Opacity metadata effect
You can use this effect to mark an area of an input image as opaque, so internal rendering optimizations to the graph are possible.
Note This effect doesn't modify the image itself to be opaque. It modifies data associated with the image so the renderer assumes the specified region is opaque.
The CLSID for this effect is CLSID_D2D1OpacityMetadata.
Effect properties
| Display name and index enumeration | Type and default value | Description |
|---|---|---|
|
OutputRect D2D1_OPACITYMETADATA_PROP_INPUT_OPAQUE_RECT |
D2D1_VECTOR_4F (-FLT_MAX, -FLT_MAX, FLT_MAX, FLT_MAX) |
The portion of the source image that is opaque. The default is the entire input image. |
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Build date: 11/29/2012
