[SDL] limiting SDL output in full screen mode to window's bounds

[Unnamalai K Bashyam]

Hi,
 I am developing a GTK application with a drawable in which a mediaplayer's
video output will be displayed. I use the environment variable SDL_WINDOWID
to give the SDL to use the window of the drawing area.

           long sdl_xwid;
           sdl_xwid = GDK_DRAWABLE_XID (screen->window); //where screen is a
Gtk_Drawable widget

            char SDL_windowhack[32];
            sprintf (SDL_windowhack, "SDL_WINDOWID=%ld", sdl_xwid);
            putenv (SDL_windowhack);

The display of video on drawing the area is fine in normal screen mode. When
i change to full screen mode, only a part of the zoomed video is seen on the
drawing area. The window has to be resized to view the complete screen. How
do i limit the full screen video  display  to within the bounds of the
drawing area (which is 320 X 240 pixels)?
 Is there any SDL environment variable available for this purpose?

Thanks,
Unna
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