BitmapAlphaMode Enum
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Specifies the alpha mode of pixel data.
public enum class BitmapAlphaMode/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
enum class BitmapAlphaMode[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
public enum BitmapAlphaModevar value = Windows.Graphics.Imaging.BitmapAlphaMode.premultipliedPublic Enum BitmapAlphaMode- Inheritance
-
BitmapAlphaMode
- Attributes
| Device family |
Windows 10 (introduced in 10.0.10240.0)
|
| API contract |
Windows.Foundation.UniversalApiContract (introduced in v1.0)
|
| Name | Value | Description |
|---|---|---|
| Premultiplied | 0 | The alpha value has been premultiplied. Each color is first scaled by the alpha value. |
| Straight | 1 | The alpha value has not been premultiplied. The alpha channel indicates the transparency of the color. |
| Ignore | 2 | The alpha value is ignored. |
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.
| Product | Versions |
|---|---|
| WinRT | Build 10240, Build 10586, Build 14383, Build 15063, Build 16299, Build 17134, Build 17763, Build 18362, Build 19041, Build 20348, Build 22000, Build 22621, Build 26100 |