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XvQueryBestSize(3X)							      XvQueryBestSize(3X)

       XvQueryBestSize - determine the optimum drawable region size

       #include <X11/extensions/Xvlib.h>

       XvQueryBestSize(dpy, port, motion, vw, vh, dw, dh, p_dw, p_dh)

       Display *dpy;
       XvPortID port;
       Bool motion;
       unsigned int vw, vh;
       unsigned int dw, dh;
       unsigned int *p_dw, *p_dh;

       dpy	      Specifies  the  display screen on which the Xv Server is to accept requests
		      from Xv clients.	If the display option is not specified, Xv uses the  dis-
		      play  screen  specified  by your DISPLAY environment variable.  The display
		      option has the format hostname:number.  Using two colons	(::)  instead  of
		      one (:) indicates that DECnet is to be used for transport.

       port	      Defines  the  port  associated  with  the display and adaptor for which the
		      optimum size is to be calculated.

       motion	      Specifies True if the destination size needs to support  full  motion,  and
		      False if the destination size need only support still images.

       vw,vh	      Specifies the size of the source video region desired.

       dw,dh	      Specifies the size of the destination drawable region desired.

       p_dw,p_dh      Pointers to where the closest destination sizes supported by the server are

       Some ports may be able to scale incoming or outgoing video.   XvQueryBestSize(3X)  returns
       the size of the closest destination region that is supported by the adaptor.  The returned
       size is guaranteed to be smaller than the requested size if a smaller size is supported.

Returned Values
	       Returned if XvQueryBestSize(3X) completed successfully.

	       Returned if the Xv extension is unavailable.

	       Returned if XvQueryBestSize(3X) failed to allocate memory to process the request.

	       Generated if the requested port does not exist.

XFree86 			      Version Version 4.3.0		      XvQueryBestSize(3X)
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