iTextSharp.text.pdf.codec.BmpImage.ReadRLE8 C# (CSharp) Method

        private Image ReadRLE8()
        {
            // If imageSize field is not provided, calculate it.
            int imSize = (int)imageSize;
            if (imSize == 0) {
                imSize = (int)(bitmapFileSize - bitmapOffset);
            }

            // Read till we have the whole image
            byte[] values = new byte[imSize];
            int bytesRead = 0;
            while (bytesRead < imSize) {
                bytesRead += inputStream.Read(values, bytesRead,
                imSize - bytesRead);
            }

            // Since data is compressed, decompress it
            byte[] val = DecodeRLE(true, values);

            // Uncompressed data does not have any padding
            imSize = width * height;

            if (isBottomUp) {

                // Convert the bottom up image to a top down format by copying
                // one scanline from the bottom to the top at a time.
                // int bytesPerScanline = (int)Math.Ceil((double)width/8.0);
                byte[] temp = new byte[val.Length];
                int bytesPerScanline = width;
                for (int i=0; i<height; i++) {
                    Array.Copy(val,
                    imSize - (i+1)*(bytesPerScanline),
                    temp,
                    i*bytesPerScanline, bytesPerScanline);
                }
                val = temp;
            }
            return IndexedModel(val, 8, 4);
        }