// 完毕:
using System;
using System.IO;
using System.Drawing;
using System.Text;
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
{
// This sample shows how to add output intents to a PDF.
// It adds several versions of the ICC Probe Profile
// which deliberately distorts the rendered colors, so that it is easy
// to make sure that a profile is actually being used. To see the effect
// in this PDF, you may open it in Adobe Acrobat Reader DC, and set the
// Edit | Preferences | Page Display | Show Overprint Preview option to 'Always'.
// Then the deliberate color distortion added by the Probe Profile will be obvious.
// For details please see the "Output Intents" section of the PDF Specification.
public class OutputIntents
{
public int CreatePDF(Stream stream)
{
// The different versions of the ICC Probe profile:
var profiles = new (string, string)[] {
("Probev2_ICCv4.icc", @"https://www.color.org/probeprofile.xalter"),
("Probev1_ICCv4.icc", @"https://www.color.org/probeprofile.xalter"),
("Probev1_ICCv2.icc", @"https://www.color.org/probeprofile.xalter"),
};
//
var doc = new GcPdfDocument();
var page = doc.NewPage();
var g = page.Graphics;
var sb = new StringBuilder();
const string bullet = "\x2022\x2003";
sb.AppendLine("This document contains the following output intents (first one is the default):");
int i = 0;
foreach (var profile in profiles)
{
sb.AppendLine($"{bullet}{profile.Item1}, source: {profile.Item2}");
using (FileStream fs = File.OpenRead(Path.Combine("Resources", "Misc", profile.Item1)))
{
var oi = OutputIntent.Create($"Output intent testing {i++}", "", "http://www.color.org", profile.Item1, fs);
doc.OutputIntents.Add(oi);
}
}
sb.AppendLine(
"Colors processed via the ICC Probe Profile are deliberately distorted, " +
"so that it is easy to visually confirm that a profile is being used. " +
"To see the effect in this PDF, you may open it in Adobe Acrobat Reader DC and make sure that " +
"Edit | Preferences | Page Display | Show Overprint Preview is set to 'Always', " +
"then the deliberate color distortion will be obvious.");
var rc = Common.Util.AddNote(sb.ToString(), page);
g.DrawImage(GCDRAW.Image.FromFile(Path.Combine("Resources", "Images", "roofs.jpg")),
new RectangleF(rc.Left, rc.Bottom + 24, rc.Width, rc.Width), null, ImageAlign.StretchImage);
//
doc.Save(stream);
return doc.Pages.Count;
}
}
}