namespace ScreenConnect;

public class WebColorScreenEncoder(ICoder coder) : SimpleScreenEncoder(8, 0, coder)
{
	private readonly byte[] map = new byte[256]
	{
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 1, 1, 1, 1, 1, 1, 1, 1,
		1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
		1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
		1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
		1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
		2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
		2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
		2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
		2, 2, 2, 2, 2, 2, 2, 2, 3, 3,
		3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
		3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
		3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
		3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
		3, 4, 4, 4, 4, 4, 4, 4, 4, 4,
		4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
		4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
		4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
		4, 4, 4, 4, 5, 5, 5, 5, 5, 5,
		5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
		5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
		5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
		5, 5, 5, 5, 5, 5
	};

	protected unsafe override void ProcessRow(int* srcCursor, byte* dstCursor, int width, bool hasPadding)
	{
		fixed (byte* ptr = map)
		{
			for (int i = 0; i < width; i++)
			{
				int num = *(srcCursor++);
				*(dstCursor++) = (byte)(ptr[num & 0xFF] + ptr[(num >> 8) & 0xFF] * 6 + ptr[(num >> 16) & 0xFF] * 36);
			}
		}
	}
}