This sample shows how to customize a way in which semi-transparent objects will blend on a canvas.
C# :
using PDFMosaic;
using System.Drawing;
namespace BlendMode
{
class BlendMode
{
static void Main()
{
PDFDocument document = new PDFDocument();
document.Pages.Add(new PDFPage(PDFPaperFormat.A4));
PDFCanvas canvas = document.Pages[0].Canvas;
PDFDeviceColor red = new PDFColorRGB(255, 0, 0);
PDFDeviceColor green = new PDFColorRGB(0, 255, 0);
PDFDeviceColor blue = new PDFColorRGB(0, 0, 255);
PDFSolidBrush brushRed = new PDFSolidBrush(red);
PDFSolidBrush brushGreen = new PDFSolidBrush(green);
PDFSolidBrush brushBlue = new PDFSolidBrush(blue);
PDFSolidPen pen = new PDFSolidPen();
canvas.DrawCircle(brushRed, 300, 300, 50);
canvas.DrawCircle(brushGreen, 300, 350, 50);
canvas.DrawCircle(brushBlue, 350, 300, 50);
canvas.BlendMode = PDFBlendMode.Screen;
canvas.DrawCircle(brushRed, 100, 100, 50);
canvas.DrawCircle(brushGreen, 100, 150, 50);
canvas.DrawCircle(brushBlue, 150, 100, 50);
canvas.BlendMode = PDFBlendMode.Darken;
canvas.DrawCircle(brushRed, 300, 100, 50);
canvas.DrawCircle(brushGreen, 300, 150, 50);
canvas.DrawCircle(brushBlue, 350, 100, 50);
canvas.BlendMode = PDFBlendMode.Hue;
canvas.DrawCircle(brushRed, 100, 300, 50);
canvas.DrawCircle(brushGreen, 100, 350, 50);
canvas.DrawCircle(brushBlue, 150, 300, 50);
document.Save("BlendMode.pdf", true);
}
}
}
VB.NET :
Imports PDFMosaic
Imports System.Drawing
Module BlendMode
Sub Main()
Dim document As PDFDocument = New PDFDocument()
document.Pages.Add(New PDFPage(PDFPaperFormat.A4))
Dim canvas As PDFCanvas = document.Pages(0).Canvas
Dim red As PDFDeviceColor = New PDFColorRGB(255, 0, 0)
Dim green As PDFDeviceColor = New PDFColorRGB(0, 255, 0)
Dim blue As PDFDeviceColor = New PDFColorRGB(0, 0, 255)
Dim brushRed As PDFSolidBrush = New PDFSolidBrush(red)
Dim brushGreen As PDFSolidBrush = New PDFSolidBrush(green)
Dim brushBlue As PDFSolidBrush = New PDFSolidBrush(blue)
Dim pen As PDFSolidPen = New PDFSolidPen()
canvas.DrawCircle(brushRed, 300, 300, 50)
canvas.DrawCircle(brushGreen, 300, 350, 50)
canvas.DrawCircle(brushBlue, 350, 300, 50)
canvas.BlendMode = PDFBlendMode.Screen
canvas.DrawCircle(brushRed, 100, 100, 50)
canvas.DrawCircle(brushGreen, 100, 150, 50)
canvas.DrawCircle(brushBlue, 150, 100, 50)
canvas.BlendMode = PDFBlendMode.Darken
canvas.DrawCircle(brushRed, 300, 100, 50)
canvas.DrawCircle(brushGreen, 300, 150, 50)
canvas.DrawCircle(brushBlue, 350, 100, 50)
canvas.BlendMode = PDFBlendMode.Hue
canvas.DrawCircle(brushRed, 100, 300, 50)
canvas.DrawCircle(brushGreen, 100, 350, 50)
canvas.DrawCircle(brushBlue, 150, 300, 50)
document.Save("BlendMode.pdf", True)
End Sub
End Module