1 /*
2 *
3 * Copyright © 2000 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 /*
25 * Thanks to Daniel Chemko <dchemko@intrinsyc.com> for making the 90 and 180
26 * orientations work.
27 */
28
29 #ifdef HAVE_DIX_CONFIG_H
30 #include <dix-config.h>
31 #endif
32
33 #include <stdlib.h>
34
35 #include <X11/X.h>
36 #include "scrnintstr.h"
37 #include "windowstr.h"
38 #include <X11/fonts/font.h>
39 #include "dixfontstr.h"
40 #include <X11/fonts/fontstruct.h>
41 #include "mi.h"
42 #include "regionstr.h"
43 #include "globals.h"
44 #include "gcstruct.h"
45 #include "shadow.h"
46 #include "fb.h"
47
48 #define DANDEBUG 0
49
50 #if ROTATE == 270
51
52 #define SCRLEFT(x,y,w,h) (pScreen->height - ((y) + (h)))
53 #define SCRY(x,y,w,h) (x)
54 #define SCRWIDTH(x,y,w,h) (h)
55 #define FIRSTSHA(x,y,w,h) (((y) + (h) - 1) * shaStride + (x))
56 #define STEPDOWN(x,y,w,h) ((w)--)
57 #define NEXTY(x,y,w,h) ((x)++)
58 #define SHASTEPX(stride) -(stride)
59 #define SHASTEPY(stride) (1)
60
61 #elif ROTATE == 90
62
63 #define SCRLEFT(x,y,w,h) (y)
64 #define SCRY(x,y,w,h) (pScreen->width - ((x) + (w)) - 1)
65 #define SCRWIDTH(x,y,w,h) (h)
66 #define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x + w - 1))
67 #define STEPDOWN(x,y,w,h) ((w)--)
68 #define NEXTY(x,y,w,h) ((void)(x))
69 #define SHASTEPX(stride) (stride)
70 #define SHASTEPY(stride) (-1)
71
72 #elif ROTATE == 180
73
74 #define SCRLEFT(x,y,w,h) (pScreen->width - ((x) + (w)))
75 #define SCRY(x,y,w,h) (pScreen->height - ((y) + (h)) - 1)
76 #define SCRWIDTH(x,y,w,h) (w)
77 #define FIRSTSHA(x,y,w,h) ((y + h - 1) * shaStride + (x + w - 1))
78 #define STEPDOWN(x,y,w,h) ((h)--)
79 #define NEXTY(x,y,w,h) ((void)(y))
80 #define SHASTEPX(stride) (-1)
81 #define SHASTEPY(stride) -(stride)
82
83 #else
84
85 #define SCRLEFT(x,y,w,h) (x)
86 #define SCRY(x,y,w,h) (y)
87 #define SCRWIDTH(x,y,w,h) (w)
88 #define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x))
89 #define STEPDOWN(x,y,w,h) ((h)--)
90 #define NEXTY(x,y,w,h) ((y)++)
91 #define SHASTEPX(stride) (1)
92 #define SHASTEPY(stride) (stride)
93
94 #endif
95
96 void
FUNC(ScreenPtr pScreen,shadowBufPtr pBuf)97 FUNC(ScreenPtr pScreen, shadowBufPtr pBuf)
98 {
99 RegionPtr damage = DamageRegion(pBuf->pDamage);
100 PixmapPtr pShadow = pBuf->pPixmap;
101 int nbox = RegionNumRects(damage);
102 BoxPtr pbox = RegionRects(damage);
103 FbBits *shaBits;
104 Data *shaBase, *shaLine, *sha;
105 FbStride shaStride;
106 int scrBase, scrLine, scr;
107 int shaBpp;
108 _X_UNUSED int shaXoff, shaYoff;
109 int x, y, w, h, width;
110 int i;
111 Data *winBase = NULL, *win;
112 CARD32 winSize;
113
114 fbGetDrawable(&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff,
115 shaYoff);
116 shaBase = (Data *) shaBits;
117 shaStride = shaStride * sizeof(FbBits) / sizeof(Data);
118 #if (DANDEBUG > 1)
119 ErrorF
120 ("-> Entering Shadow Update:\r\n |- Origins: pShadow=%x, pScreen=%x, damage=%x\r\n |- Metrics: shaStride=%d, shaBase=%x, shaBpp=%d\r\n | \n",
121 pShadow, pScreen, damage, shaStride, shaBase, shaBpp);
122 #endif
123 while (nbox--) {
124 x = pbox->x1;
125 y = pbox->y1;
126 w = (pbox->x2 - pbox->x1);
127 h = pbox->y2 - pbox->y1;
128
129 #if (DANDEBUG > 2)
130 ErrorF
131 (" |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n",
132 x, y, w, h);
133 #endif
134 scrLine = SCRLEFT(x, y, w, h);
135 shaLine = shaBase + FIRSTSHA(x, y, w, h);
136
137 while (STEPDOWN(x, y, w, h)) {
138 winSize = 0;
139 scrBase = 0;
140 width = SCRWIDTH(x, y, w, h);
141 scr = scrLine;
142 sha = shaLine;
143 #if (DANDEBUG > 3)
144 ErrorF(" | |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n",
145 width, scr, sha);
146 #endif
147 while (width) {
148 /* how much remains in this window */
149 i = scrBase + winSize - scr;
150 if (i <= 0 || scr < scrBase) {
151 winBase = (Data *) (*pBuf->window) (pScreen,
152 SCRY(x, y, w, h),
153 scr * sizeof(Data),
154 SHADOW_WINDOW_WRITE,
155 &winSize,
156 pBuf->closure);
157 if (!winBase)
158 return;
159 scrBase = scr;
160 winSize /= sizeof(Data);
161 i = winSize;
162 #if(DANDEBUG > 4)
163 ErrorF
164 (" | | |-> Starting New Line - Metrics: winBase=%x, scrBase=%x, winSize=%d\r\n | | | Xstride=%d, Ystride=%d, w=%d h=%d\n",
165 winBase, scrBase, winSize, SHASTEPX(shaStride),
166 SHASTEPY(shaStride), w, h);
167 #endif
168 }
169 win = winBase + (scr - scrBase);
170 if (i > width)
171 i = width;
172 width -= i;
173 scr += i;
174 #if(DANDEBUG > 5)
175 ErrorF
176 (" | | |-> Writing Line - Metrics: win=%x, sha=%x\n",
177 win, sha);
178 #endif
179 while (i--) {
180 #if(DANDEBUG > 6)
181 ErrorF
182 (" | | |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n",
183 win, sha, i);
184 #endif
185 *win++ = *sha;
186 sha += SHASTEPX(shaStride);
187 } /* i */
188 } /* width */
189 shaLine += SHASTEPY(shaStride);
190 NEXTY(x, y, w, h);
191 } /* STEPDOWN */
192 pbox++;
193 } /* nbox */
194 }
195