IVMRFilterConfig9::GetRenderingPrefs 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetRenderingPrefs method retrieves the current set of rendering preferences being used by the VMR-9.
Syntax
HRESULT GetRenderingPrefs(
[out] DWORD *pdwRenderFlags
);
Parameters
[out] pdwRenderFlags
Receives a VMR9RenderPrefs value indicating the current rendering preferences.
Return value
The method returns an HRESULT. Possible values include those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
The VMR has not created an allocator-presenter, or the allocator-presenter does not implement the IVMRImagePresenterConfig9 interface. |
Remarks
If the allocator-presenter implements the IVMRImagePresenterConfig9 interface, this method calls the IVMRImagePresenterConfig9::GetRenderingPrefs method on the allocator-presenter.
The default allocator-presenter implements IVMRImagePresenterConfig9. Custom allocator-presenters can also implements this interface if desired.
If the VMR-9 has not yet created the allocator-presenter, or if a custom allocator-presenter does not support IVMRImagePresenterConfig9, this method returns VFW_E_WRONG_STATE. To create the default allocator-presenter, call IVMRFilterConfig9::SetRenderingMode with the value VMR9Mode_Windowed or VMR9Mode_Windowless.
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 |