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X11R7.4 - man page for xvgetstill (x11r4 section 3)

XvGetStill(3)			     Library Functions Manual			    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 captured.  Pixmaps are
		      currently not supported.

       gc	      Defines the graphical context.  GC components are: subwindow-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 destina-
       tion (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  encod-
       ing.  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 drawable.

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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