How to get the player skin as BufferedImage, change it a few pixels and upload back to the player?

No, I do not want to upload to minecraft.net. I want to make a character editor (change the eyes, hair, clothes, etc.) directly in the game.

@SideOnly(Side.CLIENT)
public static BufferedImage getPlayerSkinAsBufferedImage(AbstractClientPlayer player){
	Minecraft mc = Minecraft.getMinecraft();
	String playerName = player.getCommandSenderName();
	Map<Type, MinecraftProfileTexture> map = mc.func_152342_ad().func_152788_a(player.getGameProfile());

	BufferedImage image = null;
	InputStream stream = null;
	ITextureObject skin;

	try{
		if(map.containsKey(MinecraftProfileTexture.Type.SKIN)){
			ResourceLocation loc = mc.func_152342_ad().func_152792_a(map.get(Type.SKIN), Type.SKIN);
			skin = mc.getTextureManager().getTexture(loc);
		}else{
			skin = mc.getTextureManager().getTexture(player.getLocationSkin());
		}

		if(skin instanceof ThreadDownloadImageData){
			ThreadDownloadImageData imageData = (ThreadDownloadImageData)skin;
			image = ObfuscationReflectionHelper.getPrivateValue(ThreadDownloadImageData.class, imageData, "field_110560_d", "bufferedImage");
			System.out.println("1");
		}else if(skin instanceof DynamicTexture){
			DynamicTexture imageData = (DynamicTexture)skin;
			int width = ObfuscationReflectionHelper.getPrivateValue(DynamicTexture.class, imageData, "field_94233_j", "width");
			int height = ObfuscationReflectionHelper.getPrivateValue(DynamicTexture.class, imageData, "field_94234_k", "height");
			image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
			image.setRGB(0, 0, width, height, imageData.getTextureData(), 0, width);
			System.out.println("2");
		}else{
			stream = mc.getResourceManager().getResource(AbstractClientPlayer.locationStevePng).getInputStream();
			image = ImageIO.read(stream);
			System.out.println("3");
		}
	}catch(IOException e){
		e.printStackTrace();
	}finally{
		IOUtils.closeQuietly(stream);
	}

	return image;
}

I took the skin and made me change. As it is now loaded back?

Bump.