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CanvasBitmapLoadAsync Method (ICanvasResourceCreator, IRandomAccessStream, Single, CanvasAlphaMode)
Loads a bitmap from a stream, and assigns it the specified DPI and alpha behavior.

Namespace:  Microsoft.Graphics.Canvas
Assembly:  Microsoft.Graphics.Canvas (in Microsoft.Graphics.Canvas.dll) Version: 0.0.0.0
Syntax
C#
Copy
public static IAsyncOperation<CanvasBitmap> LoadAsync(
	ICanvasResourceCreator resourceCreator,
	IRandomAccessStream stream,
	float dpi,
	CanvasAlphaMode alpha
)

Parameters

resourceCreator
Type: Microsoft.Graphics.CanvasICanvasResourceCreator
stream
Type: Windows.Storage.StreamsIRandomAccessStream
dpi
Type: SystemSingle
alpha
Type: Microsoft.Graphics.CanvasCanvasAlphaMode

Return Value

Type: IAsyncOperationCanvasBitmap
Remarks

This method requires that the stream be readable.

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.

See Also