DrawingGroup.BitmapEffect プロパティ

定義

この DrawingGroup に適用する BitmapEffect を取得または設定します。Gets or sets the BitmapEffect to apply to this DrawingGroup.

public:
 property System::Windows::Media::Effects::BitmapEffect ^ BitmapEffect { System::Windows::Media::Effects::BitmapEffect ^ get(); void set(System::Windows::Media::Effects::BitmapEffect ^ value); };
public System.Windows.Media.Effects.BitmapEffect BitmapEffect { get; set; }
member this.BitmapEffect : System.Windows.Media.Effects.BitmapEffect with get, set
Public Property BitmapEffect As BitmapEffect

プロパティ値

この DrawingGroup に適用する BitmapEffectThe BitmapEffect to apply to this DrawingGroup. 既定値は、null です。The default is null.

この例では、をBitmapEffect描画に適用する方法を示します。This example shows how to apply a BitmapEffect to a drawing. を使用BitmapEffectすると、描画されたコンテンツに他の視覚効果を適用したり、ぼかしたりすることができます。Use a BitmapEffect to blur or emboss, or to apply other visual effects to rendered content.

ビットマップDrawingGroup効果をサポートしているのはオブジェクトだけです。Only DrawingGroup objects support bitmap effects. ビットマップ効果をDrawing別の種類のオブジェクトに適用するにはDrawingGroup 、それをに追加BitmapEffectし、 DrawingGroupオブジェクトのプロパティを設定します。To apply a bitmap effect to another type of Drawing object, add it to a DrawingGroup and set the BitmapEffect property of the DrawingGroup object.

注意

Windows Presentation Foundation のビットマップ効果は、レンダリングされたソフトウェアです。Windows Presentation Foundation bitmap effects are software rendered. BitmapEffect適用するオブジェクトは、ソフトウェアでもレンダリングされます。Any object that applies a BitmapEffect is also rendered in the software. このシナリオでBitmapEffectはシステムパフォーマンスが低下する可能性があるため、大きなビジュアルやアニメーションでを使用することは避けてください。Avoid using a BitmapEffect in large visuals or animations because this scenario can cause a decrease in system performance.

次の例ではDrawingGroup 、を使用BlurBitmapEffectしてGeometryDrawing 、を複数のオブジェクトに適用します。The following example uses a DrawingGroup to apply a BlurBitmapEffect to several GeometryDrawing objects.

次の図は、この例の出力を示しています。The following illustration shows the output from this example.

BlurBitmapEffect を持つ図面グループDrawingGroup with a BlurBitmapEffect

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Media.Effects;

namespace SDKSample 
{

    /// <summary>
    /// This example creates two DrawingGroup objects,
    /// one with a bitmap effect and one without.
    /// </summary>
    public class BitmapEffectExample : Page
    {
        public BitmapEffectExample()
        {

            //
            // Create a DrawingGroup
            // that has no BitmapEffect
            //
            PathFigure pLineFigure = new PathFigure();
            pLineFigure.StartPoint = new Point(25, 25);
            PolyLineSegment pLineSegment = new PolyLineSegment();
            pLineSegment.Points.Add(new Point(0,50));
            pLineSegment.Points.Add(new Point(25, 75));
            pLineSegment.Points.Add(new Point(50, 50));
            pLineSegment.Points.Add(new Point(25, 25));
            pLineSegment.Points.Add(new Point(25, 0));
            pLineFigure.Segments.Add(pLineSegment);
            PathGeometry pGeometry = new PathGeometry();
            pGeometry.Figures.Add(pLineFigure);
          
            GeometryDrawing drawing1 = new GeometryDrawing(
                    Brushes.Lime, 
                    new Pen(Brushes.Black, 10),
                    pGeometry
                );

            GeometryDrawing drawing2 = new GeometryDrawing(
                    Brushes.Lime,
                    new Pen(Brushes.Black, 2),
                    new EllipseGeometry(new Point(10,10), 5, 5)
                );
            
            // Create a DrawingGroup
            DrawingGroup drawingGroupWithoutBitmapEffect = new DrawingGroup();
            drawingGroupWithoutBitmapEffect.Children.Add(drawing1);
            drawingGroupWithoutBitmapEffect.Children.Add(drawing2);

            // Use an Image control and a DrawingImage to
            // display the drawing.
            DrawingImage drawingImage01 = new DrawingImage(drawingGroupWithoutBitmapEffect);
            
            // Freeze the DrawingImage for performance benefits.
            drawingImage01.Freeze();

            Image image01 = new Image();
            image01.Source = drawingImage01;
            image01.Stretch = Stretch.None;
            image01.HorizontalAlignment = HorizontalAlignment.Left;

            //
            // Create another DrawingGroup and apply 
            // a blur effect to it.
            //

            // Create a clone of the first DrawingGroup.
            DrawingGroup drawingGroupWithBitmapEffect = 
                drawingGroupWithoutBitmapEffect.Clone();

            // Create a blur effect.
            BlurBitmapEffect blurEffect = new BlurBitmapEffect();
            blurEffect.Radius = 3.0;

            // Apply it to the drawing group.
            drawingGroupWithBitmapEffect.BitmapEffect = blurEffect;

            // Use another Image control and DrawingImage
            // to display the drawing.
            DrawingImage drawingImage02 = new DrawingImage(drawingGroupWithBitmapEffect);
            
            // Freeze the DrawingImage for performance benefits.
            drawingImage02.Freeze();

            Image image02 = new Image();
            image02.Source = drawingImage02;
            image02.Stretch = Stretch.None;
            image02.HorizontalAlignment = HorizontalAlignment.Left;

            // Create borders around the images and add them to the
            // page.
            Border border01 = new Border();
            border01.BorderBrush = Brushes.Gray;
            border01.BorderThickness = new Thickness(1);
            border01.VerticalAlignment = VerticalAlignment.Top;
            border01.Margin = new Thickness(10);
            border01.Child = image01;

            Border border02 = new Border();
            border02.BorderBrush = Brushes.Gray;
            border02.BorderThickness = new Thickness(1);
            border02.VerticalAlignment = VerticalAlignment.Top;
            border02.Margin = new Thickness(50,10,10,10);
            border02.Child = image02;

            StackPanel mainPanel = new StackPanel();
            mainPanel.Orientation = Orientation.Horizontal;
            mainPanel.HorizontalAlignment = HorizontalAlignment.Left;
            mainPanel.VerticalAlignment = VerticalAlignment.Top;
            mainPanel.Children.Add(border01);
            mainPanel.Children.Add(border02);

            //
            // Use a DrawingBrush to create a checkered background for the page.
            //
            GeometryDrawing backgroundSquareDrawing = 
                new GeometryDrawing(
                    Brushes.White,
                    null,
                    new RectangleGeometry(new Rect(0,0,1,1)));
            GeometryGroup twoRectangles = new GeometryGroup();
            twoRectangles.Children.Add(new RectangleGeometry(new Rect(0,0,0.5,0.5)));
            twoRectangles.Children.Add(new RectangleGeometry(new Rect(0.5,0.5,0.5,0.5)));
            SolidColorBrush squaresBrush = 
                new SolidColorBrush(Color.FromArgb(102,204,204,204));
            squaresBrush.Opacity = 0.4;
            GeometryDrawing checkerDrawing = 
                new GeometryDrawing(
                    squaresBrush,
                    null,
                    twoRectangles);
            DrawingGroup checkerDrawings = new DrawingGroup();
            checkerDrawings.Children.Add(backgroundSquareDrawing);
            checkerDrawings.Children.Add(checkerDrawing);
            DrawingBrush checkerBrush = new DrawingBrush(checkerDrawings);
            checkerBrush.Viewport = new Rect(0,0,10,10);
            checkerBrush.ViewportUnits = BrushMappingMode.Absolute;
            checkerBrush.TileMode = TileMode.Tile;
            checkerBrush.Freeze();

            this.Background = checkerBrush;
            this.Content = mainPanel;

        }

    }
}
<Page 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:PresentationOptions="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" 
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  mc:Ignorable="PresentationOptions">

  <StackPanel Margin="20" Orientation="Horizontal" 
    HorizontalAlignment="Left" VerticalAlignment="Top">

    <!-- Shows the DrawingGroup without the blur effect. -->
    <Border BorderBrush="Gray" BorderThickness="1"  Margin="10"
      VerticalAlignment="Top">
      <Image Stretch="None" HorizontalAlignment="Left">
        <Image.Source>
          <DrawingImage PresentationOptions:Freeze="True">
            <DrawingImage.Drawing>
              <DrawingGroup>
                <GeometryDrawing Brush="Lime" Geometry="M 25,25 L 0,50 25,75 50,50 25,25 25,0">
                  <GeometryDrawing.Pen>
                    <Pen Thickness="10" Brush="Black" />
                  </GeometryDrawing.Pen>
                </GeometryDrawing>
                <GeometryDrawing Brush="Lime">
                  <GeometryDrawing.Geometry>
                    <EllipseGeometry Center="10,10" RadiusX="5" RadiusY="5" />
                  </GeometryDrawing.Geometry>
                  <GeometryDrawing.Pen>
                    <Pen Thickness="2" Brush="Black" />
                  </GeometryDrawing.Pen>
                </GeometryDrawing>
              </DrawingGroup>
            </DrawingImage.Drawing>
          </DrawingImage>
        </Image.Source>
      </Image>
    </Border>

    <Border BorderBrush="Gray" BorderThickness="1" Margin="50,10,10,10"
      VerticalAlignment="Top">
      <Image Stretch="None" HorizontalAlignment="Left">
        <Image.Source>
          <DrawingImage PresentationOptions:Freeze="True">
            <DrawingImage.Drawing>

              <!-- The drawing group, with a BlurBitmapEffect. -->
              <DrawingGroup>
                <GeometryDrawing Brush="Lime" Geometry="M 25,25 L 0,50 25,75 50,50 25,25 25,0">
                  <GeometryDrawing.Pen>
                    <Pen Thickness="10" Brush="Black" />
                  </GeometryDrawing.Pen>
                </GeometryDrawing>
                <GeometryDrawing Brush="Lime">
                  <GeometryDrawing.Geometry>
                    <EllipseGeometry Center="10,10" RadiusX="5" RadiusY="5" />
                  </GeometryDrawing.Geometry>
                  <GeometryDrawing.Pen>
                    <Pen Thickness="2" Brush="Black" />
                  </GeometryDrawing.Pen>
                </GeometryDrawing>

                <DrawingGroup.BitmapEffect>
                  <BlurBitmapEffect Radius="5"  />
                </DrawingGroup.BitmapEffect>
              </DrawingGroup>
            </DrawingImage.Drawing>
          </DrawingImage>
        </Image.Source>
      </Image>
    </Border>
  </StackPanel>

  <Page.Background>

    <!-- Creates a checkered background. -->
    <DrawingBrush Viewport="0,0,10,10" ViewportUnits="Absolute" TileMode="Tile"
      PresentationOptions:Freeze="True">
      <DrawingBrush.Drawing>
        <DrawingGroup>
          <GeometryDrawing Brush="White">
            <GeometryDrawing.Geometry>
              <RectangleGeometry Rect="0 0 1 1"/>
            </GeometryDrawing.Geometry>
          </GeometryDrawing>
          <GeometryDrawing Brush="#66CCCCCC">
            <GeometryDrawing.Geometry>
              <GeometryGroup>
                <RectangleGeometry Rect="0 0 0.5 0.5" />
                <RectangleGeometry Rect="0.5 0.5 0.5 0.5"/>
              </GeometryGroup>
            </GeometryDrawing.Geometry>
          </GeometryDrawing>
        </DrawingGroup>
      </DrawingBrush.Drawing>
    </DrawingBrush>
  </Page.Background>
</Page>

注釈

ビットマップ効果とその動作の詳細については、「ビットマップ効果の概要」を参照してください。For more information about bitmap effects and how they work, see Bitmap Effects Overview.

DrawingGroup操作は次の順序で適用されます。DrawingGroup operations are applied in the following order:

依存プロパティ情報Dependency Property Information

識別子フィールドIdentifier field BitmapEffectProperty
メタデータプロパティがに設定されるtrueMetadata properties set to true NoneNone

適用対象