CanvasVirtualBitmap.LoadAsync Method (ICanvasResourceCreator, Uri, CanvasVirtualBitmapOptions, CanvasAlphaMode)

Loads a virtual bitmap from a URI.

Namespace: Microsoft.Graphics.Canvas
Assembly: Microsoft.Graphics.Canvas (in Microsoft.Graphics.Canvas.dll) Version: 0.0.0.0

Syntax

Copy

public static IAsyncOperation<CanvasVirtualBitmap> LoadAsync(
	ICanvasResourceCreator resourceCreator,
	Uri uri,
	CanvasVirtualBitmapOptions options,
	CanvasAlphaMode alpha
)

Parameters

resourceCreator: Type: Microsoft.Graphics.Canvas.ICanvasResourceCreator
uri: Type: System.Uri
options: Type: Microsoft.Graphics.Canvas.CanvasVirtualBitmapOptions
alpha: Type: Microsoft.Graphics.Canvas.CanvasAlphaMode

Return Value

Type: IAsyncOperation<CanvasVirtualBitmap>

Remarks

The default options is None.

The default alpha value is Premultiplied.

When loading a JpegXR format bitmap that contains high dynamic range (HDR) pixel data, the loaded bitmap may use one of the pixel formats:

DirectXPixelFormat.R16G16B16A16Float
DirectXPixelFormat.R32G32B32A32Float
DirectXPixelFormat.R16G16B16A16UIntNormalized

For all other file formats, or when the current device does not support high dynamic range pixel formats (as reported by IsPixelFormatSupported(DirectXPixelFormat)), the loaded bitmap will use DirectXPixelFormat.B8G8R8A8UIntNormalized.

Reference

CanvasVirtualBitmap Class

LoadAsync Overload

Microsoft.Graphics.Canvas Namespace