120 lines
3.1 KiB
Groff
120 lines
3.1 KiB
Groff
.TH XvGetStill __libmansuffix__ __vendorversion__
|
|
.\" $XFree86: xc/doc/man/Xv/XvGetStill.man,v 1.5 2001/01/27 18:20:36 dawes Exp $
|
|
.SH Name
|
|
XvGetStill \- capture a single frame of video from a drawable
|
|
.\"
|
|
.SH Syntax
|
|
.B include "Xvlib.h"
|
|
.sp 1l
|
|
.B XvGetStill(\fIdpy, port, d, gc, vx, vy, vw, vh, dx, dy, dw, dh\fP)
|
|
.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
|
|
.B unsigned int
|
|
.I vw,
|
|
.I vh;
|
|
.br
|
|
.B unsigned int
|
|
.I dw,
|
|
.I dh;
|
|
.sp 1l
|
|
.\"
|
|
.SH Arguments
|
|
.\"
|
|
.IP \fIdpy\fR 15
|
|
Specifies the connection to the X server.
|
|
.IP \fIport\fR 15
|
|
Defines the port to which the still is output'd.
|
|
.IP \fId\fR 15
|
|
Defines the drawable from which the still is to be captured.
|
|
Pixmaps are currently not supported.
|
|
.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 destination video region
|
|
into which the still 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 and size of the source drawable from which the
|
|
still image is to be captured.
|
|
.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.
|
|
.\"
|
|
.SH Description
|
|
.\"
|
|
.PN XvGetStill
|
|
captures a single frame of video from a drawable. The
|
|
position and size of the destination (video) rectangle is specified by \fIvx,
|
|
vy, vw\fR, and \fIvh\fR. The position and size of the
|
|
source (drawable) rectangle is
|
|
specified by \fIdx, dy, dw\fR, and \fIdh\fR.
|
|
.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 the still is successfully captured an XvVideoNotify event with
|
|
./" detail XvStill is generated for the drawable.
|
|
./" [mhs]: Not in this universe
|
|
If the port is grabbed
|
|
by another client, this request is ignored, and an XvVideoNotify event
|
|
with detail XvBusy is generated for the drawable.
|
|
.SH Returned Values
|
|
.IP [Success] 8
|
|
Returned if XvGetStill(__libmansuffix__) completed successfully.
|
|
.IP [XvBadExtension] 8
|
|
Returned if the Xv extension is unavailable.
|
|
.IP [XvBadAlloc] 8
|
|
Returned if XvGetStill(__libmansuffix__) failed to allocate memory to process
|
|
the request.
|
|
.SH Diagnostics
|
|
.IP [XvBadPort] 8
|
|
Generated if the requested port does not exist.
|
|
.IP [BadDrawable] 8
|
|
Generated if the requested drawable does not exist.
|
|
.IP [BadGC] 8
|
|
Generated if the requested graphics context does not exist.
|
|
.IP [BadAlloc] 8
|
|
Generated if there were insufficient resources to process the request.
|
|
.\"
|
|
.SH See Also
|
|
.\"
|
|
XvPutStill(__libmansuffix__), XvGetVideo(__libmansuffix__), XvPutVideo(__libmansuffix__), XvVideoNotify(__libmansuffix__)
|
|
.br
|
|
|