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Save Spot Image To PDF

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DrawingPDFSpot Color

Saves an image with a spot color to PDF.

Code Snippet

using (var spotImage = new Bitmap(300, 300, PixelFormat.Format8bppSpot, RgbColor.White))
{
    spotImage.Ink = new Ink("PANTONE Red 032 C", new RgbColor(243, 40, 55));

    using (var gr = spotImage.GetGraphics())
    {
        var brush = new RadialGradientBrush();
        brush.ColorStops = new ColorStop[]
        {
            new ColorStop() { Color = RgbColor.White, Position = 0.0f },
            new ColorStop() { Color = RgbColor.Black, Position = 1.0f },
        };
        brush.StartPoint = new System.Drawing.PointF(gr.Width / 2, gr.Height / 2);
        brush.EndPoint = brush.StartPoint;

        brush.StartRadius = 0;
        brush.EndRadius = 300;

        gr.FillRectangle(brush, 0, 0, gr.Width, gr.Height);
    }

    using (var pdfWriter = new PdfWriter("SpotImage.pdf"))
    {
        Pipeline.Run(spotImage + pdfWriter);

        pdfWriter.Close();
    }
}

Output

SpotImage.pdf

Download

SpotImage.png

SpotImage.png

Used APIs