Build webp

codecs/webp/wasm_build/simd/dec/webp_dec.cpp

@@ -0,0 +1,29 @@
+#include <string>
+#include "emscripten/bind.h"
+#include "emscripten/val.h"
+#include "webp/decode.h"
+#include "webp/demux.h"
+
+using namespace emscripten;
+
+int version() {
+  return WebPGetDecoderVersion();
+}
+
+thread_local const val Uint8ClampedArray = val::global("Uint8ClampedArray");
+thread_local const val ImageData = val::global("ImageData");
+
+val decode(std::string buffer) {
+  int width, height;
+  std::unique_ptr<uint8_t[]> rgba(
+      WebPDecodeRGBA((const uint8_t*)buffer.c_str(), buffer.size(), &width, &height));
+  return rgba ? ImageData.new_(
+                    Uint8ClampedArray.new_(typed_memory_view(width * height * 4, rgba.get())),
+                    width, height)
+              : val::null();
+}
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  function("decode", &decode);
+  function("version", &version);
+}