Premultiply effect
Use this effect to convert an image from unpremultiplied alpha to premultiplied alpha. The effect replaces each input pixel P = {R, G, B, A} with P' = {R*A, G*A, B*A, A} in the output.
This effect has no properties.
The CLSID for this effect is CLSID_D2D1Premultiply.
Output bitmap
The output bitmap size is the same as the input bitmap size.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8 and Platform Update for Windows 7 [desktop apps | Windows Store apps] |
| Minimum supported server | Windows 8 and Platform Update for Windows 7 [desktop apps | Windows Store apps] |
| Header | d2d1effects.h |
| Library | d2d1.lib, dxguid.lib |
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