Name
XvPutStill - write a single frame of video to a drawable
Syntax
#include
XXvvPPuuttSSttiillll((_d_p_y_, _p_o_r_t_, _d_, _g_c_, _v_x_, _v_y_, _v_w_, _v_h_, _d_x_, _d_y_, _d_w_, _d_h)
Display
*dpy;
XvPortID
port;
Drawable
d;
GC
gc;
int
vx,
vy,
dx,
dy;
unsigned int
vw,
vh;
unsigned int
dw,
dh;
Arguments
-
_d_p_y
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 display 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.
-
_p_o_r_t
Defines the port from which to get the still.
-
-
_d
Defines the drawable into which the still is to be written.
-
Pixmaps are currently not supported.
-
_g_c
Defines the graphical context.
-
GC components are:
subwindow-mode,
clip-x-origin,
clip-y-origin,
and
clip-mask.
-
_v_x_,_v_y_,_v_w_,_v_h
Define the location and size of the video region
-
to be written. _v_x and _v_y define the
upper-left pixel of the region. _v_w and _v_h
define the width and height, in pixels, of the region.
-
_d_x_,_d_y_,_d_w_,_d_h
Define the location and size of the destination region into which the
-
still image is written. _d_x and _d_y define the upper-left
corner of the region. _d_w and _d_h
define the width and height, in pixels, of the region.
Description
XvPutStill(3X) writes a single frame of video to a drawable.
The position and size of the source (video) rectangle is specified by _v_x_,
_v_y_, _v_w, and _v_h. The position and size of the destination (drawable)
rectangle is specified by _d_x_, _d_y_, _d_w, and _d_h.
Video data is clipped to the bounds of the video encoding, scaled to the
requested drawable region size (or the closest size supported) and
clipped to the bounds of the drawable.
If the port is grabbed by another client, this request is ignored, and
an XvVideoNotify event with detail XvBusy is generated for the
drawable. If the port is not receiving a valid video signal a
VideoNotify event with detail XvHardError is generated for the drawable.
Returned Values
-
[Success]
Returned if XvPutStill(3X) completed successfully.
-
-
[XvBadExtension]
Returned if the Xv extension is unavailable.
-
-
[XvBadAlloc]
Returned if XvGetStill(3X) failed to allocate memory to process
-
the request.
Diagnostics
-
[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.
-
See Also
XvPutVideo(3X), XvGetStill(3X), XvVideoNotify(3X)