blob: 3993ddb40967b0080e79d561fd5e062d0af0a7a8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
// --------------------------------------------------------------------------------------------------------------------
// <copyright file="GrayscaleImage.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// Extend the Image Class to support a grayscale mode.
// Usage: local:AutoGreyableImage Source="Image.png"
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.Helpers
{
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;
/// <summary>
/// Extend the Image Class to support a grayscale mode.
/// </summary>
public class GrayscaleImage : Image
{
/// <summary>
/// Initializes static members of the <see cref="GrayscaleImage"/> class.
/// Usage: local:AutoGreyableImage Source="Image.png"
/// </summary>
static GrayscaleImage()
{
// Override the metadata of the IsEnabled property.
IsEnabledProperty.OverrideMetadata(typeof(GrayscaleImage), new FrameworkPropertyMetadata(true, IsEnabledPropertyChanged));
}
/// <summary>
/// The is enabled property changed.
/// When this changes, grayscale the image when false, leave with colour when true.
/// </summary>
/// <param name="source">
/// The source.
/// </param>
/// <param name="args">
/// The args.
/// </param>
private static void IsEnabledPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs args)
{
var sourceImage = source as GrayscaleImage;
if (sourceImage != null)
{
if (!Convert.ToBoolean(args.NewValue))
{
var bitmapImage = new BitmapImage(new Uri(sourceImage.Source.ToString()));
sourceImage.Source = new FormatConvertedBitmap(bitmapImage, PixelFormats.Gray32Float, null, 0);
sourceImage.OpacityMask = new ImageBrush(bitmapImage);
}
else
{
sourceImage.Source = ((FormatConvertedBitmap)sourceImage.Source).Source;
sourceImage.OpacityMask = null;
}
}
}
}
}
|
