1XvGetStill(3) libXv Functions XvGetStill(3)
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6 XvGetStill - capture a single frame of video from a drawable
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9 #include <X11/extensions/Xvlib.h>
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11 int XvGetStill(Display *dpy, XvPortID port, Drawable d, GC gc,
12 int vx, int vy, unsigned int vw, unsigned int vh,
13 int dx, int dy, unsigned int dw, unsigned int dh);
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16 dpy Specifies the connection to the X server.
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18 port Defines the port to which the still is output.
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20 d Defines the drawable from which the still is to be cap‐
21 tured. Pixmaps are currently not supported.
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23 gc Defines the graphical context. GC components are: sub‐
24 window-mode, clip-x-origin, clip-y-origin, and clip-
25 mask.
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27 vx,vy,vw,vh Define the location and size of the destination video
28 region into which the still is to be written. vx and vy
29 define the xand y coordinates of the upper-left corner
30 of the video region; vwand vh define the width and
31 height, in pixels, of the video region.
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33 dx,dy,dw,dh Define the location and size of the source drawable from
34 which the still image is to be captured. dxand dy
35 define the xand y coordinates of the upper-left corner
36 of the drawable region; dwand dh define the width and
37 height, in pixels, of the drawable region.
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40 captures a single frame of video from a drawable. The position and
41 size of the destination (video) rectangle is specified by vx, vy, vw,
42 and vh. The position and size of the source (drawable) rectangle is
43 specified by dx, dy, dw, and dh.
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45 Drawable data is clipped to the bounds of the drawable, scaled to the
46 requested video region size (or the closest size supported) and clipped
47 to the bounds of the video encoding. The contents of any region not
48 updated with drawable data is undefined.
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50 If the port is grabbed by another client, this request is ignored, and
51 an XvVideoNotify event with detail XvBusy is generated for the draw‐
52 able.
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55 [Success]
56 Returned if XvGetStill(3) completed successfully.
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58 [XvBadExtension]
59 Returned if the Xv extension is unavailable.
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61 [XvBadAlloc]
62 Returned if XvGetStill(3) failed to allocate memory to process
63 the request.
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66 [XvBadPort]
67 Generated if the requested port does not exist.
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69 [BadDrawable]
70 Generated if the requested drawable does not exist.
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72 [BadGC] Generated if the requested graphics context does not exist.
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74 [BadAlloc]
75 Generated if there were insufficient resources to process the
76 request.
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79 XvPutStill(3), XvGetVideo(3), XvPutVideo(3), XvVideoNotify(3)
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84X Version 11 libXv 1.0.11 XvGetStill(3)