94 lines
3.0 KiB
Groff
94 lines
3.0 KiB
Groff
.TH XvGetStill __libmansuffix__ __vendorversion__
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.SH Name
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XvGetStill \- capture a single frame of video from a drawable
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.\"
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.SH Syntax
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.B #include <X11/extensions/Xvlib.h>
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.sp
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.nf
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.BI "XvGetStill(Display *" dpy ", XvPortID " port ", Drawable " d ", GC " gc ",
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.BI " int " vx ", int " vy ", unsigned int " vw ", unsigned int " vh ",
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.BI " int " dx ", int " dy ", unsigned int " dw ", unsigned int " dh ");"
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.fi
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.SH Arguments
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.\"
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.IP \fIdpy\fR 15
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Specifies the connection to the X server.
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.IP \fIport\fR 15
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Defines the port to which the still is output'd.
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.IP \fId\fR 15
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Defines the drawable from which the still is to be captured.
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Pixmaps are currently not supported.
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.IP \fIgc\fR 15
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Defines the graphical context. GC components are:
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.I subwindow-mode,
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.I clip-x-origin,
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.I clip-y-origin,
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and
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.I clip-mask.
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.IP \fIvx,vy,vw,vh\fR 15
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Define the location and size of the destination video region
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into which the still is to be written. \fIvx\fP and \fIvy\fP define the
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.I x and
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.I y
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coordinates of the upper-left corner of the video region;
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.I vw and
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.I vh
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define the width and height, in pixels, of the video region.
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.IP \fIdx,dy,dw,dh\fR 15
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Define the location and size of the source drawable from which the
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still image is to be captured.
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.I dx and
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.I dy
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define the
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.I x and
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.I y
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coordinates of the upper-left corner of the drawable region;
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.I dw and
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.I dh
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define the width and height, in pixels, of the drawable region.
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.\"
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.SH Description
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.\"
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.PN XvGetStill
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captures a single frame of video from a drawable. The
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position and size of the destination (video) rectangle is specified by \fIvx,
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vy, vw\fR, and \fIvh\fR. The position and size of the
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source (drawable) rectangle is
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specified by \fIdx, dy, dw\fR, and \fIdh\fR.
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.PP
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Drawable data is clipped to the bounds of the drawable, scaled to the
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requested video region size (or the closest size supported) and
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clipped to the bounds of the video encoding. The contents of any region
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not updated with drawable data is undefined.
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.PP
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./" If the still is successfully captured an XvVideoNotify event with
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./" detail XvStill is generated for the drawable.
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./" [mhs]: Not in this universe
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If the port is grabbed
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by another client, this request is ignored, and an XvVideoNotify event
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with detail XvBusy is generated for the drawable.
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.SH Returned Values
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.IP [Success] 8
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Returned if XvGetStill(__libmansuffix__) completed successfully.
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.IP [XvBadExtension] 8
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Returned if the Xv extension is unavailable.
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.IP [XvBadAlloc] 8
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Returned if XvGetStill(__libmansuffix__) failed to allocate memory to process
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the request.
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.SH Diagnostics
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.IP [XvBadPort] 8
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Generated if the requested port does not exist.
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.IP [BadDrawable] 8
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Generated if the requested drawable does not exist.
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.IP [BadGC] 8
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Generated if the requested graphics context does not exist.
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.IP [BadAlloc] 8
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Generated if there were insufficient resources to process the request.
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.\"
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.SH See Also
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.\"
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XvPutStill(__libmansuffix__), XvGetVideo(__libmansuffix__), XvPutVideo(__libmansuffix__), XvVideoNotify(__libmansuffix__)
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.br
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