IMFVideoMixerBitmap interface (evr9.h)
Alpha-blends a static bitmap image with the video displayed by the Enhanced Video Renderer (EVR).
The EVR mixer implements this interface. To get a pointer to the interface, call IMFGetService::GetService. The service identifier GUID is MR_VIDEO_MIXER_SERVICE. Call GetService on any of the following objects:
- The Media Session, if the topology contains an instance of the EVR.
- The EVR media sink.
- The DirectShow EVR filter.
- The EVR mixer.
Inheritance
The IMFVideoMixerBitmap interface inherits from the IUnknown interface. IMFVideoMixerBitmap also has these types of members:
Methods
The IMFVideoMixerBitmap interface has these methods.
| IMFVideoMixerBitmap::ClearAlphaBitmap Removes the current bitmap and releases any resources associated with it. |
| IMFVideoMixerBitmap::GetAlphaBitmapParameters Retrieves the current settings that the enhanced video renderer (EVR) uses to alpha-blend the bitmap with the video. |
| IMFVideoMixerBitmap::SetAlphaBitmap Sets a bitmap image for the enhanced video renderer (EVR) to alpha-blend with the video. |
| IMFVideoMixerBitmap::UpdateAlphaBitmapParameters Updates the current alpha-blending settings, including the source and destination rectangles, the color key, and other information. You can update some or all of the blending parameters. |
Requirements
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Target Platform | Windows |
| Header | evr9.h |