XvGetStill man page on aLinux

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XvGetStill(3)							 XvGetStill(3)

Name
       XvGetStill - capture a single frame of video from a drawable

Syntax
       #include <X11/extensions/Xvlib.h>

       XvGetStill(Display *dpy, XvPortID port, Drawable d, GC gc,
		  int vx, int vy, unsigned int vw, unsigned int vh,
		  int dx, int dy, unsigned int dw, unsigned int dh);

Arguments
       dpy	      Specifies the connection to the X server.

       port	      Defines the port to which the still is output'd.

       d	      Defines  the drawable from which the still is to be cap‐
		      tured.  Pixmaps are currently not supported.

       gc	      Defines the graphical context.  GC components are:  sub‐
		      window-mode,  clip-x-origin,  clip-y-origin,  and	 clip-
		      mask.

       vx,vy,vw,vh    Define the location and size of  the  destination	 video
		      region into which the still is to be written.  vx and vy
		      define the x and y coordinates of the upper-left	corner
		      of  the  video  region;  vw  and vh define the width and
		      height, in pixels, of the video region.

       dx,dy,dw,dh    Define the location and size of the source drawable from
		      which  the  still	 image	is  to be captured.  dx and dy
		      define the x and y coordinates of the upper-left	corner
		      of  the  drawable region; dw and dh define the width and
		      height, in pixels, of the drawable region.

Description
       captures a single frame of video from a	drawable.   The	 position  and
       size  of	 the destination (video) rectangle is specified by vx, vy, vw,
       and vh.	The position and size of the source  (drawable)	 rectangle  is
       specified by dx, dy, dw, and dh.

       Drawable	 data  is clipped to the bounds of the drawable, scaled to the
       requested video region size (or the closest size supported) and clipped
       to  the	bounds	of the video encoding.	The contents of any region not
       updated with drawable data is undefined.

       If the port is grabbed by another client, this request is ignored,  and
       an  XvVideoNotify  event	 with detail XvBusy is generated for the draw‐
       able.

Returned Values
       [Success]
	       Returned if XvGetStill(3) completed successfully.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvGetStill(3) failed to allocate memory to  process
	       the request.

Diagnostics
       [XvBadPort]
	       Generated if the requested port does not exist.

       [BadDrawable]
	       Generated if the requested drawable does not exist.

       [BadGC] Generated if the requested graphics context does not exist.

       [BadAlloc]
	       Generated  if  there were insufficient resources to process the
	       request.

See Also
       XvPutStill(3), XvGetVideo(3), XvPutVideo(3), XvVideoNotify(3)

X Version 11			  libXv 1.0.4			 XvGetStill(3)
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