DrawingGroup.BitmapEffect Propiedad
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Obtiene o establece el objeto BitmapEffect que se va a aplicar a este 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, setPublic Property BitmapEffect As BitmapEffectValor de propiedad
BitmapEffect que se va a aplicar a este DrawingGroup. De manera predeterminada, es null.
Ejemplos
En este ejemplo se muestra cómo aplicar un BitmapEffect objeto a un dibujo. Use para BitmapEffect desenfocar o relieve, o para aplicar otros efectos visuales al contenido representado.
Solo DrawingGroup los objetos admiten efectos de mapa de bits. Para aplicar un efecto de mapa de bits a otro tipo de Drawing objeto, agréguelo a y DrawingGroup establezca la BitmapEffect propiedad del DrawingGroup objeto .
Nota
Windows Presentation Foundation efectos de mapa de bits se representan por software. Cualquier objeto que aplique un BitmapEffect elemento también se representa en el software. Evite el uso de objetos BitmapEffect visuales o animaciones grandes, ya que este escenario puede provocar una disminución del rendimiento del sistema.
En el ejemplo siguiente se usa un DrawingGroup para aplicar un BlurBitmapEffect objeto a varios GeometryDrawing objetos .
En la ilustración siguiente se muestra la salida de este ejemplo.
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>
Comentarios
Para obtener más información sobre los efectos del mapa de bits y cómo funcionan, vea Información general sobre efectos de mapa de bits.
DrawingGroup Las operaciones se aplican en el orden siguiente:
Información sobre propiedades de dependencia
| Campo identificador | BitmapEffectProperty |
Propiedades de metadatos establecidas en true |
Ninguno |