CompositionMaskBrush 类

参考

定义

命名空间:: Windows.UI.Composition

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

编辑

使用 CompositionBrush 绘制 SpriteVisual，并应用了不透明度掩码。不透明度掩码的源可以是 CompositionColorBrush、CompositionLinearGradientBrush、CompositionSurfaceBrush、CompositionEffectBrush 或 CompositionNineGridBrush 类型的任意 CompositionBrush。不透明度蒙板必须指定为 CompositionSurfaceBrush。

public ref class CompositionMaskBrush sealed : CompositionBrush

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 196608)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class CompositionMaskBrush final : CompositionBrush

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 196608)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class CompositionMaskBrush : CompositionBrush

Public NotInheritable Class CompositionMaskBrush
Inherits CompositionBrush

继承: Object Platform::Object IInspectable CompositionObject CompositionBrush CompositionMaskBrush

属性: ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows 要求

设备系列	Windows 10 Anniversary Edition (在 10.0.14393.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v3.0 中引入)

示例

将star形状的蒙板应用于图像。

private SpriteVisual CreateCircleImage(ICompositionSurface myImageSurface, ICompositionSurface myStarMaskSurface) 
{ 
  // Create SurfaceBrush with image surface and specify stretch and alignment 
  CompositionSurfaceBrush imageBrush = _compositor.CreateSurfaceBrush(myImageSurface); 
  imageBrush.HorizontalAlignmentRatio = 0.5f; 
  imageBrush.VerticalAlignmentRatio = 0.5f; 
  imageBrush.Stretch = CompositionStretch.UniformToFill; 

  // Create surface brush with opacity mask surface and specify stretch and alignment 
  CompositionSurfaceBrush starMaskBrush = _compositor.CreateSurfaceBrush(myStarMaskSurface); 
  starMaskBrush.Stretch = CompositionStretch.Uniform; 

  // SpriteVisual to be painted with masked content 
  SpriteVisual imageVisual = _compositor.CreateSpriteVisual(); 
  imageVisual.Size = new Vector2(200, 200); 

  // Create MaskBrush 
  CompositionMaskBrush maskBrush = _compositor.CreateMaskBrush(); 
  maskBrush.Source = imageBrush; // Set source to content that is to be masked 
  maskBrush.Mask = starMaskBrush; // Set mask to content that is the opacity mask 

  imageVisual.Brush = maskBrush; // Paint SpriteVisual with MaskBrush 

  return imageVisual;           
}

将不透明蒙板应用于纯色填充以创建形状;对不透明蒙板 CompositionSurfaceBrush 上的转换属性进行动画处理，以创建颜色开花动画

private void CreateCircleMaskSprite(ICompositionSurface myCircleMaskSurface, ICompositionSurface myImageSurface)
{
  // SpriteVisual to be painted by MaskBrush
  _circleVisual = _compositor.CreateSpriteVisual();
  _circleVisual.Size = MyContainerGrid.RenderSize.ToVector2();

  // SurfaceBrush w/ image as MaskBrush.Source
  CompositionSurfaceBrush imageBrush = _compositor.CreateSurfaceBrush(myImageSurface);
  imageBrush.Stretch = CompositionStretch.UniformToFill;

  // SurfaceBrush w/ opacity mask surface as MaskBrush.Mask
  CompositionSurfaceBrush circleBrush = _compositor.CreateSurfaceBrush(myCircleMaskSurface);

  // Specify stretch and transform properties to scale and position brush for initial state
  circleBrush.Stretch = CompositionStretch.Uniform;
  circleBrush.CenterPoint = _circleVisual.Size / 2;
  circleBrush.Scale = new Vector2(0.5f);

  // Create MaskBrush
  CompositionMaskBrush maskBrush = _compositor.CreateMaskBrush();
  maskBrush.Source = imageBrush;
  maskBrush.Mask = circleBrush;
  _circleVisual.Brush = maskBrush;

  // Set SpriteVisual as child of XAML Grid
  ElementCompositionPreview.SetElementChildVisual(MyContainerGrid, _circleVisual);
}

private void BloomAnimation()
{
  // Create KeyFrame Animation to target Scale transform on SurfaceBrush 
  Vector2KeyFrameAnimation scaleAnimation = _compositor.CreateVector2KeyFrameAnimation();
  scaleAnimation.InsertKeyFrame(1.0f, new Vector2(2));
  scaleAnimation.Duration = TimeSpan.FromMilliseconds(500);

  var maskBrush = (CompositionMaskBrush)_circleVisual.Brush;
  var surfaceBrush = (CompositionSurfaceBrush) maskBrush.Mask;

  // Animate the Scale on the circle opacity mask
  surfaceBrush.StartAnimation("Scale", scaleAnimation);      
}

应用圆角矩形蒙板创建纯色圆角矩形，其角半径在调整大小后不会增加 (使用 CompositionNineGridBrush 作为 CompositionMaskBrush ) 的输入。

private SpriteVisual CreateMaskedRoundedRectVisual(ICompositionSurface myRoundedRectMaskSurface)
{
  // ColorBrush to be set as MaskBrush.Source
  CompositionColorBrush colorBrush = _compositor.CreateColorBrush(Colors.Blue);

  // SurfaceBrush w/ opacity mask surface
  CompositionSurfaceBrush roundedRectBrush = _compositor.CreateSurfaceBrush(myRoundedRectMaskSurface);
  roundedRectBrush.Stretch = CompositionStretch.Fill; // stretch for center of nine-grid

  // NineGridBrush w/ insets on opacity mask surface
  CompositionNineGridBrush ninegridBrush = _compositor.CreateNineGridBrush();
  ninegridBrush.Source = roundedRectBrush;
  ninegridBrush.SetInsets(_cornerRadius); // the radius, in pixels, of the corner as specified on my opacity mask surface 

  // Create MaskBrush
  CompositionMaskBrush maskBrush = _compositor.CreateMaskBrush();
  maskBrush.Source = colorBrush;
  maskBrush.Mask = ninegridBrush;

  // Paint SpriteVisual with MaskBrush
  SpriteVisual sprite = _compositor.CreateSpriteVisual();
  sprite.Size = new Vector2(300, 200);
  sprite.Brush = maskBrush;
  return sprite;

}

注解

CompositionMaskBrush 不能设置为 CompositionEffectBrush 的源参数。如果要将 IGraphicsEffect 应用于掩码内容，请改用 CompositionEffectBrush 和复合效果。

属性

Comment	要与 CompositionObject 关联的字符串。 (继承自 CompositionObject)
Compositor	用于创建此 CompositionObject 的 Compositor。 (继承自 CompositionObject)
Dispatcher	CompositionObject 的调度程序。 (继承自 CompositionObject)
DispatcherQueue	获取 CompostionObject 的 DispatcherQueue 。 (继承自 CompositionObject)
ImplicitAnimations	附加到此对象的隐式动画集合。 (继承自 CompositionObject)
Mask	一个画笔，该画笔包含源画笔内容的不透明度掩码。可以是 CompositionSurfaceBrush 或 CompositionNineGridBrush 类型。
Properties	与 CompositionObject 关联的属性的集合。 (继承自 CompositionObject)
Source	一个画笔，其内容将由不透明度掩码屏蔽。可以是 CompositionSurfaceBrush、CompositionColorBrush 或 CompositionNineGridBrush 类型。

方法

Close()	关闭 CompositionObject 并释放系统资源。 (继承自 CompositionObject)
ConnectAnimation(String, CompositionAnimation)	连接和动画。 (继承自 CompositionObject)
DisconnectAnimation(String)	断开动画的连接。 (继承自 CompositionObject)
Dispose()	执行与释放或重置非托管资源关联的应用程序定义的任务。 (继承自 CompositionObject)
PopulatePropertyInfo(String, AnimationPropertyInfo)	定义可进行动画处理的属性。 (继承自 CompositionObject)
StartAnimation(String, CompositionAnimation)	使用对象的指定属性连接动画并启动动画。 (继承自 CompositionObject)
StartAnimation(String, CompositionAnimation, AnimationController)	使用对象的指定属性连接动画并启动动画。 (继承自 CompositionObject)
StartAnimationGroup(ICompositionAnimationBase)	启动动画组。 CompositionObject 上的 StartAnimationGroup 方法可用于启动 CompositionAnimationGroup。组中的所有动画将同时在对象上启动。 (继承自 CompositionObject)
StopAnimation(String)	断开动画与指定属性的连接并停止动画。 (继承自 CompositionObject)
StopAnimationGroup(ICompositionAnimationBase)	停止动画组。 (继承自 CompositionObject)
TryGetAnimationController(String)	返回指定属性上运行的动画的 AnimationController。 (继承自 CompositionObject)

适用于

CompositionMaskBrush 类

定义

Windows 要求

示例

注解

属性

方法

适用于

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