CompositionVirtualDrawingSurface CompositionVirtualDrawingSurface CompositionVirtualDrawingSurface CompositionVirtualDrawingSurface Class

Definition

public : class CompositionVirtualDrawingSurface : CompositionDrawingSurface

struct winrt::Windows::UI::Composition::CompositionVirtualDrawingSurface : CompositionDrawingSurface

public class CompositionVirtualDrawingSurface : CompositionDrawingSurface

Public Class CompositionVirtualDrawingSurface Inherits CompositionDrawingSurface

Inheritance

CompositionObjectCompositionObject

CompositionDrawingSurfaceCompositionDrawingSurface

CompositionVirtualDrawingSurfaceCompositionVirtualDrawingSurfaceCompositionVirtualDrawingSurfaceCompositionVirtualDrawingSurface

Attributes

ComposableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute WebHostHiddenAttribute

Windows 10 requirements

Remarks

The virtual drawing surface is designed for use 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.

The maximum size of a virtual surface is 2^24(16M) pixels. This limit has been imposed because of floating point precision limits, that come into play beyond that size, which prevents guaranteed accurate pixel alignment of drawn patches.

Methods

Properties