//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//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;        }    }}