Trap.c revision 1f0ac6a5 
1/*
2 *
3 * Copyright © 2002 Keith Packard
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of Keith Packard not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission.  Keith Packard makes no
12 * representations about the suitability of this software for any purpose.  It
13 * is provided "as is" without express or implied warranty.
14 *
15 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
22 */
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27#include "Xrenderint.h"
28
29void
30XRenderCompositeTrapezoids (Display		*dpy,
31			    int			op,
32			    Picture		src,
33			    Picture		dst,
34			    _Xconst XRenderPictFormat	*maskFormat,
35			    int			xSrc,
36			    int			ySrc,
37			    _Xconst XTrapezoid	*traps,
38			    int			ntrap)
39{
40    XRenderExtDisplayInfo         *info = XRenderFindDisplay (dpy);
41    xRenderTrapezoidsReq    *req;
42    int			    n;
43    long    		    len;
44    unsigned long	    max_req = dpy->bigreq_size ? dpy->bigreq_size : dpy->max_request_size;
45
46    RenderSimpleCheckExtension (dpy, info);
47    LockDisplay(dpy);
48    while (ntrap)
49    {
50	GetReq(RenderTrapezoids, req);
51	req->reqType = info->codes->major_opcode;
52	req->renderReqType = X_RenderTrapezoids;
53	req->op = (CARD8) op;
54	req->src = src;
55	req->dst = dst;
56	req->maskFormat = maskFormat ? maskFormat->id : 0;
57	req->xSrc = xSrc;
58	req->ySrc = ySrc;
59	n = ntrap;
60	len = ((long) n) * (SIZEOF (xTrapezoid) >> 2);
61	if (len > (max_req - req->length)) {
62	    n = (max_req - req->length) / (SIZEOF (xTrapezoid) >> 2);
63	    len = ((long)n) * (SIZEOF (xTrapezoid) >> 2);
64	}
65	SetReqLen (req, len, len);
66	len <<= 2;
67	DataInt32 (dpy, (int *) traps, len);
68	ntrap -= n;
69	traps += n;
70    }
71    UnlockDisplay(dpy);
72    SyncHandle();
73}
74
75