// // This code is part of Document Solutions for PDF demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using System.Text; using GrapeCity.Documents.Pdf; using GrapeCity.Documents.Text; using GrapeCity.Documents.Drawing; namespace DsPdfWeb.Demos { // This sample loads a PDF (we use the document generated by the Wetlands sample) // and extracts all images from it. It then prints those images into a new PDF, // centered one per page. public class GetImages { public int CreatePDF(Stream stream) { // Load an existing PDF with some images: var docSrc = new GcPdfDocument(); using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "Wetlands.pdf")); docSrc.Load(fs); // This call extracts information about images from the loaded PDF, // note that for large files it may take a while to complete: var imageInfos = docSrc.GetImages(); var doc = new GcPdfDocument(); var textPt = new PointF(72, 72); var imageRc = new RectangleF(72, 72 * 2, doc.PageSize.Width - 72 * 2, doc.PageSize.Height - 72 * 3); var tf = new TextFormat() { Font = StandardFonts.Times, FontSize = 12 }; foreach (var imageInfo in imageInfos) { // The same image may appear on multiple locations, // imageInfo includes page indices and locations on pages; // for simplicity sake we only print page numbers here: var sb = new StringBuilder(); imageInfo.Locations.ForEach(il_ => sb.Append((il_.Page.Index + 1).ToString() + ", ")); var g = doc.NewPage().Graphics; g.DrawString($"This image appears on page(s) {sb.ToString().TrimEnd(' ', ',')} of the original PDF:", tf, new PointF(72, 72)); g.DrawImage(imageInfo.Image, imageRc, null, ImageAlign.ScaleImage); } // Done: doc.Save(stream); return doc.Pages.Count; } } }