ByteScout PDF SDK – C# – Set Blend Mode for Drawing in PDF

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ByteScout PDF SDK – C# – Set Blend Mode for Drawing in PDF

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ByteScout-PDF-SDK-C-sharp-Set-Blend-Mode-for-Drawing-in-PDF.pdf

How to set blend mode for drawing in PDF in C# using ByteScout PDF SDK

The tutorial below will demonstrate how to set blend mode for drawing in PDF in C#

Source code documentation samples provide quick and easy way to add a required functionality into your application. ByteScout PDF SDK can set blend mode for drawing in PDF. It can be used from C#. ByteScout PDF SDK is the component to help programmers in generating new pdf files, modifying and updating existing pdf documents or pdf forms. Provides support for auto-filling pdf forms, adding text with adjustable font, style, size, font family, new form fields, vector and raster drawings.

This code snippet below for ByteScout PDF SDK works best when you need to quickly set blend mode for drawing in PDF in your C# application. Just copy and paste the code into your C# application’s code and follow the instruction. Code testing will allow the function to be tested and work properly with your data.

Download free trial version of ByteScout PDF SDK from our website with this and other source code samples for C#.

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Program.cs

      using System.Diagnostics;
using Bytescout.PDF;

namespace BlendModeExample
{
    /// <summary>
    /// This example demonstrates how to use blend modes - a way how 
    /// intersecting semi-transparent objects will blend on page canvas.
    /// </summary>
    class Program
    {
        static void Main()
        {
            // Create new document
            Document pdfDocument = new Document();
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";
            // Add page
            Page page = new Page(PaperFormat.A4);
            pdfDocument.Pages.Add(page);

            Canvas canvas = page.Canvas;

            // Create transparent brushes
            SolidBrush brushRed = new SolidBrush(new ColorRGB(255, 0, 0));
            brushRed.Opacity = 50;
            SolidBrush brushGreen = new SolidBrush(new ColorRGB(0, 255, 0));
            brushGreen.Opacity = 50;
            SolidBrush brushBlue = new SolidBrush(new ColorRGB(0, 0, 255));
            brushBlue.Opacity = 50;

            // Normal blending
            canvas.BlendMode = BlendMode.Normal;
            canvas.DrawCircle(brushRed, 100, 100, 50);
            canvas.DrawCircle(brushGreen, 100, 150, 50);
            canvas.DrawCircle(brushBlue, 150, 100, 50);

            // Darken blending
            canvas.BlendMode = BlendMode.Darken;
            canvas.DrawCircle(brushRed, 300, 100, 50);
            canvas.DrawCircle(brushGreen, 300, 150, 50);
            canvas.DrawCircle(brushBlue, 350, 100, 50);

            // Lighten blending
            canvas.BlendMode = BlendMode.Lighten;
            canvas.DrawCircle(brushRed, 100, 300, 50);
            canvas.DrawCircle(brushGreen, 100, 350, 50);
            canvas.DrawCircle(brushBlue, 150, 300, 50);

            // Color burn blending
            canvas.BlendMode = BlendMode.ColorBurn;
            canvas.DrawCircle(brushRed, 300, 300, 50);
            canvas.DrawCircle(brushGreen, 300, 350, 50);
            canvas.DrawCircle(brushBlue, 350, 300, 50);

            // Save document to file
            pdfDocument.Save("result.pdf");

            // Cleanup 
            pdfDocument.Dispose();

            // Open result document in default associated application (for demo purpose)
            ProcessStartInfo processStartInfo = new ProcessStartInfo("result.pdf");
            processStartInfo.UseShellExecute = true;
            Process.Start(processStartInfo);
        }
    }
}