register Display *dpy; XvPortID port; Drawable d; GC gc; int vx, vy, dx, dy; unsigned int vw, vh; unsigned int dw, dh;
Arguments
dpy
Specifies the connection to the X server.
port
Defines the port to which the still is output'd.
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
x andy
coordinates of the upper-left corner of the video region;
vw andvh
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.
dx anddy
define the
x andy
coordinates of the upper-left corner of the drawable region;
dw and 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.
