IVMRMixerBitmap9::UpdateAlphaBitmapParameters 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 UpdateAlphaBitmapParameters
method changes the bitmap location, size and blending value.
Syntax
HRESULT UpdateAlphaBitmapParameters(
[in] const VMR9AlphaBitmap *pBmpParms
);
Parameters
[in] pBmpParms
Pointer to a VMR9AlphaBitmap structure.
Return value
The method returns an HRESULT. Possible values include those in the following table.
Return code | Description |
---|---|
|
The method succeeded. |
Remarks
The filter graph must be running for the changes to take effect. This method does not change the bitmap image. If you specify a VMR9AlphaBitmap structure with no destination or color key set, the bitmap is not displayed. This behavior was implemented for backward compatibility.
Include DShow.h and D3d9.h before Vmr9.h.
Requirements
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 |