1/*
2 * Copyright © 2004 Philip Blundell
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 Philip Blundell not be used in
9 * advertising or publicity pertaining to distribution of the software without
10 * specific, written prior permission.  Philip Blundell 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 * PHILIP BLUNDELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL PHILIP BLUNDELL 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#include    <X11/X.h>
24#include    "scrnintstr.h"
25#include    "windowstr.h"
26#include    "dixfontstr.h"
27#include    "mi.h"
28#include    "regionstr.h"
29#include    "globals.h"
30#include    "gcstruct.h"
31#include    "shadow.h"
32#include    "fb.h"
33
34#if ROTATE == 270
35
36#define WINSTEPX(stride)    (stride)
37#define WINSTART(x,y)       (((pScreen->height - 1) - y) + (x * winStride))
38#define WINSTEPY()	    -1
39
40#elif ROTATE == 90
41
42#define WINSTEPX(stride)    (-stride)
43#define WINSTEPY()	    1
44#define WINSTART(x,y)       (((pScreen->width - 1 - x) * winStride) + y)
45
46#else
47
48#error This rotation is not supported here
49
50#endif
51
52#ifdef __arm__
53#define PREFETCH
54#endif
55
56void
57FUNC(ScreenPtr pScreen, shadowBufPtr pBuf)
58{
59    RegionPtr damage = DamageRegion(pBuf->pDamage);
60    PixmapPtr pShadow = pBuf->pPixmap;
61    int nbox = RegionNumRects(damage);
62    BoxPtr pbox = RegionRects(damage);
63    FbBits *shaBits;
64    Data *shaBase, *shaLine, *sha;
65    FbStride shaStride, winStride;
66    int shaBpp;
67    _X_UNUSED int shaXoff, shaYoff;
68    int x, y, w, h;
69    Data *winBase, *win, *winLine;
70    CARD32 winSize;
71
72    fbGetDrawable(&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff,
73                  shaYoff);
74    shaBase = (Data *) shaBits;
75    shaStride = shaStride * sizeof(FbBits) / sizeof(Data);
76
77    winBase = (Data *) (*pBuf->window) (pScreen, 0, 0,
78                                        SHADOW_WINDOW_WRITE,
79                                        &winSize, pBuf->closure);
80    winStride = (Data *) (*pBuf->window) (pScreen, 1, 0,
81                                          SHADOW_WINDOW_WRITE,
82                                          &winSize, pBuf->closure) - winBase;
83
84    while (nbox--) {
85        x = pbox->x1;
86        y = pbox->y1;
87        w = (pbox->x2 - pbox->x1);
88        h = pbox->y2 - pbox->y1;
89
90        shaLine = shaBase + (y * shaStride) + x;
91#ifdef PREFETCH
92        __builtin_prefetch(shaLine);
93#endif
94        winLine = winBase + WINSTART(x, y);
95
96        while (h--) {
97            sha = shaLine;
98            win = winLine;
99
100            while (sha < (shaLine + w - 16)) {
101#ifdef PREFETCH
102                __builtin_prefetch(sha + shaStride);
103#endif
104                *win = *sha++;
105                win += WINSTEPX(winStride);
106                *win = *sha++;
107                win += WINSTEPX(winStride);
108                *win = *sha++;
109                win += WINSTEPX(winStride);
110                *win = *sha++;
111                win += WINSTEPX(winStride);
112
113                *win = *sha++;
114                win += WINSTEPX(winStride);
115                *win = *sha++;
116                win += WINSTEPX(winStride);
117                *win = *sha++;
118                win += WINSTEPX(winStride);
119                *win = *sha++;
120                win += WINSTEPX(winStride);
121
122                *win = *sha++;
123                win += WINSTEPX(winStride);
124                *win = *sha++;
125                win += WINSTEPX(winStride);
126                *win = *sha++;
127                win += WINSTEPX(winStride);
128                *win = *sha++;
129                win += WINSTEPX(winStride);
130
131                *win = *sha++;
132                win += WINSTEPX(winStride);
133                *win = *sha++;
134                win += WINSTEPX(winStride);
135                *win = *sha++;
136                win += WINSTEPX(winStride);
137                *win = *sha++;
138                win += WINSTEPX(winStride);
139            }
140
141            while (sha < (shaLine + w)) {
142                *win = *sha++;
143                win += WINSTEPX(winStride);
144            }
145
146            y++;
147            shaLine += shaStride;
148            winLine += WINSTEPY();
149        }
150        pbox++;
151    }                           /*  nbox */
152}
153