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Table of Contents
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 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 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 returned.
- [Success]
- Returned
if XvQueryBestSize(3X)
completed successfully.
- [XvBadExtension]
- Returned
if the Xv extension is unavailable.
- [XvBadAlloc]
- Returned if XvQueryBestSize(3X)
failed to allocate memory to process the request.
- [XvBadPort]
- Generated
if the requested port does not exist.
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