1. Code samples
2. Interoperability
3. System.Drawing interoperability

Process Non-RGB (System.Drawing Interop)

Interoperability Bitmap Metadata

Loads non-RGB image with Aurigma.GraphicsMill.Bitmap, pass it to System.Drawing.Bitmap and convert it back to Aurigma.GraphicsMill.Bitmap.

Сode Snippet

// Imagine that you have a legacy application which works with System.Drawing.Bitmap,
// and you need to work with non-RGB images. You should convert it to RGB with Graphics Mill, cast it
// to System.Drawing.Bitmap and convert back.
using (var reader = new JpegReader("Copenhagen_CMYK.jpg"))
using (var gmBitmap1 = reader.Frames[0].GetBitmap())
{
    Bitmap rgbGmBitmap = null;

    try
    {
        // Convert a non-RGB image to the RGB color space with the sRGB color profile
        if (!gmBitmap1.PixelFormat.IsRgb)
        {
            rgbGmBitmap = new Bitmap(gmBitmap1);
            rgbGmBitmap.ColorManagement.DestinationProfile = ColorProfile.FromSrgb();
            rgbGmBitmap.ColorManagement.Convert(PixelFormat.Format24bppRgb);
        }

        using (var sdBitmap = (System.Drawing.Bitmap)(gmBitmap1.PixelFormat.IsRgb ? gmBitmap1 : rgbGmBitmap))
        {
            // Here we modify System.Drawing.Bitmap
            Utils.ApplyWatermark(sdBitmap);

            using (var gmBitmap2 = (Bitmap)sdBitmap)
            {
                // Convert an RGB image to the source color space (CMYK, grayscale, or Lab)
                if (!gmBitmap1.PixelFormat.IsRgb)
                {
                    gmBitmap2.ColorProfile = ColorProfile.FromSrgb();
                    gmBitmap2.ColorManagement.DestinationProfile = gmBitmap1.ColorProfile;
                    gmBitmap2.ColorManagement.Convert(gmBitmap1.PixelFormat);
                }

                // Copy color profile
                gmBitmap2.ColorProfile = gmBitmap1.ColorProfile;

                using (var writer = new JpegWriter("ProcessNonRgb.jpg"))
                {
                    // Copy metadata
                    writer.Exif = reader.Exif;
                    writer.Iptc = reader.Iptc;
                    writer.Xmp = reader.Xmp;
                    writer.AdobeResources = reader.AdobeResources;

                    Pipeline.Run(gmBitmap2 + writer);
                }
            }
        }
    }
    finally
    {
        if (rgbGmBitmap != null)
        {
            rgbGmBitmap.Dispose();
        }
    }
}

Input

Output

For AI-assisted development: Download Graphics Mill Code Samples XML Catalog