Integrate QOI codec completely

* Adds code for encoders and decoders
* Cleans up some obsolete QOI-related code

codecs/qoi/dec/qoi_dec.cpp

@@ -10,12 +10,16 @@ thread_local const val Uint8ClampedArray = val::global("Uint8ClampedArray");
 thread_local const val ImageData = val::global("ImageData");
 
 val decode(std::string qoiimage) {
-  val result = val::null();
+  qoi_desc desc;
+  uint8_t* rgba = (uint8_t*)qoi_decode(qoiimage.c_str(), qoiimage.length(), &desc, 4);
 
-  const int N = 1000;
-  int data[N] = {0};
+  // Resultant width and height stored in descriptor
+  int decodedWidth = desc.width;
+  int decodedHeight = desc.height;
 
-  result = ImageData.new_(Uint8ClampedArray.new_(typed_memory_view(N, data)), 20, 50);
+  val result = ImageData.new_(
+      Uint8ClampedArray.new_(typed_memory_view(4 * decodedWidth * decodedHeight, rgba)),
+      decodedWidth, decodedHeight);
 
   return result;
 }

codecs/qoi/dec/qoi_dec.d.ts

@@ -0,0 +1,7 @@
+export interface QOIModule extends EmscriptenWasm.Module {
+  decode(data: BufferSource): ImageData | null;
+}
+
+declare var moduleFactory: EmscriptenWasm.ModuleFactory<QOIModule>;
+
+export default moduleFactory;

codecs/qoi/enc/qoi_enc.cpp

@@ -6,32 +6,29 @@
 
 using namespace emscripten;
 
-struct QoiOptions {
-  int quality;
-  bool randombool;
-};
+struct QoiOptions {};
 
 thread_local const val Uint8Array = val::global("Uint8Array");
 
 val encode(std::string buffer, int width, int height, QoiOptions options) {
-  printf("Starting encode!");
+  int compressedSizeInBytes;
+  qoi_desc desc;
+  desc.width = width;
+  desc.height = height;
+  desc.channels = 4;
+  desc.colorspace = QOI_SRGB;
 
-  printf("quality = %d\n", options.quality);
-  printf("randombool = %s\n", options.randombool ? "true" : "false");
+  void* encodedData = qoi_encode(buffer.c_str(), &desc, &compressedSizeInBytes);
+  if (encodedData == NULL)
+    return val::null();
 
-  auto js_result = val::null();
-
-  const int N = 100;
-  int* data = (int*)malloc(N * sizeof(int));
-
-  js_result = Uint8Array.new_(typed_memory_view(N, data));
+  auto js_result =
+      Uint8Array.new_(typed_memory_view(compressedSizeInBytes, (const uint8_t*)encodedData));
   return js_result;
 }
 
 EMSCRIPTEN_BINDINGS(my_module) {
-  value_object<QoiOptions>("QoiOptions")
-      .field("quality", &QoiOptions::quality)
-      .field("randombool", &QoiOptions::randombool);
+  value_object<QoiOptions>("QoiOptions");
 
   function("encode", &encode);
 }

codecs/qoi/enc/qoi_enc.d.ts

@@ -1,7 +1,4 @@
-export interface EncodeOptions {
-    quality: number;
-    randombool: boolean;
-}
+export interface EncodeOptions {}
 
 export interface QoiModule extends EmscriptenWasm.Module {
     encode(