AddTrap.c revision e5410a46 
1/*
2 * Copyright © 2004 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of Keith Packard not be used in
9 * advertising or publicity pertaining to distribution of the software without
10 * specific, written prior permission.  Keith Packard makes no
11 * representations about the suitability of this software for any purpose.  It
12 * is provided "as is" without express or implied warranty.
13 *
14 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20 * PERFORMANCE OF THIS SOFTWARE.
21 */
22
23#ifdef HAVE_CONFIG_H
24#include <config.h>
25#endif
26#include "Xrenderint.h"
27
28#define NLOCAL	256
29
30void
31XRenderAddTraps (Display	    *dpy,
32		 Picture	    picture,
33		 int		    xOff,
34		 int		    yOff,
35		 _Xconst XTrap	    *traps,
36		 int		    ntrap)
37{
38    XRenderExtDisplayInfo   *info = XRenderFindDisplay (dpy);
39    xRenderAddTrapsReq	    *req;
40    int			    n;
41    long    		    len;
42    unsigned long	    max_req = dpy->bigreq_size ? dpy->bigreq_size : dpy->max_request_size;
43
44    RenderSimpleCheckExtension (dpy, info);
45    LockDisplay(dpy);
46    while (ntrap)
47    {
48	GetReq(RenderAddTraps, req);
49	req->reqType = info->codes->major_opcode;
50	req->renderReqType = X_RenderAddTraps;
51	req->picture = picture;
52	req->xOff = xOff;
53	req->yOff = yOff;
54	n = ntrap;
55	len = ((long) n) * (SIZEOF (xTrap) >> 2);
56	if (len > (max_req - req->length)) {
57	    n = (max_req - req->length) / (SIZEOF (xTrap) >> 2);
58	    len = ((long)n) * (SIZEOF (xTrap) >> 2);
59	}
60	SetReqLen (req, len, len);
61	len <<= 2;
62	DataInt32 (dpy, (int *) traps, len);
63	ntrap -= n;
64	traps += n;
65    }
66    UnlockDisplay(dpy);
67    SyncHandle();
68}
69