NAME
XvQueryBestSize - determine the optimum drawable region size
SYNOPSIS
#include <X11/extensions/Xvlib.h>
int 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 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.
DESCRIPTION
Some ports may be able to scale incoming or outgoing video.
XvQueryBestSize(3) 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.
RETURN 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.