Arbeiten mit Transparenz in XPS-Dateien | .NET

Legen Sie die Deckkraftmaske in XPS fest

Legen Sie das Deckkraftmaskenobjekt fest

Aspose.Page für .NET bietet die Eigenschaft OpacityMask, um die Deckkraftmaske auf dem XPS-Pfad festzulegen. Sie müssen XpsPathGeometry angeben und zu XpsPath hinzufügen. Ein Bild kann als Deckkraftmaske verwendet werden und die Alpha-Komponente jedes Pixels wird zum Auftragen auf die darunter liegende Füllung verwendet. Das generierte XPS-Dokument zeigt schräge Verlaufsstreifen als Geschenk über der Quellbilddatei. Der folgende Codeausschnitt zeigt die vollständige Funktionalität zum Festlegen der Deckkraftmaske:

 1// For complete examples and data files, please go to https://github.com/aspose-page/Aspose.Page-for-.NET
 2// The path to the documents directory.
 3string dataDir = RunExamples.GetDataDir_WorkingWithTransparency();
 4// Create new XPS Document
 5XpsDocument doc = new XpsDocument();
 6//Add Canvas to XpsDocument instance
 7XpsCanvas canvas = doc.AddCanvas();
 8// Rectangle with opacity masked by ImageBrush
 9XpsPath path = canvas.AddPath(doc.CreatePathGeometry("M 10,180 L 228,180 228,285 10,285"));
10path.Fill = doc.CreateSolidColorBrush(doc.CreateColor(1.0f, 0.0f, 0.0f));
11path.OpacityMask = doc.CreateImageBrush(dataDir + "R08SY_NN.tif", new RectangleF(0f, 0f, 128f, 192f),
12    new RectangleF(0f, 0f, 64f, 96f));
13((XpsImageBrush)path.OpacityMask).TileMode = XpsTileMode.Tile;
14// Save resultant XPS document
15doc.Save(dataDir + "OpacityMask_out.xps");

Weitere Informationen finden Sie unter „Arbeiten mit Transparenz in XPS-Dokumenten“ in Java und C++.


Das Ergebnis

Deckkraftmaske

Fügen Sie ein transparentes Objekt im XPS-Dokument hinzu

Transparentes Objekt hinzufügen

Die Lösung bietet die Klasse XpsPath, mit der Sie transparente Objekte zu einem XPS-Dokument hinzufügen können. Sie müssen XpsPathGeometry angeben und zu XpsPath hinzufügen. Der folgende Codeausschnitt zeigt die vollständige Funktionalität zum Hinzufügen transparenter Objekte zum XPS-Dokument:

 1// For complete examples and data files, please go to https://github.com/aspose-page/Aspose.Page-for-.NET
 2// The path to the documents directory.
 3string dataDir = RunExamples.GetDataDir_WorkingWithTransparency();
 4// Create new XPS Document
 5XpsDocument doc = new XpsDocument();
 6
 7// Just to demonstrate transparency
 8doc.AddPath(doc.CreatePathGeometry("M120,0 H400 v1000 H120")).Fill = doc.CreateSolidColorBrush(Color.Gray);
 9doc.AddPath(doc.CreatePathGeometry("M300,120 h600 V420 h-600")).Fill = doc.CreateSolidColorBrush(Color.Gray);
10
11// Create path with closed rectangle geometry
12XpsPath path1 = doc.CreatePath(doc.CreatePathGeometry("M20,20 h200 v200 h-200 z"));
13// Set blue solid brush to fill path1
14path1.Fill = doc.CreateSolidColorBrush(Color.Blue);
15// Add it to the current page
16XpsPath path2 = doc.Add(path1);
17
18// path1 and path2 are the same as soon as path1 hasn't been placed inside any other element
19// (which means that path1 had no parent element).
20// Because of that rectangle's color on the page effectively turns to green
21path2.Fill = doc.CreateSolidColorBrush(Color.Green);
22
23// Now add path2 once again. Now path2 has parent. So path3 won't be the same as path2.
24// Thus a new rectangle is painted on the page ...
25XpsPath path3 = doc.Add(path2);
26// ... and we shift it 300 units lower ...
27path3.RenderTransform = doc.CreateMatrix(1, 0, 0, 1, 0, 300);
28// ... and set red solid brush to fill it
29path3.Fill = doc.CreateSolidColorBrush(Color.Red);
30
31// Create new path4 with path2's geometry ...
32XpsPath path4 = doc.AddPath(path2.Data);
33// ... shift it 300 units to the right ...
34path4.RenderTransform = doc.CreateMatrix(1, 0, 0, 1, 300, 0);
35// ... and set blue solid fill
36path4.Fill = doc.CreateSolidColorBrush(Color.Blue);
37
38// Add path4 once again.
39XpsPath path5 = doc.Add(path4);
40// path4 and path5 are not the same again ...
41// (move path5 300 units lower)
42path5.RenderTransform = path5.RenderTransform.Clone(); // to disconnect RenderTransform value from path4 (see next comment about Fill property)
43path5.RenderTransform.Translate(0, 300);
44// ... but if we set the opacity of Fill property, it will take effect on both path5 and path4
45// because brush is a complex property value which remains the same for path5 and path4
46path5.Fill.Opacity = 0.8f;
47
48// Create new path6 with path2's geometry ...
49XpsPath path6 = doc.AddPath(path2.Data);
50// ... shift it 600 units to the right ...
51path6.RenderTransform = doc.CreateMatrix(1, 0, 0, 1, 600, 0);
52// ... and set yellow solid fill
53path6.Fill = doc.CreateSolidColorBrush(Color.Yellow);
54
55// Now add path6's clone ...
56XpsPath path7 = doc.Add(path6.Clone());
57// (move path5 300 units lower)
58path7.RenderTransform = path7.RenderTransform.Clone();
59path7.RenderTransform.Translate(0, 300);
60// ... and set opacity for path7
61path7.Fill.Opacity = 0.8f;
62// Now opacity effects independantly as soon as property values are cloned along with the element
63
64// The following code block is equivalent to the previous one.
65// Add path6 itself. path6 and path7 are not the same. Although their Fill property values are the same 
66//XpsPath path7 = doc.Add(path6);
67//path7.RenderTransform = path7.RenderTransform.Clone();
68//path7.RenderTransform.Translate(0, 300);
69// To "disconnect" path7's Fill property from path6's Fill property reassign it to its clone (or path6's Fill clone)
70//path7.Fill = ((XpsSolidColorBrush)path7.Fill).Clone();
71//path7.Fill.Opacity = 0.8f;
72
73// Save resultant XPS document
74doc.Save(dataDir + "WorkingWithTransparency_out.xps");

Weitere Informationen finden Sie unter „Arbeiten mit Transparenz in XPS-Dokumenten“ in Java und C++.


Das Ergebnis

Mit Transparenz arbeiten

Sie können Beispiele und Datendateien herunterladen von GitHub.

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