//
// 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;
using System.Linq;
namespace DsPdfWeb.Demos
{
// This demo shows how to remove some instances (locations) of an image
// from a PDF using the GcPdfDocument.RemoveImages() method.
public class RemoveImageLocation
{
public int CreatePDF(Stream stream)
{
using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "ImageTransparency.pdf"));
var doc = new GcPdfDocument();
doc.Load(fs);
// Get the list of images in the document:
var imageInfos = doc.GetImages();
// For each image with multiple locations, remove the leftmost location:
foreach (var ii in imageInfos)
{
if (ii.Locations.Count > 1)
{
int iLeft = -1;
for (int i = 0; i < ii.Locations.Count; i++)
{
if (iLeft == -1 || ii.Locations[i].PageBounds.ToRect().Left < ii.Locations[iLeft].PageBounds.ToRect().Left)
iLeft = i;
}
// Remove the locations we want to keep:
for (int i = ii.Locations.Count - 1; i >= 0; i--)
if (i != iLeft)
ii.Locations.RemoveAt(i);
// Remove the locations that are left:
doc.RemoveImages([ii]);
}
}
// Done:
doc.Save(stream);
return doc.Pages.Count;
}
}
}