1XvQueryBestSize(3)         Library Functions Manual         XvQueryBestSize(3)
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Name

6       XvQueryBestSize - determine the optimum drawable region size
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Syntax

9       #include <X11/extensions/Xvlib.h>
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11       XvQueryBestSize(dpy, port, motion, vw, vh, dw, dh, p_dw, p_dh)
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13       Display *dpy;
14       XvPortID port;
15       Bool motion;
16       unsigned int vw, vh;
17       unsigned int dw, dh;
18       unsigned int *p_dw, *p_dh;
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Arguments

21       dpy            Specifies the connection to the X server.
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23       port           Defines the port associated with the display and adaptor
24                      for which the optimum size is to be calculated.
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26       motion         Specifies True if the destination size needs to  support
27                      full motion, and False if the destination size need only
28                      support still images.
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30       vw,vh          Specifies the size of the source video region desired.
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32       dw,dh          Specifies the size of the  destination  drawable  region
33                      desired.
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35       p_dw,p_dh      Pointers  to  where  the  closest destination sizes sup‐
36                      ported by the server are returned.
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Description

39       Some  ports  may  be  able  to  scale  incoming  or   outgoing   video.
40       XvQueryBestSize(3)  returns  the size of the closest destination region
41       that is supported by the adaptor.  The returned size is  guaranteed  to
42       be smaller than the requested size if a smaller size is supported.
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Returned Values

45       [Success]
46               Returned if XvQueryBestSize(3) completed successfully.
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48       [XvBadExtension]
49               Returned if the Xv extension is unavailable.
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51       [XvBadAlloc]
52               Returned  if  XvQueryBestSize(3)  failed  to allocate memory to
53               process the request.
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Diagnostics

56       [XvBadPort]
57               Generated if the requested port does not exist.
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61X Version 11                      libXv 1.0.3               XvQueryBestSize(3)
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