Finding a Filter That Supports Full-Screen Mode (Windows Embedded CE 6.0)
1/6/2010
The first option is to search for a filter in the filter graph that supports full-screen mode directly.
When asked to go into full-screen mode, the IVideoWindow PID first scans all filters supporting IVideoWindow in the filter graph. The PID calls IVideoWindow::get_FullScreenMode on each filter and, if the filter returns E_NOTIMP (the default), assumes that the filter has no inherent support for full-screen playback.
If the filter returns anything else, that filter becomes the nominated filter for full-screen playback. This means that any calls to the filter graph manager to set the full-screen mode on or off are sent directly to that nominated filter.
This mechanism allows filters to be extended to support full-screen support directly.
Most normal window-based renderers do not need to support this functionality.