BitMiracle.LibTiff.Classic.TiffRgbaImage.put2bitbwtile C# (CSharp) Method

        private static void put2bitbwtile(
            TiffRgbaImage img, int[] raster, int rasterOffset, int rasterShift,
            int x, int y, int width, int height, byte[] buffer, int offset, int bufferShift)
        {
            int[][] BWmap = img.BWmap;
            bufferShift /= 4;

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

                int _x;
                for (_x = width; _x >= 4; _x -= 4)
                {
                    bw = BWmap[buffer[offset]];
                    offset++;
                    for (int rc = 0; rc < 4; rc++)
                    {
                        raster[rasterOffset] = bw[rc];
                        rasterOffset++;
                    }
                }

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

                    if (_x <= 3 && _x > 0)
                    {
                        for (int i = 0; i < _x; i++)
                        {
                            raster[rasterOffset] = bw[i];
                            rasterOffset++;
                        }
                    }
                }

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