BitmapAlphaMode BitmapAlphaMode BitmapAlphaMode BitmapAlphaMode Enum

Specifies the alpha mode of pixel data.

Syntax

Declaration

public enum BitmapAlphaModepublic enum BitmapAlphaModePublic Enum BitmapAlphaModepublic enum BitmapAlphaMode

Remarks

BitmapAlphaMode is used in conjunction with BitmapPixelFormat to describe the pixel data.

Using the Ignore value effectively treats the pixel data as opaque by discarding the alpha channel data. For example, pixel data returned by a decoder with an alpha mode of Ignore and a pixel format of Rgba8 will have alpha channel values of 0.

Fields

Ignore
Ignore
Ignore
Ignore

The alpha value is ignored.

Premultiplied
Premultiplied
Premultiplied
Premultiplied

The alpha value has been premultiplied. Each color is first scaled by the alpha value.

Straight
Straight
Straight
Straight

The alpha value has not been premultiplied. The alpha channel indicates the transparency of the color.

Device family

Windows 10 (introduced v10.0.10240.0)

API contract

Windows.Foundation.UniversalApiContract (introduced v1)

Attributes

Windows.Foundation.Metadata.ContractVersionAttribute

Details

Assembly

Windows.Graphics.Imaging.dll