using System;

namespace ScreenConnect;

public class WebPDecoder : ScreenCodec
{
	protected unsafe override void Process(byte* data, int width, int height, int stride)
	{
		fixed (byte* ptr = new byte[8])
		{
			ReadThroughCoder(null, ptr, 8, isEndOfBlock: false);
			if (*ptr != 82 || ptr[1] != 73 || ptr[2] != 70 || ptr[3] != 70)
			{
				throw new Exception("Header doesn't start with RIFF");
			}
			int num = 8 + (ptr[4] | (ptr[5] << 8) | (ptr[6] << 16) | (ptr[7] << 24));
			fixed (byte* ptr2 = new byte[num])
			{
				Extensions.CopyMemory(ptr, ptr2, 8);
				ReadThroughCoder(null, ptr2 + 8, num - 8, isEndOfBlock: false);
				NativeLibrarySingleton<Native.libwebp, Toolkit>.Instance.WebPDecodeBGRAInto(ptr2, num, data, stride * height, stride);
			}
		}
	}
}