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webp-src/examples/dwebp.c  view on Meta::CPAN

static int WritePNG(const char* out_file_name,
                    const WebPDecBuffer* const buffer) {
  const uint32_t width = buffer->width;
  const uint32_t height = buffer->height;
  unsigned char* const rgb = buffer->u.RGBA.rgba;
  const int stride = buffer->u.RGBA.stride;
  const int has_alpha = (buffer->colorspace == MODE_BGRA);

  return SUCCEEDED(WriteUsingWIC(out_file_name,
                                 MAKE_REFGUID(GUID_ContainerFormatPng),
                                 rgb, stride, width, height, has_alpha));
}

#elif defined(WEBP_HAVE_PNG)    // !HAVE_WINCODEC_H
static void PNGAPI error_function(png_structp png, png_const_charp dummy) {
  (void)dummy;  // remove variable-unused warning
  longjmp(png_jmpbuf(png), 1);
}

static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {

webp-src/examples/wicdec.c  view on Meta::CPAN

  IWICBitmapDecoder* decoder = NULL;
  IStream* stream = NULL;
  UINT frame_count = 0;
  UINT width = 0, height = 0;
  BYTE* rgb = NULL;
  WICPixelFormatGUID src_pixel_format = GUID_WICPixelFormatUndefined;
  const WICFormatImporter* importer = NULL;
  GUID src_container_format = GUID_NULL_;
  static const GUID* kAlphaContainers[] = {
    &GUID_ContainerFormatBmp,
    &GUID_ContainerFormatPng,
    &GUID_ContainerFormatTiff,
    NULL
  };
  int has_alpha = 0;
  int stride;

  IFS(CoInitialize(NULL));
  IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
                       CLSCTX_INPROC_SERVER,
                       MAKE_REFGUID(IID_IWICImagingFactory),