lol

codecs/qoi/enc/qoi_enc.cpp

@@ -1,6 +1,8 @@
 #include <emscripten/bind.h>
 #include <emscripten/val.h>
 
+#include <vector>
+
 #define QOI_IMPLEMENTATION
 #include "qoi.h"
 
@@ -15,10 +17,19 @@ val encode(std::string buffer, int width, int height, QoiOptions options) {
   qoi_desc desc;
   desc.width = width;
   desc.height = height;
-  desc.channels = 4;
+  desc.channels = 3;
   desc.colorspace = QOI_SRGB;
 
-  void* encodedData = qoi_encode(buffer.c_str(), &desc, &compressedSizeInBytes);
+  auto rgba_buffer = buffer.c_str();
+  auto num_pixels = width * height;
+  std::vector<uint8_t> rgb_buffer(num_pixels * 3);
+  for(auto i = 0; i < num_pixels; i ++) {
+    rgb_buffer[i*3 + 0] = rgba_buffer[i*4 +0];
+    rgb_buffer[i*3 + 1] = rgba_buffer[i*4 +1];
+    rgb_buffer[i*3 + 2] = rgba_buffer[i*4 +2];
+  }
+
+  void* encodedData = qoi_encode(rgb_buffer.data(), &desc, &compressedSizeInBytes);
   if (encodedData == NULL)
     return val::null();