Composition​Virtual​Drawing​Surface Composition​Virtual​Drawing​Surface Composition​Virtual​Drawing​Surface Class

Definition

Namespace:
Windows.UI.Composition Windows.UI.Composition Windows.UI.Composition
Edit

Represents sparsely allocated bitmaps that can be associated with visuals for composition in a visual tree.�

public : class CompositionVirtualDrawingSurface : CompositionDrawingSurface, ICompositionVirtualDrawingSurfacepublic class CompositionVirtualDrawingSurface : CompositionDrawingSurface, ICompositionVirtualDrawingSurfacePublic Class CompositionVirtualDrawingSurface Inherits CompositionDrawingSurface Implements ICompositionVirtualDrawingSurface
Inheritance
CompositionObjectCompositionObjectCompositionObject
CompositionDrawingSurfaceCompositionDrawingSurfaceCompositionDrawingSurface
CompositionVirtualDrawingSurfaceCompositionVirtualDrawingSurfaceCompositionVirtualDrawingSurface
Attributes
ComposableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute WebHostHiddenAttribute
Windows 10 requirements
Device family
Windows 10 Creators Update (introduced v10.0.15063.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v4)

Inherited Members

Inherited properties

AlphaModeAlphaModeAlphaMode
CommentCommentComment
CompositorCompositorCompositor
DispatcherDispatcherDispatcher
DispatcherQueueDispatcherQueueDispatcherQueue
ImplicitAnimationsImplicitAnimationsImplicitAnimations
PixelFormatPixelFormatPixelFormat
PropertiesPropertiesProperties
SizeSizeSize
SizeInt32SizeInt32SizeInt32

Inherited methods

CloseCloseClose
Resize(SizeInt32)Resize(SizeInt32)Resize(SizeInt32)
Scroll(PointInt32)Scroll(PointInt32)Scroll(PointInt32)
Scroll(PointInt32,RectInt32)Scroll(PointInt32,RectInt32)Scroll(PointInt32,RectInt32)
ScrollWithClip(PointInt32,RectInt32)ScrollWithClip(PointInt32,RectInt32)ScrollWithClip(PointInt32,RectInt32)
ScrollWithClip(PointInt32,RectInt32,RectInt32)ScrollWithClip(PointInt32,RectInt32,RectInt32)ScrollWithClip(PointInt32,RectInt32,RectInt32)
StartAnimation(String,CompositionAnimation)StartAnimation(String,CompositionAnimation)StartAnimation(String,CompositionAnimation)
StartAnimationGroup(ICompositionAnimationBase)StartAnimationGroup(ICompositionAnimationBase)StartAnimationGroup(ICompositionAnimationBase)
StopAnimation(String)StopAnimation(String)StopAnimation(String)
StopAnimationGroup(ICompositionAnimationBase)StopAnimationGroup(ICompositionAnimationBase)StopAnimationGroup(ICompositionAnimationBase)

Remarks

The virtual drawing surface is designed for usage in scenarios where an application needs to define a large amount of content but only expects a small portion of content to be visible to a user at a given time. For example, think of a long scrolling document or webpage.� In such cases, the app only needs to draw the part of the surface that is currently visible to the user, and can defer drawing portions that are not visible until later when they become visible.

Methods

Trim(RectInt32[]) Trim(RectInt32[]) Trim(RectInt32[])

Edit

Clears portions of a virtual drawing surface that were previously defined. Areas that are cleared will be treated as empty once again, and video memory that was previously backing them will be reclaimed.

public : void Trim(RectInt32[] rects)public void Trim(RectInt32[] rects)Public Function Trim(rects As RectInt32[]) As void
Parameters
rects
RectInt32[] RectInt32[] RectInt32[]

The region of the drawing surface to trim.

Attributes
ComposableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute WebHostHiddenAttribute