using System;
using System.IO;

using iTextSharp.text;
using iTextSharp.text.pdf;

public class Chap0613 {
	public static void Main() {
		Console.WriteLine("Chapter 6 example 13: masked images");
        
		Document document = new Document(PageSize.A4, 50, 50, 50, 50);
		try {
			PdfWriter writer = PdfWriter.getInstance(document, new FileStream("Chap0613.pdf", FileMode.Create));
            
			document.Open();
			Paragraph p = new Paragraph("Some text behind a masked image.");
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
            
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			document.Add(p);
			PdfContentByte cb = writer.DirectContent;
			byte[] maskr = {(byte)0x3c, (byte)0x7e, (byte)0xe7, (byte)0xc3, (byte)0xc3, (byte)0xe7, (byte)0x7e, (byte)0x3c};
			Image mask = Image.getInstance(8, 8, 1, 1, maskr);
			mask.makeMask();
			mask.InvertMask = true;
			Image image = Image.getInstance("vonnegut.gif");
			image.ImageMask = mask;
			image.setAbsolutePosition(60, 620);
			// explicit masking
			cb.addImage(image);
			// stencil masking
			cb.setRGBColorFill(255, 0, 0);
			cb.addImage(mask, mask.ScaledWidth * 8, 0, 0, mask.ScaledHeight * 8, 100, 400);
			cb.setRGBColorFill(0, 255, 0);
			cb.addImage(mask, mask.ScaledWidth * 8, 0, 0, mask.ScaledHeight * 8, 200, 400);
			cb.setRGBColorFill(0, 0, 255);
			cb.addImage(mask, mask.ScaledWidth * 8, 0, 0, mask.ScaledHeight * 8, 300, 400);
			document.Close();
		}
		catch (Exception de) {
			Console.Error.WriteLine(de.StackTrace);
		}
	}
}