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);
ARGUMENTS
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.
DESCRIPTION
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.
If the port is grabbed
by another client, this request is ignored, and an XvVideoNotify event
with detail XvBusy is generated for the drawable.