IDirectDrawVideo::SetDirectDraw method (amvideo.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetDirectDraw method passes the IDirectDraw interface to a loaded driver.
Syntax
HRESULT SetDirectDraw(
LPDIRECTDRAW pDirectDraw
);
Parameters
pDirectDraw
Pointer to the IDirectDraw interface to be passed.
Return value
Returns an HRESULT value.
Remarks
To have the renderer release a DirectDraw interface previously passed in through SetDirectDraw, an application can call SetDirectDraw and pass in NULL. However, the renderer will continue using that DirectDraw interface until it is disconnected. Therefore, calling SetDirectDraw with a NULL parameter does not make the renderer stop using it immediately.
This method was created because only one instance of IDirectDraw could be loaded per process in versions of DirectDraw prior to DirectX 7.0. If you are using DirectX 7.0 or later, you never need to call this method. If an application wanted to load IDirectDraw but allow the Video Renderer to also allocate surfaces, the application could open IDirectDraw itself and then pass the interface to the loaded driver through IDirectDrawVideo::SetDirectDraw. Alternatively, the application could let the renderer load DirectDraw and then obtain a reference-incremented interface to it through IDirectDrawVideo::GetDirectDraw. Because DirectShow ships with the most recently shipped version of DirectDraw, however, this method is not required unless the application wants to change display modes itself and pass in a DirectDraw object, which the renderer can then use to allocate surfaces.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | amvideo.h (include Dshow.h) |
| Library | Strmiids.lib |