First compiling encoder

codecs/basis/LICENSE.codec.md

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+

codecs/basis/Makefile

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+CODEC_URL := https://github.com/BinomialLLC/basis_universal/archive/refs/tags/v1.15_rel2.tar.gz
+CODEC_DIR := node_modules/basis
+BUILD_DIR := build
+ENVIRONMENT = node
+
+OUT_JS := enc/basis_enc.js # enc/basis_node_enc.js
+OUT_WASM := $(OUT_JS:.js=.wasm)
+
+CODEC_CPP_SOURCE_FILES := \
+	encoder/basisu_comp.cpp \
+	encoder/basisu_enc.cpp \
+	encoder/basisu_backend.cpp \
+	encoder/basisu_basis_file.cpp \
+	encoder/basisu_etc.cpp \
+	encoder/basisu_uastc_enc.cpp \
+	encoder/basisu_gpu_texture.cpp \
+	encoder/basisu_frontend.cpp \
+	encoder/basisu_bc7enc.cpp \
+	encoder/basisu_pvrtc1_4.cpp \
+	encoder/basisu_astc_decomp.cpp \
+	encoder/basisu_global_selector_palette_helpers.cpp \
+	encoder/basisu_resampler.cpp \
+	encoder/jpgd.cpp \
+	encoder/lodepng.cpp \
+	transcoder/basisu_transcoder.cpp
+
+CODEC_C_SOURCE_FILES := \
+	encoder/apg_bmp.c \
+	zstd/zstd.c
+
+CODEC_CPP_OBJECT_FILES := $(CODEC_CPP_SOURCE_FILES:.cpp=.o)
+CODEC_C_OBJECT_FILES := $(CODEC_C_SOURCE_FILES:.c=.o)
+CODEC_CPP_OBJECT_FILE_PATHS := $(addprefix $(CODEC_DIR)/, $(CODEC_CPP_OBJECT_FILES))
+CODEC_C_OBJECT_FILE_PATHS := $(addprefix $(CODEC_DIR)/, $(CODEC_C_OBJECT_FILES))
+
+.PHONY: all clean
+
+all: $(OUT_JS)
+
+# Define dependencies for all variations of build artifacts.
+$(filter enc/%,$(OUT_JS)): enc/basis_enc.cpp
+# $(filter dec/%,$(OUT_JS)): dec/mozjpeg_dec.cpp
+
+# enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js: ENVIRONMENT = node
+
+%.js: $(CODEC_CPP_OBJECT_FILE_PATHS) $(CODEC_C_OBJECT_FILE_PATHS)
+	$(CXX) \
+		-I $(CODEC_DIR)/encoder \
+		${CXXFLAGS} \
+		${LDFLAGS} \
+		--closure 1 \
+		--bind \
+		-s ALLOW_MEMORY_GROWTH=1 \
+		-s MODULARIZE=1 \
+		-s TEXTDECODER=2 \
+		-s ENVIRONMENT=$(ENVIRONMENT) \
+		-s EXPORT_ES6=1 \
+		-o $@ \
+		$+ 
+
+$(CODEC_CPP_OBJECT_FILES): $(CODEC_DIR)
+	$(CXX) \
+		-o $@ \
+		-c $(@:.o=.cpp)
+
+$(CODEC_C_OBJECT_FILES): $(CODEC_DIR)
+	$(CC) \
+		-o $@ \
+		-c $(@:.o=.c)
+
+$(CODEC_DIR):
+	mkdir -p $@
+	curl -sL $(CODEC_URL) | tar xz --strip 1 -C $@
+
+clean:
+	$(RM) $(OUT_JS) $(OUT_WASM)

codecs/basis/enc/basis_enc.cpp

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+#include <emscripten/bind.h>
+#include <emscripten/val.h>
+#include <inttypes.h>
+#include "basisu_comp.h"
+#include "basisu_enc.h"
+
+using namespace emscripten;
+using namespace basisu;
+
+
+
+thread_local const val Uint8Array = val::global("Uint8Array");
+
+val encode(std::string image_in, int image_width, int image_height/*, MozJpegOptions opts*/) {
+  basis_compressor_params params;
+  basis_compressor compressor;
+  image img = image(reinterpret_cast<const uint8_t*>(image_in.c_str()), image_width, image_height, 4);
+  // We don’t need the encoder to read/decode files from the filesystem
+  params.m_read_source_images = false;
+  // Writing is unnecessary, too
+  params.m_read_source_images = false;
+  // Generate .basis file
+  params.m_uastc = true;
+  params.m_compression_level = 2; /* 0-4 */
+  params.m_source_images.push_back(img);
+
+  if(!compressor.init(params)) {
+    return val(std::string("Well something went wrong during init"));
+  }
+
+  if(compressor.process() != 0) {
+    return val(std::string("Well something went wrong during processing"));
+  }
+
+  auto comp_data = compressor.get_output_basis_file();
+  auto js_result = Uint8Array.new_(typed_memory_view(comp_data.size(), &comp_data[0]));
+  // Not sure if there is anything to free here
+  return js_result;
+}
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  // value_object<MozJpegOptions>("MozJpegOptions")
+  //     .field("quality", &MozJpegOptions::quality)
+  //     .field("baseline", &MozJpegOptions::baseline)
+  //     .field("arithmetic", &MozJpegOptions::arithmetic)
+  //     .field("progressive", &MozJpegOptions::progressive)
+  //     .field("optimize_coding", &MozJpegOptions::optimize_coding)
+  //     .field("smoothing", &MozJpegOptions::smoothing)
+  //     .field("color_space", &MozJpegOptions::color_space)
+  //     .field("quant_table", &MozJpegOptions::quant_table)
+  //     .field("trellis_multipass", &MozJpegOptions::trellis_multipass)
+  //     .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
+  //     .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
+  //     .field("trellis_loops", &MozJpegOptions::trellis_loops)
+  //     .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
+  //     .field("auto_subsample", &MozJpegOptions::auto_subsample)
+  //     .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
+  //     .field("chroma_quality", &MozJpegOptions::chroma_quality);
+
+  function("encode", &encode);
+}

codecs/basis/package.json

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+{
+  "scripts": {
+    "build": "../build-cpp.sh"
+  }
+}