//// 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 GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Annotations;
namespace DsPdfWeb.Demos{    // This sample demonstrates the use of RedactOptions.CopyImagesOnRedact property.    // By default, if all or part of an image falls within a redact area, and the image    // appears elsewhere in the PDF, all locations are affected, i.e. the image will look    // redacted throughout the document.    // The RedactOptions.CopyImagesOnRedact property allows you to change this behavior.    // If that property is true (it is false by default), the image is copied prior to    // applying the redact, and only the copy under the redacted area is affected by the    // redact.    // This sample loads a two page PDF with the same image appearing three times    // on the first, and three times on the second page.    // Two redact annotations are then added to the document, both cover different parts    // of the first image location on the first page.    // The first redact uses red overlay fill color, and (by default) affects the image    // in all locations, note the red rectangle in the top left part of the image    // in all locations throughout the document.    // The second redact uses blue overlay, and sets CopyImagesOnRedact to true, so    // that only the instance of the image under the actual redact area is affected,    // note the blue rectangle in the lower right part of the first image only.    // The PDF used by this sample was generated by ImageTransparency.    public class RedactCopyImages    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            // Load a PDF that contains the same image in several locations:            using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "ImageTransparency.pdf"));            doc.Load(fs);            // Duplicate the first page:            doc.Pages.ClonePage(0, 1);
            // This redact will affect all image locations:            var redact0 = new RedactAnnotation()            {                Page = doc.Pages[0],                Rect = new RectangleF(50, 50, 50, 50),                OverlayFillColor = Color.Red,            };            // This redact will affect only the image at the actual redact location:            var redact1 = new RedactAnnotation()            {                Page = doc.Pages[0],                Rect = new RectangleF(120, 120, 50, 50),                OverlayFillColor = Color.Blue,            };
            // Apply redact0 with default options:            doc.Redact(redact0);            // Apply redact1 with CopyImagesOnRedact on:            doc.Redact(redact1, new RedactOptions() { CopyImagesOnRedact = true });
            // Save the PDF:            doc.Save(stream);            return doc.Pages.Count;        }    }}