Insert an image into a PDF in C#

//
// Copyright (c) 2001-2021 by PDFTron Systems Inc. All Rights Reserved.
//

using System;
using pdftron;
using pdftron.Common;
using pdftron.Filters;
using pdftron.SDF;
using pdftron.PDF;

namespace AddImageTestCS
{
	class Class1
	{
		private static pdftron.PDFNetLoader pdfNetLoader = pdftron.PDFNetLoader.Instance();
		static Class1() {}

		/// <summary>
		//-----------------------------------------------------------------------------------
		// This sample illustrates how to embed various raster image formats 
		// (e.g. TIFF, JPEG, JPEG2000, JBIG2, GIF, PNG, BMP, etc.) in a PDF document.
		//-----------------------------------------------------------------------------------
		/// </summary>
		static void Main(string[] args)
		{
			PDFNet.Initialize(PDFTronLicense.Key);

			// Relative path to the folder containing test files.
			string input_path =  "../../TestFiles/";
			string output_path = "../../TestFiles/Output/";

			try
			{
				using (PDFDoc doc = new PDFDoc())
				using (ElementBuilder bld = new ElementBuilder())	// Used to build new Element objects
				using (ElementWriter writer = new ElementWriter())	// Used to write Elements to the page	
				{
					Page page = doc.PageCreate();	// Start a new page 
					writer.Begin(page);				// Begin writing to this page

					// ----------------------------------------------------------
					// Embed a JPEG image to the output document. 
					Image img = Image.Create(doc, input_path + "peppers.jpg");

					// You can also directly add any .NET Bitmap. The following commented-out code 
					// is equivalent to the above line:
					//	System.Drawing.Bitmap bmp;
					//	System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(input_path + "peppers.jpg");
					//	Image img = Image.Create(doc, bmp);

					Element element = bld.CreateImage(img, 50, 500, img.GetImageWidth() / 2, img.GetImageHeight() / 2);
					writer.WritePlacedElement(element);

					// ----------------------------------------------------------
					// Add a PNG image to the output file
					img = Image.Create(doc, input_path + "butterfly.png");
					element = bld.CreateImage(img, new Matrix2D(100, 0, 0, 100, 300, 500));
					writer.WritePlacedElement(element);
			
					// ----------------------------------------------------------
					// Add a GIF image to the output file
					img = Image.Create(doc, input_path + "pdfnet.gif");
					element = bld.CreateImage(img, new Matrix2D(img.GetImageWidth(), 0, 0, img.GetImageHeight(), 50, 350));
					writer.WritePlacedElement(element);
			
					// ----------------------------------------------------------
					// Add a TIFF image to the output file
					img = Image.Create(doc, input_path + "grayscale.tif");
					element = bld.CreateImage(img, new Matrix2D(img.GetImageWidth(), 0, 0, img.GetImageHeight(), 10, 50));
					writer.WritePlacedElement(element);

					writer.End();		   // Save the page
					doc.PagePushBack(page); // Add the page to the document page sequence

					// ----------------------------------------------------------
					// Add a BMP image to the output file
					/*
					bmp = new System.Drawing.Bitmap(input_path + "pdftron.bmp");
					img = Image.Create(doc, bmp);
					element = bld.CreateImage(img, new Matrix2D(bmp.Width, 0, 0, bmp.Height, 255, 700));
					writer.WritePlacedElement(element);
			
					writer.End();	// Finish writing to the page
					doc.PagePushBack(page);
					*/

					// ----------------------------------------------------------
					// Embed a monochrome TIFF. Compress the image using lossy JBIG2 filter.

					page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 612, 794));
					writer.Begin(page); // begin writing to this page

					// Note: encoder hints can be used to select between different compression methods. 
					// For example to instruct PDFNet to compress a monochrome image using JBIG2 compression.
					ObjSet hint_set = new ObjSet();
					Obj enc = hint_set.CreateArray();  // Initialize encoder 'hint' parameter 
					enc.PushBackName("JBIG2");
					enc.PushBackName("Lossy");

					img = pdftron.PDF.Image.Create(doc, input_path + "multipage.tif", enc);
					element = bld.CreateImage(img, new Matrix2D(612, 0, 0, 794, 0, 0));
					writer.WritePlacedElement(element);

					writer.End();		   // Save the page
					doc.PagePushBack(page); // Add the page to the document page sequence

					// ----------------------------------------------------------
					// Add a JPEG2000 (JP2) image to the output file

					// Create a new page 
					page = doc.PageCreate();
					writer.Begin(page); // Begin writing to the page

					// Embed the image.
					img = pdftron.PDF.Image.Create(doc, input_path + "palm.jp2");

					// Position the image on the page.
					element = bld.CreateImage(img, new Matrix2D(img.GetImageWidth(), 0, 0, img.GetImageHeight(), 96, 80));
					writer.WritePlacedElement(element);

					// Write 'JPEG2000 Sample' text string under the image.
					writer.WriteElement(bld.CreateTextBegin(pdftron.PDF.Font.Create(doc, pdftron.PDF.Font.StandardType1Font.e_times_roman), 32));
					element = bld.CreateTextRun("JPEG2000 Sample");
					element.SetTextMatrix(1, 0, 0, 1, 190, 30);
					writer.WriteElement(element);
					writer.WriteElement(bld.CreateTextEnd());

					writer.End();   // Finish writing to the page
					doc.PagePushBack(page);


					doc.Save(output_path + "addimage.pdf", SDFDoc.SaveOptions.e_linearized);
					PDFNet.Terminate();
					Console.WriteLine("Done. Result saved in addimage.pdf...");
				}
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

		}
	}
}