Webp implementation for cocos2dx by martell malone

test.cpp

bool CCImage::_initWithWebpData(void * data, int nSize)
{
	WebPMuxError mux_err;
	WebPDecoderConfig config;
	WebPData defdata;
	WebPMux* mux;
	WebPDecBuffer* pic;
	
	int has_animation;
	
	uint32_t flags=0;
	int loop_count=1;
	int frame_num=1;
	int frame_max=0;

	
    if (!WebPInitDecoderConfig(&config)) {
    fprintf(stderr, "Library version mismatch!\n");
    return false;
  }
  
  
  defdata.bytes_ = (uint8_t*)data;
  defdata.size_ = (size_t)nSize;
  
    mux = WebPMuxCreate(&defdata, 0);
  if (mux == NULL) {
    fprintf(stderr, "Could not create demuxing object!\n");
    return false;
  }
 
  
  mux_err = WebPMuxGetFeatures(mux, &flags);
	
  if (mux_err != WEBP_MUX_OK) printf("Error in WebPMuxGetFeatures!\n");
  if (flags & TILE_FLAG) printf("Tiling is not supported for now!\n");
   
  has_animation = !!(flags & ANIMATION_FLAG);

  if (has_animation) {
    mux_err = WebPMuxGetLoopCount(mux, &loop_count);
    if (mux_err != WEBP_MUX_OK && mux_err != WEBP_MUX_NOT_FOUND) printf("Error in WebPMuxGetLoopCount!\n");
    
	mux_err = WebPMuxNumChunks(mux, WEBP_CHUNK_IMAGE,&frame_max);
    if (mux_err != WEBP_MUX_OK) printf("Error in WebPMuxNumChunks!\n");
	
    printf("VP8X: Found %d images in file (loop count = %d)\n",frame_max, loop_count);
  }

  // Decode first frame
    int duration;
  

  WebPData *pdata, image_data;
  int x_off = 0, y_off = 0;
  int ok = 0;

  if (has_animation) {
    if (WebPMuxGetFrame(mux, frame_num, &image_data,
                        &x_off, &y_off, &duration) != WEBP_MUX_OK) {
      goto end;
    }
    if (x_off != 0 || y_off != 0) {
      printf("Frame offsets not yet supported! Forcing offset to 0,0\n");
      x_off = y_off = 0;
    }
    pdata = &image_data;
  } else {
    pdata = &defdata;
  }

  config.output.colorspace = MODE_RGBA;
  ok = (WebPDecode(pdata->bytes_, pdata->size_, &config) == VP8_STATUS_OK);

 end:
  if (!ok) {
    fprintf(stderr, "Decoding of frame #%d failed!\n", frame_num);
  } else {

  
  m_pData = new unsigned char[config.output.u.RGBA.size];
  memcpy(m_pData, config.output.u.RGBA.rgba, config.output.u.RGBA.size);
  }

  m_nBitsPerComponent = 4;
  m_nHeight   = (short)config.output.height;
  m_nWidth    = (short)config.output.width;
  m_bHasAlpha = true;

  return true;
}