IVMRMixerBitmap9::GetAlphaBitmapParameters method (vmr9.h)

2023-04-26

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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
S_OK	The method succeeded.
E_POINTER	pBmpParms is invalid.
VFW_E_WRONG_STATE	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

通过