IVMRMixerBitmap9::GetAlphaBitmapParameters method (vmr9.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The GetAlphaBitmapParameters method retrieves a copy of the current image and related blending parameters.
Syntax
HRESULT GetAlphaBitmapParameters(
[out] VMR9AlphaBitmap *pBmpParms
);
Parameters
[out] pBmpParms
Pointer to a VMR9AlphaBitmap structure that receives the bitmap, information about the blending values, and the location to blend it.
Return value
The method returns an HRESULT. Possible values include those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
pBmpParms is invalid. |
|
The mixer has not been loaded. |
Remarks
Include DShow.h and D3d9.h before Vmr9.h.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP2 [desktop apps only] |
| Minimum supported server | Windows Server 2003 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | vmr9.h |
| Library | Strmiids.lib |