private async Task ParseRawTile(PipeReader uncompressedReader, byte[] data, int x, int y, int tileWidth, int tileHeight, int rectangleWidth)
{
int tx = 0;
int ty = 0;
await uncompressedReader.ForEach(3, tileWidth *tileHeight, (mem) =>
{
var dataIndex = (((y + ty) * rectangleWidth) + x + tx) * 4;
data[dataIndex] = mem.Span[0];
data[dataIndex + 1] = mem.Span[1];
data[dataIndex + 2] = mem.Span[2];
data[dataIndex + 3] = 0xff;
tx += 1;
if (tx >= tileWidth)
{
tx = 0;
ty += 1;
}
});
}