SetParameters Method

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ColorConversion;

public byte[] GetCmykBufferFromImage(RasterImage bgrImage)
{
   // StartUp the ColorConversion.
   RasterColorConverterEngine.Startup();
   // Image buffer array
   byte[] bgrBuffer = new byte[bgrImage.BytesPerLine * bgrImage.Height];

   // get image buffer
   for (int i = 0; i < bgrImage.Height; i++)
       bgrImage.GetRow(i, bgrBuffer, i * bgrImage.BytesPerLine, bgrImage.BytesPerLine);

   // Initialize a new Converter object
   RasterColorConverterEngine converter = new RasterColorConverterEngine();

   byte[] cmykBuffer = new byte[bgrImage.Height * bgrImage.Width * 4];

   try
   {
      // Start the color conversion
      converter.Start(ConversionColorFormat.Bgr, ConversionColorFormat.Cmyk, null);

      // convert the image buffer 
      converter.Convert(bgrBuffer, // input buffer
         0, // offset from the begining of the source buffer
         cmykBuffer, // output buffer
         0, // offset from the begining of the destination buffer
         bgrImage.Width, // pixels width
         bgrImage.Height, // pixels height
         bgrImage.BytesPerLine - (bgrImage.Width * (bgrImage.BitsPerPixel / 8)),
         0); // 0 bytes align

      // stop the conversion
      converter.Stop();
   }
   catch (Exception ex)
   {
      MessageBox.Show(ex.Message);
   }

   RasterColorConverterEngine.Shutdown();

   return cmykBuffer;
}

public RasterImage GetImageFromCmykBuffer(byte[] cmykBuffer, int width, int height)
{
   // StartUp the ColorConversion.
   RasterColorConverterEngine.Startup();

   // Initialize a new Converter object
   RasterColorConverterEngine converter = new RasterColorConverterEngine();

   // Initialize an image to hold the converted buffer.
   RasterImage cmykImage = null;
   try
   {
      cmykImage = new RasterImage(RasterMemoryFlags.Conventional, width, height, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, IntPtr.Zero, 0);

      // Start the color conversion
      converter.Start(ConversionColorFormat.Cmyk, ConversionColorFormat.Bgr, null);

      // convert the image buffer
      converter.ConvertToImage(cmykBuffer, // converted buffer
         0,                // offset from the begining of the source buffer
         cmykImage,        // image to be save
         width,   // pixels width
         height,  // pixels height
         0,                // 0 bytes align
         cmykImage.BytesPerLine - (cmykImage.Width * (cmykImage.BitsPerPixel / 8)));

      // stop the conversion
      converter.Stop();
   }
   catch (Exception ex)
   {
      MessageBox.Show(ex.Message);
   }
   // Shutdown the ColorConversion.
   RasterColorConverterEngine.Shutdown();
   return cmykImage;
}

[TestMethod]
public void SetParametersExample()
{
   // Initialize the RasterCodecs
   RasterCodecs codecs = new RasterCodecs();

   // StartUp the ColorConversion.
   RasterColorConverterEngine.Startup();

   // The input file name
   string inputFileName = Path.Combine(LEAD_VARS.ImagesDir, "image1.cmp");

   // load the input image as Bgr.
   RasterImage bgrImage = codecs.Load(inputFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1);

   int width = bgrImage.Width;
   int height = bgrImage.Height;
   byte[] cmykBuffer = GetCmykBufferFromImage(bgrImage);

   // Initialize the Rgb buffer array
   byte[] rgbBuffer = new byte[cmykBuffer.Length - cmykBuffer.Length / 4];

   // Initialize a new Converter object
   RasterColorConverterEngine converter = new RasterColorConverterEngine();

   // Initialize a new ConversionParameters class object.
   ConversionParameters convParams = new ConversionParameters();

   // we want to use the built in LEAD ICC conversion method and built in conversion
   convParams.Method = ConversionMethodFlags.UseBuiltIn | ConversionMethodFlags.UseIcc;

   // set the active conversion method
   convParams.ActiveMethod = ConversionMethodFlags.UseBuiltIn;

   // Initialize WhitePoint property class.
   convParams.WhitePoint = new ConversionWhitePoint();

   // Set WhitePoint property.
   ConversionWhitePoint whitePoint = new ConversionWhitePoint();
   whitePoint.WhitePoint = ConversionWhitePointType.D50;
   convParams.WhitePoint = whitePoint;

   // Initialize CmykParameters property class.
   convParams.CmykParameters = new ConversionCmykParameters();

   // Set GcrLevel property.
   ConversionCmykParameters cmykParameters = new ConversionCmykParameters();
   cmykParameters.GcrLevel = 150;
   convParams.CmykParameters = cmykParameters;

   try
   {
      // Initialize the ColorConversion
      converter.Start(ConversionColorFormat.Cmyk, ConversionColorFormat.Rgb, convParams);

      // convert the Cmyk buffer to Rgb buffer using Built-in conversion.
      converter.Convert(cmykBuffer,
         0,
         rgbBuffer,
         0,
         width,
         height,
         0,
         bgrImage.BytesPerLine - (bgrImage.Width * (bgrImage.BitsPerPixel / 8)));

      // Change the active method for conversion
      convParams.Method = ConversionMethodFlags.ChangeActiveMethod | ConversionMethodFlags.ChangeCmyk;

      // Switch to ICC conversion method
      convParams.ActiveMethod = ConversionMethodFlags.UseIcc;

      // Set Mask property.
      cmykParameters.Mask = ConversionCmykMask.Gcr;

      // Set GcrLevel property.
      cmykParameters.GcrLevel = 175;
      convParams.CmykParameters = cmykParameters;

      // Update the conversion parameters
      converter.SetParameters(convParams);

      // convert the image buffer 
      converter.Convert(cmykBuffer, 0, rgbBuffer, 0, width, height, 0, 0);

      // Stop the ColorConversion
      converter.Stop();
   }
   catch(Exception ex)
   {
      MessageBox.Show(ex.Message);
      rgbBuffer = null;
   }

   // the output File Name.
   string outputFileName = Path.Combine(LEAD_VARS.ImagesDir, "ResultImage.bmp");

   // Save the converted Image
   RasterImage cmykImage = GetImageFromCmykBuffer(cmykBuffer, width, height);
   codecs.Save(cmykImage, outputFileName, RasterImageFormat.Bmp, 24);

   // Shutdown the ColorConversion.
   RasterColorConverterEngine.Shutdown();

   // Shutdown the RasterColor
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}