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X11R7.4 - man page for xvquerybestsize (x11r4 section 3)

XvQueryBestSize(3)			       Library Functions Manual 			   XvQueryBestSize(3)

Name
       XvQueryBestSize - determine the optimum drawable region size

Syntax
       #include <X11/extensions/Xvlib.h>

       XvQueryBestSize(Display *dpy, XvPort port, Bool motion,
		       unsigned int vw, unsigned int vh,
		       unsigned int dw, unsigned int dh,
		       unsigned int *p_dw, unsigned int *p_dh);

Arguments
       dpy	      Specifies the connection to the X server.

       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  destina-
		      tion 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 returned.

Description
       Some  ports may be able to scale incoming or outgoing video.  XvQueryBestSize(3) returns the size of the clos-
       est 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
       [Success]
	       Returned if XvQueryBestSize(3) completed successfully.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvQueryBestSize(3) failed to allocate memory to process the request.

Diagnostics
       [XvBadPort]
	       Generated if the requested port does not exist.

X Version 11					     libXv 1.0.4				   XvQueryBestSize(3)


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