1 /*
2 * Copyright © 1998 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_DIX_CONFIG_H
24 #include <dix-config.h>
25 #endif
26
27 #include "fb.h"
28
29 void
fbPolyFillRect(DrawablePtr pDrawable,GCPtr pGC,int nrect,xRectangle * prect)30 fbPolyFillRect(DrawablePtr pDrawable, GCPtr pGC, int nrect, xRectangle *prect)
31 {
32 RegionPtr pClip = fbGetCompositeClip(pGC);
33 register BoxPtr pbox;
34 BoxPtr pextent;
35 int extentX1, extentX2, extentY1, extentY2;
36 int fullX1, fullX2, fullY1, fullY2;
37 int partX1, partX2, partY1, partY2;
38 int xorg, yorg;
39 int n;
40
41 xorg = pDrawable->x;
42 yorg = pDrawable->y;
43
44 pextent = RegionExtents(pClip);
45 extentX1 = pextent->x1;
46 extentY1 = pextent->y1;
47 extentX2 = pextent->x2;
48 extentY2 = pextent->y2;
49 while (nrect--) {
50 fullX1 = prect->x + xorg;
51 fullY1 = prect->y + yorg;
52 fullX2 = fullX1 + (int) prect->width;
53 fullY2 = fullY1 + (int) prect->height;
54 prect++;
55
56 if (fullX1 < extentX1)
57 fullX1 = extentX1;
58
59 if (fullY1 < extentY1)
60 fullY1 = extentY1;
61
62 if (fullX2 > extentX2)
63 fullX2 = extentX2;
64
65 if (fullY2 > extentY2)
66 fullY2 = extentY2;
67
68 if ((fullX1 >= fullX2) || (fullY1 >= fullY2))
69 continue;
70 n = RegionNumRects(pClip);
71 if (n == 1) {
72 fbFill(pDrawable,
73 pGC, fullX1, fullY1, fullX2 - fullX1, fullY2 - fullY1);
74 }
75 else {
76 pbox = RegionRects(pClip);
77 /*
78 * clip the rectangle to each box in the clip region
79 * this is logically equivalent to calling Intersect()
80 */
81 while (n--) {
82 partX1 = pbox->x1;
83 if (partX1 < fullX1)
84 partX1 = fullX1;
85 partY1 = pbox->y1;
86 if (partY1 < fullY1)
87 partY1 = fullY1;
88 partX2 = pbox->x2;
89 if (partX2 > fullX2)
90 partX2 = fullX2;
91 partY2 = pbox->y2;
92 if (partY2 > fullY2)
93 partY2 = fullY2;
94
95 pbox++;
96
97 if (partX1 < partX2 && partY1 < partY2)
98 fbFill(pDrawable, pGC,
99 partX1, partY1, partX2 - partX1, partY2 - partY1);
100 }
101 }
102 }
103 }
104