BitMiracle.LibTiff.Classic.TiffRgbaImage.put1bitcmaptile C# (CSharp) Method

        private static void put1bitcmaptile(
            TiffRgbaImage img, int[] raster, int rasterOffset, int rasterShift,
            int x, int y, int width, int height, byte[] buffer, int offset, int bufferShift)
        {
            int[][] PALmap = img.PALmap;
            bufferShift /= 8;

            while (height-- > 0)
            {
                int[] bw;
                int bwPos = 0;

                int _x;
                for (_x = width; _x >= 8; _x -= 8)
                {
                    bw = PALmap[buffer[offset++]];
                    bwPos = 0;

                    for (int i = 0; i < 8; i++)
                        raster[rasterOffset++] = bw[bwPos++];
                }

                if (_x > 0)
                {
                    bw = PALmap[buffer[offset++]];
                    bwPos = 0;

                    if (_x <= 7 && _x > 0)
                    {
                        for (int i = 0; i < _x; i++)
                            raster[rasterOffset++] = bw[bwPos++];
                    }
                }

                rasterOffset += rasterShift;
                offset += bufferShift;
            }
        }