XvGetStill - capture a single frame of video from a drawable
XvGetStill(dpy, port, d, gc, vx, vy, vw, vh, dx, dy, dw, dh)
register Display *dpy;
int vx, vy, dx, dy;
unsigned int vw, vh;
unsigned int dw, dh;
dpy Specifies the display screen on which the Xv Server is to accept requests
from Xv clients. If the display option is not specified, Xv uses the dis-
play screen specified by your DISPLAY environment variable. The display
option has the format hostname:number. Using two colons (::) instead of
one (:) indicates that DECnet is to be used for transport.
port Defines the port to which the still is outputed.
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 and y coordinates of the
upper-left corner of the video region; vw and 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. dx and dy define the x and y coordinates of the
upper-left corner of the drawable region; dw and 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 destina-
tion (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 encod-
ing. 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.
Returned if XvGetStill(3X) completed successfully.
Returned if the Xv extension is unavailable.
Returned if XvGetStill(3X) failed to allocate memory to process the request.
Generated if the requested port does not exist.
Generated if the requested drawable does not exist.
[BadGC] Generated if the requested graphics context does not exist.
Generated if there were insufficient resources to process the request.
XvPutStill(3X), XvGetVideo(3X), XvPutVideo(3X), XvVideoNotify(3X)
XFree86 Version Version 4.3.0 XvGetStill(3X)