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+.TH XvGetVideo 3X  __vendorversion__
+.\" $XFree86: xc/doc/man/Xv/XvGetVideo.man,v 1.5 2001/01/27 18:20:36 dawes Exp $
+.SH Name
+XvGetVideo \- capture video from a drawable
+.\"
+.SH Syntax
+.B include "Xvlib.h"
+.sp 1l
+.B XvGetVideo(dpy, port, d, gc, vx, vy, vw, vh, dx, dy, dw, dh)
+.sp 1l
+.B register 
+.I Display 
+.I *dpy;
+.br
+.B XvPortID 
+.I port;
+.br
+.B Drawable 
+.I d;
+.br
+.B GC 
+.I gc;
+.br
+.B int 
+.I vx, 
+.I vy, 
+.I dx, 
+.I dy;
+.br
+unsigned int 
+.I vw, 
+.I vh;
+.br
+unsigned int 
+.I dw, 
+.I dh;
+.sp 1l
+.\"
+.SH Arguments
+.\"
+.IP \fIdpy\fR 15
+Specifies the display screen on which the
+Xv Server is to accept requests from Xv clients.  If the
+display option is not specified, Xv uses the display screen
+specified by your DISPLAY environment variable.  The display
+option has the format hostname:number.  Using two colons
+(::) instead of one (:) indicates that DECnet is to be used
+for transport.
+.IP \fIport\fR 15
+Defines the port to which video output is sent.
+.IP \fId\fR 15
+Defines the drawable (window) from which video output is to be obtained.
+.IP \fIgc\fR 15
+Defines the graphical context.  GC components are: 
+.I subwindow-mode, 
+.I clip-x-origin, 
+.I clip-y-origin,
+and 
+.I clip-mask.
+.IP \fIvx,vy,vw,vh\fR 15
+Define the location and size of the video region is to be written.  \fIvx\fP 
+and \fIvy\fP define the 
+.I x and
+.I y
+coordinates of the upper-left corner of the video region; 
+.I vw and
+.I vh
+define the width and height, in pixels, of the video region.
+.IP \fIdx,dy,dw,dh\fR 15
+Define the location of the source drawable from which the
+video image is to be taken.  
+.I dx and
+.I dy 
+define the 
+.I x and
+.I y 
+coordinates of the upper-left corner of the drawable region; 
+.I dw and 
+.I dh 
+define the width and height, in pixels, of the drawable region.
+.br
+.SH Description
+.PN XvGetVideo
+outputs video from a drawable.  The position
+and size of the destination rectangle is specified by 
+.I vx,
+.I vy, 
+.I vw, 
+and 
+.I vh.  
+The position and size of the source rectangle is specified by 
+.I dx, 
+.I dy, 
+.I dw, 
+and 
+.I dh.
+.PP
+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.
+.PP
+If video is successfully initiated, an XvVideoNotify event with
+detail XvStarted is generated for the drawable.  If the port is
+already in use, its video is preempted, and if the new drawable is
+different than the old, an XvVideoNotify event with detail XvPreempted
+is generated for the old drawable.  If the port is grabbed by another
+client, this request is ignored, and an XvVideoNotify event with detail
+XvBusy is generated for the drawable.
+.\"
+.br
+.SH Returned Values
+.IP [Success] 8
+Returned if XvGetVideo(3X) completed successfully.
+.IP [XvBadExtension] 8
+Returned if the Xv extension is unavailable.
+.IP [XvBadAlloc] 8
+Returned if XvGetVideo(3X) failed to allocate memory to process
+the request.
+.SH Diagnostics
+.IP [XvBadPort] 8
+Generated if the requested port does not exist.
+.IP [BadGC] 8
+Generated if the requested graphics context does not exist.
+.IP [BadDrawable] 8
+Generated if the requested drawable does not exist.
+.IP [BadAlloc] 8
+Generated if there were insufficient resources to process the request.
+.SH See Also
+.br
+.\"
+XvGetStill(3X), XvPutVideo(3X), XvVideoNotify(3X)
+.br