_end) { + short * p = &data[stbi__jpeg_dezigzag[k++]]; + if (*p != 0) { + if (stbi__jpeg_get_bit(j)) + if ((*p & bit) == 0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } else { + if (r == 0) { + *p = (short)s; + break; + } + --r; + } + } + } while (k <= j->spec_end); + } + } + return 1; +} + +// take a -128..127 value and stbi__clamp it and convert to 0..255 +stbi_inline static stbi_uc stbi__clamp(int x) { + // trick to use a single test to catch both cases + if ((unsigned int)x > 255) { + if (x < 0) + return 0; + if (x > 255) + return 255; + } + return (stbi_uc)x; +} + +#define stbi__f2f(x) ((int)(((x)*4096 + 0.5))) +#define stbi__fsh(x) ((x)*4096) + +// derived from jidctint -- DCT_ISLOW +#define STBI__IDCT_1D(s0, s1, s2, s3, s4, s5, s6, s7) \ + int t0, t1, t2, t3, p1, p2, p3, p4, p5, x0, x1, x2, x3; \ + p2 = s2; \ + p3 = s6; \ + p1 = (p2 + p3) * stbi__f2f(0.5411961f); \ + t2 = p1 + p3 * stbi__f2f(-1.847759065f); \ + t3 = p1 + p2 * stbi__f2f(0.765366865f); \ + p2 = s0; \ + p3 = s4; \ + t0 = stbi__fsh(p2 + p3); \ + t1 = stbi__fsh(p2 - p3); \ + x0 = t0 + t3; \ + x3 = t0 - t3; \ + x1 = t1 + t2; \ + x2 = t1 - t2; \ + t0 = s7; \ + t1 = s5; \ + t2 = s3; \ + t3 = s1; \ + p3 = t0 + t2; \ + p4 = t1 + t3; \ + p1 = t0 + t3; \ + p2 = t1 + t2; \ + p5 = (p3 + p4) * stbi__f2f(1.175875602f); \ + t0 = t0 * stbi__f2f(0.298631336f); \ + t1 = t1 * stbi__f2f(2.053119869f); \ + t2 = t2 * stbi__f2f(3.072711026f); \ + t3 = t3 * stbi__f2f(1.501321110f); \ + p1 = p5 + p1 * stbi__f2f(-0.899976223f); \ + p2 = p5 + p2 * stbi__f2f(-2.562915447f); \ + p3 = p3 * stbi__f2f(-1.961570560f); \ + p4 = p4 * stbi__f2f(-0.390180644f); \ + t3 += p1 + p4; \ + t2 += p2 + p3; \ + t1 += p2 + p4; \ + t0 += p1 + p3; + +static void stbi__idct_block(stbi_uc * out, int out_stride, short data[64]) { + int i, val[64], *v = val; + stbi_uc * o; + short * d = data; + + // columns + for (i = 0; i < 8; ++i, ++d, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 && d[40] == 0 && d[48] == 0 && d[56] == 0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0] * 4; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; + x1 += 512; + x2 += 512; + x3 += 512; + v[0] = (x0 + t3) >> 10; + v[56] = (x0 - t3) >> 10; + v[8] = (x1 + t2) >> 10; + v[48] = (x1 - t2) >> 10; + v[16] = (x2 + t1) >> 10; + v[40] = (x2 - t1) >> 10; + v[24] = (x3 + t0) >> 10; + v[32] = (x3 - t0) >> 10; + } + } + + for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) { + // no fast case since the first 1D IDCT spread components out + STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + // so we want to round that, which means adding 0.5 * 1<<17, + // aka 65536. Also, we'll end up with -128 to 127 that we want + // to encode as 0..255 by adding 128, so we'll add that before the shift + x0 += 65536 + (128 << 17); + x1 += 65536 + (128 << 17); + x2 += 65536 + (128 << 17); + x3 += 65536 + (128 << 17); + // tried computing the shifts into temps, or'ing the temps to see + // if any were out of range, but that was slower + o[0] = stbi__clamp((x0 + t3) >> 17); + o[7] = stbi__clamp((x0 - t3) >> 17); + o[1] = stbi__clamp((x1 + t2) >> 17); + o[6] = stbi__clamp((x1 - t2) >> 17); + o[2] = stbi__clamp((x2 + t1) >> 17); + o[5] = stbi__clamp((x2 - t1) >> 17); + o[3] = stbi__clamp((x3 + t0) >> 17); + o[4] = stbi__clamp((x3 - t0) >> 17); + } +} + +#ifdef STBI_SSE2 +// sse2 integer IDCT. not the fastest possible implementation but it +// produces bit-identical results to the generic C version so it's +// fully "transparent". +static void stbi__idct_simd(stbi_uc * out, int out_stride, short data[64]) { + // This is constructed to match our regular (generic) integer IDCT exactly. + __m128i row0, row1, row2, row3, row4, row5, row6, row7; + __m128i tmp; + +// dot product constant: even elems=x, odd elems=y +#define dct_const(x, y) _mm_setr_epi16((x), (y), (x), (y), (x), (y), (x), (y)) + +// out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) +// out(1) = c1[even]*x + c1[odd]*y +#define dct_rot(out0, out1, x, y, c0, c1) \ + __m128i c0##lo = _mm_unpacklo_epi16((x), (y)); \ + __m128i c0##hi = _mm_unpackhi_epi16((x), (y)); \ + __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ + __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ + __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ + __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) + +// out = in << 12 (in 16-bit, out 32-bit) +#define dct_widen(out, in) \ + __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ + __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) + +// wide add +#define dct_wadd(out, a, b) \ + __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_add_epi32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) + +// butterfly a/b, add bias, then shift by "s" and pack +#define dct_bfly32o(out0, out1, a, b, bias, s) \ + { \ + __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ + __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ + dct_wadd(sum, abiased, b); \ + dct_wsub(dif, abiased, b); \ + out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ + out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ + } + +// 8-bit interleave step (for transposes) +#define dct_interleave8(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi8(a, b); \ + b = _mm_unpackhi_epi8(tmp, b) + +// 16-bit interleave step (for transposes) +#define dct_interleave16(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi16(a, b); \ + b = _mm_unpackhi_epi16(tmp, b) + +#define dct_pass(bias, shift) \ + { \ + /* even part */ \ + dct_rot(t2e, t3e, row2, row6, rot0_0, rot0_1); \ + __m128i sum04 = _mm_add_epi16(row0, row4); \ + __m128i dif04 = _mm_sub_epi16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + dct_rot(y0o, y2o, row7, row3, rot2_0, rot2_1); \ + dct_rot(y1o, y3o, row5, row1, rot3_0, rot3_1); \ + __m128i sum17 = _mm_add_epi16(row1, row7); \ + __m128i sum35 = _mm_add_epi16(row3, row5); \ + dct_rot(y4o, y5o, sum17, sum35, rot1_0, rot1_1); \ + dct_wadd(x4, y0o, y4o); \ + dct_wadd(x5, y1o, y5o); \ + dct_wadd(x6, y2o, y5o); \ + dct_wadd(x7, y3o, y4o); \ + dct_bfly32o(row0, row7, x0, x7, bias, shift); \ + dct_bfly32o(row1, row6, x1, x6, bias, shift); \ + dct_bfly32o(row2, row5, x2, x5, bias, shift); \ + dct_bfly32o(row3, row4, x3, x4, bias, shift); \ + } + + __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); + __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f), stbi__f2f(0.5411961f)); + __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); + __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); + __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f), stbi__f2f(-1.961570560f)); + __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f)); + __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f), stbi__f2f(-0.390180644f)); + __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f)); + + // rounding biases in column/row passes, see stbi__idct_block for explanation. + __m128i bias_0 = _mm_set1_epi32(512); + __m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17)); + + // load + row0 = _mm_load_si128((const __m128i *)(data + 0 * 8)); + row1 = _mm_load_si128((const __m128i *)(data + 1 * 8)); + row2 = _mm_load_si128((const __m128i *)(data + 2 * 8)); + row3 = _mm_load_si128((const __m128i *)(data + 3 * 8)); + row4 = _mm_load_si128((const __m128i *)(data + 4 * 8)); + row5 = _mm_load_si128((const __m128i *)(data + 5 * 8)); + row6 = _mm_load_si128((const __m128i *)(data + 6 * 8)); + row7 = _mm_load_si128((const __m128i *)(data + 7 * 8)); + + // column pass + dct_pass(bias_0, 10); + + { + // 16bit 8x8 transpose pass 1 + dct_interleave16(row0, row4); + dct_interleave16(row1, row5); + dct_interleave16(row2, row6); + dct_interleave16(row3, row7); + + // transpose pass 2 + dct_interleave16(row0, row2); + dct_interleave16(row1, row3); + dct_interleave16(row4, row6); + dct_interleave16(row5, row7); + + // transpose pass 3 + dct_interleave16(row0, row1); + dct_interleave16(row2, row3); + dct_interleave16(row4, row5); + dct_interleave16(row6, row7); + } + + // row pass + dct_pass(bias_1, 17); + + { + // pack + __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 + __m128i p1 = _mm_packus_epi16(row2, row3); + __m128i p2 = _mm_packus_epi16(row4, row5); + __m128i p3 = _mm_packus_epi16(row6, row7); + + // 8bit 8x8 transpose pass 1 + dct_interleave8(p0, p2); // a0e0a1e1... + dct_interleave8(p1, p3); // c0g0c1g1... + + // transpose pass 2 + dct_interleave8(p0, p1); // a0c0e0g0... + dct_interleave8(p2, p3); // b0d0f0h0... + + // transpose pass 3 + dct_interleave8(p0, p2); // a0b0c0d0... + dct_interleave8(p1, p3); // a4b4c4d4... + + // store + _mm_storel_epi64((__m128i *)out, p0); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p0, 0x4e)); + out += out_stride; + _mm_storel_epi64((__m128i *)out, p2); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p2, 0x4e)); + out += out_stride; + _mm_storel_epi64((__m128i *)out, p1); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p1, 0x4e)); + out += out_stride; + _mm_storel_epi64((__m128i *)out, p3); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p3, 0x4e)); + } + +#undef dct_const +#undef dct_rot +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_interleave8 +#undef dct_interleave16 +#undef dct_pass +} + +#endif // STBI_SSE2 + +#ifdef STBI_NEON + +// NEON integer IDCT. should produce bit-identical +// results to the generic C version. +static void stbi__idct_simd(stbi_uc * out, int out_stride, short data[64]) { + int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; + + int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); + int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); + int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f)); + int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f)); + int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); + int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); + int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); + int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); + int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f)); + int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f)); + int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f)); + int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f)); + +#define dct_long_mul(out, inq, coeff) \ + int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) + +#define dct_long_mac(out, acc, inq, coeff) \ + int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) + +#define dct_widen(out, inq) \ + int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ + int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) + +// wide add +#define dct_wadd(out, a, b) \ + int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vaddq_s32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vsubq_s32(a##_h, b##_h) + +// butterfly a/b, then shift using "shiftop" by "s" and pack +#define dct_bfly32o(out0, out1, a, b, shiftop, s) \ + { \ + dct_wadd(sum, a, b); \ + dct_wsub(dif, a, b); \ + out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ + out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ + } + +#define dct_pass(shiftop, shift) \ + { \ + /* even part */ \ + int16x8_t sum26 = vaddq_s16(row2, row6); \ + dct_long_mul(p1e, sum26, rot0_0); \ + dct_long_mac(t2e, p1e, row6, rot0_1); \ + dct_long_mac(t3e, p1e, row2, rot0_2); \ + int16x8_t sum04 = vaddq_s16(row0, row4); \ + int16x8_t dif04 = vsubq_s16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + int16x8_t sum15 = vaddq_s16(row1, row5); \ + int16x8_t sum17 = vaddq_s16(row1, row7); \ + int16x8_t sum35 = vaddq_s16(row3, row5); \ + int16x8_t sum37 = vaddq_s16(row3, row7); \ + int16x8_t sumodd = vaddq_s16(sum17, sum35); \ + dct_long_mul(p5o, sumodd, rot1_0); \ + dct_long_mac(p1o, p5o, sum17, rot1_1); \ + dct_long_mac(p2o, p5o, sum35, rot1_2); \ + dct_long_mul(p3o, sum37, rot2_0); \ + dct_long_mul(p4o, sum15, rot2_1); \ + dct_wadd(sump13o, p1o, p3o); \ + dct_wadd(sump24o, p2o, p4o); \ + dct_wadd(sump23o, p2o, p3o); \ + dct_wadd(sump14o, p1o, p4o); \ + dct_long_mac(x4, sump13o, row7, rot3_0); \ + dct_long_mac(x5, sump24o, row5, rot3_1); \ + dct_long_mac(x6, sump23o, row3, rot3_2); \ + dct_long_mac(x7, sump14o, row1, rot3_3); \ + dct_bfly32o(row0, row7, x0, x7, shiftop, shift); \ + dct_bfly32o(row1, row6, x1, x6, shiftop, shift); \ + dct_bfly32o(row2, row5, x2, x5, shiftop, shift); \ + dct_bfly32o(row3, row4, x3, x4, shiftop, shift); \ + } + + // load + row0 = vld1q_s16(data + 0 * 8); + row1 = vld1q_s16(data + 1 * 8); + row2 = vld1q_s16(data + 2 * 8); + row3 = vld1q_s16(data + 3 * 8); + row4 = vld1q_s16(data + 4 * 8); + row5 = vld1q_s16(data + 5 * 8); + row6 = vld1q_s16(data + 6 * 8); + row7 = vld1q_s16(data + 7 * 8); + + // add DC bias + row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); + + // column pass + dct_pass(vrshrn_n_s32, 10); + + // 16bit 8x8 transpose + { +// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. +// whether compilers actually get this is another story, sadly. +#define dct_trn16(x, y) \ + { \ + int16x8x2_t t = vtrnq_s16(x, y); \ + x = t.val[0]; \ + y = t.val[1]; \ + } +#define dct_trn32(x, y) \ + { \ + int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); \ + x = vreinterpretq_s16_s32(t.val[0]); \ + y = vreinterpretq_s16_s32(t.val[1]); \ + } +#define dct_trn64(x, y) \ + { \ + int16x8_t x0 = x; \ + int16x8_t y0 = y; \ + x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); \ + y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); \ + } + + // pass 1 + dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 + dct_trn16(row2, row3); + dct_trn16(row4, row5); + dct_trn16(row6, row7); + + // pass 2 + dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 + dct_trn32(row1, row3); + dct_trn32(row4, row6); + dct_trn32(row5, row7); + + // pass 3 + dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 + dct_trn64(row1, row5); + dct_trn64(row2, row6); + dct_trn64(row3, row7); + +#undef dct_trn16 +#undef dct_trn32 +#undef dct_trn64 + } + + // row pass + // vrshrn_n_s32 only supports shifts up to 16, we need + // 17. so do a non-rounding shift of 16 first then follow + // up with a rounding shift by 1. + dct_pass(vshrn_n_s32, 16); + + { + // pack and round + uint8x8_t p0 = vqrshrun_n_s16(row0, 1); + uint8x8_t p1 = vqrshrun_n_s16(row1, 1); + uint8x8_t p2 = vqrshrun_n_s16(row2, 1); + uint8x8_t p3 = vqrshrun_n_s16(row3, 1); + uint8x8_t p4 = vqrshrun_n_s16(row4, 1); + uint8x8_t p5 = vqrshrun_n_s16(row5, 1); + uint8x8_t p6 = vqrshrun_n_s16(row6, 1); + uint8x8_t p7 = vqrshrun_n_s16(row7, 1); + + // again, these can translate into one instruction, but often don't. +#define dct_trn8_8(x, y) \ + { \ + uint8x8x2_t t = vtrn_u8(x, y); \ + x = t.val[0]; \ + y = t.val[1]; \ + } +#define dct_trn8_16(x, y) \ + { \ + uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); \ + x = vreinterpret_u8_u16(t.val[0]); \ + y = vreinterpret_u8_u16(t.val[1]); \ + } +#define dct_trn8_32(x, y) \ + { \ + uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); \ + x = vreinterpret_u8_u32(t.val[0]); \ + y = vreinterpret_u8_u32(t.val[1]); \ + } + + // sadly can't use interleaved stores here since we only write + // 8 bytes to each scan line! + + // 8x8 8-bit transpose pass 1 + dct_trn8_8(p0, p1); + dct_trn8_8(p2, p3); + dct_trn8_8(p4, p5); + dct_trn8_8(p6, p7); + + // pass 2 + dct_trn8_16(p0, p2); + dct_trn8_16(p1, p3); + dct_trn8_16(p4, p6); + dct_trn8_16(p5, p7); + + // pass 3 + dct_trn8_32(p0, p4); + dct_trn8_32(p1, p5); + dct_trn8_32(p2, p6); + dct_trn8_32(p3, p7); + + // store + vst1_u8(out, p0); + out += out_stride; + vst1_u8(out, p1); + out += out_stride; + vst1_u8(out, p2); + out += out_stride; + vst1_u8(out, p3); + out += out_stride; + vst1_u8(out, p4); + out += out_stride; + vst1_u8(out, p5); + out += out_stride; + vst1_u8(out, p6); + out += out_stride; + vst1_u8(out, p7); + +#undef dct_trn8_8 +#undef dct_trn8_16 +#undef dct_trn8_32 + } + +#undef dct_long_mul +#undef dct_long_mac +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_pass +} + +#endif // STBI_NEON + +#define STBI__MARKER_none 0xff +// if there's a pending marker from the entropy stream, return that +// otherwise, fetch from the stream and get a marker. if there's no +// marker, return 0xff, which is never a valid marker value +static stbi_uc stbi__get_marker(stbi__jpeg * j) { + stbi_uc x; + if (j->marker != STBI__MARKER_none) { + x = j->marker; + j->marker = STBI__MARKER_none; + return x; + } + x = stbi__get8(j->s); + if (x != 0xff) + return STBI__MARKER_none; + while (x == 0xff) + x = stbi__get8(j->s); // consume repeated 0xff fill bytes + return x; +} + +// in each scan, we'll have scan_n components, and the order +// of the components is specified by order[] +#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) + +// after a restart interval, stbi__jpeg_reset the entropy decoder and +// the dc prediction +static void stbi__jpeg_reset(stbi__jpeg * j) { + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; + j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; + j->marker = STBI__MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + j->eob_run = 0; + // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, + // since we don't even allow 1<<30 pixels +} + +static int stbi__parse_entropy_coded_data(stbi__jpeg * z) { + stbi__jpeg_reset(z); + if (!z->progressive) { + if (z->scan_n == 1) { + int i, j; + STBI_SIMD_ALIGN(short, data[64]); + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x + 7) >> 3; + int h = (z->img_comp[n].y + 7) >> 3; + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, + z->dequant[z->img_comp[n].tq])) + return 0; + z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i, j, k, x, y; + STBI_SIMD_ALIGN(short, data[64]); + for (j = 0; j < z->img_mcu_y; ++j) { + for (i = 0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k = 0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y = 0; y < z->img_comp[n].v; ++y) { + for (x = 0; x < z->img_comp[n].h; ++x) { + int x2 = (i * z->img_comp[n].h + x) * 8; + int y2 = (j * z->img_comp[n].v + y) * 8; + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, + z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) + return 0; + z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * y2 + x2, z->img_comp[n].w2, + data); + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } else { + if (z->scan_n == 1) { + int i, j; + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x + 7) >> 3; + int h = (z->img_comp[n].y + 7) >> 3; + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + short * data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + if (z->spec_start == 0) { + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } else { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) + return 0; + } + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i, j, k, x, y; + for (j = 0; j < z->img_mcu_y; ++j) { + for (i = 0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k = 0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y = 0; y < z->img_comp[n].v; ++y) { + for (x = 0; x < z->img_comp[n].h; ++x) { + int x2 = (i * z->img_comp[n].h + x); + int y2 = (j * z->img_comp[n].v + y); + short * data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } +} + +static void stbi__jpeg_dequantize(short * data, stbi__uint16 * dequant) { + int i; + for (i = 0; i < 64; ++i) + data[i] *= dequant[i]; +} + +static void stbi__jpeg_finish(stbi__jpeg * z) { + if (z->progressive) { + // dequantize and idct the data + int i, j, n; + for (n = 0; n < z->s->img_n; ++n) { + int w = (z->img_comp[n].x + 7) >> 3; + int h = (z->img_comp[n].y + 7) >> 3; + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + short * data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); + z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); + } + } + } + } +} + +static int stbi__process_marker(stbi__jpeg * z, int m) { + int L; + switch (m) { + case STBI__MARKER_none: // no marker found + return stbi__err("expected marker", "Corrupt JPEG"); + + case 0xDD: // DRI - specify restart interval + if (stbi__get16be(z->s) != 4) + return stbi__err("bad DRI len", "Corrupt JPEG"); + z->restart_interval = stbi__get16be(z->s); + return 1; + + case 0xDB: // DQT - define quantization table + L = stbi__get16be(z->s) - 2; + while (L > 0) { + int q = stbi__get8(z->s); + int p = q >> 4, sixteen = (p != 0); + int t = q & 15, i; + if (p != 0 && p != 1) + return stbi__err("bad DQT type", "Corrupt JPEG"); + if (t > 3) + return stbi__err("bad DQT table", "Corrupt JPEG"); + + for (i = 0; i < 64; ++i) + z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); + L -= (sixteen ? 129 : 65); + } + return L == 0; + + case 0xC4: // DHT - define huffman table + L = stbi__get16be(z->s) - 2; + while (L > 0) { + stbi_uc * v; + int sizes[16], i, n = 0; + int q = stbi__get8(z->s); + int tc = q >> 4; + int th = q & 15; + if (tc > 1 || th > 3) + return stbi__err("bad DHT header", "Corrupt JPEG"); + for (i = 0; i < 16; ++i) { + sizes[i] = stbi__get8(z->s); + n += sizes[i]; + } + if (n > 256) + return stbi__err("bad DHT header", "Corrupt JPEG"); // Loop over i < n would write past end of values! + L -= 17; + if (tc == 0) { + if (!stbi__build_huffman(z->huff_dc + th, sizes)) + return 0; + v = z->huff_dc[th].values; + } else { + if (!stbi__build_huffman(z->huff_ac + th, sizes)) + return 0; + v = z->huff_ac[th].values; + } + for (i = 0; i < n; ++i) + v[i] = stbi__get8(z->s); + if (tc != 0) + stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); + L -= n; + } + return L == 0; + } + + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { + L = stbi__get16be(z->s); + if (L < 2) { + if (m == 0xFE) + return stbi__err("bad COM len", "Corrupt JPEG"); + else + return stbi__err("bad APP len", "Corrupt JPEG"); + } + L -= 2; + + if (m == 0xE0 && L >= 5) { // JFIF APP0 segment + static const unsigned char tag[5] = {'J', 'F', 'I', 'F', '\0'}; + int ok = 1; + int i; + for (i = 0; i < 5; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 5; + if (ok) + z->jfif = 1; + } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment + static const unsigned char tag[6] = {'A', 'd', 'o', 'b', 'e', '\0'}; + int ok = 1; + int i; + for (i = 0; i < 6; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 6; + if (ok) { + stbi__get8(z->s); // version + stbi__get16be(z->s); // flags0 + stbi__get16be(z->s); // flags1 + z->app14_color_transform = stbi__get8(z->s); // color transform + L -= 6; + } + } + + stbi__skip(z->s, L); + return 1; + } + + return stbi__err("unknown marker", "Corrupt JPEG"); +} + +// after we see SOS +static int stbi__process_scan_header(stbi__jpeg * z) { + int i; + int Ls = stbi__get16be(z->s); + z->scan_n = stbi__get8(z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n) + return stbi__err("bad SOS component count", "Corrupt JPEG"); + if (Ls != 6 + 2 * z->scan_n) + return stbi__err("bad SOS len", "Corrupt JPEG"); + for (i = 0; i < z->scan_n; ++i) { + int id = stbi__get8(z->s), which; + int q = stbi__get8(z->s); + for (which = 0; which < z->s->img_n; ++which) + if (z->img_comp[which].id == id) + break; + if (which == z->s->img_n) + return 0; // no match + z->img_comp[which].hd = q >> 4; + if (z->img_comp[which].hd > 3) + return stbi__err("bad DC huff", "Corrupt JPEG"); + z->img_comp[which].ha = q & 15; + if (z->img_comp[which].ha > 3) + return stbi__err("bad AC huff", "Corrupt JPEG"); + z->order[i] = which; + } + + { + int aa; + z->spec_start = stbi__get8(z->s); + z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 + aa = stbi__get8(z->s); + z->succ_high = (aa >> 4); + z->succ_low = (aa & 15); + if (z->progressive) { + if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) + return stbi__err("bad SOS", "Corrupt JPEG"); + } else { + if (z->spec_start != 0) + return stbi__err("bad SOS", "Corrupt JPEG"); + if (z->succ_high != 0 || z->succ_low != 0) + return stbi__err("bad SOS", "Corrupt JPEG"); + z->spec_end = 63; + } + } + + return 1; +} + +static int stbi__free_jpeg_components(stbi__jpeg * z, int ncomp, int why) { + int i; + for (i = 0; i < ncomp; ++i) { + if (z->img_comp[i].raw_data) { + STBI_FREE(z->img_comp[i].raw_data); + z->img_comp[i].raw_data = NULL; + z->img_comp[i].data = NULL; + } + if (z->img_comp[i].raw_coeff) { + STBI_FREE(z->img_comp[i].raw_coeff); + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].coeff = 0; + } + if (z->img_comp[i].linebuf) { + STBI_FREE(z->img_comp[i].linebuf); + z->img_comp[i].linebuf = NULL; + } + } + return why; +} + +static int stbi__process_frame_header(stbi__jpeg * z, int scan) { + stbi__context * s = z->s; + int Lf, p, i, q, h_max = 1, v_max = 1, c; + Lf = stbi__get16be(s); + if (Lf < 11) + return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG + p = stbi__get8(s); + if (p != 8) + return stbi__err("only 8-bit", "JPEG format not supported: 8-bit only"); // JPEG baseline + s->img_y = stbi__get16be(s); + if (s->img_y == 0) + return stbi__err("no header height", + "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = stbi__get16be(s); + if (s->img_x == 0) + return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + c = stbi__get8(s); + if (c != 3 && c != 1 && c != 4) + return stbi__err("bad component count", "Corrupt JPEG"); + s->img_n = c; + for (i = 0; i < c; ++i) { + z->img_comp[i].data = NULL; + z->img_comp[i].linebuf = NULL; + } + + if (Lf != 8 + 3 * s->img_n) + return stbi__err("bad SOF len", "Corrupt JPEG"); + + z->rgb = 0; + for (i = 0; i < s->img_n; ++i) { + static const unsigned char rgb[3] = {'R', 'G', 'B'}; + z->img_comp[i].id = stbi__get8(s); + if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) + ++z->rgb; + q = stbi__get8(s); + z->img_comp[i].h = (q >> 4); + if (!z->img_comp[i].h || z->img_comp[i].h > 4) + return stbi__err("bad H", "Corrupt JPEG"); + z->img_comp[i].v = q & 15; + if (!z->img_comp[i].v || z->img_comp[i].v > 4) + return stbi__err("bad V", "Corrupt JPEG"); + z->img_comp[i].tq = stbi__get8(s); + if (z->img_comp[i].tq > 3) + return stbi__err("bad TQ", "Corrupt JPEG"); + } + + if (scan != STBI__SCAN_load) + return 1; + + if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) + return stbi__err("too large", "Image too large to decode"); + + for (i = 0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) + h_max = z->img_comp[i].h; + if (z->img_comp[i].v > v_max) + v_max = z->img_comp[i].v; + } + + // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios + // and I've never seen a non-corrupted JPEG file actually use them + for (i = 0; i < s->img_n; ++i) { + if (h_max % z->img_comp[i].h != 0) + return stbi__err("bad H", "Corrupt JPEG"); + if (v_max % z->img_comp[i].v != 0) + return stbi__err("bad V", "Corrupt JPEG"); + } + + // compute interleaved mcu info + z->img_h_max = h_max; + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; + // these sizes can't be more than 17 bits + z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h; + + for (i = 0; i < s->img_n; ++i) { + // number of effective pixels (e.g. for non-interleaved MCU) + z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max; + z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max; + // to simplify generation, we'll allocate enough memory to decode + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion + // + // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) + // so these muls can't overflow with 32-bit ints (which we require) + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; + z->img_comp[i].coeff = 0; + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].linebuf = NULL; + z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); + if (z->img_comp[i].raw_data == NULL) + return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); + // align blocks for idct using mmx/sse + z->img_comp[i].data = (stbi_uc *)(((size_t)z->img_comp[i].raw_data + 15) & ~15); + if (z->progressive) { + // w2, h2 are multiples of 8 (see above) + z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; + z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; + z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); + if (z->img_comp[i].raw_coeff == NULL) + return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); + z->img_comp[i].coeff = (short *)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15); + } + } + + return 1; +} + +// use comparisons since in some cases we handle more than one case (e.g. SOF) +#define stbi__DNL(x) ((x) == 0xdc) +#define stbi__SOI(x) ((x) == 0xd8) +#define stbi__EOI(x) ((x) == 0xd9) +#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) +#define stbi__SOS(x) ((x) == 0xda) + +#define stbi__SOF_progressive(x) ((x) == 0xc2) + +static int stbi__decode_jpeg_header(stbi__jpeg * z, int scan) { + int m; + z->jfif = 0; + z->app14_color_transform = -1; // valid values are 0,1,2 + z->marker = STBI__MARKER_none; // initialize cached marker to empty + m = stbi__get_marker(z); + if (!stbi__SOI(m)) + return stbi__err("no SOI", "Corrupt JPEG"); + if (scan == STBI__SCAN_type) + return 1; + m = stbi__get_marker(z); + while (!stbi__SOF(m)) { + if (!stbi__process_marker(z, m)) + return 0; + m = stbi__get_marker(z); + while (m == STBI__MARKER_none) { + // some files have extra padding after their blocks, so ok, we'll scan + if (stbi__at_eof(z->s)) + return stbi__err("no SOF", "Corrupt JPEG"); + m = stbi__get_marker(z); + } + } + z->progressive = stbi__SOF_progressive(m); + if (!stbi__process_frame_header(z, scan)) + return 0; + return 1; +} + +static int stbi__skip_jpeg_junk_at_end(stbi__jpeg * j) { + // some JPEGs have junk at end, skip over it but if we find what looks + // like a valid marker, resume there + while (!stbi__at_eof(j->s)) { + int x = stbi__get8(j->s); + while (x == 255) { // might be a marker + if (stbi__at_eof(j->s)) + return STBI__MARKER_none; + x = stbi__get8(j->s); + if (x != 0x00 && x != 0xff) { + // not a stuffed zero or lead-in to another marker, looks + // like an actual marker, return it + return x; + } + // stuffed zero has x=0 now which ends the loop, meaning we go + // back to regular scan loop. + // repeated 0xff keeps trying to read the next byte of the marker. + } + } + return STBI__MARKER_none; +} + +// decode image to YCbCr format +static int stbi__decode_jpeg_image(stbi__jpeg * j) { + int m; + for (m = 0; m < 4; m++) { + j->img_comp[m].raw_data = NULL; + j->img_comp[m].raw_coeff = NULL; + } + j->restart_interval = 0; + if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) + return 0; + m = stbi__get_marker(j); + while (!stbi__EOI(m)) { + if (stbi__SOS(m)) { + if (!stbi__process_scan_header(j)) + return 0; + if (!stbi__parse_entropy_coded_data(j)) + return 0; + if (j->marker == STBI__MARKER_none) { + j->marker = stbi__skip_jpeg_junk_at_end(j); + // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 + } + m = stbi__get_marker(j); + if (STBI__RESTART(m)) + m = stbi__get_marker(j); + } else if (stbi__DNL(m)) { + int Ld = stbi__get16be(j->s); + stbi__uint32 NL = stbi__get16be(j->s); + if (Ld != 4) + return stbi__err("bad DNL len", "Corrupt JPEG"); + if (NL != j->s->img_y) + return stbi__err("bad DNL height", "Corrupt JPEG"); + m = stbi__get_marker(j); + } else { + if (!stbi__process_marker(j, m)) + return 1; + m = stbi__get_marker(j); + } + } + if (j->progressive) + stbi__jpeg_finish(j); + return 1; +} + +// static jfif-centered resampling (across block boundaries) + +typedef stbi_uc * (*resample_row_func)(stbi_uc * out, stbi_uc * in0, stbi_uc * in1, int w, int hs); + +#define stbi__div4(x) ((stbi_uc)((x) >> 2)) + +static stbi_uc * resample_row_1(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + STBI_NOTUSED(out); + STBI_NOTUSED(in_far); + STBI_NOTUSED(w); + STBI_NOTUSED(hs); + return in_near; +} + +static stbi_uc * stbi__resample_row_v_2(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate two samples vertically for every one in input + int i; + STBI_NOTUSED(hs); + for (i = 0; i < w; ++i) + out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2); + return out; +} + +static stbi_uc * stbi__resample_row_h_2(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate two samples horizontally for every one in input + int i; + stbi_uc * input = in_near; + + if (w == 1) { + // if only one sample, can't do any interpolation + out[0] = out[1] = input[0]; + return out; + } + + out[0] = input[0]; + out[1] = stbi__div4(input[0] * 3 + input[1] + 2); + for (i = 1; i < w - 1; ++i) { + int n = 3 * input[i] + 2; + out[i * 2 + 0] = stbi__div4(n + input[i - 1]); + out[i * 2 + 1] = stbi__div4(n + input[i + 1]); + } + out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2); + out[i * 2 + 1] = input[w - 1]; + + STBI_NOTUSED(in_far); + STBI_NOTUSED(hs); + + return out; +} + +#define stbi__div16(x) ((stbi_uc)((x) >> 4)) + +static stbi_uc * stbi__resample_row_hv_2(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate 2x2 samples for every one in input + int i, t0, t1; + if (w == 1) { + out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3 * in_near[0] + in_far[0]; + out[0] = stbi__div4(t1 + 2); + for (i = 1; i < w; ++i) { + t0 = t1; + t1 = 3 * in_near[i] + in_far[i]; + out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); + out[i * 2] = stbi__div16(3 * t1 + t0 + 8); + } + out[w * 2 - 1] = stbi__div4(t1 + 2); + + STBI_NOTUSED(hs); + + return out; +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static stbi_uc * stbi__resample_row_hv_2_simd(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate 2x2 samples for every one in input + int i = 0, t0, t1; + + if (w == 1) { + out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3 * in_near[0] + in_far[0]; + // process groups of 8 pixels for as long as we can. + // note we can't handle the last pixel in a row in this loop + // because we need to handle the filter boundary conditions. + for (; i < ((w - 1) & ~7); i += 8) { +#if defined(STBI_SSE2) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + __m128i zero = _mm_setzero_si128(); + __m128i farb = _mm_loadl_epi64((__m128i *)(in_far + i)); + __m128i nearb = _mm_loadl_epi64((__m128i *)(in_near + i)); + __m128i farw = _mm_unpacklo_epi8(farb, zero); + __m128i nearw = _mm_unpacklo_epi8(nearb, zero); + __m128i diff = _mm_sub_epi16(farw, nearw); + __m128i nears = _mm_slli_epi16(nearw, 2); + __m128i curr = _mm_add_epi16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + __m128i prv0 = _mm_slli_si128(curr, 2); + __m128i nxt0 = _mm_srli_si128(curr, 2); + __m128i prev = _mm_insert_epi16(prv0, t1, 0); + __m128i next = _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + __m128i bias = _mm_set1_epi16(8); + __m128i curs = _mm_slli_epi16(curr, 2); + __m128i prvd = _mm_sub_epi16(prev, curr); + __m128i nxtd = _mm_sub_epi16(next, curr); + __m128i curb = _mm_add_epi16(curs, bias); + __m128i even = _mm_add_epi16(prvd, curb); + __m128i odd = _mm_add_epi16(nxtd, curb); + + // interleave even and odd pixels, then undo scaling. + __m128i int0 = _mm_unpacklo_epi16(even, odd); + __m128i int1 = _mm_unpackhi_epi16(even, odd); + __m128i de0 = _mm_srli_epi16(int0, 4); + __m128i de1 = _mm_srli_epi16(int1, 4); + + // pack and write output + __m128i outv = _mm_packus_epi16(de0, de1); + _mm_storeu_si128((__m128i *)(out + i * 2), outv); +#elif defined(STBI_NEON) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + uint8x8_t farb = vld1_u8(in_far + i); + uint8x8_t nearb = vld1_u8(in_near + i); + int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); + int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); + int16x8_t curr = vaddq_s16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + int16x8_t prv0 = vextq_s16(curr, curr, 7); + int16x8_t nxt0 = vextq_s16(curr, curr, 1); + int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); + int16x8_t next = vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + int16x8_t curs = vshlq_n_s16(curr, 2); + int16x8_t prvd = vsubq_s16(prev, curr); + int16x8_t nxtd = vsubq_s16(next, curr); + int16x8_t even = vaddq_s16(curs, prvd); + int16x8_t odd = vaddq_s16(curs, nxtd); + + // undo scaling and round, then store with even/odd phases interleaved + uint8x8x2_t o; + o.val[0] = vqrshrun_n_s16(even, 4); + o.val[1] = vqrshrun_n_s16(odd, 4); + vst2_u8(out + i * 2, o); +#endif + + // "previous" value for next iter + t1 = 3 * in_near[i + 7] + in_far[i + 7]; + } + + t0 = t1; + t1 = 3 * in_near[i] + in_far[i]; + out[i * 2] = stbi__div16(3 * t1 + t0 + 8); + + for (++i; i < w; ++i) { + t0 = t1; + t1 = 3 * in_near[i] + in_far[i]; + out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); + out[i * 2] = stbi__div16(3 * t1 + t0 + 8); + } + out[w * 2 - 1] = stbi__div4(t1 + 2); + + STBI_NOTUSED(hs); + + return out; +} +#endif + +static stbi_uc * stbi__resample_row_generic(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // resample with nearest-neighbor + int i, j; + STBI_NOTUSED(in_far); + for (i = 0; i < w; ++i) + for (j = 0; j < hs; ++j) + out[i * hs + j] = in_near[i]; + return out; +} + +// this is a reduced-precision calculation of YCbCr-to-RGB introduced +// to make sure the code produces the same results in both SIMD and scalar +#define stbi__float2fixed(x) (((int)((x)*4096.0f + 0.5f)) << 8) +static void stbi__YCbCr_to_RGB_row(stbi_uc * out, const stbi_uc * y, const stbi_uc * pcb, const stbi_uc * pcr, int count, + int step) { + int i; + for (i = 0; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1 << 19); // rounding + int r, g, b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr * stbi__float2fixed(1.40200f); + g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb * stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned)r > 255) { + if (r < 0) + r = 0; + else + r = 255; + } + if ((unsigned)g > 255) { + if (g < 0) + g = 0; + else + g = 255; + } + if ((unsigned)b > 255) { + if (b < 0) + b = 0; + else + b = 255; + } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static void stbi__YCbCr_to_RGB_simd(stbi_uc * out, stbi_uc const * y, stbi_uc const * pcb, stbi_uc const * pcr, int count, + int step) { + int i = 0; + +#ifdef STBI_SSE2 + // step == 3 is pretty ugly on the final interleave, and i'm not convinced + // it's useful in practice (you wouldn't use it for textures, for example). + // so just accelerate step == 4 case. + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + __m128i signflip = _mm_set1_epi8(-0x80); + __m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f)); + __m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f)); + __m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f)); + __m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f)); + __m128i y_bias = _mm_set1_epi8((char)(unsigned char)128); + __m128i xw = _mm_set1_epi16(255); // alpha channel + + for (; i + 7 < count; i += 8) { + // load + __m128i y_bytes = _mm_loadl_epi64((__m128i *)(y + i)); + __m128i cr_bytes = _mm_loadl_epi64((__m128i *)(pcr + i)); + __m128i cb_bytes = _mm_loadl_epi64((__m128i *)(pcb + i)); + __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 + __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 + + // unpack to short (and left-shift cr, cb by 8) + __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); + __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); + __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); + + // color transform + __m128i yws = _mm_srli_epi16(yw, 4); + __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); + __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); + __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); + __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); + __m128i rws = _mm_add_epi16(cr0, yws); + __m128i gwt = _mm_add_epi16(cb0, yws); + __m128i bws = _mm_add_epi16(yws, cb1); + __m128i gws = _mm_add_epi16(gwt, cr1); + + // descale + __m128i rw = _mm_srai_epi16(rws, 4); + __m128i bw = _mm_srai_epi16(bws, 4); + __m128i gw = _mm_srai_epi16(gws, 4); + + // back to byte, set up for transpose + __m128i brb = _mm_packus_epi16(rw, bw); + __m128i gxb = _mm_packus_epi16(gw, xw); + + // transpose to interleave channels + __m128i t0 = _mm_unpacklo_epi8(brb, gxb); + __m128i t1 = _mm_unpackhi_epi8(brb, gxb); + __m128i o0 = _mm_unpacklo_epi16(t0, t1); + __m128i o1 = _mm_unpackhi_epi16(t0, t1); + + // store + _mm_storeu_si128((__m128i *)(out + 0), o0); + _mm_storeu_si128((__m128i *)(out + 16), o1); + out += 32; + } + } +#endif + +#ifdef STBI_NEON + // in this version, step=3 support would be easy to add. but is there demand? + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + uint8x8_t signflip = vdup_n_u8(0x80); + int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f)); + int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f)); + int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f)); + int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f)); + + for (; i + 7 < count; i += 8) { + // load + uint8x8_t y_bytes = vld1_u8(y + i); + uint8x8_t cr_bytes = vld1_u8(pcr + i); + uint8x8_t cb_bytes = vld1_u8(pcb + i); + int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); + int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); + + // expand to s16 + int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); + int16x8_t crw = vshll_n_s8(cr_biased, 7); + int16x8_t cbw = vshll_n_s8(cb_biased, 7); + + // color transform + int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); + int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); + int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); + int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); + int16x8_t rws = vaddq_s16(yws, cr0); + int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); + int16x8_t bws = vaddq_s16(yws, cb1); + + // undo scaling, round, convert to byte + uint8x8x4_t o; + o.val[0] = vqrshrun_n_s16(rws, 4); + o.val[1] = vqrshrun_n_s16(gws, 4); + o.val[2] = vqrshrun_n_s16(bws, 4); + o.val[3] = vdup_n_u8(255); + + // store, interleaving r/g/b/a + vst4_u8(out, o); + out += 8 * 4; + } + } +#endif + + for (; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1 << 19); // rounding + int r, g, b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr * stbi__float2fixed(1.40200f); + g = y_fixed + cr * -stbi__float2fixed(0.71414f) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb * stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned)r > 255) { + if (r < 0) + r = 0; + else + r = 255; + } + if ((unsigned)g > 255) { + if (g < 0) + g = 0; + else + g = 255; + } + if ((unsigned)b > 255) { + if (b < 0) + b = 0; + else + b = 255; + } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#endif + +// set up the kernels +static void stbi__setup_jpeg(stbi__jpeg * j) { + j->idct_block_kernel = stbi__idct_block; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; + +#ifdef STBI_SSE2 + if (stbi__sse2_available()) { + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + } +#endif + +#ifdef STBI_NEON + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; +#endif +} + +// clean up the temporary component buffers +static void stbi__cleanup_jpeg(stbi__jpeg * j) { stbi__free_jpeg_components(j, j->s->img_n, 0); } + +typedef struct { + resample_row_func resample; + stbi_uc *line0, *line1; + int hs, vs; // expansion factor in each axis + int w_lores; // horizontal pixels pre-expansion + int ystep; // how far through vertical expansion we are + int ypos; // which pre-expansion row we're on +} stbi__resample; + +// fast 0..255 * 0..255 => 0..255 rounded multiplication +static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) { + unsigned int t = x * y + 128; + return (stbi_uc)((t + (t >> 8)) >> 8); +} + +static stbi_uc * load_jpeg_image(stbi__jpeg * z, int * out_x, int * out_y, int * comp, int req_comp) { + int n, decode_n, is_rgb; + z->s->img_n = 0; // make stbi__cleanup_jpeg safe + + // validate req_comp + if (req_comp < 0 || req_comp > 4) + return stbi__errpuc("bad req_comp", "Internal error"); + + // load a jpeg image from whichever source, but leave in YCbCr format + if (!stbi__decode_jpeg_image(z)) { + stbi__cleanup_jpeg(z); + return NULL; + } + + // determine actual number of components to generate + n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; + + is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); + + if (z->s->img_n == 3 && n < 3 && !is_rgb) + decode_n = 1; + else + decode_n = z->s->img_n; + + // nothing to do if no components requested; check this now to avoid + // accessing uninitialized coutput[0] later + if (decode_n <= 0) { + stbi__cleanup_jpeg(z); + return NULL; + } + + // resample and color-convert + { + int k; + unsigned int i, j; + stbi_uc * output; + stbi_uc * coutput[4] = {NULL, NULL, NULL, NULL}; + + stbi__resample res_comp[4]; + + for (k = 0; k < decode_n; ++k) { + stbi__resample * r = &res_comp[k]; + + // allocate line buffer big enough for upsampling off the edges + // with upsample factor of 4 + z->img_comp[k].linebuf = (stbi_uc *)stbi__malloc(z->s->img_x + 3); + if (!z->img_comp[k].linebuf) { + stbi__cleanup_jpeg(z); + return stbi__errpuc("outofmem", "Out of memory"); + } + + r->hs = z->img_h_max / z->img_comp[k].h; + r->vs = z->img_v_max / z->img_comp[k].v; + r->ystep = r->vs >> 1; + r->w_lores = (z->s->img_x + r->hs - 1) / r->hs; + r->ypos = 0; + r->line0 = r->line1 = z->img_comp[k].data; + + if (r->hs == 1 && r->vs == 1) + r->resample = resample_row_1; + else if (r->hs == 1 && r->vs == 2) + r->resample = stbi__resample_row_v_2; + else if (r->hs == 2 && r->vs == 1) + r->resample = stbi__resample_row_h_2; + else if (r->hs == 2 && r->vs == 2) + r->resample = z->resample_row_hv_2_kernel; + else + r->resample = stbi__resample_row_generic; + } + + // can't error after this so, this is safe + output = (stbi_uc *)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); + if (!output) { + stbi__cleanup_jpeg(z); + return stbi__errpuc("outofmem", "Out of memory"); + } + + // now go ahead and resample + for (j = 0; j < z->s->img_y; ++j) { + stbi_uc * out = output + n * z->s->img_x * j; + for (k = 0; k < decode_n; ++k) { + stbi__resample * r = &res_comp[k]; + int y_bot = r->ystep >= (r->vs >> 1); + coutput[k] = r->resample(z->img_comp[k].linebuf, y_bot ? r->line1 : r->line0, y_bot ? r->line0 : r->line1, + r->w_lores, r->hs); + if (++r->ystep >= r->vs) { + r->ystep = 0; + r->line0 = r->line1; + if (++r->ypos < z->img_comp[k].y) + r->line1 += z->img_comp[k].w2; + } + } + if (n >= 3) { + stbi_uc * y = coutput[0]; + if (z->s->img_n == 3) { + if (is_rgb) { + for (i = 0; i < z->s->img_x; ++i) { + out[0] = y[i]; + out[1] = coutput[1][i]; + out[2] = coutput[2][i]; + out[3] = 255; + out += n; + } + } else { + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else if (z->s->img_n == 4) { + if (z->app14_color_transform == 0) { // CMYK + for (i = 0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(coutput[0][i], m); + out[1] = stbi__blinn_8x8(coutput[1][i], m); + out[2] = stbi__blinn_8x8(coutput[2][i], m); + out[3] = 255; + out += n; + } + } else if (z->app14_color_transform == 2) { // YCCK + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + for (i = 0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(255 - out[0], m); + out[1] = stbi__blinn_8x8(255 - out[1], m); + out[2] = stbi__blinn_8x8(255 - out[2], m); + out += n; + } + } else { // YCbCr + alpha? Ignore the fourth channel for now + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else + for (i = 0; i < z->s->img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; + out[3] = 255; // not used if n==3 + out += n; + } + } else { + if (is_rgb) { + if (n == 1) + for (i = 0; i < z->s->img_x; ++i) + *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + else { + for (i = 0; i < z->s->img_x; ++i, out += 2) { + out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + out[1] = 255; + } + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { + for (i = 0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); + stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); + stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); + out[0] = stbi__compute_y(r, g, b); + out[1] = 255; + out += n; + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { + for (i = 0; i < z->s->img_x; ++i) { + out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); + out[1] = 255; + out += n; + } + } else { + stbi_uc * y = coutput[0]; + if (n == 1) + for (i = 0; i < z->s->img_x; ++i) + out[i] = y[i]; + else + for (i = 0; i < z->s->img_x; ++i) { + *out++ = y[i]; + *out++ = 255; + } + } + } + } + stbi__cleanup_jpeg(z); + *out_x = z->s->img_x; + *out_y = z->s->img_y; + if (comp) + *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output + return output; + } +} + +static void * stbi__jpeg_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + unsigned char * result; + stbi__jpeg * j = (stbi__jpeg *)stbi__malloc(sizeof(stbi__jpeg)); + if (!j) + return stbi__errpuc("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + STBI_NOTUSED(ri); + j->s = s; + stbi__setup_jpeg(j); + result = load_jpeg_image(j, x, y, comp, req_comp); + STBI_FREE(j); + return result; +} + +static int stbi__jpeg_test(stbi__context * s) { + int r; + stbi__jpeg * j = (stbi__jpeg *)stbi__malloc(sizeof(stbi__jpeg)); + if (!j) + return stbi__err("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + j->s = s; + stbi__setup_jpeg(j); + r = stbi__decode_jpeg_header(j, STBI__SCAN_type); + stbi__rewind(s); + STBI_FREE(j); + return r; +} + +static int stbi__jpeg_info_raw(stbi__jpeg * j, int * x, int * y, int * comp) { + if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { + stbi__rewind(j->s); + return 0; + } + if (x) + *x = j->s->img_x; + if (y) + *y = j->s->img_y; + if (comp) + *comp = j->s->img_n >= 3 ? 3 : 1; + return 1; +} + +static int stbi__jpeg_info(stbi__context * s, int * x, int * y, int * comp) { + int result; + stbi__jpeg * j = (stbi__jpeg *)(stbi__malloc(sizeof(stbi__jpeg))); + if (!j) + return stbi__err("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + j->s = s; + result = stbi__jpeg_info_raw(j, x, y, comp); + STBI_FREE(j); + return result; +} +#endif + +// public domain zlib decode v0.2 Sean Barrett 2006-11-18 +// simple implementation +// - all input must be provided in an upfront buffer +// - all output is written to a single output buffer (can malloc/realloc) +// performance +// - fast huffman + +#ifndef STBI_NO_ZLIB + +// fast-way is faster to check than jpeg huffman, but slow way is slower +#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables +#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) +#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet + +// zlib-style huffman encoding +// (jpegs packs from left, zlib from right, so can't share code) +typedef struct { + stbi__uint16 fast[1 << STBI__ZFAST_BITS]; + stbi__uint16 firstcode[16]; + int maxcode[17]; + stbi__uint16 firstsymbol[16]; + stbi_uc size[STBI__ZNSYMS]; + stbi__uint16 value[STBI__ZNSYMS]; +} stbi__zhuffman; + +stbi_inline static int stbi__bitreverse16(int n) { + n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); + n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); + n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); + n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); + return n; +} + +stbi_inline static int stbi__bit_reverse(int v, int bits) { + STBI_ASSERT(bits <= 16); + // to bit reverse n bits, reverse 16 and shift + // e.g. 11 bits, bit reverse and shift away 5 + return stbi__bitreverse16(v) >> (16 - bits); +} + +static int stbi__zbuild_huffman(stbi__zhuffman * z, const stbi_uc * sizelist, int num) { + int i, k = 0; + int code, next_code[16], sizes[17]; + + // DEFLATE spec for generating codes + memset(sizes, 0, sizeof(sizes)); + memset(z->fast, 0, sizeof(z->fast)); + for (i = 0; i < num; ++i) + ++sizes[sizelist[i]]; + sizes[0] = 0; + for (i = 1; i < 16; ++i) + if (sizes[i] > (1 << i)) + return stbi__err("bad sizes", "Corrupt PNG"); + code = 0; + for (i = 1; i < 16; ++i) { + next_code[i] = code; + z->firstcode[i] = (stbi__uint16)code; + z->firstsymbol[i] = (stbi__uint16)k; + code = (code + sizes[i]); + if (sizes[i]) + if (code - 1 >= (1 << i)) + return stbi__err("bad codelengths", "Corrupt PNG"); + z->maxcode[i] = code << (16 - i); // preshift for inner loop + code <<= 1; + k += sizes[i]; + } + z->maxcode[16] = 0x10000; // sentinel + for (i = 0; i < num; ++i) { + int s = sizelist[i]; + if (s) { + int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; + stbi__uint16 fastv = (stbi__uint16)((s << 9) | i); + z->size[c] = (stbi_uc)s; + z->value[c] = (stbi__uint16)i; + if (s <= STBI__ZFAST_BITS) { + int j = stbi__bit_reverse(next_code[s], s); + while (j < (1 << STBI__ZFAST_BITS)) { + z->fast[j] = fastv; + j += (1 << s); + } + } + ++next_code[s]; + } + } + return 1; +} + +// zlib-from-memory implementation for PNG reading +// because PNG allows splitting the zlib stream arbitrarily, +// and it's annoying structurally to have PNG call ZLIB call PNG, +// we require PNG read all the IDATs and combine them into a single +// memory buffer + +typedef struct { + stbi_uc *zbuffer, *zbuffer_end; + int num_bits; + stbi__uint32 code_buffer; + + char * zout; + char * zout_start; + char * zout_end; + int z_expandable; + + stbi__zhuffman z_length, z_distance; +} stbi__zbuf; + +stbi_inline static int stbi__zeof(stbi__zbuf * z) { return (z->zbuffer >= z->zbuffer_end); } + +stbi_inline static stbi_uc stbi__zget8(stbi__zbuf * z) { return stbi__zeof(z) ? 0 : *z->zbuffer++; } + +static void stbi__fill_bits(stbi__zbuf * z) { + do { + if (z->code_buffer >= (1U << z->num_bits)) { + z->zbuffer = z->zbuffer_end; /* treat this as EOF so we fail. */ + return; + } + z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); +} + +stbi_inline static unsigned int stbi__zreceive(stbi__zbuf * z, int n) { + unsigned int k; + if (z->num_bits < n) + stbi__fill_bits(z); + k = z->code_buffer & ((1 << n) - 1); + z->code_buffer >>= n; + z->num_bits -= n; + return k; +} + +static int stbi__zhuffman_decode_slowpath(stbi__zbuf * a, stbi__zhuffman * z) { + int b, s, k; + // not resolved by fast table, so compute it the slow way + // use jpeg approach, which requires MSbits at top + k = stbi__bit_reverse(a->code_buffer, 16); + for (s = STBI__ZFAST_BITS + 1;; ++s) + if (k < z->maxcode[s]) + break; + if (s >= 16) + return -1; // invalid code! + // code size is s, so: + b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s]; + if (b >= STBI__ZNSYMS) + return -1; // some data was corrupt somewhere! + if (z->size[b] != s) + return -1; // was originally an assert, but report failure instead. + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; +} + +stbi_inline static int stbi__zhuffman_decode(stbi__zbuf * a, stbi__zhuffman * z) { + int b, s; + if (a->num_bits < 16) { + if (stbi__zeof(a)) { + return -1; /* report error for unexpected end of data. */ + } + stbi__fill_bits(a); + } + b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; + if (b) { + s = b >> 9; + a->code_buffer >>= s; + a->num_bits -= s; + return b & 511; + } + return stbi__zhuffman_decode_slowpath(a, z); +} + +static int stbi__zexpand(stbi__zbuf * z, char * zout, int n) // need to make room for n bytes +{ + char * q; + unsigned int cur, limit, old_limit; + z->zout = zout; + if (!z->z_expandable) + return stbi__err("output buffer limit", "Corrupt PNG"); + cur = (unsigned int)(z->zout - z->zout_start); + limit = old_limit = (unsigned)(z->zout_end - z->zout_start); + if (UINT_MAX - cur < (unsigned)n) + return stbi__err("outofmem", "Out of memory"); + while (cur + n > limit) { + if (limit > UINT_MAX / 2) + return stbi__err("outofmem", "Out of memory"); + limit *= 2; + } + q = (char *)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); + STBI_NOTUSED(old_limit); + if (q == NULL) + return stbi__err("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; + z->zout_end = q + limit; + return 1; +} + +static const int stbi__zlength_base[31] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, + 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; + +static const int stbi__zlength_extra[31] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, + 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0}; + +static const int stbi__zdist_base[32] = {1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, + 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, + 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0, 0}; + +static const int stbi__zdist_extra[32] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, + 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; + +static int stbi__parse_huffman_block(stbi__zbuf * a) { + char * zout = a->zout; + for (;;) { + int z = stbi__zhuffman_decode(a, &a->z_length); + if (z < 256) { + if (z < 0) + return stbi__err("bad huffman code", "Corrupt PNG"); // error in huffman codes + if (zout >= a->zout_end) { + if (!stbi__zexpand(a, zout, 1)) + return 0; + zout = a->zout; + } + *zout++ = (char)z; + } else { + stbi_uc * p; + int len, dist; + if (z == 256) { + a->zout = zout; + return 1; + } + if (z >= 286) + return stbi__err("bad huffman code", + "Corrupt PNG"); // per DEFLATE, length codes 286 and 287 must not appear in compressed data + z -= 257; + len = stbi__zlength_base[z]; + if (stbi__zlength_extra[z]) + len += stbi__zreceive(a, stbi__zlength_extra[z]); + z = stbi__zhuffman_decode(a, &a->z_distance); + if (z < 0 || z >= 30) + return stbi__err("bad huffman code", + "Corrupt PNG"); // per DEFLATE, distance codes 30 and 31 must not appear in compressed data + dist = stbi__zdist_base[z]; + if (stbi__zdist_extra[z]) + dist += stbi__zreceive(a, stbi__zdist_extra[z]); + if (zout - a->zout_start < dist) + return stbi__err("bad dist", "Corrupt PNG"); + if (zout + len > a->zout_end) { + if (!stbi__zexpand(a, zout, len)) + return 0; + zout = a->zout; + } + p = (stbi_uc *)(zout - dist); + if (dist == 1) { // run of one byte; common in images. + stbi_uc v = *p; + if (len) { + do + *zout++ = v; + while (--len); + } + } else { + if (len) { + do + *zout++ = *p++; + while (--len); + } + } + } + } +} + +static int stbi__compute_huffman_codes(stbi__zbuf * a) { + static const stbi_uc length_dezigzag[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; + stbi__zhuffman z_codelength; + stbi_uc lencodes[286 + 32 + 137]; // padding for maximum single op + stbi_uc codelength_sizes[19]; + int i, n; + + int hlit = stbi__zreceive(a, 5) + 257; + int hdist = stbi__zreceive(a, 5) + 1; + int hclen = stbi__zreceive(a, 4) + 4; + int ntot = hlit + hdist; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i = 0; i < hclen; ++i) { + int s = stbi__zreceive(a, 3); + codelength_sizes[length_dezigzag[i]] = (stbi_uc)s; + } + if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) + return 0; + + n = 0; + while (n < ntot) { + int c = stbi__zhuffman_decode(a, &z_codelength); + if (c < 0 || c >= 19) + return stbi__err("bad codelengths", "Corrupt PNG"); + if (c < 16) + lencodes[n++] = (stbi_uc)c; + else { + stbi_uc fill = 0; + if (c == 16) { + c = stbi__zreceive(a, 2) + 3; + if (n == 0) + return stbi__err("bad codelengths", "Corrupt PNG"); + fill = lencodes[n - 1]; + } else if (c == 17) { + c = stbi__zreceive(a, 3) + 3; + } else if (c == 18) { + c = stbi__zreceive(a, 7) + 11; + } else { + return stbi__err("bad codelengths", "Corrupt PNG"); + } + if (ntot - n < c) + return stbi__err("bad codelengths", "Corrupt PNG"); + memset(lencodes + n, fill, c); + n += c; + } + } + if (n != ntot) + return stbi__err("bad codelengths", "Corrupt PNG"); + if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) + return 0; + if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist)) + return 0; + return 1; +} + +static int stbi__parse_uncompressed_block(stbi__zbuf * a) { + stbi_uc header[4]; + int len, nlen, k; + if (a->num_bits & 7) + stbi__zreceive(a, a->num_bits & 7); // discard + // drain the bit-packed data into header + k = 0; + while (a->num_bits > 0) { + header[k++] = (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check + a->code_buffer >>= 8; + a->num_bits -= 8; + } + if (a->num_bits < 0) + return stbi__err("zlib corrupt", "Corrupt PNG"); + // now fill header the normal way + while (k < 4) + header[k++] = stbi__zget8(a); + len = header[1] * 256 + header[0]; + nlen = header[3] * 256 + header[2]; + if (nlen != (len ^ 0xffff)) + return stbi__err("zlib corrupt", "Corrupt PNG"); + if (a->zbuffer + len > a->zbuffer_end) + return stbi__err("read past buffer", "Corrupt PNG"); + if (a->zout + len > a->zout_end) + if (!stbi__zexpand(a, a->zout, len)) + return 0; + memcpy(a->zout, a->zbuffer, len); + a->zbuffer += len; + a->zout += len; + return 1; +} + +static int stbi__parse_zlib_header(stbi__zbuf * a) { + int cmf = stbi__zget8(a); + int cm = cmf & 15; + /* int cinfo = cmf >> 4; */ + int flg = stbi__zget8(a); + if (stbi__zeof(a)) + return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec + if ((cmf * 256 + flg) % 31 != 0) + return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec + if (flg & 32) + return stbi__err("no preset dict", "Corrupt PNG"); // preset dictionary not allowed in png + if (cm != 8) + return stbi__err("bad compression", "Corrupt PNG"); // DEFLATE required for png + // window = 1 << (8 + cinfo)... but who cares, we fully buffer output + return 1; +} + +static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] = { + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, + 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, + 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, + 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8}; +static const stbi_uc stbi__zdefault_distance[32] = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5}; +/* +Init algorithm: +{ + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; + for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; + for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; + for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; + + for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; +} +*/ + +static int stbi__parse_zlib(stbi__zbuf * a, int parse_header) { + int final, type; + if (parse_header) + if (!stbi__parse_zlib_header(a)) + return 0; + a->num_bits = 0; + a->code_buffer = 0; + do { + final = stbi__zreceive(a, 1); + type = stbi__zreceive(a, 2); + if (type == 0) { + if (!stbi__parse_uncompressed_block(a)) + return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths + if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length, STBI__ZNSYMS)) + return 0; + if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) + return 0; + } else { + if (!stbi__compute_huffman_codes(a)) + return 0; + } + if (!stbi__parse_huffman_block(a)) + return 0; + } + } while (!final); + return 1; +} + +static int stbi__do_zlib(stbi__zbuf * a, char * obuf, int olen, int exp, int parse_header) { + a->zout_start = obuf; + a->zout = obuf; + a->zout_end = obuf + olen; + a->z_expandable = exp; + + return stbi__parse_zlib(a, parse_header); +} + +STBIDEF char * stbi_zlib_decode_malloc_guesssize(const char * buffer, int len, int initial_size, int * outlen) { + stbi__zbuf a; + char * p = (char *)stbi__malloc(initial_size); + if (p == NULL) + return NULL; + a.zbuffer = (stbi_uc *)buffer; + a.zbuffer_end = (stbi_uc *)buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { + if (outlen) + *outlen = (int)(a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF char * stbi_zlib_decode_malloc(char const * buffer, int len, int * outlen) { + return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); +} + +STBIDEF char * stbi_zlib_decode_malloc_guesssize_headerflag(const char * buffer, int len, int initial_size, int * outlen, + int parse_header) { + stbi__zbuf a; + char * p = (char *)stbi__malloc(initial_size); + if (p == NULL) + return NULL; + a.zbuffer = (stbi_uc *)buffer; + a.zbuffer_end = (stbi_uc *)buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { + if (outlen) + *outlen = (int)(a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_buffer(char * obuffer, int olen, char const * ibuffer, int ilen) { + stbi__zbuf a; + a.zbuffer = (stbi_uc *)ibuffer; + a.zbuffer_end = (stbi_uc *)ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) + return (int)(a.zout - a.zout_start); + else + return -1; +} + +STBIDEF char * stbi_zlib_decode_noheader_malloc(char const * buffer, int len, int * outlen) { + stbi__zbuf a; + char * p = (char *)stbi__malloc(16384); + if (p == NULL) + return NULL; + a.zbuffer = (stbi_uc *)buffer; + a.zbuffer_end = (stbi_uc *)buffer + len; + if (stbi__do_zlib(&a, p, 16384, 1, 0)) { + if (outlen) + *outlen = (int)(a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_noheader_buffer(char * obuffer, int olen, const char * ibuffer, int ilen) { + stbi__zbuf a; + a.zbuffer = (stbi_uc *)ibuffer; + a.zbuffer_end = (stbi_uc *)ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) + return (int)(a.zout - a.zout_start); + else + return -1; +} +#endif + +// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 +// simple implementation +// - only 8-bit samples +// - no CRC checking +// - allocates lots of intermediate memory +// - avoids problem of streaming data between subsystems +// - avoids explicit window management +// performance +// - uses stb_zlib, a PD zlib implementation with fast huffman decoding + +#ifndef STBI_NO_PNG +typedef struct { + stbi__uint32 length; + stbi__uint32 type; +} stbi__pngchunk; + +static stbi__pngchunk stbi__get_chunk_header(stbi__context * s) { + stbi__pngchunk c; + c.length = stbi__get32be(s); + c.type = stbi__get32be(s); + return c; +} + +static int stbi__check_png_header(stbi__context * s) { + static const stbi_uc png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; + int i; + for (i = 0; i < 8; ++i) + if (stbi__get8(s) != png_sig[i]) + return stbi__err("bad png sig", "Not a PNG"); + return 1; +} + +typedef struct { + stbi__context * s; + stbi_uc *idata, *expanded, *out; + int depth; +} stbi__png; + +enum { + STBI__F_none = 0, + STBI__F_sub = 1, + STBI__F_up = 2, + STBI__F_avg = 3, + STBI__F_paeth = 4, + // synthetic filters used for first scanline to avoid needing a dummy row of 0s + STBI__F_avg_first, + STBI__F_paeth_first +}; + +static stbi_uc first_row_filter[5] = {STBI__F_none, STBI__F_sub, STBI__F_none, STBI__F_avg_first, STBI__F_paeth_first}; + +static int stbi__paeth(int a, int b, int c) { + int p = a + b - c; + int pa = abs(p - a); + int pb = abs(p - b); + int pc = abs(p - c); + if (pa <= pb && pa <= pc) + return a; + if (pb <= pc) + return b; + return c; +} + +static const stbi_uc stbi__depth_scale_table[9] = {0, 0xff, 0x55, 0, 0x11, 0, 0, 0, 0x01}; + +// create the png data from post-deflated data +static int stbi__create_png_image_raw(stbi__png * a, stbi_uc * raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, + stbi__uint32 y, int depth, int color) { + int bytes = (depth == 16 ? 2 : 1); + stbi__context * s = a->s; + stbi__uint32 i, j, stride = x * out_n * bytes; + stbi__uint32 img_len, img_width_bytes; + int k; + int img_n = s->img_n; // copy it into a local for later + + int output_bytes = out_n * bytes; + int filter_bytes = img_n * bytes; + int width = x; + + STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1); + a->out = (stbi_uc *)stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into + if (!a->out) + return stbi__err("outofmem", "Out of memory"); + + if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) + return stbi__err("too large", "Corrupt PNG"); + img_width_bytes = (((img_n * x * depth) + 7) >> 3); + img_len = (img_width_bytes + 1) * y; + + // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, + // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), + // so just check for raw_len < img_len always. + if (raw_len < img_len) + return stbi__err("not enough pixels", "Corrupt PNG"); + + for (j = 0; j < y; ++j) { + stbi_uc * cur = a->out + stride * j; + stbi_uc * prior; + int filter = *raw++; + + if (filter > 4) + return stbi__err("invalid filter", "Corrupt PNG"); + + if (depth < 8) { + if (img_width_bytes > x) + return stbi__err("invalid width", "Corrupt PNG"); + cur += x * out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place + filter_bytes = 1; + width = img_width_bytes; + } + prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above + + // if first row, use special filter that doesn't sample previous row + if (j == 0) + filter = first_row_filter[filter]; + + // handle first byte explicitly + for (k = 0; k < filter_bytes; ++k) { + switch (filter) { + case STBI__F_none: + cur[k] = raw[k]; + break; + case STBI__F_sub: + cur[k] = raw[k]; + break; + case STBI__F_up: + cur[k] = STBI__BYTECAST(raw[k] + prior[k]); + break; + case STBI__F_avg: + cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1)); + break; + case STBI__F_paeth: + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0)); + break; + case STBI__F_avg_first: + cur[k] = raw[k]; + break; + case STBI__F_paeth_first: + cur[k] = raw[k]; + break; + } + } + + if (depth == 8) { + if (img_n != out_n) + cur[img_n] = 255; // first pixel + raw += img_n; + cur += out_n; + prior += out_n; + } else if (depth == 16) { + if (img_n != out_n) { + cur[filter_bytes] = 255; // first pixel top byte + cur[filter_bytes + 1] = 255; // first pixel bottom byte + } + raw += filter_bytes; + cur += output_bytes; + prior += output_bytes; + } else { + raw += 1; + cur += 1; + prior += 1; + } + + // this is a little gross, so that we don't switch per-pixel or per-component + if (depth < 8 || img_n == out_n) { + int nk = (width - 1) * filter_bytes; +#define STBI__CASE(f) \ + case f: \ + for (k = 0; k < nk; ++k) + switch (filter) { + // "none" filter turns into a memcpy here; make that explicit. + case STBI__F_none: + memcpy(cur, raw, nk); + break; + STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]); } + break; + STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } + break; + STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)); } + break; + STBI__CASE(STBI__F_paeth) { + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k], prior[k - filter_bytes])); + } + break; + STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1)); } + break; + STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)); } + break; + } +#undef STBI__CASE + raw += nk; + } else { + STBI_ASSERT(img_n + 1 == out_n); +#define STBI__CASE(f) \ + case f: \ + for (i = x - 1; i >= 1; --i, cur[filter_bytes] = 255, raw += filter_bytes, cur += output_bytes, prior += output_bytes) \ + for (k = 0; k < filter_bytes; ++k) + switch (filter) { + STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } + break; + STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]); } + break; + STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } + break; + STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)); } + break; + STBI__CASE(STBI__F_paeth) { + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], prior[k], prior[k - output_bytes])); + } + break; + STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1)); } + break; + STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)); } + break; + } +#undef STBI__CASE + + // the loop above sets the high byte of the pixels' alpha, but for + // 16 bit png files we also need the low byte set. we'll do that here. + if (depth == 16) { + cur = a->out + stride * j; // start at the beginning of the row again + for (i = 0; i < x; ++i, cur += output_bytes) { + cur[filter_bytes + 1] = 255; + } + } + } + } + + // we make a separate pass to expand bits to pixels; for performance, + // this could run two scanlines behind the above code, so it won't + // intefere with filtering but will still be in the cache. + if (depth < 8) { + for (j = 0; j < y; ++j) { + stbi_uc * cur = a->out + stride * j; + stbi_uc * in = a->out + stride * j + x * out_n - img_width_bytes; + // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for + // 1/2/4-bit png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that + // will be skipped in the later loop + stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range + + // note that the final byte might overshoot and write more data than desired. + // we can allocate enough data that this never writes out of memory, but it + // could also overwrite the next scanline. can it overwrite non-empty data + // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. + // so we need to explicitly clamp the final ones + + if (depth == 4) { + for (k = x * img_n; k >= 2; k -= 2, ++in) { + *cur++ = scale * ((*in >> 4)); + *cur++ = scale * ((*in) & 0x0f); + } + if (k > 0) + *cur++ = scale * ((*in >> 4)); + } else if (depth == 2) { + for (k = x * img_n; k >= 4; k -= 4, ++in) { + *cur++ = scale * ((*in >> 6)); + *cur++ = scale * ((*in >> 4) & 0x03); + *cur++ = scale * ((*in >> 2) & 0x03); + *cur++ = scale * ((*in) & 0x03); + } + if (k > 0) + *cur++ = scale * ((*in >> 6)); + if (k > 1) + *cur++ = scale * ((*in >> 4) & 0x03); + if (k > 2) + *cur++ = scale * ((*in >> 2) & 0x03); + } else if (depth == 1) { + for (k = x * img_n; k >= 8; k -= 8, ++in) { + *cur++ = scale * ((*in >> 7)); + *cur++ = scale * ((*in >> 6) & 0x01); + *cur++ = scale * ((*in >> 5) & 0x01); + *cur++ = scale * ((*in >> 4) & 0x01); + *cur++ = scale * ((*in >> 3) & 0x01); + *cur++ = scale * ((*in >> 2) & 0x01); + *cur++ = scale * ((*in >> 1) & 0x01); + *cur++ = scale * ((*in) & 0x01); + } + if (k > 0) + *cur++ = scale * ((*in >> 7)); + if (k > 1) + *cur++ = scale * ((*in >> 6) & 0x01); + if (k > 2) + *cur++ = scale * ((*in >> 5) & 0x01); + if (k > 3) + *cur++ = scale * ((*in >> 4) & 0x01); + if (k > 4) + *cur++ = scale * ((*in >> 3) & 0x01); + if (k > 5) + *cur++ = scale * ((*in >> 2) & 0x01); + if (k > 6) + *cur++ = scale * ((*in >> 1) & 0x01); + } + if (img_n != out_n) { + int q; + // insert alpha = 255 + cur = a->out + stride * j; + if (img_n == 1) { + for (q = x - 1; q >= 0; --q) { + cur[q * 2 + 1] = 255; + cur[q * 2 + 0] = cur[q]; + } + } else { + STBI_ASSERT(img_n == 3); + for (q = x - 1; q >= 0; --q) { + cur[q * 4 + 3] = 255; + cur[q * 4 + 2] = cur[q * 3 + 2]; + cur[q * 4 + 1] = cur[q * 3 + 1]; + cur[q * 4 + 0] = cur[q * 3 + 0]; + } + } + } + } + } else if (depth == 16) { + // force the image data from big-endian to platform-native. + // this is done in a separate pass due to the decoding relying + // on the data being untouched, but could probably be done + // per-line during decode if care is taken. + stbi_uc * cur = a->out; + stbi__uint16 * cur16 = (stbi__uint16 *)cur; + + for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) { + *cur16 = (cur[0] << 8) | cur[1]; + } + } + + return 1; +} + +static int stbi__create_png_image(stbi__png * a, stbi_uc * image_data, stbi__uint32 image_data_len, int out_n, int depth, + int color, int interlaced) { + int bytes = (depth == 16 ? 2 : 1); + int out_bytes = out_n * bytes; + stbi_uc * final; + int p; + if (!interlaced) + return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); + + // de-interlacing + final = (stbi_uc *)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); + if (!final) + return stbi__err("outofmem", "Out of memory"); + for (p = 0; p < 7; ++p) { + int xorig[] = {0, 4, 0, 2, 0, 1, 0}; + int yorig[] = {0, 0, 4, 0, 2, 0, 1}; + int xspc[] = {8, 8, 4, 4, 2, 2, 1}; + int yspc[] = {8, 8, 8, 4, 4, 2, 2}; + int i, j, x, y; + // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 + x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p]; + y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p]; + if (x && y) { + stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; + if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { + STBI_FREE(final); + return 0; + } + for (j = 0; j < y; ++j) { + for (i = 0; i < x; ++i) { + int out_y = j * yspc[p] + yorig[p]; + int out_x = i * xspc[p] + xorig[p]; + memcpy(final + out_y * a->s->img_x * out_bytes + out_x * out_bytes, a->out + (j * x + i) * out_bytes, + out_bytes); + } + } + STBI_FREE(a->out); + image_data += img_len; + image_data_len -= img_len; + } + } + a->out = final; + + return 1; +} + +static int stbi__compute_transparency(stbi__png * z, stbi_uc tc[3], int out_n) { + stbi__context * s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc * p = z->out; + + // compute color-based transparency, assuming we've + // already got 255 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i = 0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 255); + p += 2; + } + } else { + for (i = 0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__compute_transparency16(stbi__png * z, stbi__uint16 tc[3], int out_n) { + stbi__context * s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi__uint16 * p = (stbi__uint16 *)z->out; + + // compute color-based transparency, assuming we've + // already got 65535 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i = 0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 65535); + p += 2; + } + } else { + for (i = 0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__expand_png_palette(stbi__png * a, stbi_uc * palette, int len, int pal_img_n) { + stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; + stbi_uc *p, *temp_out, *orig = a->out; + + p = (stbi_uc *)stbi__malloc_mad2(pixel_count, pal_img_n, 0); + if (p == NULL) + return stbi__err("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak + temp_out = p; + + if (pal_img_n == 3) { + for (i = 0; i < pixel_count; ++i) { + int n = orig[i] * 4; + p[0] = palette[n]; + p[1] = palette[n + 1]; + p[2] = palette[n + 2]; + p += 3; + } + } else { + for (i = 0; i < pixel_count; ++i) { + int n = orig[i] * 4; + p[0] = palette[n]; + p[1] = palette[n + 1]; + p[2] = palette[n + 2]; + p[3] = palette[n + 3]; + p += 4; + } + } + STBI_FREE(a->out); + a->out = temp_out; + + STBI_NOTUSED(len); + + return 1; +} + +static int stbi__unpremultiply_on_load_global = 0; +static int stbi__de_iphone_flag_global = 0; + +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) { + stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) { + stbi__de_iphone_flag_global = flag_true_if_should_convert; +} + +#ifndef STBI_THREAD_LOCAL +#define stbi__unpremultiply_on_load stbi__unpremultiply_on_load_global +#define stbi__de_iphone_flag stbi__de_iphone_flag_global +#else +static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set; +static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set; + +STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply) { + stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply; + stbi__unpremultiply_on_load_set = 1; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert) { + stbi__de_iphone_flag_local = flag_true_if_should_convert; + stbi__de_iphone_flag_set = 1; +} + +#define stbi__unpremultiply_on_load \ + (stbi__unpremultiply_on_load_set ? stbi__unpremultiply_on_load_local : stbi__unpremultiply_on_load_global) +#define stbi__de_iphone_flag (stbi__de_iphone_flag_set ? stbi__de_iphone_flag_local : stbi__de_iphone_flag_global) +#endif // STBI_THREAD_LOCAL + +static void stbi__de_iphone(stbi__png * z) { + stbi__context * s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc * p = z->out; + + if (s->img_out_n == 3) { // convert bgr to rgb + for (i = 0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 3; + } + } else { + STBI_ASSERT(s->img_out_n == 4); + if (stbi__unpremultiply_on_load) { + // convert bgr to rgb and unpremultiply + for (i = 0; i < pixel_count; ++i) { + stbi_uc a = p[3]; + stbi_uc t = p[0]; + if (a) { + stbi_uc half = a / 2; + p[0] = (p[2] * 255 + half) / a; + p[1] = (p[1] * 255 + half) / a; + p[2] = (t * 255 + half) / a; + } else { + p[0] = p[2]; + p[2] = t; + } + p += 4; + } + } else { + // convert bgr to rgb + for (i = 0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 4; + } + } + } +} + +#define STBI__PNG_TYPE(a, b, c, d) (((unsigned)(a) << 24) + ((unsigned)(b) << 16) + ((unsigned)(c) << 8) + (unsigned)(d)) + +static int stbi__parse_png_file(stbi__png * z, int scan, int req_comp) { + stbi_uc palette[1024], pal_img_n = 0; + stbi_uc has_trans = 0, tc[3] = {0}; + stbi__uint16 tc16[3]; + stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0; + int first = 1, k, interlace = 0, color = 0, is_iphone = 0; + stbi__context * s = z->s; + + z->expanded = NULL; + z->idata = NULL; + z->out = NULL; + + if (!stbi__check_png_header(s)) + return 0; + + if (scan == STBI__SCAN_type) + return 1; + + for (;;) { + stbi__pngchunk c = stbi__get_chunk_header(s); + switch (c.type) { + case STBI__PNG_TYPE('C', 'g', 'B', 'I'): + is_iphone = 1; + stbi__skip(s, c.length); + break; + case STBI__PNG_TYPE('I', 'H', 'D', 'R'): { + int comp, filter; + if (!first) + return stbi__err("multiple IHDR", "Corrupt PNG"); + first = 0; + if (c.length != 13) + return stbi__err("bad IHDR len", "Corrupt PNG"); + s->img_x = stbi__get32be(s); + s->img_y = stbi__get32be(s); + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + z->depth = stbi__get8(s); + if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) + return stbi__err("1/2/4/8/16-bit only", "PNG not supported: 1/2/4/8/16-bit only"); + color = stbi__get8(s); + if (color > 6) + return stbi__err("bad ctype", "Corrupt PNG"); + if (color == 3 && z->depth == 16) + return stbi__err("bad ctype", "Corrupt PNG"); + if (color == 3) + pal_img_n = 3; + else if (color & 1) + return stbi__err("bad ctype", "Corrupt PNG"); + comp = stbi__get8(s); + if (comp) + return stbi__err("bad comp method", "Corrupt PNG"); + filter = stbi__get8(s); + if (filter) + return stbi__err("bad filter method", "Corrupt PNG"); + interlace = stbi__get8(s); + if (interlace > 1) + return stbi__err("bad interlace method", "Corrupt PNG"); + if (!s->img_x || !s->img_y) + return stbi__err("0-pixel image", "Corrupt PNG"); + if (!pal_img_n) { + s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); + if ((1 << 30) / s->img_x / s->img_n < s->img_y) + return stbi__err("too large", "Image too large to decode"); + } else { + // if paletted, then pal_n is our final components, and + // img_n is # components to decompress/filter. + s->img_n = 1; + if ((1 << 30) / s->img_x / 4 < s->img_y) + return stbi__err("too large", "Corrupt PNG"); + } + // even with SCAN_header, have to scan to see if we have a tRNS + break; + } + + case STBI__PNG_TYPE('P', 'L', 'T', 'E'): { + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (c.length > 256 * 3) + return stbi__err("invalid PLTE", "Corrupt PNG"); + pal_len = c.length / 3; + if (pal_len * 3 != c.length) + return stbi__err("invalid PLTE", "Corrupt PNG"); + for (i = 0; i < pal_len; ++i) { + palette[i * 4 + 0] = stbi__get8(s); + palette[i * 4 + 1] = stbi__get8(s); + palette[i * 4 + 2] = stbi__get8(s); + palette[i * 4 + 3] = 255; + } + break; + } + + case STBI__PNG_TYPE('t', 'R', 'N', 'S'): { + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (z->idata) + return stbi__err("tRNS after IDAT", "Corrupt PNG"); + if (pal_img_n) { + if (scan == STBI__SCAN_header) { + s->img_n = 4; + return 1; + } + if (pal_len == 0) + return stbi__err("tRNS before PLTE", "Corrupt PNG"); + if (c.length > pal_len) + return stbi__err("bad tRNS len", "Corrupt PNG"); + pal_img_n = 4; + for (i = 0; i < c.length; ++i) + palette[i * 4 + 3] = stbi__get8(s); + } else { + if (!(s->img_n & 1)) + return stbi__err("tRNS with alpha", "Corrupt PNG"); + if (c.length != (stbi__uint32)s->img_n * 2) + return stbi__err("bad tRNS len", "Corrupt PNG"); + has_trans = 1; + // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now. + if (scan == STBI__SCAN_header) { + ++s->img_n; + return 1; + } + if (z->depth == 16) { + for (k = 0; k < s->img_n; ++k) + tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is + } else { + for (k = 0; k < s->img_n; ++k) + tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * + stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger + } + } + break; + } + + case STBI__PNG_TYPE('I', 'D', 'A', 'T'): { + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (pal_img_n && !pal_len) + return stbi__err("no PLTE", "Corrupt PNG"); + if (scan == STBI__SCAN_header) { + // header scan definitely stops at first IDAT + if (pal_img_n) + s->img_n = pal_img_n; + return 1; + } + if (c.length > (1u << 30)) + return stbi__err("IDAT size limit", "IDAT section larger than 2^30 bytes"); + if ((int)(ioff + c.length) < (int)ioff) + return 0; + if (ioff + c.length > idata_limit) { + stbi__uint32 idata_limit_old = idata_limit; + stbi_uc * p; + if (idata_limit == 0) + idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; + STBI_NOTUSED(idata_limit_old); + p = (stbi_uc *)STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); + if (p == NULL) + return stbi__err("outofmem", "Out of memory"); + z->idata = p; + } + if (!stbi__getn(s, z->idata + ioff, c.length)) + return stbi__err("outofdata", "Corrupt PNG"); + ioff += c.length; + break; + } + + case STBI__PNG_TYPE('I', 'E', 'N', 'D'): { + stbi__uint32 raw_len, bpl; + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (scan != STBI__SCAN_load) + return 1; + if (z->idata == NULL) + return stbi__err("no IDAT", "Corrupt PNG"); + // initial guess for decoded data size to avoid unnecessary reallocs + bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component + raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; + z->expanded = (stbi_uc *)stbi_zlib_decode_malloc_guesssize_headerflag((char *)z->idata, ioff, raw_len, + (int *)&raw_len, !is_iphone); + if (z->expanded == NULL) + return 0; // zlib should set error + STBI_FREE(z->idata); + z->idata = NULL; + if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) || has_trans) + s->img_out_n = s->img_n + 1; + else + s->img_out_n = s->img_n; + if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) + return 0; + if (has_trans) { + if (z->depth == 16) { + if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) + return 0; + } else { + if (!stbi__compute_transparency(z, tc, s->img_out_n)) + return 0; + } + } + if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) + stbi__de_iphone(z); + if (pal_img_n) { + // pal_img_n == 3 or 4 + s->img_n = pal_img_n; // record the actual colors we had + s->img_out_n = pal_img_n; + if (req_comp >= 3) + s->img_out_n = req_comp; + if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) + return 0; + } else if (has_trans) { + // non-paletted image with tRNS -> source image has (constant) alpha + ++s->img_n; + } + STBI_FREE(z->expanded); + z->expanded = NULL; + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + return 1; + } + + default: + // if critical, fail + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if ((c.type & (1 << 29)) == 0) { +#ifndef STBI_NO_FAILURE_STRINGS + // not threadsafe + static char invalid_chunk[] = "XXXX PNG chunk not known"; + invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); + invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); + invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); + invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); +#endif + return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); + } + stbi__skip(s, c.length); + break; + } + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + } +} + +static void * stbi__do_png(stbi__png * p, int * x, int * y, int * n, int req_comp, stbi__result_info * ri) { + void * result = NULL; + if (req_comp < 0 || req_comp > 4) + return stbi__errpuc("bad req_comp", "Internal error"); + if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { + if (p->depth <= 8) + ri->bits_per_channel = 8; + else if (p->depth == 16) + ri->bits_per_channel = 16; + else + return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth"); + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s->img_out_n) { + if (ri->bits_per_channel == 8) + result = stbi__convert_format((unsigned char *)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + else + result = stbi__convert_format16((stbi__uint16 *)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + p->s->img_out_n = req_comp; + if (result == NULL) + return result; + } + *x = p->s->img_x; + *y = p->s->img_y; + if (n) + *n = p->s->img_n; + } + STBI_FREE(p->out); + p->out = NULL; + STBI_FREE(p->expanded); + p->expanded = NULL; + STBI_FREE(p->idata); + p->idata = NULL; + + return result; +} + +static void * stbi__png_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi__png p; + p.s = s; + return stbi__do_png(&p, x, y, comp, req_comp, ri); +} + +static int stbi__png_test(stbi__context * s) { + int r; + r = stbi__check_png_header(s); + stbi__rewind(s); + return r; +} + +static int stbi__png_info_raw(stbi__png * p, int * x, int * y, int * comp) { + if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { + stbi__rewind(p->s); + return 0; + } + if (x) + *x = p->s->img_x; + if (y) + *y = p->s->img_y; + if (comp) + *comp = p->s->img_n; + return 1; +} + +static int stbi__png_info(stbi__context * s, int * x, int * y, int * comp) { + stbi__png p; + p.s = s; + return stbi__png_info_raw(&p, x, y, comp); +} + +static int stbi__png_is16(stbi__context * s) { + stbi__png p; + p.s = s; + if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) + return 0; + if (p.depth != 16) { + stbi__rewind(p.s); + return 0; + } + return 1; +} +#endif + +// Microsoft/Windows BMP image + +#ifndef STBI_NO_BMP +static int stbi__bmp_test_raw(stbi__context * s) { + int r; + int sz; + if (stbi__get8(s) != 'B') + return 0; + if (stbi__get8(s) != 'M') + return 0; + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + stbi__get32le(s); // discard data offset + sz = stbi__get32le(s); + r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); + return r; +} + +static int stbi__bmp_test(stbi__context * s) { + int r = stbi__bmp_test_raw(s); + stbi__rewind(s); + return r; +} + +// returns 0..31 for the highest set bit +static int stbi__high_bit(unsigned int z) { + int n = 0; + if (z == 0) + return -1; + if (z >= 0x10000) { + n += 16; + z >>= 16; + } + if (z >= 0x00100) { + n += 8; + z >>= 8; + } + if (z >= 0x00010) { + n += 4; + z >>= 4; + } + if (z >= 0x00004) { + n += 2; + z >>= 2; + } + if (z >= 0x00002) { + n += 1; /* >>= 1;*/ + } + return n; +} + +static int stbi__bitcount(unsigned int a) { + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +// extract an arbitrarily-aligned N-bit value (N=bits) +// from v, and then make it 8-bits long and fractionally +// extend it to full full range. +static int stbi__shiftsigned(unsigned int v, int shift, int bits) { + static unsigned int mul_table[9] = { + 0, + 0xff /*0b11111111*/, + 0x55 /*0b01010101*/, + 0x49 /*0b01001001*/, + 0x11 /*0b00010001*/, + 0x21 /*0b00100001*/, + 0x41 /*0b01000001*/, + 0x81 /*0b10000001*/, + 0x01 /*0b00000001*/, + }; + static unsigned int shift_table[9] = { + 0, 0, 0, 1, 0, 2, 4, 6, 0, + }; + if (shift < 0) + v <<= -shift; + else + v >>= shift; + STBI_ASSERT(v < 256); + v >>= (8 - bits); + STBI_ASSERT(bits >= 0 && bits <= 8); + return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits]; +} + +typedef struct { + int bpp, offset, hsz; + unsigned int mr, mg, mb, ma, all_a; + int extra_read; +} stbi__bmp_data; + +static int stbi__bmp_set_mask_defaults(stbi__bmp_data * info, int compress) { + // BI_BITFIELDS specifies masks explicitly, don't override + if (compress == 3) + return 1; + + if (compress == 0) { + if (info->bpp == 16) { + info->mr = 31u << 10; + info->mg = 31u << 5; + info->mb = 31u << 0; + } else if (info->bpp == 32) { + info->mr = 0xffu << 16; + info->mg = 0xffu << 8; + info->mb = 0xffu << 0; + info->ma = 0xffu << 24; + info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 + } else { + // otherwise, use defaults, which is all-0 + info->mr = info->mg = info->mb = info->ma = 0; + } + return 1; + } + return 0; // error +} + +static void * stbi__bmp_parse_header(stbi__context * s, stbi__bmp_data * info) { + int hsz; + if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') + return stbi__errpuc("not BMP", "Corrupt BMP"); + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + info->offset = stbi__get32le(s); + info->hsz = hsz = stbi__get32le(s); + info->mr = info->mg = info->mb = info->ma = 0; + info->extra_read = 14; + + if (info->offset < 0) + return stbi__errpuc("bad BMP", "bad BMP"); + + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) + return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); + s->img_y = stbi__get16le(s); + } else { + s->img_x = stbi__get32le(s); + s->img_y = stbi__get32le(s); + } + if (stbi__get16le(s) != 1) + return stbi__errpuc("bad BMP", "bad BMP"); + info->bpp = stbi__get16le(s); + if (hsz != 12) { + int compress = stbi__get32le(s); + if (compress == 1 || compress == 2) + return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); + if (compress >= 4) + return stbi__errpuc("BMP JPEG/PNG", + "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes + if (compress == 3 && info->bpp != 16 && info->bpp != 32) + return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel + stbi__get32le(s); // discard sizeof + stbi__get32le(s); // discard hres + stbi__get32le(s); // discard vres + stbi__get32le(s); // discard colorsused + stbi__get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + } + if (info->bpp == 16 || info->bpp == 32) { + if (compress == 0) { + stbi__bmp_set_mask_defaults(info, compress); + } else if (compress == 3) { + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->extra_read += 12; + // not documented, but generated by photoshop and handled by mspaint + if (info->mr == info->mg && info->mg == info->mb) { + // ?!?!? + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else { + // V4/V5 header + int i; + if (hsz != 108 && hsz != 124) + return stbi__errpuc("bad BMP", "bad BMP"); + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->ma = stbi__get32le(s); + if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs + stbi__bmp_set_mask_defaults(info, compress); + stbi__get32le(s); // discard color space + for (i = 0; i < 12; ++i) + stbi__get32le(s); // discard color space parameters + if (hsz == 124) { + stbi__get32le(s); // discard rendering intent + stbi__get32le(s); // discard offset of profile data + stbi__get32le(s); // discard size of profile data + stbi__get32le(s); // discard reserved + } + } + } + return (void *)1; +} + +static void * stbi__bmp_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * out; + unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a; + stbi_uc pal[256][4]; + int psize = 0, i, j, width; + int flip_vertically, pad, target; + stbi__bmp_data info; + STBI_NOTUSED(ri); + + info.all_a = 255; + if (stbi__bmp_parse_header(s, &info) == NULL) + return NULL; // error code already set + + flip_vertically = ((int)s->img_y) > 0; + s->img_y = abs((int)s->img_y); + + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + mr = info.mr; + mg = info.mg; + mb = info.mb; + ma = info.ma; + all_a = info.all_a; + + if (info.hsz == 12) { + if (info.bpp < 24) + psize = (info.offset - info.extra_read - 24) / 3; + } else { + if (info.bpp < 16) + psize = (info.offset - info.extra_read - info.hsz) >> 2; + } + if (psize == 0) { + // accept some number of extra bytes after the header, but if the offset points either to before + // the header ends or implies a large amount of extra data, reject the file as malformed + int bytes_read_so_far = s->callback_already_read + (int)(s->img_buffer - s->img_buffer_original); + int header_limit = 1024; // max we actually read is below 256 bytes currently. + int extra_data_limit = 256 * 4; // what ordinarily goes here is a palette; 256 entries*4 bytes is its max size. + if (bytes_read_so_far <= 0 || bytes_read_so_far > header_limit) { + return stbi__errpuc("bad header", "Corrupt BMP"); + } + // we established that bytes_read_so_far is positive and sensible. + // the first half of this test rejects offsets that are either too small positives, or + // negative, and guarantees that info.offset >= bytes_read_so_far > 0. this in turn + // ensures the number computed in the second half of the test can't overflow. + if (info.offset < bytes_read_so_far || info.offset - bytes_read_so_far > extra_data_limit) { + return stbi__errpuc("bad offset", "Corrupt BMP"); + } else { + stbi__skip(s, info.offset - bytes_read_so_far); + } + } + + if (info.bpp == 24 && ma == 0xff000000) + s->img_n = 3; + else + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + + // sanity-check size + if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) + return stbi__errpuc("too large", "Corrupt BMP"); + + out = (stbi_uc *)stbi__malloc_mad3(target, s->img_x, s->img_y, 0); + if (!out) + return stbi__errpuc("outofmem", "Out of memory"); + if (info.bpp < 16) { + int z = 0; + if (psize == 0 || psize > 256) { + STBI_FREE(out); + return stbi__errpuc("invalid", "Corrupt BMP"); + } + for (i = 0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + if (info.hsz != 12) + stbi__get8(s); + pal[i][3] = 255; + } + stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); + if (info.bpp == 1) + width = (s->img_x + 7) >> 3; + else if (info.bpp == 4) + width = (s->img_x + 1) >> 1; + else if (info.bpp == 8) + width = s->img_x; + else { + STBI_FREE(out); + return stbi__errpuc("bad bpp", "Corrupt BMP"); + } + pad = (-width) & 3; + if (info.bpp == 1) { + for (j = 0; j < (int)s->img_y; ++j) { + int bit_offset = 7, v = stbi__get8(s); + for (i = 0; i < (int)s->img_x; ++i) { + int color = (v >> bit_offset) & 0x1; + out[z++] = pal[color][0]; + out[z++] = pal[color][1]; + out[z++] = pal[color][2]; + if (target == 4) + out[z++] = 255; + if (i + 1 == (int)s->img_x) + break; + if ((--bit_offset) < 0) { + bit_offset = 7; + v = stbi__get8(s); + } + } + stbi__skip(s, pad); + } + } else { + for (j = 0; j < (int)s->img_y; ++j) { + for (i = 0; i < (int)s->img_x; i += 2) { + int v = stbi__get8(s), v2 = 0; + if (info.bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) + out[z++] = 255; + if (i + 1 == (int)s->img_x) + break; + v = (info.bpp == 8) ? stbi__get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) + out[z++] = 255; + } + stbi__skip(s, pad); + } + } + } else { + int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0, gcount = 0, bcount = 0, acount = 0; + int z = 0; + int easy = 0; + stbi__skip(s, info.offset - info.extra_read - info.hsz); + if (info.bpp == 24) + width = 3 * s->img_x; + else if (info.bpp == 16) + width = 2 * s->img_x; + else /* bpp = 32 and pad = 0 */ + width = 0; + pad = (-width) & 3; + if (info.bpp == 24) { + easy = 1; + } else if (info.bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) { + STBI_FREE(out); + return stbi__errpuc("bad masks", "Corrupt BMP"); + } + // right shift amt to put high bit in position #7 + rshift = stbi__high_bit(mr) - 7; + rcount = stbi__bitcount(mr); + gshift = stbi__high_bit(mg) - 7; + gcount = stbi__bitcount(mg); + bshift = stbi__high_bit(mb) - 7; + bcount = stbi__bitcount(mb); + ashift = stbi__high_bit(ma) - 7; + acount = stbi__bitcount(ma); + if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { + STBI_FREE(out); + return stbi__errpuc("bad masks", "Corrupt BMP"); + } + } + for (j = 0; j < (int)s->img_y; ++j) { + if (easy) { + for (i = 0; i < (int)s->img_x; ++i) { + unsigned char a; + out[z + 2] = stbi__get8(s); + out[z + 1] = stbi__get8(s); + out[z + 0] = stbi__get8(s); + z += 3; + a = (easy == 2 ? stbi__get8(s) : 255); + all_a |= a; + if (target == 4) + out[z++] = a; + } + } else { + int bpp = info.bpp; + for (i = 0; i < (int)s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s) : stbi__get32le(s)); + unsigned int a; + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); + a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); + all_a |= a; + if (target == 4) + out[z++] = STBI__BYTECAST(a); + } + } + stbi__skip(s, pad); + } + } + + // if alpha channel is all 0s, replace with all 255s + if (target == 4 && all_a == 0) + for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4) + out[i] = 255; + + if (flip_vertically) { + stbi_uc t; + for (j = 0; j < (int)s->img_y >> 1; ++j) { + stbi_uc * p1 = out + j * s->img_x * target; + stbi_uc * p2 = out + (s->img_y - 1 - j) * s->img_x * target; + for (i = 0; i < (int)s->img_x * target; ++i) { + t = p1[i]; + p1[i] = p2[i]; + p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) + return out; // stbi__convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) + *comp = s->img_n; + return out; +} +#endif + +// Targa Truevision - TGA +// by Jonathan Dummer +#ifndef STBI_NO_TGA +// returns STBI_rgb or whatever, 0 on error +static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int * is_rgb16) { + // only RGB or RGBA (incl. 16bit) or grey allowed + if (is_rgb16) + *is_rgb16 = 0; + switch (bits_per_pixel) { + case 8: + return STBI_grey; + case 16: + if (is_grey) + return STBI_grey_alpha; + // fallthrough + case 15: + if (is_rgb16) + *is_rgb16 = 1; + return STBI_rgb; + case 24: // fallthrough + case 32: + return bits_per_pixel / 8; + default: + return 0; + } +} + +static int stbi__tga_info(stbi__context * s, int * x, int * y, int * comp) { + int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; + int sz, tga_colormap_type; + stbi__get8(s); // discard Offset + tga_colormap_type = stbi__get8(s); // colormap type + if (tga_colormap_type > 1) { + stbi__rewind(s); + return 0; // only RGB or indexed allowed + } + tga_image_type = stbi__get8(s); // image type + if (tga_colormap_type == 1) { // colormapped (paletted) image + if (tga_image_type != 1 && tga_image_type != 9) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 4); // skip image x and y origin + tga_colormap_bpp = sz; + } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE + if ((tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11)) { + stbi__rewind(s); + return 0; // only RGB or grey allowed, +/- RLE + } + stbi__skip(s, 9); // skip colormap specification and image x/y origin + tga_colormap_bpp = 0; + } + tga_w = stbi__get16le(s); + if (tga_w < 1) { + stbi__rewind(s); + return 0; // test width + } + tga_h = stbi__get16le(s); + if (tga_h < 1) { + stbi__rewind(s); + return 0; // test height + } + tga_bits_per_pixel = stbi__get8(s); // bits per pixel + stbi__get8(s); // ignore alpha bits + if (tga_colormap_bpp != 0) { + if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { + // when using a colormap, tga_bits_per_pixel is the size of the indexes + // I don't think anything but 8 or 16bit indexes makes sense + stbi__rewind(s); + return 0; + } + tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); + } else { + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); + } + if (!tga_comp) { + stbi__rewind(s); + return 0; + } + if (x) + *x = tga_w; + if (y) + *y = tga_h; + if (comp) + *comp = tga_comp; + return 1; // seems to have passed everything +} + +static int stbi__tga_test(stbi__context * s) { + int res = 0; + int sz, tga_color_type; + stbi__get8(s); // discard Offset + tga_color_type = stbi__get8(s); // color type + if (tga_color_type > 1) + goto errorEnd; // only RGB or indexed allowed + sz = stbi__get8(s); // image type + if (tga_color_type == 1) { // colormapped (paletted) image + if (sz != 1 && sz != 9) + goto errorEnd; // colortype 1 demands image type 1 or 9 + stbi__skip(s, 4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) + goto errorEnd; + stbi__skip(s, 4); // skip image x and y origin + } else { // "normal" image w/o colormap + if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11)) + goto errorEnd; // only RGB or grey allowed, +/- RLE + stbi__skip(s, 9); // skip colormap specification and image x/y origin + } + if (stbi__get16le(s) < 1) + goto errorEnd; // test width + if (stbi__get16le(s) < 1) + goto errorEnd; // test height + sz = stbi__get8(s); // bits per pixel + if ((tga_color_type == 1) && (sz != 8) && (sz != 16)) + goto errorEnd; // for colormapped images, bpp is size of an index + if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) + goto errorEnd; + + res = 1; // if we got this far, everything's good and we can return 1 instead of 0 + +errorEnd: + stbi__rewind(s); + return res; +} + +// read 16bit value and convert to 24bit RGB +static void stbi__tga_read_rgb16(stbi__context * s, stbi_uc * out) { + stbi__uint16 px = (stbi__uint16)stbi__get16le(s); + stbi__uint16 fiveBitMask = 31; + // we have 3 channels with 5bits each + int r = (px >> 10) & fiveBitMask; + int g = (px >> 5) & fiveBitMask; + int b = px & fiveBitMask; + // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later + out[0] = (stbi_uc)((r * 255) / 31); + out[1] = (stbi_uc)((g * 255) / 31); + out[2] = (stbi_uc)((b * 255) / 31); + + // some people claim that the most significant bit might be used for alpha + // (possibly if an alpha-bit is set in the "image descriptor byte") + // but that only made 16bit test images completely translucent.. + // so let's treat all 15 and 16bit TGAs as RGB with no alpha. +} + +static void * stbi__tga_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + // read in the TGA header stuff + int tga_offset = stbi__get8(s); + int tga_indexed = stbi__get8(s); + int tga_image_type = stbi__get8(s); + int tga_is_RLE = 0; + int tga_palette_start = stbi__get16le(s); + int tga_palette_len = stbi__get16le(s); + int tga_palette_bits = stbi__get8(s); + int tga_x_origin = stbi__get16le(s); + int tga_y_origin = stbi__get16le(s); + int tga_width = stbi__get16le(s); + int tga_height = stbi__get16le(s); + int tga_bits_per_pixel = stbi__get8(s); + int tga_comp, tga_rgb16 = 0; + int tga_inverted = stbi__get8(s); + // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) + // image data + unsigned char * tga_data; + unsigned char * tga_palette = NULL; + int i, j; + unsigned char raw_data[4] = {0}; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + STBI_NOTUSED(ri); + STBI_NOTUSED(tga_x_origin); // @TODO + STBI_NOTUSED(tga_y_origin); // @TODO + + if (tga_height > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (tga_width > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + // do a tiny bit of precessing + if (tga_image_type >= 8) { + tga_image_type -= 8; + tga_is_RLE = 1; + } + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // If I'm paletted, then I'll use the number of bits from the palette + if (tga_indexed) + tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); + else + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); + + if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency + return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) + *comp = tga_comp; + + if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) + return stbi__errpuc("too large", "Corrupt TGA"); + + tga_data = (unsigned char *)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); + if (!tga_data) + return stbi__errpuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + stbi__skip(s, tga_offset); + + if (!tga_indexed && !tga_is_RLE && !tga_rgb16) { + for (i = 0; i < tga_height; ++i) { + int row = tga_inverted ? tga_height - i - 1 : i; + stbi_uc * tga_row = tga_data + row * tga_width * tga_comp; + stbi__getn(s, tga_row, tga_width * tga_comp); + } + } else { + // do I need to load a palette? + if (tga_indexed) { + if (tga_palette_len == 0) { /* you have to have at least one entry! */ + STBI_FREE(tga_data); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + + // any data to skip? (offset usually = 0) + stbi__skip(s, tga_palette_start); + // load the palette + tga_palette = (unsigned char *)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); + if (!tga_palette) { + STBI_FREE(tga_data); + return stbi__errpuc("outofmem", "Out of memory"); + } + if (tga_rgb16) { + stbi_uc * pal_entry = tga_palette; + STBI_ASSERT(tga_comp == STBI_rgb); + for (i = 0; i < tga_palette_len; ++i) { + stbi__tga_read_rgb16(s, pal_entry); + pal_entry += tga_comp; + } + } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { + STBI_FREE(tga_data); + STBI_FREE(tga_palette); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + } + // load the data + for (i = 0; i < tga_width * tga_height; ++i) { + // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? + if (tga_is_RLE) { + if (RLE_count == 0) { + // yep, get the next byte as a RLE command + int RLE_cmd = stbi__get8(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if (!RLE_repeating) { + read_next_pixel = 1; + } + } else { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if (read_next_pixel) { + // load however much data we did have + if (tga_indexed) { + // read in index, then perform the lookup + int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); + if (pal_idx >= tga_palette_len) { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_comp; + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = tga_palette[pal_idx + j]; + } + } else if (tga_rgb16) { + STBI_ASSERT(tga_comp == STBI_rgb); + stbi__tga_read_rgb16(s, raw_data); + } else { + // read in the data raw + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = stbi__get8(s); + } + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + + // copy data + for (j = 0; j < tga_comp; ++j) + tga_data[i * tga_comp + j] = raw_data[j]; + + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if (tga_inverted) { + for (j = 0; j * 2 < tga_height; ++j) { + int index1 = j * tga_width * tga_comp; + int index2 = (tga_height - 1 - j) * tga_width * tga_comp; + for (i = tga_width * tga_comp; i > 0; --i) { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if (tga_palette != NULL) { + STBI_FREE(tga_palette); + } + } + + // swap RGB - if the source data was RGB16, it already is in the right order + if (tga_comp >= 3 && !tga_rgb16) { + unsigned char * tga_pixel = tga_data; + for (i = 0; i < tga_width * tga_height; ++i) { + unsigned char temp = tga_pixel[0]; + tga_pixel[0] = tga_pixel[2]; + tga_pixel[2] = temp; + tga_pixel += tga_comp; + } + } + + // convert to target component count + if (req_comp && req_comp != tga_comp) + tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); + + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin = tga_y_origin = 0; + STBI_NOTUSED(tga_palette_start); + // OK, done + return tga_data; +} +#endif + +// ************************************************************************************************* +// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context * s) { + int r = (stbi__get32be(s) == 0x38425053); + stbi__rewind(s); + return r; +} + +static int stbi__psd_decode_rle(stbi__context * s, stbi_uc * p, int pixelCount) { + int count, nleft, len; + + count = 0; + while ((nleft = pixelCount - count) > 0) { + len = stbi__get8(s); + if (len == 128) { + // No-op. + } else if (len < 128) { + // Copy next len+1 bytes literally. + len++; + if (len > nleft) + return 0; // corrupt data + count += len; + while (len) { + *p = stbi__get8(s); + p += 4; + len--; + } + } else if (len > 128) { + stbi_uc val; + // Next -len+1 bytes in the dest are replicated from next source byte. + // (Interpret len as a negative 8-bit int.) + len = 257 - len; + if (len > nleft) + return 0; // corrupt data + val = stbi__get8(s); + count += len; + while (len) { + *p = val; + p += 4; + len--; + } + } + } + + return 1; +} + +static void * stbi__psd_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri, int bpc) { + int pixelCount; + int channelCount, compression; + int channel, i; + int bitdepth; + int w, h; + stbi_uc * out; + STBI_NOTUSED(ri); + + // Check identifier + if (stbi__get32be(s) != 0x38425053) // "8BPS" + return stbi__errpuc("not PSD", "Corrupt PSD image"); + + // Check file type version. + if (stbi__get16be(s) != 1) + return stbi__errpuc("wrong version", "Unsupported version of PSD image"); + + // Skip 6 reserved bytes. + stbi__skip(s, 6); + + // Read the number of channels (R, G, B, A, etc). + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) + return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); + + // Read the rows and columns of the image. + h = stbi__get32be(s); + w = stbi__get32be(s); + + if (h > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (w > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + // Make sure the depth is 8 bits. + bitdepth = stbi__get16be(s); + if (bitdepth != 8 && bitdepth != 16) + return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); + + // Make sure the color mode is RGB. + // Valid options are: + // 0: Bitmap + // 1: Grayscale + // 2: Indexed color + // 3: RGB color + // 4: CMYK color + // 7: Multichannel + // 8: Duotone + // 9: Lab color + if (stbi__get16be(s) != 3) + return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); + + // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) + stbi__skip(s, stbi__get32be(s)); + + // Skip the image resources. (resolution, pen tool paths, etc) + stbi__skip(s, stbi__get32be(s)); + + // Skip the reserved data. + stbi__skip(s, stbi__get32be(s)); + + // Find out if the data is compressed. + // Known values: + // 0: no compression + // 1: RLE compressed + compression = stbi__get16be(s); + if (compression > 1) + return stbi__errpuc("bad compression", "PSD has an unknown compression format"); + + // Check size + if (!stbi__mad3sizes_valid(4, w, h, 0)) + return stbi__errpuc("too large", "Corrupt PSD"); + + // Create the destination image. + + if (!compression && bitdepth == 16 && bpc == 16) { + out = (stbi_uc *)stbi__malloc_mad3(8, w, h, 0); + ri->bits_per_channel = 16; + } else + out = (stbi_uc *)stbi__malloc(4 * w * h); + + if (!out) + return stbi__errpuc("outofmem", "Out of memory"); + pixelCount = w * h; + + // Initialize the data to zero. + // memset( out, 0, pixelCount * 4 ); + + // Finally, the image data. + if (compression) { + // RLE as used by .PSD and .TIFF + // Loop until you get the number of unpacked bytes you are expecting: + // Read the next source byte into n. + // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. + // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. + // Else if n is 128, noop. + // Endloop + + // The RLE-compressed data is preceded by a 2-byte data count for each row in the data, + // which we're going to just skip. + stbi__skip(s, h * channelCount * 2); + + // Read the RLE data by channel. + for (channel = 0; channel < 4; channel++) { + stbi_uc * p; + + p = out + channel; + if (channel >= channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++, p += 4) + *p = (channel == 3 ? 255 : 0); + } else { + // Read the RLE data. + if (!stbi__psd_decode_rle(s, p, pixelCount)) { + STBI_FREE(out); + return stbi__errpuc("corrupt", "bad RLE data"); + } + } + } + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) + // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { + if (channel >= channelCount) { + // Fill this channel with default data. + if (bitdepth == 16 && bpc == 16) { + stbi__uint16 * q = ((stbi__uint16 *)out) + channel; + stbi__uint16 val = channel == 3 ? 65535 : 0; + for (i = 0; i < pixelCount; i++, q += 4) + *q = val; + } else { + stbi_uc * p = out + channel; + stbi_uc val = channel == 3 ? 255 : 0; + for (i = 0; i < pixelCount; i++, p += 4) + *p = val; + } + } else { + if (ri->bits_per_channel == 16) { // output bpc + stbi__uint16 * q = ((stbi__uint16 *)out) + channel; + for (i = 0; i < pixelCount; i++, q += 4) + *q = (stbi__uint16)stbi__get16be(s); + } else { + stbi_uc * p = out + channel; + if (bitdepth == 16) { // input bpc + for (i = 0; i < pixelCount; i++, p += 4) + *p = (stbi_uc)(stbi__get16be(s) >> 8); + } else { + for (i = 0; i < pixelCount; i++, p += 4) + *p = stbi__get8(s); + } + } + } + } + } + + // remove weird white matte from PSD + if (channelCount >= 4) { + if (ri->bits_per_channel == 16) { + for (i = 0; i < w * h; ++i) { + stbi__uint16 * pixel = (stbi__uint16 *)out + 4 * i; + if (pixel[3] != 0 && pixel[3] != 65535) { + float a = pixel[3] / 65535.0f; + float ra = 1.0f / a; + float inv_a = 65535.0f * (1 - ra); + pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a); + pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a); + pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a); + } + } + } else { + for (i = 0; i < w * h; ++i) { + unsigned char * pixel = out + 4 * i; + if (pixel[3] != 0 && pixel[3] != 255) { + float a = pixel[3] / 255.0f; + float ra = 1.0f / a; + float inv_a = 255.0f * (1 - ra); + pixel[0] = (unsigned char)(pixel[0] * ra + inv_a); + pixel[1] = (unsigned char)(pixel[1] * ra + inv_a); + pixel[2] = (unsigned char)(pixel[2] * ra + inv_a); + } + } + } + } + + // convert to desired output format + if (req_comp && req_comp != 4) { + if (ri->bits_per_channel == 16) + out = (stbi_uc *)stbi__convert_format16((stbi__uint16 *)out, 4, req_comp, w, h); + else + out = stbi__convert_format(out, 4, req_comp, w, h); + if (out == NULL) + return out; // stbi__convert_format frees input on failure + } + + if (comp) + *comp = 4; + *y = h; + *x = w; + + return out; +} +#endif + +// ************************************************************************************************* +// Softimage PIC loader +// by Tom Seddon +// +// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format +// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ + +#ifndef STBI_NO_PIC +static int stbi__pic_is4(stbi__context * s, const char * str) { + int i; + for (i = 0; i < 4; ++i) + if (stbi__get8(s) != (stbi_uc)str[i]) + return 0; + + return 1; +} + +static int stbi__pic_test_core(stbi__context * s) { + int i; + + if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) + return 0; + + for (i = 0; i < 84; ++i) + stbi__get8(s); + + if (!stbi__pic_is4(s, "PICT")) + return 0; + + return 1; +} + +typedef struct { + stbi_uc size, type, channel; +} stbi__pic_packet; + +static stbi_uc * stbi__readval(stbi__context * s, int channel, stbi_uc * dest) { + int mask = 0x80, i; + + for (i = 0; i < 4; ++i, mask >>= 1) { + if (channel & mask) { + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "PIC file too short"); + dest[i] = stbi__get8(s); + } + } + + return dest; +} + +static void stbi__copyval(int channel, stbi_uc * dest, const stbi_uc * src) { + int mask = 0x80, i; + + for (i = 0; i < 4; ++i, mask >>= 1) + if (channel & mask) + dest[i] = src[i]; +} + +static stbi_uc * stbi__pic_load_core(stbi__context * s, int width, int height, int * comp, stbi_uc * result) { + int act_comp = 0, num_packets = 0, y, chained; + stbi__pic_packet packets[10]; + + // this will (should...) cater for even some bizarre stuff like having data + // for the same channel in multiple packets. + do { + stbi__pic_packet * packet; + + if (num_packets == sizeof(packets) / sizeof(packets[0])) + return stbi__errpuc("bad format", "too many packets"); + + packet = &packets[num_packets++]; + + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + + act_comp |= packet->channel; + + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (reading packets)"); + if (packet->size != 8) + return stbi__errpuc("bad format", "packet isn't 8bpp"); + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? + + for (y = 0; y < height; ++y) { + int packet_idx; + + for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) { + stbi__pic_packet * packet = &packets[packet_idx]; + stbi_uc * dest = result + y * width * 4; + + switch (packet->type) { + default: + return stbi__errpuc("bad format", "packet has bad compression type"); + + case 0: { // uncompressed + int x; + + for (x = 0; x < width; ++x, dest += 4) + if (!stbi__readval(s, packet->channel, dest)) + return 0; + break; + } + + case 1: // Pure RLE + { + int left = width, i; + + while (left > 0) { + stbi_uc count, value[4]; + + count = stbi__get8(s); + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (pure read count)"); + + if (count > left) + count = (stbi_uc)left; + + if (!stbi__readval(s, packet->channel, value)) + return 0; + + for (i = 0; i < count; ++i, dest += 4) + stbi__copyval(packet->channel, dest, value); + left -= count; + } + } break; + + case 2: { // Mixed RLE + int left = width; + while (left > 0) { + int count = stbi__get8(s), i; + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (mixed read count)"); + + if (count >= 128) { // Repeated + stbi_uc value[4]; + + if (count == 128) + count = stbi__get16be(s); + else + count -= 127; + if (count > left) + return stbi__errpuc("bad file", "scanline overrun"); + + if (!stbi__readval(s, packet->channel, value)) + return 0; + + for (i = 0; i < count; ++i, dest += 4) + stbi__copyval(packet->channel, dest, value); + } else { // Raw + ++count; + if (count > left) + return stbi__errpuc("bad file", "scanline overrun"); + + for (i = 0; i < count; ++i, dest += 4) + if (!stbi__readval(s, packet->channel, dest)) + return 0; + } + left -= count; + } + break; + } + } + } + } + + return result; +} + +static void * stbi__pic_load(stbi__context * s, int * px, int * py, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * result; + int i, x, y, internal_comp; + STBI_NOTUSED(ri); + + if (!comp) + comp = &internal_comp; + + for (i = 0; i < 92; ++i) + stbi__get8(s); + + x = stbi__get16be(s); + y = stbi__get16be(s); + + if (y > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (x > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (pic header)"); + if (!stbi__mad3sizes_valid(x, y, 4, 0)) + return stbi__errpuc("too large", "PIC image too large to decode"); + + stbi__get32be(s); // skip `ratio' + stbi__get16be(s); // skip `fields' + stbi__get16be(s); // skip `pad' + + // intermediate buffer is RGBA + result = (stbi_uc *)stbi__malloc_mad3(x, y, 4, 0); + if (!result) + return stbi__errpuc("outofmem", "Out of memory"); + memset(result, 0xff, x * y * 4); + + if (!stbi__pic_load_core(s, x, y, comp, result)) { + STBI_FREE(result); + result = 0; + } + *px = x; + *py = y; + if (req_comp == 0) + req_comp = *comp; + result = stbi__convert_format(result, 4, req_comp, x, y); + + return result; +} + +static int stbi__pic_test(stbi__context * s) { + int r = stbi__pic_test_core(s); + stbi__rewind(s); + return r; +} +#endif + +// ************************************************************************************************* +// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb + +#ifndef STBI_NO_GIF +typedef struct { + stbi__int16 prefix; + stbi_uc first; + stbi_uc suffix; +} stbi__gif_lzw; + +typedef struct { + int w, h; + stbi_uc * out; // output buffer (always 4 components) + stbi_uc * background; // The current "background" as far as a gif is concerned + stbi_uc * history; + int flags, bgindex, ratio, transparent, eflags; + stbi_uc pal[256][4]; + stbi_uc lpal[256][4]; + stbi__gif_lzw codes[8192]; + stbi_uc * color_table; + int parse, step; + int lflags; + int start_x, start_y; + int max_x, max_y; + int cur_x, cur_y; + int line_size; + int delay; +} stbi__gif; + +static int stbi__gif_test_raw(stbi__context * s) { + int sz; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return 0; + sz = stbi__get8(s); + if (sz != '9' && sz != '7') + return 0; + if (stbi__get8(s) != 'a') + return 0; + return 1; +} + +static int stbi__gif_test(stbi__context * s) { + int r = stbi__gif_test_raw(s); + stbi__rewind(s); + return r; +} + +static void stbi__gif_parse_colortable(stbi__context * s, stbi_uc pal[256][4], int num_entries, int transp) { + int i; + for (i = 0; i < num_entries; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + pal[i][3] = transp == i ? 0 : 255; + } +} + +static int stbi__gif_header(stbi__context * s, stbi__gif * g, int * comp, int is_info) { + stbi_uc version; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return stbi__err("not GIF", "Corrupt GIF"); + + version = stbi__get8(s); + if (version != '7' && version != '9') + return stbi__err("not GIF", "Corrupt GIF"); + if (stbi__get8(s) != 'a') + return stbi__err("not GIF", "Corrupt GIF"); + + stbi__g_failure_reason = ""; + g->w = stbi__get16le(s); + g->h = stbi__get16le(s); + g->flags = stbi__get8(s); + g->bgindex = stbi__get8(s); + g->ratio = stbi__get8(s); + g->transparent = -1; + + if (g->w > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + if (g->h > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + + if (comp != 0) + *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments + + if (is_info) + return 1; + + if (g->flags & 0x80) + stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1); + + return 1; +} + +static int stbi__gif_info_raw(stbi__context * s, int * x, int * y, int * comp) { + stbi__gif * g = (stbi__gif *)stbi__malloc(sizeof(stbi__gif)); + if (!g) + return stbi__err("outofmem", "Out of memory"); + if (!stbi__gif_header(s, g, comp, 1)) { + STBI_FREE(g); + stbi__rewind(s); + return 0; + } + if (x) + *x = g->w; + if (y) + *y = g->h; + STBI_FREE(g); + return 1; +} + +static void stbi__out_gif_code(stbi__gif * g, stbi__uint16 code) { + stbi_uc *p, *c; + int idx; + + // recurse to decode the prefixes, since the linked-list is backwards, + // and working backwards through an interleaved image would be nasty + if (g->codes[code].prefix >= 0) + stbi__out_gif_code(g, g->codes[code].prefix); + + if (g->cur_y >= g->max_y) + return; + + idx = g->cur_x + g->cur_y; + p = &g->out[idx]; + g->history[idx / 4] = 1; + + c = &g->color_table[g->codes[code].suffix * 4]; + if (c[3] > 128) { // don't render transparent pixels; + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; + p[3] = c[3]; + } + g->cur_x += 4; + + if (g->cur_x >= g->max_x) { + g->cur_x = g->start_x; + g->cur_y += g->step; + + while (g->cur_y >= g->max_y && g->parse > 0) { + g->step = (1 << g->parse) * g->line_size; + g->cur_y = g->start_y + (g->step >> 1); + --g->parse; + } + } +} + +static stbi_uc * stbi__process_gif_raster(stbi__context * s, stbi__gif * g) { + stbi_uc lzw_cs; + stbi__int32 len, init_code; + stbi__uint32 first; + stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; + stbi__gif_lzw * p; + + lzw_cs = stbi__get8(s); + if (lzw_cs > 12) + return NULL; + clear = 1 << lzw_cs; + first = 1; + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + bits = 0; + valid_bits = 0; + for (init_code = 0; init_code < clear; init_code++) { + g->codes[init_code].prefix = -1; + g->codes[init_code].first = (stbi_uc)init_code; + g->codes[init_code].suffix = (stbi_uc)init_code; + } + + // support no starting clear code + avail = clear + 2; + oldcode = -1; + + len = 0; + for (;;) { + if (valid_bits < codesize) { + if (len == 0) { + len = stbi__get8(s); // start new block + if (len == 0) + return g->out; + } + --len; + bits |= (stbi__int32)stbi__get8(s) << valid_bits; + valid_bits += 8; + } else { + stbi__int32 code = bits & codemask; + bits >>= codesize; + valid_bits -= codesize; + // @OPTIMIZE: is there some way we can accelerate the non-clear path? + if (code == clear) { // clear code + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + avail = clear + 2; + oldcode = -1; + first = 0; + } else if (code == clear + 1) { // end of stream code + stbi__skip(s, len); + while ((len = stbi__get8(s)) > 0) + stbi__skip(s, len); + return g->out; + } else if (code <= avail) { + if (first) { + return stbi__errpuc("no clear code", "Corrupt GIF"); + } + + if (oldcode >= 0) { + p = &g->codes[avail++]; + if (avail > 8192) { + return stbi__errpuc("too many codes", "Corrupt GIF"); + } + + p->prefix = (stbi__int16)oldcode; + p->first = g->codes[oldcode].first; + p->suffix = (code == avail) ? p->first : g->codes[code].first; + } else if (code == avail) + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + + stbi__out_gif_code(g, (stbi__uint16)code); + + if ((avail & codemask) == 0 && avail <= 0x0FFF) { + codesize++; + codemask = (1 << codesize) - 1; + } + + oldcode = code; + } else { + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + } + } + } +} + +// this function is designed to support animated gifs, although stb_image doesn't support it +// two back is the image from two frames ago, used for a very specific disposal format +static stbi_uc * stbi__gif_load_next(stbi__context * s, stbi__gif * g, int * comp, int req_comp, stbi_uc * two_back) { + int dispose; + int first_frame; + int pi; + int pcount; + STBI_NOTUSED(req_comp); + + // on first frame, any non-written pixels get the background colour (non-transparent) + first_frame = 0; + if (g->out == 0) { + if (!stbi__gif_header(s, g, comp, 0)) + return 0; // stbi__g_failure_reason set by stbi__gif_header + if (!stbi__mad3sizes_valid(4, g->w, g->h, 0)) + return stbi__errpuc("too large", "GIF image is too large"); + pcount = g->w * g->h; + g->out = (stbi_uc *)stbi__malloc(4 * pcount); + g->background = (stbi_uc *)stbi__malloc(4 * pcount); + g->history = (stbi_uc *)stbi__malloc(pcount); + if (!g->out || !g->background || !g->history) + return stbi__errpuc("outofmem", "Out of memory"); + + // image is treated as "transparent" at the start - ie, nothing overwrites the current background; + // background colour is only used for pixels that are not rendered first frame, after that "background" + // color refers to the color that was there the previous frame. + memset(g->out, 0x00, 4 * pcount); + memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent) + memset(g->history, 0x00, pcount); // pixels that were affected previous frame + first_frame = 1; + } else { + // second frame - how do we dispose of the previous one? + dispose = (g->eflags & 0x1C) >> 2; + pcount = g->w * g->h; + + if ((dispose == 3) && (two_back == 0)) { + dispose = 2; // if I don't have an image to revert back to, default to the old background + } + + if (dispose == 3) { // use previous graphic + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy(&g->out[pi * 4], &two_back[pi * 4], 4); + } + } + } else if (dispose == 2) { + // restore what was changed last frame to background before that frame; + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy(&g->out[pi * 4], &g->background[pi * 4], 4); + } + } + } else { + // This is a non-disposal case eithe way, so just + // leave the pixels as is, and they will become the new background + // 1: do not dispose + // 0: not specified. + } + + // background is what out is after the undoing of the previou frame; + memcpy(g->background, g->out, 4 * g->w * g->h); + } + + // clear my history; + memset(g->history, 0x00, g->w * g->h); // pixels that were affected previous frame + + for (;;) { + int tag = stbi__get8(s); + switch (tag) { + case 0x2C: /* Image Descriptor */ + { + stbi__int32 x, y, w, h; + stbi_uc * o; + + x = stbi__get16le(s); + y = stbi__get16le(s); + w = stbi__get16le(s); + h = stbi__get16le(s); + if (((x + w) > (g->w)) || ((y + h) > (g->h))) + return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); + + g->line_size = g->w * 4; + g->start_x = x * 4; + g->start_y = y * g->line_size; + g->max_x = g->start_x + w * 4; + g->max_y = g->start_y + h * g->line_size; + g->cur_x = g->start_x; + g->cur_y = g->start_y; + + // if the width of the specified rectangle is 0, that means + // we may not see *any* pixels or the image is malformed; + // to make sure this is caught, move the current y down to + // max_y (which is what out_gif_code checks). + if (w == 0) + g->cur_y = g->max_y; + + g->lflags = stbi__get8(s); + + if (g->lflags & 0x40) { + g->step = 8 * g->line_size; // first interlaced spacing + g->parse = 3; + } else { + g->step = g->line_size; + g->parse = 0; + } + + if (g->lflags & 0x80) { + stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); + g->color_table = (stbi_uc *)g->lpal; + } else if (g->flags & 0x80) { + g->color_table = (stbi_uc *)g->pal; + } else + return stbi__errpuc("missing color table", "Corrupt GIF"); + + o = stbi__process_gif_raster(s, g); + if (!o) + return NULL; + + // if this was the first frame, + pcount = g->w * g->h; + if (first_frame && (g->bgindex > 0)) { + // if first frame, any pixel not drawn to gets the background color + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi] == 0) { + g->pal[g->bgindex][3] = + 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; + memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4); + } + } + } + + return o; + } + + case 0x21: // Comment Extension. + { + int len; + int ext = stbi__get8(s); + if (ext == 0xF9) { // Graphic Control Extension. + len = stbi__get8(s); + if (len == 4) { + g->eflags = stbi__get8(s); + g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. + + // unset old transparent + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 255; + } + if (g->eflags & 0x01) { + g->transparent = stbi__get8(s); + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 0; + } + } else { + // don't need transparent + stbi__skip(s, 1); + g->transparent = -1; + } + } else { + stbi__skip(s, len); + break; + } + } + while ((len = stbi__get8(s)) != 0) { + stbi__skip(s, len); + } + break; + } + + case 0x3B: // gif stream termination code + return (stbi_uc *)s; // using '1' causes warning on some compilers + + default: + return stbi__errpuc("unknown code", "Corrupt GIF"); + } + } +} + +static void * stbi__load_gif_main_outofmem(stbi__gif * g, stbi_uc * out, int ** delays) { + STBI_FREE(g->out); + STBI_FREE(g->history); + STBI_FREE(g->background); + + if (out) + STBI_FREE(out); + if (delays && *delays) + STBI_FREE(*delays); + return stbi__errpuc("outofmem", "Out of memory"); +} + +static void * stbi__load_gif_main(stbi__context * s, int ** delays, int * x, int * y, int * z, int * comp, int req_comp) { + if (stbi__gif_test(s)) { + int layers = 0; + stbi_uc * u = 0; + stbi_uc * out = 0; + stbi_uc * two_back = 0; + stbi__gif g; + int stride; + int out_size = 0; + int delays_size = 0; + + STBI_NOTUSED(out_size); + STBI_NOTUSED(delays_size); + + memset(&g, 0, sizeof(g)); + if (delays) { + *delays = 0; + } + + do { + u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); + if (u == (stbi_uc *)s) + u = 0; // end of animated gif marker + + if (u) { + *x = g.w; + *y = g.h; + ++layers; + stride = g.w * g.h * 4; + + if (out) { + void * tmp = (stbi_uc *)STBI_REALLOC_SIZED(out, out_size, layers * stride); + if (!tmp) + return stbi__load_gif_main_outofmem(&g, out, delays); + else { + out = (stbi_uc *)tmp; + out_size = layers * stride; + } + + if (delays) { + int * new_delays = (int *)STBI_REALLOC_SIZED(*delays, delays_size, sizeof(int) * layers); + if (!new_delays) + return stbi__load_gif_main_outofmem(&g, out, delays); + *delays = new_delays; + delays_size = layers * sizeof(int); + } + } else { + out = (stbi_uc *)stbi__malloc(layers * stride); + if (!out) + return stbi__load_gif_main_outofmem(&g, out, delays); + out_size = layers * stride; + if (delays) { + *delays = (int *)stbi__malloc(layers * sizeof(int)); + if (!*delays) + return stbi__load_gif_main_outofmem(&g, out, delays); + delays_size = layers * sizeof(int); + } + } + memcpy(out + ((layers - 1) * stride), u, stride); + if (layers >= 2) { + two_back = out - 2 * stride; + } + + if (delays) { + (*delays)[layers - 1U] = g.delay; + } + } + } while (u != 0); + + // free temp buffer; + STBI_FREE(g.out); + STBI_FREE(g.history); + STBI_FREE(g.background); + + // do the final conversion after loading everything; + if (req_comp && req_comp != 4) + out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); + + *z = layers; + return out; + } else { + return stbi__errpuc("not GIF", "Image was not as a gif type."); + } +} + +static void * stbi__gif_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * u = 0; + stbi__gif g; + memset(&g, 0, sizeof(g)); + STBI_NOTUSED(ri); + + u = stbi__gif_load_next(s, &g, comp, req_comp, 0); + if (u == (stbi_uc *)s) + u = 0; // end of animated gif marker + if (u) { + *x = g.w; + *y = g.h; + + // moved conversion to after successful load so that the same + // can be done for multiple frames. + if (req_comp && req_comp != 4) + u = stbi__convert_format(u, 4, req_comp, g.w, g.h); + } else if (g.out) { + // if there was an error and we allocated an image buffer, free it! + STBI_FREE(g.out); + } + + // free buffers needed for multiple frame loading; + STBI_FREE(g.history); + STBI_FREE(g.background); + + return u; +} + +static int stbi__gif_info(stbi__context * s, int * x, int * y, int * comp) { return stbi__gif_info_raw(s, x, y, comp); } +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int stbi__hdr_test_core(stbi__context * s, const char * signature) { + int i; + for (i = 0; signature[i]; ++i) + if (stbi__get8(s) != signature[i]) + return 0; + stbi__rewind(s); + return 1; +} + +static int stbi__hdr_test(stbi__context * s) { + int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); + stbi__rewind(s); + if (!r) { + r = stbi__hdr_test_core(s, "#?RGBE\n"); + stbi__rewind(s); + } + return r; +} + +#define STBI__HDR_BUFLEN 1024 +static char * stbi__hdr_gettoken(stbi__context * z, char * buffer) { + int len = 0; + char c = '\0'; + + c = (char)stbi__get8(z); + + while (!stbi__at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == STBI__HDR_BUFLEN - 1) { + // flush to end of line + while (!stbi__at_eof(z) && stbi__get8(z) != '\n') + ; + break; + } + c = (char)stbi__get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void stbi__hdr_convert(float * output, stbi_uc * input, int req_comp) { + if (input[3] != 0) { + float f1; + // Exponent + f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) + output[1] = 1; + if (req_comp == 4) + output[3] = 1; + } else { + switch (req_comp) { + case 4: + output[3] = 1; /* fallthrough */ + case 3: + output[0] = output[1] = output[2] = 0; + break; + case 2: + output[1] = 1; /* fallthrough */ + case 1: + output[0] = 0; + break; + } + } +} + +static float * stbi__hdr_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + char buffer[STBI__HDR_BUFLEN]; + char * token; + int valid = 0; + int width, height; + stbi_uc * scanline; + float * hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1, c2, z; + const char * headerToken; + STBI_NOTUSED(ri); + + // Check identifier + headerToken = stbi__hdr_gettoken(s, buffer); + if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) + return stbi__errpf("not HDR", "Corrupt HDR image"); + + // Parse header + for (;;) { + token = stbi__hdr_gettoken(s, buffer); + if (token[0] == 0) + break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) + valid = 1; + } + + if (!valid) + return stbi__errpf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = stbi__hdr_gettoken(s, buffer); + if (strncmp(token, "-Y ", 3)) + return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = (int)strtol(token, &token, 10); + while (*token == ' ') + ++token; + if (strncmp(token, "+X ", 3)) + return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = (int)strtol(token, NULL, 10); + + if (height > STBI_MAX_DIMENSIONS) + return stbi__errpf("too large", "Very large image (corrupt?)"); + if (width > STBI_MAX_DIMENSIONS) + return stbi__errpf("too large", "Very large image (corrupt?)"); + + *x = width; + *y = height; + + if (comp) + *comp = 3; + if (req_comp == 0) + req_comp = 3; + + if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) + return stbi__errpf("too large", "HDR image is too large"); + + // Read data + hdr_data = (float *)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); + if (!hdr_data) + return stbi__errpf("outofmem", "Out of memory"); + + // Load image data + // image data is stored as some number of sca + if (width < 8 || width >= 32768) { + // Read flat data + for (j = 0; j < height; ++j) { + for (i = 0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + stbi__getn(s, rgbe, 4); + stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = stbi__get8(s); + c2 = stbi__get8(s); + len = stbi__get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi_uc rgbe[4]; + rgbe[0] = (stbi_uc)c1; + rgbe[1] = (stbi_uc)c2; + rgbe[2] = (stbi_uc)len; + rgbe[3] = (stbi_uc)stbi__get8(s); + stbi__hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + STBI_FREE(scanline); + goto main_decode_loop; // yes, this makes no sense + } + len <<= 8; + len |= stbi__get8(s); + if (len != width) { + STBI_FREE(hdr_data); + STBI_FREE(scanline); + return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); + } + if (scanline == NULL) { + scanline = (stbi_uc *)stbi__malloc_mad2(width, 4, 0); + if (!scanline) { + STBI_FREE(hdr_data); + return stbi__errpf("outofmem", "Out of memory"); + } + } + + for (k = 0; k < 4; ++k) { + int nleft; + i = 0; + while ((nleft = width - i) > 0) { + count = stbi__get8(s); + if (count > 128) { + // Run + value = stbi__get8(s); + count -= 128; + if ((count == 0) || (count > nleft)) { + STBI_FREE(hdr_data); + STBI_FREE(scanline); + return stbi__errpf("corrupt", "bad RLE data in HDR"); + } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + if ((count == 0) || (count > nleft)) { + STBI_FREE(hdr_data); + STBI_FREE(scanline); + return stbi__errpf("corrupt", "bad RLE data in HDR"); + } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = stbi__get8(s); + } + } + } + for (i = 0; i < width; ++i) + stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp); + } + if (scanline) + STBI_FREE(scanline); + } + + return hdr_data; +} + +static int stbi__hdr_info(stbi__context * s, int * x, int * y, int * comp) { + char buffer[STBI__HDR_BUFLEN]; + char * token; + int valid = 0; + int dummy; + + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + + if (stbi__hdr_test(s) == 0) { + stbi__rewind(s); + return 0; + } + + for (;;) { + token = stbi__hdr_gettoken(s, buffer); + if (token[0] == 0) + break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) + valid = 1; + } + + if (!valid) { + stbi__rewind(s); + return 0; + } + token = stbi__hdr_gettoken(s, buffer); + if (strncmp(token, "-Y ", 3)) { + stbi__rewind(s); + return 0; + } + token += 3; + *y = (int)strtol(token, &token, 10); + while (*token == ' ') + ++token; + if (strncmp(token, "+X ", 3)) { + stbi__rewind(s); + return 0; + } + token += 3; + *x = (int)strtol(token, NULL, 10); + *comp = 3; + return 1; +} +#endif // STBI_NO_HDR + +#ifndef STBI_NO_BMP +static int stbi__bmp_info(stbi__context * s, int * x, int * y, int * comp) { + void * p; + stbi__bmp_data info; + + info.all_a = 255; + p = stbi__bmp_parse_header(s, &info); + if (p == NULL) { + stbi__rewind(s); + return 0; + } + if (x) + *x = s->img_x; + if (y) + *y = s->img_y; + if (comp) { + if (info.bpp == 24 && info.ma == 0xff000000) + *comp = 3; + else + *comp = info.ma ? 4 : 3; + } + return 1; +} +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_info(stbi__context * s, int * x, int * y, int * comp) { + int channelCount, dummy, depth; + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind(s); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind(s); + return 0; + } + *y = stbi__get32be(s); + *x = stbi__get32be(s); + depth = stbi__get16be(s); + if (depth != 8 && depth != 16) { + stbi__rewind(s); + return 0; + } + if (stbi__get16be(s) != 3) { + stbi__rewind(s); + return 0; + } + *comp = 4; + return 1; +} + +static int stbi__psd_is16(stbi__context * s) { + int channelCount, depth; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind(s); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind(s); + return 0; + } + STBI_NOTUSED(stbi__get32be(s)); + STBI_NOTUSED(stbi__get32be(s)); + depth = stbi__get16be(s); + if (depth != 16) { + stbi__rewind(s); + return 0; + } + return 1; +} +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_info(stbi__context * s, int * x, int * y, int * comp) { + int act_comp = 0, num_packets = 0, chained, dummy; + stbi__pic_packet packets[10]; + + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + + if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 88); + + *x = stbi__get16be(s); + *y = stbi__get16be(s); + if (stbi__at_eof(s)) { + stbi__rewind(s); + return 0; + } + if ((*x) != 0 && (1 << 28) / (*x) < (*y)) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 8); + + do { + stbi__pic_packet * packet; + + if (num_packets == sizeof(packets) / sizeof(packets[0])) + return 0; + + packet = &packets[num_packets++]; + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + act_comp |= packet->channel; + + if (stbi__at_eof(s)) { + stbi__rewind(s); + return 0; + } + if (packet->size != 8) { + stbi__rewind(s); + return 0; + } + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); + + return 1; +} +#endif + +// ************************************************************************************************* +// Portable Gray Map and Portable Pixel Map loader +// by Ken Miller +// +// PGM: http://netpbm.sourceforge.net/doc/pgm.html +// PPM: http://netpbm.sourceforge.net/doc/ppm.html +// +// Known limitations: +// Does not support comments in the header section +// Does not support ASCII image data (formats P2 and P3) + +#ifndef STBI_NO_PNM + +static int stbi__pnm_test(stbi__context * s) { + char p, t; + p = (char)stbi__get8(s); + t = (char)stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind(s); + return 0; + } + return 1; +} + +static void * stbi__pnm_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * out; + STBI_NOTUSED(ri); + + ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n); + if (ri->bits_per_channel == 0) + return 0; + + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + *x = s->img_x; + *y = s->img_y; + if (comp) + *comp = s->img_n; + + if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0)) + return stbi__errpuc("too large", "PNM too large"); + + out = (stbi_uc *)stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0); + if (!out) + return stbi__errpuc("outofmem", "Out of memory"); + if (!stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8))) { + STBI_FREE(out); + return stbi__errpuc("bad PNM", "PNM file truncated"); + } + + if (req_comp && req_comp != s->img_n) { + if (ri->bits_per_channel == 16) { + out = (stbi_uc *)stbi__convert_format16((stbi__uint16 *)out, s->img_n, req_comp, s->img_x, s->img_y); + } else { + out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); + } + if (out == NULL) + return out; // stbi__convert_format frees input on failure + } + return out; +} + +static int stbi__pnm_isspace(char c) { return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; } + +static void stbi__pnm_skip_whitespace(stbi__context * s, char * c) { + for (;;) { + while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) + *c = (char)stbi__get8(s); + + if (stbi__at_eof(s) || *c != '#') + break; + + while (!stbi__at_eof(s) && *c != '\n' && *c != '\r') + *c = (char)stbi__get8(s); + } +} + +static int stbi__pnm_isdigit(char c) { return c >= '0' && c <= '9'; } + +static int stbi__pnm_getinteger(stbi__context * s, char * c) { + int value = 0; + + while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { + value = value * 10 + (*c - '0'); + *c = (char)stbi__get8(s); + if ((value > 214748364) || (value == 214748364 && *c > '7')) + return stbi__err("integer parse overflow", "Parsing an integer in the PPM header overflowed a 32-bit int"); + } + + return value; +} + +static int stbi__pnm_info(stbi__context * s, int * x, int * y, int * comp) { + int maxv, dummy; + char c, p, t; + + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + + stbi__rewind(s); + + // Get identifier + p = (char)stbi__get8(s); + t = (char)stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind(s); + return 0; + } + + *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm + + c = (char)stbi__get8(s); + stbi__pnm_skip_whitespace(s, &c); + + *x = stbi__pnm_getinteger(s, &c); // read width + if (*x == 0) + return stbi__err("invalid width", "PPM image header had zero or overflowing width"); + stbi__pnm_skip_whitespace(s, &c); + + *y = stbi__pnm_getinteger(s, &c); // read height + if (*y == 0) + return stbi__err("invalid width", "PPM image header had zero or overflowing width"); + stbi__pnm_skip_whitespace(s, &c); + + maxv = stbi__pnm_getinteger(s, &c); // read max value + if (maxv > 65535) + return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images"); + else if (maxv > 255) + return 16; + else + return 8; +} + +static int stbi__pnm_is16(stbi__context * s) { + if (stbi__pnm_info(s, NULL, NULL, NULL) == 16) + return 1; + return 0; +} +#endif + +static int stbi__info_main(stbi__context * s, int * x, int * y, int * comp) { +#ifndef STBI_NO_JPEG + if (stbi__jpeg_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PNG + if (stbi__png_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_GIF + if (stbi__gif_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_BMP + if (stbi__bmp_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PIC + if (stbi__pic_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PNM + if (stbi__pnm_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_HDR + if (stbi__hdr_info(s, x, y, comp)) + return 1; +#endif + +// test tga last because it's a crappy test! +#ifndef STBI_NO_TGA + if (stbi__tga_info(s, x, y, comp)) + return 1; +#endif + return stbi__err("unknown image type", "Image not of any known type, or corrupt"); +} + +static int stbi__is_16_main(stbi__context * s) { +#ifndef STBI_NO_PNG + if (stbi__png_is16(s)) + return 1; +#endif + +#ifndef STBI_NO_PSD + if (stbi__psd_is16(s)) + return 1; +#endif + +#ifndef STBI_NO_PNM + if (stbi__pnm_is16(s)) + return 1; +#endif + return 0; +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const * filename, int * x, int * y, int * comp) { + FILE * f = stbi__fopen(filename, "rb"); + int result; + if (!f) + return stbi__err("can't fopen", "Unable to open file"); + result = stbi_info_from_file(f, x, y, comp); + fclose(f); + return result; +} + +STBIDEF int stbi_info_from_file(FILE * f, int * x, int * y, int * comp) { + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__info_main(&s, x, y, comp); + fseek(f, pos, SEEK_SET); + return r; +} + +STBIDEF int stbi_is_16_bit(char const * filename) { + FILE * f = stbi__fopen(filename, "rb"); + int result; + if (!f) + return stbi__err("can't fopen", "Unable to open file"); + result = stbi_is_16_bit_from_file(f); + fclose(f); + return result; +} + +STBIDEF int stbi_is_16_bit_from_file(FILE * f) { + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__is_16_main(&s); + fseek(f, pos, SEEK_SET); + return r; +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_info_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__info_main(&s, x, y, comp); +} + +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const * c, void * user, int * x, int * y, int * comp) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)c, user); + return stbi__info_main(&s, x, y, comp); +} + +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const * buffer, int len) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__is_16_main(&s); +} + +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const * c, void * user) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)c, user); + return stbi__is_16_main(&s); +} + +#endif // STB_IMAGE_IMPLEMENTATION + +/* + revision history: + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug + 1-bit BMP + *_is_16_bit api + avoid warnings + 2.16 (2017-07-23) all functions have 16-bit variants; + STBI_NO_STDIO works again; + compilation fixes; + fix rounding in unpremultiply; + optimize vertical flip; + disable raw_len validation; + documentation fixes + 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; + warning fixes; disable run-time SSE detection on gcc; + uniform handling of optional "return" values; + thread-safe initialization of zlib tables + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) allocate large structures on the stack + remove white matting for transparent PSD + fix reported channel count for PNG & BMP + re-enable SSE2 in non-gcc 64-bit + support RGB-formatted JPEG + read 16-bit PNGs (only as 8-bit) + 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED + 2.09 (2016-01-16) allow comments in PNM files + 16-bit-per-pixel TGA (not bit-per-component) + info() for TGA could break due to .hdr handling + info() for BMP to shares code instead of sloppy parse + can use STBI_REALLOC_SIZED if allocator doesn't support realloc + code cleanup + 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA + 2.07 (2015-09-13) fix compiler warnings + partial animated GIF support + limited 16-bpc PSD support + #ifdef unused functions + bug with < 92 byte PIC,PNM,HDR,TGA + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit + 2.03 (2015-04-12) extra corruption checking (mmozeiko) + stbi_set_flip_vertically_on_load (nguillemot) + fix NEON support; fix mingw support + 2.02 (2015-01-19) fix incorrect assert, fix warning + 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 + 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG + 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) + progressive JPEG (stb) + PGM/PPM support (Ken Miller) + STBI_MALLOC,STBI_REALLOC,STBI_FREE + GIF bugfix -- seemingly never worked + STBI_NO_*, STBI_ONLY_* + 1.48 (2014-12-14) fix incorrectly-named assert() + 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) + optimize PNG (ryg) + fix bug in interlaced PNG with user-specified channel count (stb) + 1.46 (2014-08-26) + fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG + 1.45 (2014-08-16) + fix MSVC-ARM internal compiler error by wrapping malloc + 1.44 (2014-08-07) + various warning fixes from Ronny Chevalier + 1.43 (2014-07-15) + fix MSVC-only compiler problem in code changed in 1.42 + 1.42 (2014-07-09) + don't define _CRT_SECURE_NO_WARNINGS (affects user code) + fixes to stbi__cleanup_jpeg path + added STBI_ASSERT to avoid requiring assert.h + 1.41 (2014-06-25) + fix search&replace from 1.36 that messed up comments/error messages + 1.40 (2014-06-22) + fix gcc struct-initialization warning + 1.39 (2014-06-15) + fix to TGA optimization when req_comp != number of components in TGA; + fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) + add support for BMP version 5 (more ignored fields) + 1.38 (2014-06-06) + suppress MSVC warnings on integer casts truncating values + fix accidental rename of 'skip' field of I/O + 1.37 (2014-06-04) + remove duplicate typedef + 1.36 (2014-06-03) + convert to header file single-file library + if de-iphone isn't set, load iphone images color-swapped instead of returning NULL + 1.35 (2014-05-27) + various warnings + fix broken STBI_SIMD path + fix bug where stbi_load_from_file no longer left file pointer in correct place + fix broken non-easy path for 32-bit BMP (possibly never used) + TGA optimization by Arseny Kapoulkine + 1.34 (unknown) + use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case + 1.33 (2011-07-14) + make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements + 1.32 (2011-07-13) + support for "info" function for all supported filetypes (SpartanJ) + 1.31 (2011-06-20) + a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) + added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) + removed deprecated format-specific test/load functions + removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks + anyway error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) fix inefficiency in + decoding 32-bit BMP (David Woo) 1.29 (2010-08-16) various warning fixes from Aurelien Pocheville 1.28 (2010-08-01) + fix bug in GIF palette transparency (SpartanJ) + 1.27 (2010-08-01) + cast-to-stbi_uc to fix warnings + 1.26 (2010-07-24) + fix bug in file buffering for PNG reported by SpartanJ + 1.25 (2010-07-17) + refix trans_data warning (Won Chun) + 1.24 (2010-07-12) + perf improvements reading from files on platforms with lock-heavy fgetc() + minor perf improvements for jpeg + deprecated type-specific functions so we'll get feedback if they're needed + attempt to fix trans_data warning (Won Chun) + 1.23 fixed bug in iPhone support + 1.22 (2010-07-10) + removed image *writing* support + stbi_info support from Jetro Lauha + GIF support from Jean-Marc Lienher + iPhone PNG-extensions from James Brown + warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) + 1.21 fix use of 'stbi_uc' in header (reported by jon blow) + 1.20 added support for Softimage PIC, by Tom Seddon + 1.19 bug in interlaced PNG corruption check (found by ryg) + 1.18 (2008-08-02) + fix a threading bug (local mutable static) + 1.17 support interlaced PNG + 1.16 major bugfix - stbi__convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug + header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant + 0.50 (2006-11-19) + first released version +*/ + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ diff --git a/docs/BLIS.md b/docs/BLIS.md index f3d2312b4..0bcd6eeef 100644 --- a/docs/BLIS.md +++ b/docs/BLIS.md @@ -49,7 +49,7 @@ According to the BLIS documentation, we could set the following environment variables to modify the behavior of openmp: ```bash -export GOMP_GPU_AFFINITY="0-19" +export GOMP_CPU_AFFINITY="0-19" export BLIS_NUM_THREADS=14 ``` diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt index de4cf7a69..e16c65f7c 100644 --- a/examples/CMakeLists.txt +++ b/examples/CMakeLists.txt @@ -25,9 +25,11 @@ else() add_subdirectory(convert-llama2c-to-ggml) add_subdirectory(simple) add_subdirectory(batched) + add_subdirectory(batched-bench) add_subdirectory(speculative) add_subdirectory(parallel) add_subdirectory(embd-input) + add_subdirectory(llava) add_subdirectory(llama-bench) add_subdirectory(beam-search) if (LLAMA_METAL) diff --git a/examples/batched-bench/CMakeLists.txt b/examples/batched-bench/CMakeLists.txt new file mode 100644 index 000000000..40a032c51 --- /dev/null +++ b/examples/batched-bench/CMakeLists.txt @@ -0,0 +1,5 @@ +set(TARGET batched-bench) +add_executable(${TARGET} batched-bench.cpp) +install(TARGETS ${TARGET} RUNTIME) +target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT}) +target_compile_features(${TARGET} PRIVATE cxx_std_11) diff --git a/examples/batched-bench/README.md b/examples/batched-bench/README.md new file mode 100644 index 000000000..34b343f66 --- /dev/null +++ b/examples/batched-bench/README.md @@ -0,0 +1,51 @@ +# llama.cpp/example/batched-bench + +Benchmark the batched decoding performance of `llama.cpp` + +## Usage + +There are 2 modes of operation: + +- `prompt not shared` - each batch has a separate prompt of size `PP` (i.e. `N_KV = B*(PP + TG)`) +- `prompt is shared` - there is a common prompt of size `PP` used by all batches (i.e. `N_KV = PP + B*TG`) + +```bash +./batched-bench MODEL_PATH [N_KV_MAX] [IS_PP_SHARED] [NGL] [MMQ] + +# LLaMA 7B, F16, N_KV_MAX = 16384 (8GB), prompt not shared +./batched-bench ./models/llama-7b/ggml-model-f16.gguf 16384 0 99 + +# LLaMA 7B, Q8_0, N_KV_MAX = 16384 (8GB), prompt is shared +./batched-bench ./models/llama-7b/ggml-model-q8_0.gguf 16384 1 99 + +# custom set of batches +./batched-bench ./models/llama-7b/ggml-model-q8_0.gguf 2048 0 999 0 128,256,512 128,256 1,2,4,8,16,32 +``` + +## Sample results + +- `PP` - prompt tokens per batch +- `TG` - generated tokens per batch +- `B` - number of batches +- `N_KV` - required KV cache size +- `T_PP` - prompt processing time (i.e. time to first token) +- `S_PP` - prompt processing speed (`(B*PP)/T_PP` or `PP/T_PP`) +- `T_TG` - time to generate all batches +- `S_TG` - text generation speed (`(B*TG)/T_TG`) +- `T` - total time +- `S` - total speed (i.e. all tokens / total time) + +| PP | TG | B | N_KV | T_PP s | S_PP t/s | T_TG s | S_TG t/s | T s | S t/s | +|-------|--------|------|--------|----------|----------|----------|----------|----------|----------| +| 128 | 128 | 1 | 256 | 0.108 | 1186.64 | 3.079 | 41.57 | 3.187 | 80.32 | +| 128 | 128 | 2 | 512 | 0.198 | 1295.19 | 5.029 | 50.90 | 5.227 | 97.95 | +| 128 | 128 | 4 | 1024 | 0.373 | 1373.96 | 6.878 | 74.44 | 7.251 | 141.23 | +| 128 | 128 | 8 | 2048 | 0.751 | 1363.27 | 7.344 | 139.43 | 8.095 | 252.99 | +| 128 | 128 | 16 | 4096 | 1.570 | 1304.68 | 8.455 | 242.23 | 10.024 | 408.60 | +| 128 | 128 | 32 | 8192 | 3.408 | 1201.73 | 8.801 | 465.40 | 12.209 | 670.96 | +| 128 | 256 | 1 | 384 | 0.107 | 1196.70 | 6.329 | 40.45 | 6.436 | 59.67 | +| 128 | 256 | 2 | 768 | 0.194 | 1317.45 | 10.239 | 50.00 | 10.433 | 73.61 | +| 128 | 256 | 4 | 1536 | 0.366 | 1399.03 | 13.960 | 73.35 | 14.326 | 107.22 | +| 128 | 256 | 8 | 3072 | 0.751 | 1363.92 | 15.110 | 135.54 | 15.861 | 193.69 | +| 128 | 256 | 16 | 6144 | 1.569 | 1304.93 | 18.073 | 226.64 | 19.642 | 312.80 | +| 128 | 256 | 32 | 12288 | 3.409 | 1201.35 | 19.223 | 426.15 | 22.633 | 542.93 | diff --git a/examples/batched-bench/batched-bench.cpp b/examples/batched-bench/batched-bench.cpp new file mode 100644 index 000000000..3e1e0716d --- /dev/null +++ b/examples/batched-bench/batched-bench.cpp @@ -0,0 +1,251 @@ +#include "common.h" +#include "llama.h" + +#include +#include +#include +#include +#include + +// mutates the input string +static std::vector parse_list(char * p) { + std::vector ret; + + char * q = p; + + while (*p) { + if (*p == ',') { + *p = '\0'; + ret.push_back(std::atoi(q)); + q = p + 1; + } + + ++p; + } + + ret.push_back(std::atoi(q)); + + return ret; +} + +int main(int argc, char ** argv) { + gpt_params params; + + if (argc == 1 || argv[1][0] == '-') { + printf("usage: %s MODEL_PATH [N_KV_MAX] [IS_PP_SHARED] [NGL] [MMQ] \n" , argv[0]); + printf(" , and PL are comma-separated lists of numbers without spaces\n\n"); + printf(" example: %s ggml-model-f16.gguf 2048 0 999 0 128,256,512 128,256 1,2,4,8,16,32\n\n", argv[0]); + return 1 ; + } + + int n_kv_max = 2048; + int is_pp_shared = 0; + int n_gpu_layers = 0; + int mmq = 0; + + std::vector n_pp = { 128, 256, 512, 1024, 2048, 3584, 7680, }; + std::vector n_tg = { 128, 256, }; + std::vector n_pl = { 1, 2, 4, 8, 16, 32, }; + //std::vector n_pl = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 32, }; + + if (argc >= 2) { + params.model = argv[1]; + } + + if (argc >= 3) { + n_kv_max = std::atoi(argv[2]); + } + + if (argc >= 4) { + is_pp_shared = std::atoi(argv[3]); + } + + if (argc >= 5) { + n_gpu_layers = std::atoi(argv[4]); + } + + if (argc >= 6) { + mmq = std::atoi(argv[5]); + } + + if (argc >= 7) { + n_pp = parse_list(argv[6]); + } + + if (argc >= 8) { + n_tg = parse_list(argv[7]); + } + + if (argc >= 9) { + n_pl = parse_list(argv[8]); + } + + // init LLM + + llama_backend_init(params.numa); + + // initialize the model + + llama_model_params model_params = llama_model_default_params(); + + model_params.n_gpu_layers = n_gpu_layers; + + llama_model * model = llama_load_model_from_file(params.model.c_str(), model_params); + + if (model == NULL) { + fprintf(stderr , "%s: error: unable to load model\n" , __func__); + return 1; + } + + llama_context_params ctx_params = llama_context_default_params(); + + ctx_params.seed = 1234; + ctx_params.n_ctx = n_kv_max; + ctx_params.n_batch = 512; + ctx_params.mul_mat_q = mmq; + + ctx_params.n_threads = params.n_threads; + ctx_params.n_threads_batch = params.n_threads_batch == -1 ? params.n_threads : params.n_threads_batch; + + llama_context * ctx = llama_new_context_with_model(model, ctx_params); + + if (ctx == NULL) { + fprintf(stderr , "%s: error: failed to create the llama_context\n" , __func__); + return 1; + } + + llama_batch batch = llama_batch_init(n_kv_max, 0); + + // decode in batches of ctx_params.n_batch tokens + auto decode_helper = [](llama_context * ctx, llama_batch & batch, int32_t n_batch) { + for (int32_t i = 0; i < (int32_t) batch.n_tokens; i += n_batch) { + const int32_t n_tokens = std::min(n_batch, (int32_t) (batch.n_tokens - i)); + + llama_batch batch_view = { + n_tokens, + batch.token + i, + nullptr, + batch.pos + i, + batch.seq_id + i, + batch.logits + i, + 0, 0, 0, // unused + }; + + const int ret = llama_decode(ctx, batch_view); + if (ret != 0) { + LOG_TEE("failed to decode the batch, n_batch = %d, ret = %d\n", n_batch, ret); + return false; + } + } + + return true; + }; + + // warm up + { + batch.n_tokens = 16; + + for (int i = 0; i < batch.n_tokens; ++i) { + batch.token[i] = 0; + batch.pos[i] = i; + batch.seq_id[i] = 0; + batch.logits[i] = false; + } + + if (!decode_helper(ctx, batch, ctx_params.n_batch)) { + LOG_TEE("%s: llama_decode() failed\n", __func__); + return 1; + } + } + + LOG_TEE("|%6s | %6s | %4s | %6s | %8s | %8s | %8s | %8s | %8s | %8s |\n", "PP", "TG", "B", "N_KV", "T_PP s", "S_PP t/s", "T_TG s", "S_TG t/s", "T s", "S t/s"); + LOG_TEE("|%6s-|-%6s-|-%4s-|-%6s-|-%8s-|-%8s-|-%8s-|-%8s-|-%8s-|-%8s-|\n", "------", "------", "----", "------", "--------", "--------", "--------", "--------", "--------", "--------"); + + for ( int i_pp = 0; i_pp < (int) n_pp.size(); ++i_pp) { + for ( int i_tg = 0; i_tg < (int) n_tg.size(); ++i_tg) { + for (int i_pl = 0; i_pl < (int) n_pl.size(); ++i_pl) { + const int pp = n_pp[i_pp]; + const int tg = n_tg[i_tg]; + const int pl = n_pl[i_pl]; + + const int n_ctx_req = is_pp_shared ? pp + pl*tg : pl*(pp + tg); + + if (n_ctx_req > n_kv_max) { + continue; + } + + batch.n_tokens = is_pp_shared ? pp : pl*pp; + + for (int i = 0; i < batch.n_tokens; ++i) { + batch.token[i] = 0; + batch.pos[i] = i; + batch.seq_id[i] = 0; + batch.logits[i] = false; + } + batch.logits[batch.n_tokens - 1] = true; + + const auto t_pp_start = ggml_time_us(); + + llama_kv_cache_tokens_rm(ctx, -1, -1); + + if (!decode_helper(ctx, batch, ctx_params.n_batch)) { + LOG_TEE("%s: llama_decode() failed\n", __func__); + return 1; + } + + if (is_pp_shared) { + for (int32_t i = 1; i < pl; ++i) { + llama_kv_cache_seq_cp(ctx, 0, i, 0, pp); + } + } + + const auto t_pp_end = ggml_time_us(); + + const auto t_tg_start = ggml_time_us(); + + for (int i = 0; i < tg; ++i) { + batch.n_tokens = pl; + + for (int j = 0; j < pl; ++j) { + batch.token[j] = 0; + batch.pos[j] = pp + i; + batch.seq_id[j] = j; + batch.logits[j] = true; + } + + if (!decode_helper(ctx, batch, ctx_params.n_batch)) { + LOG_TEE("%s: llama_decode() failed\n", __func__); + return 1; + } + } + + const auto t_tg_end = ggml_time_us(); + + const int32_t n_kv = n_ctx_req; + + const float t_pp = (t_pp_end - t_pp_start) / 1000000.0f; + const float t_tg = (t_tg_end - t_tg_start) / 1000000.0f; + const float t = t_pp + t_tg; + + const float speed_pp = is_pp_shared ? pp / t_pp : pl*pp / t_pp; + const float speed_tg = pl*tg / t_tg; + const float speed = n_kv / t; + + LOG_TEE("|%6d | %6d | %4d | %6d | %8.3f | %8.2f | %8.3f | %8.2f | %8.3f | %8.2f |\n", pp, tg, pl, n_kv, t_pp, speed_pp, t_tg, speed_tg, t, speed); + } + } + } + + llama_print_timings(ctx); + + llama_batch_free(batch); + + llama_free(ctx); + llama_free_model(model); + + llama_backend_free(); + + fprintf(stderr, "\n\n"); + + return 0; +} diff --git a/examples/batched/batched.cpp b/examples/batched/batched.cpp index 688ef2213..a88e022d6 100644 --- a/examples/batched/batched.cpp +++ b/examples/batched/batched.cpp @@ -66,7 +66,7 @@ int main(int argc, char ** argv) { ctx_params.seed = 1234; ctx_params.n_ctx = n_kv_req; ctx_params.n_batch = std::max(n_len, n_parallel); - ctx_params.n_threads = params.n_threads; + ctx_params.n_threads = params.n_threads; ctx_params.n_threads_batch = params.n_threads_batch == -1 ? params.n_threads : params.n_threads_batch; llama_context * ctx = llama_new_context_with_model(model, ctx_params); diff --git a/examples/embd-input/embd-input-lib.cpp b/examples/embd-input/embd-input-lib.cpp index 99e6bdad5..87a5a1c26 100644 --- a/examples/embd-input/embd-input-lib.cpp +++ b/examples/embd-input/embd-input-lib.cpp @@ -128,21 +128,22 @@ bool eval_string(struct MyModel * mymodel,const char* str){ llama_token sampling_id(struct MyModel* mymodel) { llama_context* ctx = mymodel->ctx; gpt_params params = mymodel->params; + llama_sampling_params & sparams = params.sampling_params; // int n_ctx = llama_n_ctx(ctx); // out of user input, sample next token - const float temp = params.temp; - const int32_t top_k = params.top_k <= 0 ? llama_n_vocab(llama_get_model(ctx)) : params.top_k; - const float top_p = params.top_p; - const float tfs_z = params.tfs_z; - const float typical_p = params.typical_p; + const float temp = sparams.temp; + const int32_t top_k = sparams.top_k <= 0 ? llama_n_vocab(llama_get_model(ctx)) : sparams.top_k; + const float top_p = sparams.top_p; + const float tfs_z = sparams.tfs_z; + const float typical_p = sparams.typical_p; // const int32_t repeat_last_n = params.repeat_last_n < 0 ? n_ctx : params.repeat_last_n; // const float repeat_penalty = params.repeat_penalty; // const float alpha_presence = params.presence_penalty; // const float alpha_frequency = params.frequency_penalty; - const int mirostat = params.mirostat; - const float mirostat_tau = params.mirostat_tau; - const float mirostat_eta = params.mirostat_eta; + const int mirostat = sparams.mirostat; + const float mirostat_tau = sparams.mirostat_tau; + const float mirostat_eta = sparams.mirostat_eta; // const bool penalize_nl = params.penalize_nl; llama_token id = 0; @@ -151,7 +152,7 @@ llama_token sampling_id(struct MyModel* mymodel) { auto n_vocab = llama_n_vocab(llama_get_model(ctx)); // Apply params.logit_bias map - for (auto it = params.logit_bias.begin(); it != params.logit_bias.end(); it++) { + for (auto it = sparams.logit_bias.begin(); it != sparams.logit_bias.end(); it++) { logits[it->first] += it->second; } diff --git a/examples/infill/infill.cpp b/examples/infill/infill.cpp index d994de5e8..187623f5d 100644 --- a/examples/infill/infill.cpp +++ b/examples/infill/infill.cpp @@ -104,6 +104,7 @@ static void sigint_handler(int signo) { int main(int argc, char ** argv) { gpt_params params; + llama_sampling_params & sparams = params.sampling_params; g_params = ¶ms; if (!gpt_params_parse(argc, argv, params)) { @@ -206,7 +207,7 @@ int main(int argc, char ** argv) { // load the model and apply lora adapter, if any LOG("%s: load the model and apply lora adapter, if any\n", __func__); std::tie(model, ctx) = llama_init_from_gpt_params(params); - if (params.cfg_scale > 1.f) { + if (sparams.cfg_scale > 1.f) { struct llama_context_params lparams = llama_context_params_from_gpt_params(params); ctx_guidance = llama_new_context_with_model(model, lparams); } @@ -269,9 +270,9 @@ int main(int argc, char ** argv) { int guidance_offset = 0; int original_prompt_len = 0; if (ctx_guidance) { - LOG("cfg_negative_prompt: \"%s\"\n", log_tostr(params.cfg_negative_prompt)); + LOG("cfg_negative_prompt: \"%s\"\n", log_tostr(sparams.cfg_negative_prompt)); - guidance_inp = ::llama_tokenize(ctx_guidance, params.cfg_negative_prompt, add_bos); + guidance_inp = ::llama_tokenize(ctx_guidance, sparams.cfg_negative_prompt, add_bos); LOG("guidance_inp tokenized: %s\n", LOG_TOKENS_TOSTR_PRETTY(ctx_guidance, guidance_inp)); std::vector original_inp = ::llama_tokenize(ctx, params.prompt, add_bos); @@ -312,7 +313,7 @@ int main(int argc, char ** argv) { if (ctx_guidance) { LOG_TEE("\n"); - LOG_TEE("%s: negative prompt: '%s'\n", __func__, params.cfg_negative_prompt.c_str()); + LOG_TEE("%s: negative prompt: '%s'\n", __func__, sparams.cfg_negative_prompt.c_str()); LOG_TEE("%s: number of tokens in negative prompt = %zu\n", __func__, guidance_inp.size()); for (int i = 0; i < (int) guidance_inp.size(); i++) { LOG_TEE("%6d -> '%s'\n", guidance_inp[i], llama_token_to_piece(ctx, guidance_inp[i]).c_str()); @@ -358,7 +359,7 @@ int main(int argc, char ** argv) { } } LOG_TEE("sampling: repeat_last_n = %d, repeat_penalty = %f, presence_penalty = %f, frequency_penalty = %f, top_k = %d, tfs_z = %f, top_p = %f, typical_p = %f, temp = %f, mirostat = %d, mirostat_lr = %f, mirostat_ent = %f\n", - params.repeat_last_n, params.repeat_penalty, params.presence_penalty, params.frequency_penalty, params.top_k, params.tfs_z, params.top_p, params.typical_p, params.temp, params.mirostat, params.mirostat_eta, params.mirostat_tau); + sparams.repeat_last_n, sparams.repeat_penalty, sparams.presence_penalty, sparams.frequency_penalty, sparams.top_k, sparams.tfs_z, sparams.top_p, sparams.typical_p, sparams.temp, sparams.mirostat, sparams.mirostat_eta, sparams.mirostat_tau); LOG_TEE("generate: n_ctx = %d, n_batch = %d, n_predict = %d, n_keep = %d\n", n_ctx, params.n_batch, params.n_predict, params.n_keep); LOG_TEE("\n\n"); @@ -376,8 +377,8 @@ int main(int argc, char ** argv) { LOG_TEE("\n"); { - auto it = params.logit_bias.find(llama_token_eos(ctx)); - if (it != params.logit_bias.end() && it->second == -INFINITY) { + auto it = sparams.logit_bias.find(llama_token_eos(ctx)); + if (it != sparams.logit_bias.end() && it->second == -INFINITY) { LOG_TEE("%s: warning: EOS token is disabled, which will cause most grammars to fail\n", __func__); } } @@ -434,6 +435,7 @@ int main(int argc, char ** argv) { const int n_vocab = llama_n_vocab(model); + llama_sampling_context ctx_sampling = llama_sampling_context_init(params, grammar); std::vector candidates; candidates.reserve(n_vocab); @@ -552,7 +554,7 @@ int main(int argc, char ** argv) { if ((int) embd_inp.size() <= n_consumed && !is_interacting) { - const llama_token id = llama_sample_token(ctx, ctx_guidance, grammar, params, last_tokens, candidates); + const llama_token id = llama_sampling_sample(ctx, ctx_guidance, ctx_sampling, last_tokens, candidates); last_tokens.erase(last_tokens.begin()); last_tokens.push_back(id); diff --git a/examples/llava/CMakeLists.txt b/examples/llava/CMakeLists.txt new file mode 100644 index 000000000..d02e6ab46 --- /dev/null +++ b/examples/llava/CMakeLists.txt @@ -0,0 +1,20 @@ +set(TARGET clip) +add_library(${TARGET} clip.cpp clip.h) +install(TARGETS ${TARGET} LIBRARY) +target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT}) +target_compile_features(${TARGET} PRIVATE cxx_std_11) +if (NOT MSVC) + target_compile_options(${TARGET} PRIVATE -Wno-cast-qual) # stb_image.h + endif() +if(TARGET BUILD_INFO) + add_dependencies(${TARGET} BUILD_INFO) +endif() + +set(TARGET llava) +add_executable(${TARGET} llava.cpp) +install(TARGETS ${TARGET} RUNTIME) +target_link_libraries(${TARGET} PRIVATE common llama clip ${CMAKE_THREAD_LIBS_INIT}) +target_compile_features(${TARGET} PRIVATE cxx_std_11) +if(TARGET BUILD_INFO) + add_dependencies(${TARGET} BUILD_INFO) +endif() diff --git a/examples/llava/README.md b/examples/llava/README.md new file mode 100644 index 000000000..fc3446b60 --- /dev/null +++ b/examples/llava/README.md @@ -0,0 +1,57 @@ +# LLaVA + +Currently this implementation supports [llava-v1.5](https://huggingface.co/liuhaotian/llava-v1.5-7b) variants. + +The pre-converted [7b](https://huggingface.co/mys/ggml_llava-v1.5-7b) +and [13b](https://huggingface.co/mys/ggml_llava-v1.5-13b) +models are available. + +After API is confirmed, more models will be supported / uploaded. + +## Usage +Build with cmake or run `make llava` to build it. + +After building, run: `./llava` to see the usage. For example: + +```sh +./llava -m llava-v1.5-7b/ggml-model-q5_k.gguf --mmproj llava-v1.5-7b/mmproj-model-f16.gguf --image path/to/an/image.jpg +``` + +**note**: A lower temperature like 0.1 is recommended for better quality. add `--temp 0.1` to the command to do so. + +## Model conversion + +- Clone `llava-v15-7b`` and `clip-vit-large-patch14-336`` locally: + +```sh +git clone https://huggingface.co/liuhaotian/llava-v1.5-7b + +git clone https://huggingface.co/openai/clip-vit-large-patch14-336 +``` + +2. Use `llava-surgery.py` to split the LLaVA model to LLaMA and multimodel projector constituents: + +```sh +python ./examples/llava/llava-surgery.py -m ../llava-v1.5-7b +``` + +3. Use `convert-image-encoder-to-gguf.py` to convert the LLaVA image encoder to GGUF: + +```sh +python ./examples/llava/convert-image-encoder-to-gguf -m ../clip-vit-large-patch14-336 --llava-projector ../llava-v1.5-7b/llava.projector --output-dir ../llava-v1.5-7b +``` + +4. Use `convert.py` to convert the LLaMA part of LLaVA to GGUF: + +```sh +python ./convert.py ../llava-v1.5-7b +``` + +Now both the LLaMA part and the image encoder is in the `llava-v1.5-7b` directory. + +## TODO + +- [ ] Support server mode. +- [ ] Support non-CPU backend for the image encoding part. +- [ ] Support different sampling methods. +- [ ] Support more model variants. diff --git a/examples/llava/clip.cpp b/examples/llava/clip.cpp new file mode 100644 index 000000000..f4258b34d --- /dev/null +++ b/examples/llava/clip.cpp @@ -0,0 +1,1062 @@ +// NOTE: This is modified from clip.cpp only for LLaVA, +// so there might be still unnecessary artifacts hanging around +// I'll gradually clean and extend it + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "clip.h" +#include "ggml.h" +#include "ggml-alloc.h" + +#define STB_IMAGE_IMPLEMENTATION +#include "stb_image.h" + +#define CLIP_DEBUG + +static std::string format(const char * fmt, ...) { + va_list ap; + va_list ap2; + va_start(ap, fmt); + va_copy(ap2, ap); + int size = vsnprintf(NULL, 0, fmt, ap); + GGML_ASSERT(size >= 0 && size < INT_MAX); // NOLINT + std::vector buf(size + 1); + int size2 = vsnprintf(buf.data(), size + 1, fmt, ap2); + GGML_ASSERT(size2 == size); + va_end(ap2); + va_end(ap); + return std::string(buf.data(), buf.size()); +} + +// +// key constants +// + +#define KEY_FTYPE "general.file_type" +#define KEY_NAME "general.name" +#define KEY_DESCRIPTION "general.description" +#define KEY_HAS_TEXT_ENC "clip.has_text_encoder" +#define KEY_HAS_VIS_ENC "clip.has_vision_encoder" +#define KEY_HAS_LLAVA_PROJ "clip.has_llava_projector" +#define KEY_USE_GELU "clip.use_gelu" +#define KEY_N_EMBD "clip.%s.embedding_length" +#define KEY_N_FF "clip.%s.feed_forward_length" +#define KEY_N_BLOCK "clip.%s.block_count" +#define KEY_N_HEAD "clip.%s.attention.head_count" +#define KEY_LAYER_NORM_EPS "clip.%s.attention.layer_norm_epsilon" +#define KEY_PROJ_DIM "clip.%s.projection_dim" +#define KEY_TOKENS "tokenizer.ggml.tokens" +#define KEY_N_POSITIONS "clip.text.context_length" +#define KEY_IMAGE_SIZE "clip.vision.image_size" +#define KEY_PATCH_SIZE "clip.vision.patch_size" +#define KEY_IMAGE_MEAN "clip.vision.image_mean" +#define KEY_IMAGE_STD "clip.vision.image_std" + +// +// tensor name constants +// + +#define TN_TOKEN_EMBD "%s.token_embd.weight" +#define TN_POS_EMBD "%s.position_embd.weight" +#define TN_CLASS_EMBD "v.class_embd" +#define TN_PATCH_EMBD "v.patch_embd.weight" +#define TN_ATTN_K "%s.blk.%d.attn_k.%s" +#define TN_ATTN_Q "%s.blk.%d.attn_q.%s" +#define TN_ATTN_V "%s.blk.%d.attn_v.%s" +#define TN_ATTN_OUTPUT "%s.blk.%d.attn_out.%s" +#define TN_FFN_DOWN "%s.blk.%d.ffn_down.%s" +#define TN_FFN_UP "%s.blk.%d.ffn_up.%s" +#define TN_LN_1 "%s.blk.%d.ln1.%s" +#define TN_LN_2 "%s.blk.%d.ln2.%s" +#define TN_LN_PRE "%s.pre_ln.%s" +#define TN_LN_POST "%s.post_ln.%s" +#define TN_TEXT_PROJ "text_projection.weight" +#define TN_VIS_PROJ "visual_projection.weight" +#define TN_LLAVA_PROJ "mm.%d.%s" + +// +// utilities to get data from a gguf file +// + +static int get_key_idx(const gguf_context * ctx, const char * key) { + int i = gguf_find_key(ctx, key); + if (i == -1) { + fprintf(stderr, "key %s not found in file\n", key); + throw std::runtime_error(format("Missing required key: %s", key)); + } + + return i; +} + +static uint32_t get_u32(const gguf_context * ctx, const std::string & key) { + const int i = get_key_idx(ctx, key.c_str()); + + return gguf_get_val_u32(ctx, i); +} + +static float get_f32(const gguf_context * ctx, const std::string & key) { + const int i = get_key_idx(ctx, key.c_str()); + + return gguf_get_val_f32(ctx, i); +} + +static struct ggml_tensor * get_tensor(struct ggml_context * ctx, const std::string & name) { + struct ggml_tensor * cur = ggml_get_tensor(ctx, name.c_str()); + if (!cur) { + printf("unable to find tensor %s\n", name.c_str()); + throw std::runtime_error(format("unable to find tensor %s\n", name.c_str())); + } + + return cur; +} + +static std::string get_ftype(int ftype) { + switch (ftype) { + case 0: + return "f32"; + case 1: + return "f16"; + case 2: + return "q4_0"; + case 3: + return "q4_1"; + case 6: + return "q5_0"; + case 7: + return "q5_1"; + case 8: + return "q8_0"; + default: + throw std::runtime_error(format("Unrecognized file type: %d\n", ftype)); + } +} + +// +// clip layers +// + +struct clip_layer { + // attention + struct ggml_tensor * k_w; + struct ggml_tensor * k_b; + struct ggml_tensor * q_w; + struct ggml_tensor * q_b; + struct ggml_tensor * v_w; + struct ggml_tensor * v_b; + + struct ggml_tensor * o_w; + struct ggml_tensor * o_b; + + // layernorm 1 + struct ggml_tensor * ln_1_w; + struct ggml_tensor * ln_1_b; + + // ff + struct ggml_tensor * ff_i_w; + struct ggml_tensor * ff_i_b; + + struct ggml_tensor * ff_o_w; + struct ggml_tensor * ff_o_b; + + // layernorm 2 + struct ggml_tensor * ln_2_w; + struct ggml_tensor * ln_2_b; +}; + +struct clip_vision_model { + struct clip_vision_hparams hparams; + + // embeddings + struct ggml_tensor * class_embedding; + struct ggml_tensor * patch_embeddings; + struct ggml_tensor * position_embeddings; + + struct ggml_tensor * pre_ln_w; + struct ggml_tensor * pre_ln_b; + + std::vector layers; + + struct ggml_tensor * post_ln_w; + struct ggml_tensor * post_ln_b; + + struct ggml_tensor * projection; + + // LLaVA projection + struct ggml_tensor * mm_0_w; + struct ggml_tensor * mm_0_b; + struct ggml_tensor * mm_2_w; + struct ggml_tensor * mm_2_b; +}; + +// Replacement for std::vector that doesn't require zero-initialization. +struct clip_buffer { + uint8_t * data = NULL; + size_t size = 0; + + void resize(size_t size) { + delete[] data; + data = new uint8_t[size]; + this->size = size; + } + + ~clip_buffer() { delete[] data; } +}; + +struct clip_ctx { + bool has_text_encoder = false; + bool has_vision_encoder = false; + bool has_llava_projector = false; + struct clip_vision_model vision_model; + float image_mean[3]; + float image_std[3]; + bool use_gelu = false; + int32_t ftype = 1; + struct ggml_context * ctx; + struct gguf_context * ctx_gguf; + + // memory buffers to evaluate the model + clip_buffer buf_compute; + clip_buffer buf_alloc; + ggml_allocr * alloc = NULL; +}; + +static ggml_cgraph * clip_image_build_graph(const clip_ctx * ctx, const clip_image_f32_batch * imgs) { + if (!ctx->has_vision_encoder) { + printf("This gguf file seems to have no vision encoder\n"); + return nullptr; + } + + const auto & model = ctx->vision_model; + const auto & hparams = model.hparams; + + const int image_size = hparams.image_size; + const int patch_size = hparams.patch_size; + const int num_patches = ((image_size / patch_size) * (image_size / patch_size)); + const int num_positions = num_patches + 1; + const int hidden_size = hparams.hidden_size; + const int n_head = hparams.n_head; + const int d_head = hidden_size / n_head; + const int n_layer = hparams.n_layer; + //const int n_intermediate = hparams.n_intermediate; + //const int projection_dim = hparams.projection_dim; + const float eps = hparams.eps; + int batch_size = imgs->size; + if(ctx->has_llava_projector) { + GGML_ASSERT(batch_size == 1); + } + + const auto & buf_compute = ctx->buf_compute; + + struct ggml_init_params params = { + /*.mem_size =*/ buf_compute.size, + /*.mem_buffer =*/ buf_compute.data, + /*.no_alloc =*/ false, + }; + + params.no_alloc = true; + + struct ggml_context * ctx0 = ggml_init(params); + struct ggml_cgraph * gf = ggml_new_graph(ctx0); + + struct ggml_tensor * inp_raw = ggml_new_tensor_4d(ctx0, GGML_TYPE_F32, image_size, image_size, 3, batch_size); + ggml_allocr_alloc(ctx->alloc, inp_raw); + + if (!ggml_allocr_is_measure(ctx->alloc)) { + float * data = (float *)ggml_get_data(inp_raw); + + for (size_t i = 0; i < imgs->size; i++) { + const int nx = imgs->data[i].nx; + const int ny = imgs->data[i].ny; + GGML_ASSERT(nx == image_size && ny == image_size); + + const int n = nx * ny; + + for (int b = 0; b < batch_size; b++) { + for (int k = 0; k < 3; k++) { + for (int y = 0; y < ny; y++) { + for (int x = 0; x < nx; x++) { + data[(b * 3 * n) + k * n + y * nx + x] = imgs->data[b].data[3 * (y * nx + x) + k]; + } + } + } + } + } + } + + struct ggml_tensor * inp = ggml_conv_2d(ctx0, model.patch_embeddings, inp_raw, patch_size, patch_size, 0, 0, 1, 1); + + inp = ggml_reshape_3d(ctx0, inp, num_patches, hidden_size, batch_size); + inp = ggml_cont(ctx0, ggml_permute(ctx0, inp, 1, 0, 2, 3)); + + // concat class_embeddings and patch_embeddings + struct ggml_tensor * embeddings = ggml_new_tensor_3d(ctx0, GGML_TYPE_F32, hidden_size, num_positions, batch_size); + ggml_allocr_alloc(ctx->alloc, embeddings); + if (!ggml_allocr_is_measure(ctx->alloc)) { + ggml_set_zero(embeddings); + } + + struct ggml_tensor * temp = ggml_new_tensor_3d(ctx0, GGML_TYPE_F32, hidden_size, 1, batch_size); + ggml_allocr_alloc(ctx->alloc, temp); + + embeddings = ggml_acc(ctx0, embeddings, ggml_repeat(ctx0, model.class_embedding, temp), embeddings->nb[1], + embeddings->nb[2], embeddings->nb[3], 0); + embeddings = + ggml_acc(ctx0, embeddings, inp, embeddings->nb[1], embeddings->nb[2], embeddings->nb[3], model.class_embedding->nb[1]); + + struct ggml_tensor * positions = ggml_new_tensor_1d(ctx0, GGML_TYPE_I32, num_positions); + ggml_allocr_alloc(ctx->alloc, positions); + if (!ggml_allocr_is_measure(ctx->alloc)) { + for (int i = 0; i < num_positions; i++) { + ggml_set_i32_1d(positions, i, i); + } + } + + embeddings = + ggml_add(ctx0, embeddings, ggml_repeat(ctx0, ggml_get_rows(ctx0, model.position_embeddings, positions), embeddings)); + + // pre-layernorm + { + embeddings = ggml_norm(ctx0, embeddings, eps); + + embeddings = ggml_add(ctx0, ggml_mul(ctx0, ggml_repeat(ctx0, model.pre_ln_w, embeddings), embeddings), + ggml_repeat(ctx0, model.pre_ln_b, embeddings)); + } + + struct ggml_tensor * KQ_scale = ggml_new_tensor_1d(ctx0, GGML_TYPE_F32, 1); + ggml_allocr_alloc(ctx->alloc, KQ_scale); + if (!ggml_allocr_is_measure(ctx->alloc)) { + ggml_set_f32(KQ_scale, 1.0f / sqrt((float)d_head)); + } + + // loop over layers + for (int il = 0; il < n_layer - 1; il++) { + struct ggml_tensor * cur = embeddings; // embeddings = residual, cur = hidden_states + + //const size_t nb_q_w = model.layers[il].q_w->nb[0]; + + // layernorm1 + { + cur = ggml_norm(ctx0, cur, eps); + + cur = ggml_add(ctx0, ggml_mul(ctx0, ggml_repeat(ctx0, model.layers[il].ln_1_w, cur), cur), + ggml_repeat(ctx0, model.layers[il].ln_1_b, cur)); + } + + // self-attention + { + + struct ggml_tensor * Q = + ggml_add(ctx0, ggml_repeat(ctx0, model.layers[il].q_b, cur), ggml_mul_mat(ctx0, model.layers[il].q_w, cur)); + + Q = ggml_scale_inplace(ctx0, Q, KQ_scale); + Q = ggml_reshape_4d(ctx0, Q, d_head, n_head, num_positions, batch_size); + Q = ggml_cont(ctx0, ggml_permute(ctx0, Q, 0, 2, 1, 3)); + Q = ggml_reshape_3d(ctx0, Q, d_head, num_positions, n_head * batch_size); + + struct ggml_tensor * K = + ggml_add(ctx0, ggml_repeat(ctx0, model.layers[il].k_b, cur), ggml_mul_mat(ctx0, model.layers[il].k_w, cur)); + + K = ggml_reshape_4d(ctx0, K, d_head, n_head, num_positions, batch_size); + K = ggml_cont(ctx0, ggml_permute(ctx0, K, 0, 2, 1, 3)); + K = ggml_reshape_3d(ctx0, K, d_head, num_positions, n_head * batch_size); + + struct ggml_tensor * V = + ggml_add(ctx0, ggml_repeat(ctx0, model.layers[il].v_b, cur), ggml_mul_mat(ctx0, model.layers[il].v_w, cur)); + + V = ggml_reshape_4d(ctx0, V, d_head, n_head, num_positions, batch_size); + V = ggml_cont(ctx0, ggml_permute(ctx0, V, 1, 2, 0, 3)); + V = ggml_reshape_3d(ctx0, V, num_positions, d_head, n_head * batch_size); + + struct ggml_tensor * KQ = ggml_mul_mat(ctx0, K, Q); + KQ = ggml_soft_max_inplace(ctx0, KQ); + struct ggml_tensor * KQV = ggml_mul_mat(ctx0, V, KQ); + KQV = ggml_reshape_4d(ctx0, KQV, d_head, num_positions, n_head, batch_size); + KQV = ggml_cont(ctx0, ggml_permute(ctx0, KQV, 0, 2, 1, 3)); + + cur = ggml_cpy(ctx0, KQV, ggml_new_tensor_3d(ctx0, GGML_TYPE_F32, hidden_size, num_positions, batch_size)); + } + + // attention output + cur = ggml_add(ctx0, ggml_repeat(ctx0, model.layers[il].o_b, cur), ggml_mul_mat(ctx0, model.layers[il].o_w, cur)); + + // re-add the layer input, e.g., residual + cur = ggml_add(ctx0, cur, embeddings); + + embeddings = cur; // embeddings = residual, cur = hidden_states + + // layernorm2 + { + cur = ggml_norm(ctx0, cur, eps); + + cur = ggml_add(ctx0, ggml_mul(ctx0, ggml_repeat(ctx0, model.layers[il].ln_2_w, cur), cur), + ggml_repeat(ctx0, model.layers[il].ln_2_b, cur)); + } + + cur = ggml_mul_mat(ctx0, model.layers[il].ff_i_w, cur); + cur = ggml_add(ctx0, ggml_repeat(ctx0, model.layers[il].ff_i_b, cur), cur); + + if (ctx->use_gelu) { + cur = ggml_gelu_inplace(ctx0, cur); + } else { + cur = ggml_gelu_quick_inplace(ctx0, cur); + } + + cur = ggml_mul_mat(ctx0, model.layers[il].ff_o_w, cur); + cur = ggml_add(ctx0, ggml_repeat(ctx0, model.layers[il].ff_o_b, cur), cur); + + // residual 2 + cur = ggml_add(ctx0, embeddings, cur); + + embeddings = cur; + } + + // llava projector + { + embeddings = ggml_reshape_2d(ctx0, embeddings, embeddings->ne[0], embeddings->ne[1]); + + struct ggml_tensor * patches = ggml_new_tensor_1d(ctx0, GGML_TYPE_I32, num_patches); + ggml_allocr_alloc(ctx->alloc, patches); + if (!ggml_allocr_is_measure(ctx->alloc)) { + for (int i = 0; i < num_patches; ++i) { + ggml_set_i32_1d(patches, i, i+1); + } + } + + embeddings = ggml_get_rows(ctx0, embeddings, patches); + + // mm projection 0 + embeddings = ggml_mul_mat(ctx0, model.mm_0_w, embeddings); + embeddings = ggml_add(ctx0, ggml_repeat(ctx0, model.mm_0_b, embeddings), embeddings); + + embeddings = ggml_gelu(ctx0, embeddings); + + embeddings = ggml_mul_mat(ctx0, model.mm_2_w, embeddings); + embeddings = ggml_add(ctx0, ggml_repeat(ctx0, model.mm_2_b, embeddings), embeddings); + } + + // build the graph + ggml_build_forward_expand(gf, embeddings); + + ggml_free(ctx0); + + return gf; +} + +// read and create ggml_context containing the tensors and their data +struct clip_ctx * clip_model_load(const char * fname, const int verbosity = 1) { + + struct ggml_context * meta = NULL; + + struct gguf_init_params params = { + /*.no_alloc = */ true, + /*.ctx = */ &meta, + }; + + struct gguf_context * ctx = gguf_init_from_file(fname, params); + + if (verbosity >= 1) { + const int n_tensors = gguf_get_n_tensors(ctx); + const int n_kv = gguf_get_n_kv(ctx); + const int ftype = get_u32(ctx, KEY_FTYPE); + const std::string ftype_str = get_ftype(ftype); + const int idx_desc = get_key_idx(ctx, KEY_DESCRIPTION); + const std::string description = gguf_get_val_str(ctx, idx_desc); + const int idx_name = gguf_find_key(ctx, KEY_NAME); + if (idx_name != -1) { // make name optional temporarily as some of the uploaded models missing it due to a bug + const std::string name = gguf_get_val_str(ctx, idx_name); + printf("%s: model name: %s\n", __func__, name.c_str()); + } + printf("%s: description: %s\n", __func__, description.c_str()); + printf("%s: GGUF version: %d\n", __func__, gguf_get_version(ctx)); + printf("%s: alignment: %zu\n", __func__, gguf_get_alignment(ctx)); + printf("%s: n_tensors: %d\n", __func__, n_tensors); + printf("%s: n_kv: %d\n", __func__, n_kv); + printf("%s: ftype: %s\n", __func__, ftype_str.c_str()); + printf("\n"); + } + + // kv + if (verbosity >= 3) { + const int n_kv = gguf_get_n_kv(ctx); + + for (int i = 0; i < n_kv; ++i) { + const char * key = gguf_get_key(ctx, i); + + printf("%s: kv[%d]: key = %s\n", __func__, i, key); + } + printf("\n"); + } + + // data + size_t ctx_size = 0; + { + const int n_tensors = gguf_get_n_tensors(ctx); + + for (int i = 0; i < n_tensors; ++i) { + const char * name = gguf_get_tensor_name(ctx, i); + const size_t offset = gguf_get_tensor_offset(ctx, i); + + struct ggml_tensor * cur = ggml_get_tensor(meta, name); + ctx_size += sizeof(struct ggml_tensor) + GGML_OBJECT_SIZE; + size_t tensor_size = ggml_nbytes(cur); + size_t padded_size = ggml_nbytes_pad(cur); + ctx_size += padded_size; + if (verbosity >= 3) { + printf("%s: tensor[%d]: n_dims = %d, name = %s, tensor_size=%zu, padded_size=%zu, offset=%zu\n", __func__, i, + cur->n_dims, cur->name, tensor_size, padded_size, offset); + } + } + } + + clip_ctx * new_clip = new clip_ctx; + + // model size and capabilities + { + int idx = get_key_idx(ctx, KEY_HAS_TEXT_ENC); + new_clip->has_text_encoder = gguf_get_val_bool(ctx, idx); + + idx = get_key_idx(ctx, KEY_HAS_VIS_ENC); + new_clip->has_vision_encoder = gguf_get_val_bool(ctx, idx); + + idx = gguf_find_key(ctx, KEY_HAS_LLAVA_PROJ); + if (idx != -1) { + new_clip->has_llava_projector = gguf_get_val_bool(ctx, idx); + } + + GGML_ASSERT(new_clip->has_llava_projector); // see monatis/clip.cpp for image and/or text encoding for semantic search + GGML_ASSERT(new_clip->has_vision_encoder); + GGML_ASSERT(!new_clip->has_text_encoder); + + idx = get_key_idx(ctx, KEY_USE_GELU); + new_clip->use_gelu = gguf_get_val_bool(ctx, idx); + + if (verbosity >= 1) { + printf("%s: text_encoder: %d\n", __func__, new_clip->has_text_encoder); + printf("%s: vision_encoder: %d\n", __func__, new_clip->has_vision_encoder); + printf("%s: llava_projector: %d\n", __func__, new_clip->has_llava_projector); + printf("%s: model size: %.2f MB\n", __func__, (ctx_size / 1024.0 / 1024.0)); + printf("%s: metadata size: %.2f MB\n", __func__, ggml_get_mem_size(meta) / 1024.0 / 1024.0); + } + } + + // load tensors + { + struct ggml_init_params params = { + /*.mem_size =*/ ctx_size, + /*.mem_buffer =*/ NULL, + /*.no_alloc =*/ false, + }; + + new_clip->ctx = ggml_init(params); + if (!new_clip->ctx) { + fprintf(stderr, "%s: ggml_init() failed\n", __func__); + clip_free(new_clip); + return nullptr; + } + + auto fin = std::ifstream(fname, std::ios::binary); + if (!fin) { + printf("cannot open model file for loading tensors\n"); + clip_free(new_clip); + return nullptr; + } + + const int n_tensors = gguf_get_n_tensors(ctx); + for (int i = 0; i < n_tensors; ++i) { + const char * name = gguf_get_tensor_name(ctx, i); + struct ggml_tensor * t = ggml_get_tensor(meta, name); + struct ggml_tensor * cur = ggml_dup_tensor(new_clip->ctx, t); + ggml_set_name(cur, name); + + const size_t offset = gguf_get_data_offset(ctx) + gguf_get_tensor_offset(ctx, i); + fin.seekg(offset, std::ios::beg); + if (!fin) { + printf("%s: failed to seek for tensor %s\n", __func__, name); + clip_free(new_clip); + return nullptr; + } + + fin.read(reinterpret_cast(cur->data), ggml_nbytes(t)); + } + + fin.close(); + } + + // vision model + if (new_clip->has_vision_encoder) { + // load vision model + auto & vision_model = new_clip->vision_model; + auto & hparams = vision_model.hparams; + hparams.hidden_size = get_u32(ctx, format(KEY_N_EMBD, "vision")); + hparams.n_head = get_u32(ctx, format(KEY_N_HEAD, "vision")); + hparams.n_intermediate = get_u32(ctx, format(KEY_N_FF, "vision")); + hparams.n_layer = get_u32(ctx, format(KEY_N_BLOCK, "vision")); + hparams.image_size = get_u32(ctx, KEY_IMAGE_SIZE); + hparams.patch_size = get_u32(ctx, KEY_PATCH_SIZE); + hparams.projection_dim = get_u32(ctx, format(KEY_PROJ_DIM, "vision")); + hparams.eps = get_f32(ctx, format(KEY_LAYER_NORM_EPS, "vision")); + + int idx_mean = get_key_idx(ctx, KEY_IMAGE_MEAN); + int idx_std = get_key_idx(ctx, KEY_IMAGE_STD); + for (int i = 0; i < 3; ++i) { + new_clip->image_mean[i] = *((float *)gguf_get_arr_data(ctx, idx_mean)); + new_clip->image_std[i] = *((float *)gguf_get_arr_data(ctx, idx_std)); + } + + if (verbosity >= 2) { + printf("\n%s: vision model hparams\n", __func__); + printf("image_size %d\n", hparams.image_size); + printf("patch_size %d\n", hparams.patch_size); + printf("v_hidden_size %d\n", hparams.hidden_size); + printf("v_n_intermediate %d\n", hparams.n_intermediate); + printf("v_projection_dim %d\n", hparams.projection_dim); + printf("v_n_head %d\n", hparams.n_head); + printf("v_n_layer %d\n", hparams.n_layer); + } + + vision_model.patch_embeddings = get_tensor(new_clip->ctx, TN_PATCH_EMBD); + vision_model.class_embedding = get_tensor(new_clip->ctx, TN_CLASS_EMBD); + vision_model.position_embeddings = get_tensor(new_clip->ctx, format(TN_POS_EMBD, "v")); + vision_model.pre_ln_w = get_tensor(new_clip->ctx, format(TN_LN_PRE, "v", "weight")); + vision_model.pre_ln_b = get_tensor(new_clip->ctx, format(TN_LN_PRE, "v", "bias")); + vision_model.mm_0_w = get_tensor(new_clip->ctx, format(TN_LLAVA_PROJ, 0, "weight")); + vision_model.mm_0_b = get_tensor(new_clip->ctx, format(TN_LLAVA_PROJ, 0, "bias")); + vision_model.mm_2_w = get_tensor(new_clip->ctx, format(TN_LLAVA_PROJ, 2, "weight")); + vision_model.mm_2_b = get_tensor(new_clip->ctx, format(TN_LLAVA_PROJ, 2, "bias")); + + vision_model.layers.resize(hparams.n_layer); + for (int il = 0; il < hparams.n_layer; ++il) { + auto & layer = vision_model.layers[il]; + layer.k_w = get_tensor(new_clip->ctx, format(TN_ATTN_K, "v", il, "weight")); + layer.q_w = get_tensor(new_clip->ctx, format(TN_ATTN_Q, "v", il, "weight")); + layer.v_w = get_tensor(new_clip->ctx, format(TN_ATTN_V, "v", il, "weight")); + layer.o_w = get_tensor(new_clip->ctx, format(TN_ATTN_OUTPUT, "v", il, "weight")); + layer.ln_1_w = get_tensor(new_clip->ctx, format(TN_LN_1, "v", il, "weight")); + layer.ln_2_w = get_tensor(new_clip->ctx, format(TN_LN_2, "v", il, "weight")); + layer.ff_i_w = get_tensor(new_clip->ctx, format(TN_FFN_DOWN, "v", il, "weight")); + layer.ff_o_w = get_tensor(new_clip->ctx, format(TN_FFN_UP, "v", il, "weight")); + layer.k_b = get_tensor(new_clip->ctx, format(TN_ATTN_K, "v", il, "bias")); + layer.q_b = get_tensor(new_clip->ctx, format(TN_ATTN_Q, "v", il, "bias")); + layer.v_b = get_tensor(new_clip->ctx, format(TN_ATTN_V, "v", il, "bias")); + layer.o_b = get_tensor(new_clip->ctx, format(TN_ATTN_OUTPUT, "v", il, "bias")); + layer.ln_1_b = get_tensor(new_clip->ctx, format(TN_LN_1, "v", il, "bias")); + layer.ln_2_b = get_tensor(new_clip->ctx, format(TN_LN_2, "v", il, "bias")); + layer.ff_i_b = get_tensor(new_clip->ctx, format(TN_FFN_DOWN, "v", il, "bias")); + layer.ff_o_b = get_tensor(new_clip->ctx, format(TN_FFN_UP, "v", il, "bias")); + } + } + + ggml_free(meta); + + new_clip->ctx_gguf = ctx; + +// measure mem requirement and allocate + { + static const size_t tensor_alignment = 32; + new_clip->buf_compute.resize(ggml_tensor_overhead()*GGML_MAX_NODES + ggml_graph_overhead()); + new_clip->alloc = ggml_allocr_new_measure(tensor_alignment); + clip_image_f32_batch batch; + batch.size = 1; + ggml_cgraph * gf = clip_image_build_graph(new_clip, &batch); + size_t alloc_size = ggml_allocr_alloc_graph(new_clip->alloc, gf) + tensor_alignment; + ggml_allocr_free(new_clip->alloc); + new_clip->buf_alloc.resize(alloc_size); + new_clip->alloc = ggml_allocr_new(new_clip->buf_alloc.data, new_clip->buf_alloc.size, tensor_alignment); + + printf("%s: total allocated memory: %.2f MB\n", __func__, (new_clip->buf_compute.size + alloc_size)/1024.0/1024.0); + } + + return new_clip; +} + +clip_image_u8 * make_clip_image_u8() { return new clip_image_u8(); } + +clip_image_f32 * make_clip_image_f32() { return new clip_image_f32(); } + +bool clip_image_load_from_file(const char * fname, clip_image_u8 * img) { + int nx, ny, nc; + auto data = stbi_load(fname, &nx, &ny, &nc, 3); + if (!data) { + fprintf(stderr, "%s: failed to load '%s'\n", __func__, fname); + return false; + } + + img->nx = nx; + img->ny = ny; + img->size = nx * ny * 3; + img->data = new uint8_t[img->size](); + memcpy(img->data, data, img->size); + + stbi_image_free(data); + + return true; +} + +// normalize: x = (x - mean) / std +// TODO: implement bicubic interpolation instead of linear. +bool clip_image_preprocess(const clip_ctx * ctx, const clip_image_u8 * img, clip_image_f32 * res, const bool pad2square) { + if (!ctx->has_vision_encoder) { + printf("This gguf file seems to have no vision encoder\n"); + return false; + } + + // the logic below is to pad the shorter side to the longer side with a background color: rgb(122, 116, 104) + // see https://github.com/haotian-liu/LLaVA/blob/e854a2bf85118c504f6f16bf5c3c7c92f8fa8c6b/llava/conversation.py#L113-L156 + + clip_image_u8 temp; // we will keep the input image data here temporarily + if (pad2square && img->nx != img->ny) { + int longer_side = std::max(img->nx, img->ny); + temp.nx = longer_side; + temp.ny = longer_side; + temp.size = 3 * longer_side * longer_side; + temp.data = new uint8_t[temp.size](); + uint8_t bc[3] = {122, 116, 104}; // bakground color in RGB from LLaVA + + // fill with background color + for (size_t i = 0; i < temp.size; i++) { + temp.data[i] = bc[i % 3]; + } + + // copy from the input image + for (int y = 0; y < img->ny; y++) { + for (int x = 0; x < img->nx; x++) { + const int i = 3 * (y * img->nx + x); + const int j = 3 * (y * temp.nx + x); + temp.data[j] = img->data[i]; + temp.data[j+1] = img->data[i+1]; + temp.data[j+2] = img->data[i+2]; + } + } + } else { + temp.nx = img->nx; + temp.ny = img->ny; + temp.size = img->size; + temp.data = img->data; + } + + const int nx = temp.nx; + const int ny = temp.ny; + + const int nx2 = ctx->vision_model.hparams.image_size; + const int ny2 = ctx->vision_model.hparams.image_size; + + res->nx = nx2; + res->ny = ny2; + res->size = 3 * nx2 * ny2; + res->data = new float[res->size](); + + const float scale = std::max(nx, ny) / (float)ctx->vision_model.hparams.image_size; + + const int nx3 = int(nx / scale + 0.5f); + const int ny3 = int(ny / scale + 0.5f); + + const auto & m3 = ctx->image_mean; // {0.48145466f, 0.4578275f, 0.40821073f}; + const auto & s3 = ctx->image_std; // {0.26862954f, 0.26130258f, 0.27577711f}; + + for (int y = 0; y < ny3; y++) { + for (int x = 0; x < nx3; x++) { + for (int c = 0; c < 3; c++) { + // linear interpolation + const float sx = (x + 0.5f) * scale - 0.5f; + const float sy = (y + 0.5f) * scale - 0.5f; + + const int x0 = std::max(0, (int)std::floor(sx)); + const int y0 = std::max(0, (int)std::floor(sy)); + + const int x1 = std::min(x0 + 1, nx - 1); + const int y1 = std::min(y0 + 1, ny - 1); + + const float dx = sx - x0; + const float dy = sy - y0; + + const int j00 = 3 * (y0 * nx + x0) + c; + const int j01 = 3 * (y0 * nx + x1) + c; + const int j10 = 3 * (y1 * nx + x0) + c; + const int j11 = 3 * (y1 * nx + x1) + c; + + const float v00 = temp.data[j00]; + const float v01 = temp.data[j01]; + const float v10 = temp.data[j10]; + const float v11 = temp.data[j11]; + + const float v0 = v00 * (1.0f - dx) + v01 * dx; + const float v1 = v10 * (1.0f - dx) + v11 * dx; + + const float v = v0 * (1.0f - dy) + v1 * dy; + + const uint8_t v2 = std::min(std::max(std::round(v), 0.0f), 255.0f); + + const int i = 3 * (y * nx3 + x) + c; + + res->data[i] = ((float(v2) / 255.0f) - m3[c]) / s3[c]; + } + } + } + + return true; +} + +void clip_free(clip_ctx * ctx) { + ggml_free(ctx->ctx); + gguf_free(ctx->ctx_gguf); + delete ctx; +} + +bool clip_image_encode(const clip_ctx * ctx, const int n_threads, clip_image_f32 * img, float * vec) { + if (!ctx->has_vision_encoder) { + printf("This gguf file seems to have no vision encoder\n"); + return false; + } + + clip_image_f32_batch imgs{}; + imgs.size = 1; + imgs.data = img; + return clip_image_batch_encode(ctx, n_threads, &imgs, vec); +} + +bool clip_image_batch_encode(const clip_ctx * ctx, const int n_threads, const clip_image_f32_batch * imgs, float * vec) { + + if (!ctx->has_vision_encoder) { + printf("This gguf file seems to have no vision encoder\n"); + return false; + } + + int batch_size = imgs->size; + if(ctx->has_llava_projector) { + GGML_ASSERT(batch_size == 1); // TODO: support multiple images + } + + // reset alloc buffer to clean the memory from previous invocations + ggml_allocr_reset(ctx->alloc); + + // build the inference graph + ggml_cgraph * gf = clip_image_build_graph(ctx, imgs); + ggml_allocr_alloc_graph(ctx->alloc, gf); + + struct ggml_cplan plan = ggml_graph_plan(gf, n_threads); + if (plan.work_size > 0) { + plan.work_data = (uint8_t *)malloc(plan.work_size); + } + + ggml_graph_compute(gf, &plan); + + // the last node is the embedding tensor +struct ggml_tensor * embeddings = gf->nodes[gf->n_nodes - 1]; + + // copy the embeddings to the location passed by the user + memcpy(vec, ggml_get_data_f32(embeddings), ggml_nbytes(embeddings)); + + if (plan.work_size > 0) { + free(plan.work_data); + } + + return true; +} + +bool clip_model_quantize(const char * fname_inp, const char * fname_out, const int itype) { + + ggml_type type = GGML_TYPE_Q4_1; + + switch (itype) { + case 2: + type = GGML_TYPE_Q4_0; + break; + case 3: + type = GGML_TYPE_Q4_1; + break; + case 6: + type = GGML_TYPE_Q5_0; + break; + case 7: + type = GGML_TYPE_Q5_1; + break; + case 8: + type = GGML_TYPE_Q8_0; + break; + default: + fprintf(stderr, "%s: invalid quantization type %d\n", __func__, itype); + return false; + }; + + auto ctx_clip = clip_model_load(fname_inp, 2); + const auto & ctx_src = ctx_clip->ctx_gguf; + const auto & ctx_data = ctx_clip->ctx; + + auto ctx_out = gguf_init_empty(); + gguf_set_kv(ctx_out, ctx_src); + gguf_set_val_u32(ctx_out, "general.quantization_version", GGML_QNT_VERSION); + gguf_set_val_u32(ctx_out, "general.file_type", itype); + + auto fout = std::ofstream(fname_out, std::ios::binary); + + const int n_tensors = gguf_get_n_tensors(ctx_src); + + for (int i = 0; i < n_tensors; ++i) { + const char * name = gguf_get_tensor_name(ctx_src, i); + struct ggml_tensor * cur = ggml_get_tensor(ctx_data, name); + gguf_add_tensor(ctx_out, cur); + } + + const size_t meta_size = gguf_get_meta_size(ctx_out); + for (size_t i = 0; i < meta_size; ++i) { + fout.put(0); + } + + // regexes of tensor names to be quantized + const std::vector k_names = { + ".*weight", + }; + + std::vector read_data(512); + std::vector work(512); + std::vector conv_buf(512); + std::vector hist_all(1 << 4, 0); + size_t total_size_org = 0; + size_t total_size_new = 0; + + for (int i = 0; i < n_tensors; ++i) { + const std::string name = gguf_get_tensor_name(ctx_src, i); + struct ggml_tensor * cur = ggml_get_tensor(ctx_data, name.c_str()); + + enum ggml_type new_type; + void * new_data; + size_t new_size; + + bool quantize = false; + for (const auto & s : k_names) { + if (std::regex_match(name, std::regex(s))) { + quantize = true; + break; + } + } + + // quantize only 2D tensors + quantize &= (cur->n_dims == 2); + + if (quantize) { + new_type = type; + const size_t n_elms = ggml_nelements(cur); + float * f32_data; + + switch (cur->type) { + case GGML_TYPE_F32: + f32_data = (float *)cur->data; + break; + case GGML_TYPE_F16: + if (conv_buf.size() < n_elms) { + conv_buf.resize(n_elms); + } + for (size_t j = 0; j < n_elms; ++j) { + conv_buf[j] = ggml_fp16_to_fp32(((ggml_fp16_t *)cur->data)[j]); + } + f32_data = (float *)conv_buf.data(); + break; + default: + printf("Please use an input file in f32 or f16\n"); + return false; + } + + if (work.size() < n_elms * 4) { + work.resize(n_elms * 4); + } + new_data = work.data(); + + std::vector hist_cur(1 << 4, 0); + + switch (new_type) { + case GGML_TYPE_Q4_0: { + new_size = ggml_quantize_q4_0(f32_data, new_data, n_elms, cur->ne[0], hist_cur.data()); + } break; + case GGML_TYPE_Q4_1: { + new_size = ggml_quantize_q4_1(f32_data, new_data, n_elms, cur->ne[0], hist_cur.data()); + } break; + case GGML_TYPE_Q5_0: { + new_size = ggml_quantize_q5_0(f32_data, new_data, n_elms, cur->ne[0], hist_cur.data()); + } break; + case GGML_TYPE_Q5_1: { + new_size = ggml_quantize_q5_1(f32_data, new_data, n_elms, cur->ne[0], hist_cur.data()); + } break; + case GGML_TYPE_Q8_0: { + new_size = ggml_quantize_q8_0(f32_data, new_data, n_elms, cur->ne[0], hist_cur.data()); + } break; + default: { + fprintf(stderr, "%s: unsupported quantization type %d\n", __func__, new_type); + return false; + } + } + + for (size_t j = 0; j < hist_cur.size(); ++j) { + hist_all[j] += hist_cur[j]; + } + } else { + new_type = cur->type; + new_data = cur->data; + new_size = ggml_nbytes(cur); + } + const size_t orig_size = ggml_nbytes(cur); + total_size_org += orig_size; + total_size_new += new_size; + gguf_set_tensor_type(ctx_out, name.c_str(), new_type); + gguf_set_tensor_data(ctx_out, name.c_str(), new_data, new_size); + fout.write((const char *)new_data, new_size); + size_t pad = GGML_PAD(new_size, gguf_get_alignment(ctx_out)) - new_size; + for (size_t j = 0; j < pad; ++j) { + fout.put(0); + } + + printf("%s: n_dims = %d | quantize=%d | size = %f MB -> %f MB\n", name.c_str(), cur->n_dims, quantize, + orig_size / 1024.0 / 1024.0, new_size / 1024.0 / 1024.0); + } + + // go back to beginning of file and write the updated metadata + fout.seekp(0, std::ios::beg); + std::vector meta(meta_size); + gguf_get_meta_data(ctx_out, meta.data()); + fout.write((const char *)meta.data(), meta_size); + + fout.close(); + + clip_free(ctx_clip); + gguf_free(ctx_out); + + { + printf("%s: original size = %8.2f MB\n", __func__, total_size_org / 1024.0 / 1024.0); + printf("%s: quantized size = %8.2f MB\n", __func__, total_size_new / 1024.0 / 1024.0); + + int64_t sum_all = 0; + for (size_t i = 0; i < hist_all.size(); ++i) { + sum_all += hist_all[i]; + } + + printf("%s: hist: ", __func__); + for (size_t i = 0; i < hist_all.size(); ++i) { + printf("%5.3f ", hist_all[i] / (float)sum_all); + } + printf("\n"); + } + + return true; +} + +int clip_n_mmproj_embd(struct clip_ctx * ctx) { + return ctx->vision_model.mm_2_b->ne[0]; +} + +int clip_n_patches(struct clip_ctx * ctx) { + auto & params = ctx->vision_model.hparams; + + return (params.image_size / params.patch_size) * (params.image_size / params.patch_size); +} + +size_t clip_embd_nbytes(struct clip_ctx * ctx) { + return clip_n_patches(ctx) * clip_n_mmproj_embd(ctx) * sizeof(float); +} diff --git a/examples/llava/clip.h b/examples/llava/clip.h new file mode 100644 index 000000000..3d7261e29 --- /dev/null +++ b/examples/llava/clip.h @@ -0,0 +1,73 @@ +#ifndef CLIP_H +#define CLIP_H + +#include "ggml.h" + +struct clip_ctx; + +#ifdef __cplusplus +extern "C" { +#endif + +struct clip_vision_hparams { + int32_t image_size; + int32_t patch_size; + int32_t hidden_size; + int32_t n_intermediate; + int32_t projection_dim; + int32_t n_head; + int32_t n_layer; + float eps; +}; + +struct clip_ctx * clip_model_load(const char * fname, const int verbosity); + +void clip_free(struct clip_ctx * ctx); + +size_t clip_embd_nbytes(struct clip_ctx * ctx); +int clip_n_patches(struct clip_ctx * ctx); +int clip_n_mmproj_embd(struct clip_ctx * ctx); + +// RGB uint8 image +struct clip_image_u8 { + int nx; + int ny; + uint8_t * data; + size_t size; +}; + +// RGB float32 image (NHWC) +// Memory layout: RGBRGBRGB... +struct clip_image_f32 { + int nx; + int ny; + float * data; + size_t size; +}; + +struct clip_image_u8_batch { + struct clip_image_u8 * data; + size_t size; +}; + +struct clip_image_f32_batch { + struct clip_image_f32 * data; + size_t size; +}; + +struct clip_image_u8 * make_clip_image_u8(); +struct clip_image_f32 * make_clip_image_f32(); +bool clip_image_load_from_file(const char * fname, struct clip_image_u8 * img); +bool clip_image_preprocess(const struct clip_ctx * ctx, const struct clip_image_u8 * img, struct clip_image_f32 * res, const bool pad2square); +bool clip_image_encode(const struct clip_ctx * ctx, const int n_threads, struct clip_image_f32 * img, float * vec); + +bool clip_image_batch_encode(const struct clip_ctx * ctx, const int n_threads, const struct clip_image_f32_batch * imgs, + float * vec); + +bool clip_model_quantize(const char * fname_inp, const char * fname_out, const int itype); + +#ifdef __cplusplus +} +#endif + +#endif // CLIP_H diff --git a/examples/llava/convert-image-encoder-to-gguf.py b/examples/llava/convert-image-encoder-to-gguf.py new file mode 100644 index 000000000..2f5eef199 --- /dev/null +++ b/examples/llava/convert-image-encoder-to-gguf.py @@ -0,0 +1,250 @@ +import argparse +import os +import json + +import torch +import numpy as np +from gguf import * +from transformers import CLIPModel, CLIPProcessor + +TEXT = "clip.text" +VISION = "clip.vision" + + +def k(raw_key: str, arch: str) -> str: + return raw_key.format(arch=arch) + + +def should_skip_tensor(name: str, has_text: bool, has_vision: bool, has_llava: bool) -> bool: + if name in ( + "logit_scale", + "text_model.embeddings.position_ids", + "vision_model.embeddings.position_ids", + ): + return True + + if has_llava and name in ["visual_projection.weight", "vision_model.post_layernorm.weight", "vision_model.post_layernorm.bias"]: + return True + + if name.startswith("v") and not has_vision: + return True + + if name.startswith("t") and not has_text: + return True + + return False + + +def get_tensor_name(name: str) -> str: + if "projection" in name: + return name + + if "mm_projector" in name: + return name.replace("model.mm_projector", "mm") + + return name.replace("text_model", "t").replace("vision_model", "v").replace("encoder.layers", "blk").replace("embeddings.", "").replace("_proj", "").replace("self_attn.", "attn_").replace("layer_norm", "ln").replace("layernorm", "ln").replace("mlp.fc1", "ffn_down").replace("mlp.fc2", "ffn_up").replace("embedding", "embd").replace("final", "post").replace("layrnorm", "ln") + + +def bytes_to_unicode(): + """ + Returns list of utf-8 byte and a corresponding list of unicode strings. + The reversible bpe codes work on unicode strings. + This means you need a large # of unicode characters in your vocab if you want to avoid UNKs. + When you're at something like a 10B token dataset you end up needing around 5K for decent coverage. + This is a signficant percentage of your normal, say, 32K bpe vocab. + To avoid that, we want lookup tables between utf-8 bytes and unicode strings. + And avoids mapping to whitespace/control characters the bpe code barfs on. + """ + bs = ( + list(range(ord("!"), ord("~") + 1)) + + list(range(ord("¡"), ord("¬") + 1)) + + list(range(ord("®"), ord("ÿ") + 1)) + ) + cs = bs[:] + n = 0 + for b in range(2**8): + if b not in bs: + bs.append(b) + cs.append(2**8 + n) + n += 1 + cs = [chr(n) for n in cs] + return dict(zip(bs, cs)) + + +ap = argparse.ArgumentParser(prog="convert_hf_to_gguf.py") +ap.add_argument("-m", "--model-dir", help="Path to model directory cloned from HF Hub", required=True) +ap.add_argument("--use-f32", action="store_true", default=False, help="Use f32 instead of f16") +ap.add_argument("--text-only", action="store_true", required=False, + help="Save a text-only model. It can't be used to encode images") +ap.add_argument("--vision-only", action="store_true", required=False, + help="Save a vision-only model. It can't be used to encode texts") +ap.add_argument("--llava-projector", help="Path to llava.projector file. If specified, save an image encoder for LLaVA models.") +ap.add_argument("--image-mean", nargs=3, type=float, required=False, help="Override image mean values") +ap.add_argument("--image-std", nargs=3, type=float, required=False, help="Override image std values") +ap.add_argument("-o", "--output-dir", help="Directory to save GGUF files. Default is the original model directory", default=None) + +args = ap.parse_args() + + +if args.text_only and args.vision_only: + print("--text-only and --image-only arguments cannot be specified at the same time.") + exit(1) + +if args.use_f32: + print("WARNING: Weights for the convolution op is always saved in f16, as the convolution op in GGML does not support 32-bit kernel weights yet.") + +# output in the same directory as the model if output_dir is None +dir_model = args.model_dir + + +with open(dir_model + "/vocab.json", "r", encoding="utf-8") as f: + vocab = json.load(f) + tokens = [key for key in vocab] + +with open(dir_model + "/config.json", "r", encoding="utf-8") as f: + config = json.load(f) + v_hparams = config["vision_config"] + t_hparams = config["text_config"] + +# possible data types +# ftype == 0 -> float32 +# ftype == 1 -> float16 +# +# map from ftype to string +ftype_str = ["f32", "f16"] + +ftype = 1 +if args.use_f32: + ftype = 0 + + +model = CLIPModel.from_pretrained(dir_model) +processor = CLIPProcessor.from_pretrained(dir_model) + +fname_middle = None +has_text_encoder = True +has_vision_encoder = True +has_llava_projector = False +if args.text_only: + fname_middle = "text-" + has_vision_encoder = False +elif args.vision_only: + fname_middle = "vision-" + has_text_encoder = False +elif args.llava_projector is not None: + fname_middle = "mmproj-" + has_text_encoder = False + has_llava_projector = True +else: + fname_middle = "" + +output_dir = args.output_dir if args.output_dir is not None else dir_model +os.makedirs(output_dir, exist_ok=True) +output_prefix = os.path.basename(output_dir).replace("ggml_", "") +fname_out = os.path.join(output_dir, f"{fname_middle}model-{ftype_str[ftype]}.gguf") +fout = GGUFWriter(path=fname_out, arch="clip") + +fout.add_bool("clip.has_text_encoder", has_text_encoder) +fout.add_bool("clip.has_vision_encoder", has_vision_encoder) +fout.add_bool("clip.has_llava_projector", has_llava_projector) +fout.add_file_type(ftype) +model_name = config["_name_or_path"] if "_name_or_path" in config else os.path.basename(dir_model) +fout.add_name(model_name) +if args.text_only: + fout.add_description("text-only CLIP model") +elif args.vision_only and not has_llava_projector: + fout.add_description("vision-only CLIP model") +elif has_llava_projector: + fout.add_description("image encoder for LLaVA") +else: + fout.add_description("two-tower CLIP model") + +if has_text_encoder: + # text_model hparams + fout.add_uint32(k(KEY_CONTEXT_LENGTH, TEXT), t_hparams["max_position_embeddings"]) + fout.add_uint32(k(KEY_EMBEDDING_LENGTH, TEXT), t_hparams["hidden_size"]) + fout.add_uint32(k(KEY_FEED_FORWARD_LENGTH, TEXT), t_hparams["intermediate_size"]) + fout.add_uint32("clip.text.projection_dim", t_hparams.get("projection_dim", config["projection_dim"])) + fout.add_uint32(k(KEY_ATTENTION_HEAD_COUNT, TEXT), t_hparams["num_attention_heads"]) + fout.add_float32(k(KEY_ATTENTION_LAYERNORM_EPS, TEXT), t_hparams["layer_norm_eps"]) + fout.add_uint32(k(KEY_BLOCK_COUNT, TEXT), t_hparams["num_hidden_layers"]) + fout.add_token_list(tokens) + +if has_vision_encoder: + # vision_model hparams + fout.add_uint32("clip.vision.image_size", v_hparams["image_size"]) + fout.add_uint32("clip.vision.patch_size", v_hparams["patch_size"]) + fout.add_uint32(k(KEY_EMBEDDING_LENGTH, VISION), v_hparams["hidden_size"]) + fout.add_uint32(k(KEY_FEED_FORWARD_LENGTH, VISION), v_hparams["intermediate_size"]) + fout.add_uint32("clip.vision.projection_dim", v_hparams.get("projection_dim", config["projection_dim"])) + fout.add_uint32(k(KEY_ATTENTION_HEAD_COUNT, VISION), v_hparams["num_attention_heads"]) + fout.add_float32(k(KEY_ATTENTION_LAYERNORM_EPS, VISION), v_hparams["layer_norm_eps"]) + block_count = v_hparams["num_hidden_layers"] - 1 if has_llava_projector else v_hparams["num_hidden_layers"] + fout.add_uint32(k(KEY_BLOCK_COUNT, VISION), block_count) + + image_mean = processor.image_processor.image_mean if args.image_mean is None else args.image_mean + image_std = processor.image_processor.image_std if args.image_std is None else args.image_std + fout.add_array("clip.vision.image_mean", image_mean) + fout.add_array("clip.vision.image_std", image_std) + +use_gelu = v_hparams["hidden_act"] == "gelu" +fout.add_bool("clip.use_gelu", use_gelu) + + +if has_llava_projector: + model.vision_model.encoder.layers.pop(-1) + projector = torch.load(args.llava_projector) + for name, data in projector.items(): + name = get_tensor_name(name) + if data.ndim == 2: + data = data.squeeze().numpy().astype(np.float16) + else: + data = data.squeeze().numpy().astype(np.float32) + + fout.add_tensor(name, data) + + print("Projector tensors added\n") + +state_dict = model.state_dict() +for name, data in state_dict.items(): + if should_skip_tensor(name, has_text_encoder, has_vision_encoder, has_llava_projector): + # we don't need this + print(f"skipping parameter: {name}") + continue + + name = get_tensor_name(name) + data = data.squeeze().numpy() + + n_dims = len(data.shape) + + # ftype == 0 -> float32, ftype == 1 -> float16 + ftype_cur = 0 + if n_dims == 4: + print(f"tensor {name} is always saved in f16") + data = data.astype(np.float16) + ftype_cur = 1 + elif ftype == 1: + if name[-7:] == ".weight" and n_dims == 2: + print(" Converting to float16") + data = data.astype(np.float16) + ftype_cur = 1 + else: + print(" Converting to float32") + data = data.astype(np.float32) + ftype_cur = 0 + else: + if data.dtype != np.float32: + print(" Converting to float32") + data = data.astype(np.float32) + ftype_cur = 0 + + print(f"{name} - {ftype_str[ftype_cur]} - shape = {data.shape}") + fout.add_tensor(name, data) + + +fout.write_header_to_file() +fout.write_kv_data_to_file() +fout.write_tensors_to_file() +fout.close() + +print("Done. Output file: " + fname_out) diff --git a/examples/llava/llava-surgery.py b/examples/llava/llava-surgery.py new file mode 100644 index 000000000..26294d9bd --- /dev/null +++ b/examples/llava/llava-surgery.py @@ -0,0 +1,30 @@ +import argparse +import glob +import os +import torch + + +ap = argparse.ArgumentParser() +ap.add_argument("-m", "--model", help="Path to LLaVA v1.5 model") +args = ap.parse_args() + +# find the model part that includes the the multimodal projector weights +path = sorted(glob.glob(f"{args.model}/pytorch_model*.bin"))[-1] +checkpoint = torch.load(path) + +# get a list of mm tensor names +mm_tensors = [k for k, v in checkpoint.items() if k.startswith("model.mm_projector")] + +# store these tensors in a new dictionary and torch.save them +projector = {name: checkpoint[name] for name in mm_tensors} +torch.save(projector, f"{args.model}/llava.projector") + +# remove these tensors from the checkpoint and save it again +for name in mm_tensors: + del checkpoint[name] + +torch.save(checkpoint, path) + +print("Done!") +print(f"Now you can convert {args.model} to a a regular LLaMA GGUF file.") +print(f"Also, use {args.model}/llava.projector to prepare a llava-encoder.gguf file.") diff --git a/examples/llava/llava-utils.h b/examples/llava/llava-utils.h new file mode 100644 index 000000000..79e237c86 --- /dev/null +++ b/examples/llava/llava-utils.h @@ -0,0 +1,145 @@ +#pragma once + +// this one and clip lib will be eventually merged to a single lib, let's keep it this way for now + +#include "common.h" +#include "llama.h" + +#include +#include +#include + +inline bool eval_image_embd(llama_context * ctx_llama, float * embd, int N, int n_batch, int * n_past) { + int n_embd = llama_n_embd(llama_get_model(ctx_llama)); + + for (int i = 0; i < N; i += n_batch) { + int n_eval = N - i; + if (n_eval > n_batch) { + n_eval = n_batch; + } + llama_batch batch = {int32_t(n_eval), nullptr, (embd+i*n_embd), nullptr, nullptr, nullptr, *n_past, 1, 0, }; + if (llama_decode(ctx_llama, batch)) { + fprintf(stderr, "%s : failed to eval\n", __func__); + return false; + } + *n_past += n_eval; + } + return true; +} + +inline bool eval_tokens(struct llama_context * ctx_llama, std::vector tokens, int n_batch, int * n_past) { + int N = (int) tokens.size(); + for (int i = 0; i < N; i += n_batch) { + int n_eval = (int) tokens.size() - i; + if (n_eval > n_batch) { + n_eval = n_batch; + } + if (llama_decode(ctx_llama, llama_batch_get_one(&tokens[i], n_eval, *n_past, 0))) { + fprintf(stderr, "%s : failed to eval\n", __func__); + return false; + } + *n_past += n_eval; + } + return true; +} + +inline bool eval_id(struct llama_context * ctx_llama, int id, int * n_past) { + std::vector tokens; + tokens.push_back(id); + return eval_tokens(ctx_llama, tokens, 1, n_past); +} + +inline bool eval_string(struct llama_context * ctx_llama, const char* str, int n_batch, int * n_past){ + std::string str2 = str; + std::vector embd_inp = ::llama_tokenize(ctx_llama, str2, true); + eval_tokens(ctx_llama, embd_inp, n_batch, n_past); + return true; +} + +// TODO: use common/sampling.h +inline llama_token sample_id(llama_context * ctx_llama, gpt_params & params) { + // out of user input, sample next token + const float temp = params.sampling_params.temp; + const int32_t top_k = params.sampling_params.top_k <= 0 ? llama_n_vocab(llama_get_model(ctx_llama)) : params.sampling_params.top_k; + const float top_p = params.sampling_params.top_p; + const float tfs_z = params.sampling_params.tfs_z; + const float typical_p = params.sampling_params.typical_p; + // const int32_t repeat_last_n = params.sampling_params.repeat_last_n < 0 ? n_ctx : params.sampling_params.repeat_last_n; + // const float repeat_penalty = params.sampling_params.repeat_penalty; + // const float alpha_presence = params.sampling_params.presence_penalty; + // const float alpha_frequency = params.sampling_params.frequency_penalty; + const int mirostat = params.sampling_params.mirostat; + const float mirostat_tau = params.sampling_params.mirostat_tau; + const float mirostat_eta = params.sampling_params.mirostat_eta; + // const bool penalize_nl = params.sampling_params.penalize_nl; + + llama_token id = 0; + { + auto logits = llama_get_logits(ctx_llama); + auto n_vocab = llama_n_vocab(llama_get_model(ctx_llama)); + + // Apply params.logit_bias map + for (auto it = params.sampling_params.logit_bias.begin(); it != params.sampling_params.logit_bias.end(); it++) { + logits[it->first] += it->second; + } + + std::vector candidates; + candidates.reserve(n_vocab); + for (llama_token token_id = 0; token_id < n_vocab; token_id++) { + candidates.emplace_back(llama_token_data{token_id, logits[token_id], 0.0f}); + } + + llama_token_data_array candidates_p = { candidates.data(), candidates.size(), false }; + + // TODO: Apply penalties + // float nl_logit = logits[llama_token_nl(ctx)]; + // auto last_n_repeat = std::min(std::min((int)last_n_tokens.size(), repeat_last_n), n_ctx); + // llama_sample_repetition_penalty(ctx, &candidates_p, + // last_n_tokens.data() + last_n_tokens.size() - last_n_repeat, + // last_n_repeat, repeat_penalty); + // llama_sample_frequency_and_presence_penalties(ctx, &candidates_p, + // last_n_tokens.data() + last_n_tokens.size() - last_n_repeat, + // last_n_repeat, alpha_frequency, alpha_presence); + // if (!penalize_nl) { + // logits[llama_token_nl(ctx)] = nl_logit; + // } + + if (temp <= 0) { + // Greedy sampling + id = llama_sample_token_greedy(ctx_llama, &candidates_p); + } else { + if (mirostat == 1) { + static float mirostat_mu = 2.0f * mirostat_tau; + const int mirostat_m = 100; + llama_sample_temp(ctx_llama, &candidates_p, temp); + id = llama_sample_token_mirostat(ctx_llama, &candidates_p, mirostat_tau, mirostat_eta, mirostat_m, &mirostat_mu); + } else if (mirostat == 2) { + static float mirostat_mu = 2.0f * mirostat_tau; + llama_sample_temp(ctx_llama, &candidates_p, temp); + id = llama_sample_token_mirostat_v2(ctx_llama, &candidates_p, mirostat_tau, mirostat_eta, &mirostat_mu); + } else { + // Temperature sampling + llama_sample_top_k(ctx_llama, &candidates_p, top_k, 1); + llama_sample_tail_free(ctx_llama, &candidates_p, tfs_z, 1); + llama_sample_typical(ctx_llama, &candidates_p, typical_p, 1); + llama_sample_top_p(ctx_llama, &candidates_p, top_p, 1); + llama_sample_temp(ctx_llama, &candidates_p, temp); + id = llama_sample_token(ctx_llama, &candidates_p); + } + } + } + + return id; +} + +inline const char * sample(struct llama_context * ctx_llama, gpt_params & params, int * n_past) { + int id = sample_id(ctx_llama, params); + static std::string ret; + if (id == llama_token_eos(ctx_llama)) { + ret = ""; + } else { + ret = llama_token_to_piece(ctx_llama, id); + } + eval_id(ctx_llama, id, n_past); + return ret.c_str(); +} diff --git a/examples/llava/llava.cpp b/examples/llava/llava.cpp new file mode 100644 index 000000000..14dacc780 --- /dev/null +++ b/examples/llava/llava.cpp @@ -0,0 +1,156 @@ +#include "clip.h" +#include "llava-utils.h" +#include "common.h" +#include "llama.h" + +#include +#include +#include + +static void show_additional_info(int /*argc*/, char ** argv) { + printf("\n example usage: %s -m --mmproj --image [--temp 0.1] [-p \"describe the image in detail.\"]\n", argv[0]); + printf(" note: a lower temperature value like 0.1 is recommended for better quality.\n"); +} + +int main(int argc, char ** argv) { + ggml_time_init(); + + gpt_params params; + + if (!gpt_params_parse(argc, argv, params)) { + show_additional_info(argc, argv); + return 1; + } + + if (params.mmproj.empty() || params.image.empty()) { + gpt_print_usage(argc, argv, params); + show_additional_info(argc, argv); + return 1; + } + + const char * clip_path = params.mmproj.c_str(); + const char * img_path = params.image.c_str(); + + if (params.prompt.empty()) { + params.prompt = "describe the image in detail."; + } + + auto ctx_clip = clip_model_load(clip_path, /*verbosity=*/ 1); + + // load and preprocess the image + clip_image_u8 img; + clip_image_f32 img_res; + + if (!clip_image_load_from_file(img_path, &img)) { + fprintf(stderr, "%s: is %s really an image file?\n", __func__, img_path); + + clip_free(ctx_clip); + return 1; + } + + if (!clip_image_preprocess(ctx_clip, &img, &img_res, /*pad2square =*/ true)) { + fprintf(stderr, "%s: unable to preprocess %s\n", __func__, img_path); + + clip_free(ctx_clip); + return 1; + } + + int n_img_pos = clip_n_patches(ctx_clip); + int n_img_embd = clip_n_mmproj_embd(ctx_clip); + + float * image_embd = (float *)malloc(clip_embd_nbytes(ctx_clip)); + + if (!image_embd) { + fprintf(stderr, "Unable to allocate memory for image embeddings\n"); + + return 1; + } + + const int64_t t_img_enc_start_us = ggml_time_us(); + if (!clip_image_encode(ctx_clip, params.n_threads, &img_res, image_embd)) { + fprintf(stderr, "Unable to encode image\n"); + + return 1; + } + const int64_t t_img_enc_end_us = ggml_time_us(); + + // we get the embeddings, free up the memory required for CLIP + clip_free(ctx_clip); + + llama_backend_init(params.numa); + + llama_model_params model_params = llama_model_default_params(); + llama_model * model = llama_load_model_from_file(params.model.c_str(), model_params); + if (model == NULL) { + fprintf(stderr , "%s: error: unable to load model\n" , __func__); + return 1; + } + + llama_context_params ctx_params = llama_context_default_params(); + + ctx_params.n_ctx = params.n_ctx < 2048 ? 2048 : params.n_ctx; // we need a longer context size to process image embeddings + ctx_params.n_threads = params.n_threads; + ctx_params.n_threads_batch = params.n_threads_batch == -1 ? params.n_threads : params.n_threads_batch; + + llama_context * ctx_llama = llama_new_context_with_model(model, ctx_params); + + if (ctx_llama == NULL) { + fprintf(stderr , "%s: error: failed to create the llama_context\n" , __func__); + return 1; + } + + // make sure that the correct mmproj was used, i.e., compare apples to apples + int n_llama_embd = llama_n_embd(llama_get_model(ctx_llama)); + if (n_img_embd != n_llama_embd) { + printf("%s: embedding dim of the multimodal projector (%d) is not equal to that of LLaMA (%d). Make sure that you use the correct mmproj file.\n", __func__, n_img_embd, n_llama_embd); + + llama_free(ctx_llama); + llama_free_model(model); + llama_backend_free(); + free(image_embd); + + return 1; + } + + // process the prompt + // llava chat format is "USER: \n\nASSISTANT:" + + int n_past = 0; + + const int max_tgt_len = params.n_predict < 0 ? 256 : params.n_predict; + + // GG: are we sure that the should be a trailing whitespace at the end of this string? + eval_string(ctx_llama, "A chat between a curious human and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the human's questions.\nUSER: ", params.n_batch, &n_past); + eval_image_embd(ctx_llama, image_embd, n_img_pos, params.n_batch, &n_past); + eval_string(ctx_llama, params.prompt.c_str(), params.n_batch, &n_past); + eval_string(ctx_llama, "\nASSISTANT:", params.n_batch, &n_past); + + // generate the response + + printf("\n"); + + for (int i = 0; i < max_tgt_len; i++) { + const char * tmp = sample(ctx_llama, params, &n_past); + if (strcmp(tmp, "") == 0) break; + + printf("%s", tmp); + fflush(stdout); + } + + printf("\n"); + + { + const float t_img_enc_ms = (t_img_enc_end_us - t_img_enc_start_us) / 1000.0; + + printf("\n%s: image encoded in %8.2f ms by CLIP (%8.2f ms per image patch)\n", __func__, t_img_enc_ms, t_img_enc_ms / n_img_pos); + } + + llama_print_timings(ctx_llama); + + llama_free(ctx_llama); + llama_free_model(model); + llama_backend_free(); + free(image_embd); + + return 0; +} diff --git a/examples/main/main.cpp b/examples/main/main.cpp index 775a5a201..55f73356f 100644 --- a/examples/main/main.cpp +++ b/examples/main/main.cpp @@ -109,6 +109,7 @@ int main(int argc, char ** argv) { if (!gpt_params_parse(argc, argv, params)) { return 1; } + llama_sampling_params & sparams = params.sampling_params; #ifndef LOG_DISABLE_LOGS log_set_target(log_filename_generator("main", "log")); @@ -179,7 +180,7 @@ int main(int argc, char ** argv) { // load the model and apply lora adapter, if any LOG("%s: load the model and apply lora adapter, if any\n", __func__); std::tie(model, ctx) = llama_init_from_gpt_params(params); - if (params.cfg_scale > 1.f) { + if (sparams.cfg_scale > 1.f) { struct llama_context_params lparams = llama_context_params_from_gpt_params(params); ctx_guidance = llama_new_context_with_model(model, lparams); } @@ -257,9 +258,9 @@ int main(int argc, char ** argv) { int guidance_offset = 0; int original_prompt_len = 0; if (ctx_guidance) { - LOG("cfg_negative_prompt: \"%s\"\n", log_tostr(params.cfg_negative_prompt)); + LOG("cfg_negative_prompt: \"%s\"\n", log_tostr(sparams.cfg_negative_prompt)); - guidance_inp = ::llama_tokenize(ctx_guidance, params.cfg_negative_prompt, add_bos); + guidance_inp = ::llama_tokenize(ctx_guidance, sparams.cfg_negative_prompt, add_bos); LOG("guidance_inp tokenized: %s\n", LOG_TOKENS_TOSTR_PRETTY(ctx_guidance, guidance_inp)); std::vector original_inp = ::llama_tokenize(ctx, params.prompt, add_bos); @@ -296,6 +297,9 @@ int main(int argc, char ** argv) { LOG_TEE("%s: session file matches %zu / %zu tokens of prompt\n", __func__, n_matching_session_tokens, embd_inp.size()); } + + // remove any "future" tokens that we might have inherited from the previous session + llama_kv_cache_tokens_rm(ctx, n_matching_session_tokens, -1); } LOGLN( @@ -343,7 +347,7 @@ int main(int argc, char ** argv) { if (ctx_guidance) { LOG_TEE("\n"); - LOG_TEE("%s: negative prompt: '%s'\n", __func__, params.cfg_negative_prompt.c_str()); + LOG_TEE("%s: negative prompt: '%s'\n", __func__, sparams.cfg_negative_prompt.c_str()); LOG_TEE("%s: number of tokens in negative prompt = %zu\n", __func__, guidance_inp.size()); for (int i = 0; i < (int) guidance_inp.size(); i++) { LOG_TEE("%6d -> '%s'\n", guidance_inp[i], llama_token_to_piece(ctx, guidance_inp[i]).c_str()); @@ -395,7 +399,7 @@ int main(int argc, char ** argv) { } } LOG_TEE("sampling: repeat_last_n = %d, repeat_penalty = %f, presence_penalty = %f, frequency_penalty = %f, top_k = %d, tfs_z = %f, top_p = %f, typical_p = %f, temp = %f, mirostat = %d, mirostat_lr = %f, mirostat_ent = %f\n", - params.repeat_last_n, params.repeat_penalty, params.presence_penalty, params.frequency_penalty, params.top_k, params.tfs_z, params.top_p, params.typical_p, params.temp, params.mirostat, params.mirostat_eta, params.mirostat_tau); + sparams.repeat_last_n, sparams.repeat_penalty, sparams.presence_penalty, sparams.frequency_penalty, sparams.top_k, sparams.tfs_z, sparams.top_p, sparams.typical_p, sparams.temp, sparams.mirostat, sparams.mirostat_eta, sparams.mirostat_tau); LOG_TEE("generate: n_ctx = %d, n_batch = %d, n_predict = %d, n_keep = %d\n", n_ctx, params.n_batch, params.n_predict, params.n_keep); LOG_TEE("\n\n"); @@ -413,8 +417,8 @@ int main(int argc, char ** argv) { LOG_TEE("\n"); { - auto it = params.logit_bias.find(llama_token_eos(ctx)); - if (it != params.logit_bias.end() && it->second == -INFINITY) { + auto it = sparams.logit_bias.find(llama_token_eos(ctx)); + if (it != sparams.logit_bias.end() && it->second == -INFINITY) { LOG_TEE("%s: warning: EOS token is disabled, which will cause most grammars to fail\n", __func__); } } @@ -469,6 +473,7 @@ int main(int argc, char ** argv) { const int n_vocab = llama_n_vocab(model); + llama_sampling_context ctx_sampling = llama_sampling_context_init(params, grammar); std::vector candidates; candidates.reserve(n_vocab); @@ -543,9 +548,6 @@ int main(int argc, char ** argv) { if (i > 0) { embd.erase(embd.begin(), embd.begin() + i); } - - // remove any "future" tokens that we might have inherited from the session from the KV cache - llama_kv_cache_tokens_rm(ctx, n_past, -1); } // evaluate tokens in batches @@ -625,7 +627,7 @@ int main(int argc, char ** argv) { LOG("saved session to %s\n", path_session.c_str()); } - const llama_token id = llama_sample_token(ctx, ctx_guidance, grammar, params, last_tokens, candidates); + const llama_token id = llama_sampling_sample(ctx, ctx_guidance, ctx_sampling, last_tokens, candidates); last_tokens.erase(last_tokens.begin()); last_tokens.push_back(id); diff --git a/examples/parallel/parallel.cpp b/examples/parallel/parallel.cpp index 04f1e45b9..63ddcd8ed 100644 --- a/examples/parallel/parallel.cpp +++ b/examples/parallel/parallel.cpp @@ -125,6 +125,8 @@ int main(int argc, char ** argv) { params.logits_all = true; std::tie(model, ctx) = llama_init_from_gpt_params(params); + llama_sampling_context ctx_sampling = llama_sampling_context_init(params, NULL); + // load the prompts from an external file if there are any if (params.prompt.empty()) { printf("\n\033[32mNo new questions so proceed with build-in defaults.\033[0m\n"); @@ -339,7 +341,7 @@ int main(int argc, char ** argv) { //printf("client %d, seq %d, token %d, pos %d, batch %d\n", // client.id, client.seq_id, client.sampled, client.n_decoded, client.i_batch); - const llama_token id = llama_sample_token(ctx, NULL, NULL, params, client.tokens_prev, candidates, client.i_batch - i); + const llama_token id = llama_sampling_sample(ctx, NULL, ctx_sampling, client.tokens_prev, candidates, client.i_batch - i, client.seq_id); if (client.n_decoded == 1) { // start measuring generation time after the first token to make sure all concurrent clients @@ -384,7 +386,7 @@ int main(int argc, char ** argv) { n_total_prompt += client.n_prompt; n_total_gen += client.n_decoded; - + llama_sampling_context_reset(ctx_sampling, client.seq_id); client.seq_id = -1; } diff --git a/examples/save-load-state/save-load-state.cpp b/examples/save-load-state/save-load-state.cpp index acc6dbdfd..f9e3c98a3 100644 --- a/examples/save-load-state/save-load-state.cpp +++ b/examples/save-load-state/save-load-state.cpp @@ -8,9 +8,10 @@ int main(int argc, char ** argv) { gpt_params params; + llama_sampling_params & sparams = params.sampling_params; params.seed = 42; params.n_threads = 4; - params.repeat_last_n = 64; + sparams.repeat_last_n = 64; params.prompt = "The quick brown fox"; if (!gpt_params_parse(argc, argv, params)) { @@ -24,7 +25,7 @@ int main(int argc, char ** argv) { } auto n_past = 0; - auto last_n_tokens_data = std::vector(params.repeat_last_n, 0); + auto last_n_tokens_data = std::vector(sparams.repeat_last_n, 0); // init llama_model * model; diff --git a/examples/server/index.html.hpp b/examples/server/index.html.hpp index f30232929..58e3387d1 100644 --- a/examples/server/index.html.hpp +++ b/examples/server/index.html.hpp @@ -201,2103 +201,2284 @@ unsigned char index_html[] = { 0x65, 0x6d, 0x20, 0x30, 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0x70, 0x6c, 0x65, 0x74, 0x69, 0x6f, 0x6e, 0x43, 0x6f, 0x6e, + 0x74, 0x72, 0x6f, 0x6c, 0x73, 0x7d, 0x20, 0x2f, 0x3e, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x3c, 0x2f, 0x73, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x3e, 0x0a, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x3c, 0x66, 0x6f, 0x6f, 0x74, 0x65, @@ -2335,4 +2516,4 @@ unsigned char index_html[] = { 0x64, 0x69, 0x76, 0x3e, 0x0a, 0x3c, 0x2f, 0x62, 0x6f, 0x64, 0x79, 0x3e, 0x0a, 0x0a, 0x3c, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0x0a }; -unsigned int index_html_len = 28018; +unsigned int index_html_len = 30190; diff --git a/examples/server/public/index.html b/examples/server/public/index.html index 1bf2a8b3a..f539884e2 100644 --- a/examples/server/public/index.html +++ b/examples/server/public/index.html @@ -136,6 +136,11 @@ display: block; } + fieldset label.slim { + margin: 0 0.5em; + display: inline; + } + header, footer { text-align: center; } @@ -145,6 +150,14 @@ color: #888; } + .mode-chat textarea[name=prompt] { + height: 4.5em; + } + + .mode-completion textarea[name=prompt] { + height: 10em; + } + @keyframes loading-bg-wipe { 0% { @@ -187,7 +200,7 @@ template: "{{prompt}}\n\n{{history}}\n{{char}}:", historyTemplate: "{{name}}: {{message}}", transcript: [], - type: "chat", + type: "chat", // "chat" | "completion" char: "Llama", user: "User", }) @@ -365,13 +378,44 @@ return String(str).replaceAll(/\{\{(.*?)\}\}/g, (_, key) => template(settings[key])); } + async function runLlama(prompt, llamaParams, char) { + const currentMessages = []; + const history = session.value.transcript; + if (controller.value) { + throw new Error("already running"); + } + controller.value = new AbortController(); + for await (const chunk of llama(prompt, llamaParams, {controller: controller.value})) { + const data = chunk.data; + + if (data.stop) { + while ( + currentMessages.length > 0 && + currentMessages[currentMessages.length - 1].content.match(/\n$/) != null + ) { + currentMessages.pop(); + } + transcriptUpdate([...history, [char, currentMessages]]) + console.log("Completion finished: '", currentMessages.map(msg => msg.content).join(''), "', summary: ", data); + } else { + currentMessages.push(data); + transcriptUpdate([...history, [char, currentMessages]]) + } + + if (data.timings) { + llamaStats.value = data.timings; + } + } + + controller.value = null; + } + // send message to server const chat = async (msg) => { if (controller.value) { console.log('already running...'); return; } - controller.value = new AbortController(); transcriptUpdate([...session.value.transcript, ["{{user}}", msg]]) @@ -391,55 +435,41 @@ ).join("\n"), }); - const currentMessages = []; - const history = session.value.transcript - - const llamaParams = { + await runLlama(prompt, { ...params.value, stop: ["", template("{{char}}:"), template("{{user}}:")], + }, "{{char}}"); + } + + const runCompletion = async () => { + if (controller.value) { + console.log('already running...'); + return; } + const {prompt} = session.value; + transcriptUpdate([...session.value.transcript, ["", prompt]]); + await runLlama(prompt, { + ...params.value, + stop: [], + }, ""); + } - for await (const chunk of llama(prompt, llamaParams, { controller: controller.value })) { - const data = chunk.data; - - if (data.stop) { - while ( - currentMessages.length > 0 && - currentMessages[currentMessages.length - 1].content.match(/\n$/) != null - ) { - currentMessages.pop(); - } - transcriptUpdate([...history, ["{{char}}", currentMessages]]) - console.log("Completion finished: '", currentMessages.map(msg => msg.content).join(''), "', summary: ", data); - } else { - currentMessages.push(data); - transcriptUpdate([...history, ["{{char}}", currentMessages]]) - } - - if (data.timings) { - llamaStats.value = data.timings; - } + const stop = (e) => { + e.preventDefault(); + if (controller.value) { + controller.value.abort(); + controller.value = null; } + } - controller.value = null; + const reset = (e) => { + stop(e); + transcriptUpdate([]); } function MessageInput() { const message = useSignal("") - const stop = (e) => { - e.preventDefault(); - if (controller.value) { - controller.value.abort(); - controller.value = null; - } - } - - const reset = (e) => { - stop(e); - transcriptUpdate([]); - } - const submit = (e) => { stop(e); chat(message.value); @@ -474,6 +504,19 @@ ` } + function CompletionControls() { + const submit = (e) => { + stop(e); + runCompletion(); + } + return html` +
+ + + +
`; + } + const ChatLog = (props) => { const messages = session.value.transcript; const container = useRef(null) @@ -497,7 +540,11 @@ data; message = html`<${Markdownish} text=${template(text)} />` } - return html`

${template(user)}: ${message}

` + if(user) { + return html`

${template(user)}: ${message}

` + } else { + return html`

${message}

` + } }; return html` @@ -574,18 +621,31 @@ userTemplateAutosave() }, [session.value, params.value]) - return html` -
-
- <${UserTemplateResetButton}/> -
+ const GrammarControl = () => ( + html` +
+ +