//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;using GrapeCity.Documents.Drawing;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos{    // Using image alignment options in DsPdf.    // (This example replaces the older RawImages example; the RawImage class is obsolete and should not be used.)    //    // NOTE: When you render an image in DsPdf multiple times (e.g. rendering    // the same image as part of a page header on all pages), it will automatically be    // added to a dictionary and reused throughout the document, provided you use    // the same image object on all pages. So rather than loading the same image from    // file (or stream) each time it is needed, it is always preferable to load the image    // once and cache it in an image object. This applies to all image types used in DsPdf.    public class ImageAlignment    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();
            // Text format used to draw captions:            var tf = new TextFormat() { Font = StandardFonts.Times, FontSize = 12 };
            // Action to draw the image with various alignment options:            void drawImage(GCDRAW.Image image_, Page page_, ImageAlign ia_, bool clip_)            {                var rect = new RectangleF(72, 72, 72 * 4, 72 * 4);                var clipped = clip_ ? "clipped to a 4\"x4\" rectangle" : "without clipping";                var align = ia_ == ImageAlign.Default ? "ImageAlign.Default" :                    ia_ == ImageAlign.CenterImage ? "ImageAlign.CenterImage" :                    ia_ == ImageAlign.StretchImage ? "ImageAlign.StretchImage" : "custom ImageAlign";                // Draw image caption:                page_.Graphics.DrawString($"Page {doc.Pages.IndexOf(page_) + 1}: Image drawn at (1\",1\"), {clipped}, using {align}:", tf, new PointF(72, 36));                var clip = clip_ ? new Nullable<RectangleF>(rect) : new Nullable<RectangleF>();                // Draw the image:                page_.Graphics.DrawImage(image_, rect, clip, ia_, out RectangleF[] imageRects);                // Show the image outline:                page_.Graphics.DrawRectangle(imageRects[0], Color.Red, 1, null);                // Show image/clip area:                page_.Graphics.DrawRectangle(rect, Color.Blue, 1, null);            }
            // Create images from JPEG files (using the same Image class instance to draw an image            // in a PDF ensures that the image data will be reused and not duplicated in the PDF):            using var image = GCDRAW.Image.FromFile(Path.Combine("Resources", "Images", "puffins.jpg"));            using var imageSmall = GCDRAW.Image.FromFile(Path.Combine("Resources", "ImagesBis", "puffins-small.jpg"));
            // The ImageAlign class provides various image alignment options.            // It also defines a few static instances with some commonly used            // combinations of options demonstrated below.
            // Page 1: draw image without clipping, with default alignment:            drawImage(image, doc.NewPage(), ImageAlign.Default, false);
            // Page 2: draw image with clipping, with default alignment:            drawImage(image, doc.NewPage(), ImageAlign.Default, true);
            // Page 3: draw image with clipping, with CenterImage alignment:            drawImage(image, doc.NewPage(), ImageAlign.CenterImage, true);
            // Page 4: draw image without clipping and stretched image:            drawImage(image, doc.NewPage(), ImageAlign.StretchImage, false);
            // Page 5: draw image without clipping, fit into the rectangle, preserving aspect ratio:            var ia = new ImageAlign(ImageAlignHorz.Center, ImageAlignVert.Center, true, true, true, false, false);            drawImage(image, doc.NewPage(), ia, false);
            // Page 6: draw a small image tiled, without clipping, fit into the rectangle, preserving aspect ratio:            ia = new ImageAlign(ImageAlignHorz.Left, ImageAlignVert.Top, false, false, true, true, true);            drawImage(imageSmall, doc.NewPage(), ia, false);
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}