BitMiracle.LibTiff.Classic.TiffRgbaImage.putRGBUAseparate8bittile C# (CSharp) Method

        private static void putRGBUAseparate8bittile(
            TiffRgbaImage img, int[] raster, int rasterOffset, int rasterShift,
            int x, int y, int width, int height,
            byte[] buffer, int offset1, int offset2, int offset3, int offset4, int bufferShift)
        {
            while (height-- > 0)
            {
                for (x = width; x-- > 0; )
                {
                    int av = buffer[offset4];
                    int rv = (buffer[offset1] * av + 127) / 255;
                    int gv = (buffer[offset2] * av + 127) / 255;
                    int bv = (buffer[offset3] * av + 127) / 255;
                    raster[rasterOffset] = PACK4(rv, gv, bv, av);
                    rasterOffset++;
                    offset1++;
                    offset2++;
                    offset3++;
                    offset4++;
                }

                offset1 += bufferShift;
                offset2 += bufferShift;
                offset3 += bufferShift;
                offset4 += bufferShift;

                rasterOffset += rasterShift;
            }
        }