ByteScout PDF SDK – C# – Drawing – Transparency

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ByteScout PDF SDK – C# – Drawing – Transparency

Program.cs

using System.Diagnostics;
using Bytescout.PDF;

namespace Transparency
{
	/// <summary>
	/// This example demonstrates how to draw transparent objects.
	/// </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;

			// Prepare pens and brushes
			Pen borderPen = new SolidPen(new ColorRGB(0, 0, 0), 2f);
			
			SolidBrush brush1 = new SolidBrush(new ColorRGB(255, 0, 0));
			SolidBrush brush2 = new SolidBrush(new ColorRGB(0, 0, 255));
			
			borderPen.Opacity = 50;
			brush1.Opacity = 30;
			brush2.Opacity = 60;

			// Draw normal rectangles
			canvas.DrawRectangle(brush1, 100, 100, 100, 100);
			canvas.DrawRectangle(borderPen, brush2, 150, 150, 100, 100);

			borderPen.Opacity = 80;
			brush1.Opacity = 60;
			brush2.Opacity = 30;

			// Draw rounded rectangles
			canvas.DrawRoundedRectangle(brush1, 220, 100, 100, 100, 10);
			canvas.DrawRoundedRectangle(borderPen, brush2, 270, 150, 100, 100, 10);
			
			// Save document to file
			pdfDocument.Save("result.pdf");

			// Cleanup 
			pdfDocument.Dispose();

			// Open document in default PDF viewer app
			Process.Start("result.pdf");
		}
	}
}


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