Converting CAIRO BRBA to RGBA

swap_rgba

func swap_bgra_rgba(img_buf *image.RGBA) image.Image {
  
  var wtf = &bytes.Buffer{};

  png.Encode(wtf, img_buf);


  pic, _ := png.Decode( wtf ); // FIXMEIFMXE FIXME!!!!!!! -- WASTING CPU!!!

  b := pic.Bounds();

  // Get an interface which can set pixels
	picSet := pic.(ImageSet);

	for y := b.Min.Y; y < b.Max.Y; y++ {
		for x := b.Min.X; x < b.Max.X; x++ {
			col := pic.At(x, y);
			r, g, b, a := col.RGBA();
			// Swap blue and red
			newCol := color.RGBA{uint8(b >> 8), uint8(g >> 8), uint8(r >> 8), uint8(a >> 8)};
			picSet.Set(x, y, newCol);
		}
	}

	return pic;
}