/*
 * This code is free software. It may only be copied or modified
 * if you include the following copyright notice:
 *
 * --> Copyright 2001 by Bruno Lowagie <--
 * --> Copyright 2004 by Kazuya Ujihara <--
 *
 * This code is example code of 'iText .NET'.
 * See http://www.ujihara.jp/iTextdotNET/examples.html
 *
 * This code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

using System; 
using com.lowagie.text;
using com.lowagie.text.pdf;
using System.IO;

public class Chap0112 
{
	public static void Main(string[] args) 
	{
		Console.WriteLine("Chapter 1 example 12: reading an existing PDF file");
    
		// we create a reader for a certain document
		PdfReader reader = new PdfReader("Chap0703.pdf");
		// we retrieve the total number of pages
		int n = reader.getNumberOfPages();
		// we retrieve the size of the first page
		Rectangle psize = reader.getPageSize(1);
		float width = psize.width();
		float height = psize.height();
    
		// step 1: creation of a document-object
		Document document = new Document(psize, 50, 50, 50, 50);
		// step 2: we create a writer that listens to the document
		PdfWriter writer = PdfWriter.getInstance(document, new FileStream("Chap0112.pdf", FileMode.Create));
		// step 3: we open the document
		try 
		{
			Watermark watermark = new Watermark(Image.getInstance("watermark.jpg"), 200, 320);
			document.add(watermark);
		}
		catch(Exception e) 
		{
			Console.WriteLine("Are you sure you have the file 'watermark.jpg' in the right path?");
		}
		document.open();
		// step 4: we add content
		PdfContentByte cb = writer.getDirectContent();
		int i = 0;
		int p = 0;
		Console.WriteLine("There are " + n + " pages in the document.");
		while (i < n) 
		{
			document.newPage();
			p++;
			i++;
			PdfImportedPage page1 = writer.getImportedPage(reader, i);
			cb.addTemplate(page1, .5f, 0, 0, .5f, 0, height / 2);
			Console.WriteLine("processed page " + i);
			if (i < n) 
			{
				i++;
				PdfImportedPage page2 = writer.getImportedPage(reader, i);
				cb.addTemplate(page2, .5f, 0, 0, .5f, width / 2, height / 2);
				Console.WriteLine("processed page " + i);
			}
			if (i < n) 
			{
				i++;
				PdfImportedPage page3 = writer.getImportedPage(reader, i);
				cb.addTemplate(page3, .5f, 0, 0, .5f, 0, 0);
				Console.WriteLine("processed page " + i);
			}
			if (i < n) 
			{
				i++;
				PdfImportedPage page4 = writer.getImportedPage(reader, i);
				cb.addTemplate(page4, .5f, 0, 0, .5f, width / 2, 0);
				Console.WriteLine("processed page " + i);
			}
			cb.setRGBColorStroke(255, 0, 0);
			cb.moveTo(0, height / 2);
			cb.lineTo(width, height / 2);
			cb.stroke();
			cb.moveTo(width / 2, height);
			cb.lineTo(width / 2, 0);
			cb.stroke();
			BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
			cb.beginText();
			cb.setFontAndSize(bf, 14);
			cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "page " + p + " of " + ((n / 4) + (n % 4 > 0? 1 : 0)), width / 2, 40, 0);
			cb.endText();
		}
		// step 5: we close the document
		document.close();
	}
}