MirBSD manpage: XvQueryBestSize(3)

XvQueryBestSize(3X) UNIX Programmer's Manual  XvQueryBestSize(3X)


     XvQueryBestSize - determine the optimum drawable region size


     #include <X11/extensions/Xvlib.h>

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

     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 display 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 des-
                    tination size need only support still images.

     vw,vh          Specifies the size of the source video region

     dw,dh          Specifies the size of the destination draw-
                    able region desired.

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


     Some ports may be able to scale incoming or outgoing video.
     XvQueryBestSize(3X) returns the size of the closest destina-
     tion 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


XFree86                   Version 4.5.0                         1

XvQueryBestSize(3X) UNIX Programmer's Manual  XvQueryBestSize(3X)

             Returned if XvQueryBestSize(3X) completed success-

             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 4.5.0                         2

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