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xvquerybestsize(3) [x11r4 man page]

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 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.

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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XvQueryBestSize(3)						  libXv Functions						XvQueryBestSize(3)

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. X Version 11 libXv 1.0.9 XvQueryBestSize(3)
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