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XvGetStill - capture a single frame of video from a drawable
#include
<X11/extensions/Xvlib.h>
int 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);
- dpy
- Specifies the connection to the X server.
- port
- Defines the port
to which the still is output.
- 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 xand
y coordinates of the upper-left corner of the video region; vwand 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. dxand dy define the xand y coordinates of the upper-left
corner of the drawable region; dwand dh define the width and height, in
pixels, of the drawable region.
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.
- [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.
- [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.
XvPutStill(3)
,
XvGetVideo(3)
, XvPutVideo(3)
, XvVideoNotify(3)
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