How To Create Gray Color Space in PDF and Draw Graphics Elements using PDF .NET Mosaic

This sample shows how to create gray color space and then create and use a color with that color space.

Gray color space

C# :

using PDFMosaic;
using System.Drawing;
using System;

namespace GrayColorSpace
{
class GrayColorSpace
{
static void Main()
{
PDFDocument document = new PDFDocument();
document.Pages.Add(new PDFPage(PDFPaperFormat.A4));
PDFCanvas canvas = document.Pages[0].Canvas;

Random rnd = new Random();

for(int i = 0; i < 5; ++i)
{
PDFColorGray colorGray = new PDFColorGray((byte)rnd.Next(255));
PDFSolidBrush brushGray = new PDFSolidBrush(colorGray);

canvas.DrawEllipse(brushGray, 10 + 20*i, 10 + 20*i, 70, 100);
}

document.Save(“GrayColorSpace.pdf”, true);
}
}
}

VB.NET :

Imports PDFMosaic
Imports System.Drawing
Imports System

Module ColorProfiles
Sub Main()
Dim document As PDFDocument = New PDFDocument()
document.Pages.Add(New PDFPage(PDFPaperFormat.A4))
Dim canvas As PDFCanvas = document.Pages(0).Canvas

Dim rnd As New Random()

Dim i As Integer
For i = 0 To 4
Dim colorGray As PDFColorGray = New PDFColorGray(rnd.Next(255))
Dim brushGray As PDFSolidBrush = New PDFSolidBrush(colorGray)

canvas.DrawEllipse(brushGray, 10 + i*20, 100 + i*20, 70, 100)
Next i

document.Save(“ColorProfiles.pdf”, True)
End Sub
End Module