public void SetPixelSlow(int col, int row, byte red, byte green, byte blue, byte alpha) { int start = _rowLength * row + col * 4 + 1; int blockNum = start / _blockSize; start += ((blockNum + 1) * 5); start += _dataStart; _buffer[start] = red; _buffer[start + 1] = green; _buffer[start + 2] = blue; _buffer[start + 3] = alpha; }