Trap.c revision d21ab8bc 
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    unsigned long	    max_req = dpy->bigreq_size ? dpy->bigreq_size : dpy->max_request_size;
42
43    RenderSimpleCheckExtension (dpy, info);
44    LockDisplay(dpy);
45    while (ntrap)
46    {
47	xRenderTrapezoidsReq	*req;
48	int			n;
49	unsigned long		len;
50
51	GetReq(RenderTrapezoids, req);
52	req->reqType = (CARD8) info->codes->major_opcode;
53	req->renderReqType = X_RenderTrapezoids;
54	req->op = (CARD8) op;
55	req->src = (CARD32) src;
56	req->dst = (CARD32) dst;
57	req->maskFormat = (CARD32) (maskFormat ? maskFormat->id : 0);
58	req->xSrc = (INT16) xSrc;
59	req->ySrc = (INT16) ySrc;
60	n = ntrap;
61	len = ((unsigned long) n) * (SIZEOF (xTrapezoid) >> 2);
62	if (len > (max_req - req->length)) {
63	    n = (int) ((max_req - req->length) / (SIZEOF (xTrapezoid) >> 2));
64	    len = ((unsigned long) n) * (SIZEOF (xTrapezoid) >> 2);
65	}
66	SetReqLen (req, len, len);
67	len <<= 2;
68	DataInt32 (dpy, (_Xconst int *) traps, len);
69	ntrap -= n;
70	traps += n;
71    }
72    UnlockDisplay(dpy);
73    SyncHandle();
74}
75
76