BitmapAlphaMode enumeration

Applies to Windows and Windows Phone

Specifies the alpha mode of pixel data.

Syntax


var value = Windows.Graphics.Imaging.BitmapAlphaMode.premultiplied;

Attributes

[Version(0x06020000)]

Members

The BitmapAlphaMode enumeration has these members.

MemberValueDescription
Premultiplied | premultiplied0

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

Straight | straight1

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

Ignore | ignore2

The alpha value is ignored.

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.

Requirements

Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012

Minimum supported phone

Windows Phone 8.1 [Windows Phone Silverlight 8.1 and Windows Runtime apps]

Namespace

Windows.Graphics.Imaging
Windows::Graphics::Imaging [C++]

Metadata

Windows.winmd

See also

BitmapPixelFormat

 

 

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