| 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 | #ifdef HAVE_DIX_CONFIG_H |
| 25 | #include <dix-config.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include <X11/X.h> |
| 31 | #include "scrnintstr.h" |
| 32 | #include "windowstr.h" |
| 33 | #include <X11/fonts/font.h> |
| 34 | #include "dixfontstr.h" |
| 35 | #include <X11/fonts/fontstruct.h> |
| 36 | #include "mi.h" |
| 37 | #include "regionstr.h" |
| 38 | #include "globals.h" |
| 39 | #include "gcstruct.h" |
| 40 | #include "shadow.h" |
| 41 | #include "fb.h" |
| 42 | |
| 43 | /* |
| 44 | * 32 4-bit pixels per write |
| 45 | */ |
| 46 | |
| 47 | #define PL_SHIFT 7 |
| 48 | #define PL_UNIT (1 << PL_SHIFT) |
| 49 | #define PL_MASK (PL_UNIT - 1) |
| 50 | |
| 51 | /* |
| 52 | * 32->8 conversion: |
| 53 | * |
| 54 | * 7 6 5 4 3 2 1 0 |
| 55 | * A B C D E F G H |
| 56 | * |
| 57 | * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 |
| 58 | * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 |
| 59 | * m . . . H . . . G . . . F . . . E . . . D . . . C . . . B . . . A |
| 60 | * m1 G . . . F . . . E . . . D . . . C . . . B . . . A . . . . . . . m << (7 - (p)) |
| 61 | * m2 . H . . . G . . . F . . . E . . . D . . . C . . . B . . . A . . (m >> (p)) << 2 |
| 62 | * m3 G E C A m1 & 0x80808080 |
| 63 | * m4 H F D B m2 & 0x40404040 |
| 64 | * m5 G H E F C D A B m3 | m4 |
| 65 | * m6 G H E F C D G H A B E F m5 | (m5 >> 20) |
| 66 | * m7 G H E F C D G H A B C D E F G H m6 | (m6 >> 10) |
| 67 | */ |
| 68 | |
| 69 | #if 0 |
| 70 | #define GetBits(p,o,d) {\ |
| 71 | m = sha[o]; \ |
| 72 | m1 = m << (7 - (p)); \ |
| 73 | m2 = (m >> (p)) << 2; \ |
| 74 | m3 = m1 & 0x80808080; \ |
| 75 | m4 = m2 & 0x40404040; \ |
| 76 | m5 = m3 | m4; \ |
| 77 | m6 = m5 | (m5 >> 20); \ |
| 78 | d = m6 | (m6 >> 10); \ |
| 79 | } |
| 80 | #else |
| 81 | #define GetBits(p,o,d) {\ |
| 82 | m = sha[o]; \ |
| 83 | m5 = ((m << (7 - (p))) & 0x80808080) | (((m >> (p)) << 2) & 0x40404040); \ |
| 84 | m6 = m5 | (m5 >> 20); \ |
| 85 | d = m6 | (m6 >> 10); \ |
| 86 | } |
| 87 | #endif |
| 88 | |
| 89 | void |
| 90 | shadowUpdatePlanar4(ScreenPtr pScreen, shadowBufPtr pBuf) |
| 91 | { |
| 92 | RegionPtr damage = shadowDamage(pBuf); |
| 93 | PixmapPtr pShadow = pBuf->pPixmap; |
| 94 | int nbox = RegionNumRects(damage); |
| 95 | BoxPtr pbox = RegionRects(damage); |
| 96 | CARD32 *shaBase, *shaLine, *sha; |
| 97 | FbStride shaStride; |
| 98 | int scrBase, scrLine, scr; |
| 99 | int shaBpp; |
| 100 | _X_UNUSED int shaXoff, shaYoff; |
| 101 | int x, y, w, h, width; |
| 102 | int i; |
| 103 | CARD32 *winBase = NULL, *win; |
| 104 | CARD32 winSize; |
| 105 | int plane; |
| 106 | CARD32 m, m5, m6; |
| 107 | CARD8 s1, s2, s3, s4; |
| 108 | |
| 109 | fbGetStipDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff, |
| 110 | shaYoff); |
| 111 | while (nbox--) { |
| 112 | x = (pbox->x1) * shaBpp; |
| 113 | y = (pbox->y1); |
| 114 | w = (pbox->x2 - pbox->x1) * shaBpp; |
| 115 | h = pbox->y2 - pbox->y1; |
| 116 | |
| 117 | w = (w + (x & PL_MASK) + PL_MASK) >> PL_SHIFT; |
| 118 | x &= ~PL_MASK; |
| 119 | |
| 120 | scrLine = (x >> PL_SHIFT); |
| 121 | shaLine = shaBase + y * shaStride + (x >> FB_SHIFT); |
| 122 | |
| 123 | while (h--) { |
| 124 | for (plane = 0; plane < 4; plane++) { |
| 125 | width = w; |
| 126 | scr = scrLine; |
| 127 | sha = shaLine; |
| 128 | winSize = 0; |
| 129 | scrBase = 0; |
| 130 | while (width) { |
| 131 | /* how much remains in this window */ |
| 132 | i = scrBase + winSize - scr; |
| 133 | if (i <= 0 || scr < scrBase) { |
| 134 | winBase = (CARD32 *) (*pBuf->window) (pScreen, |
| 135 | y, |
| 136 | (scr << 4) | |
| 137 | (plane), |
| 138 | SHADOW_WINDOW_WRITE, |
| 139 | &winSize, |
| 140 | pBuf->closure); |
| 141 | if (!winBase) |
| 142 | return; |
| 143 | winSize >>= 2; |
| 144 | scrBase = scr; |
| 145 | i = winSize; |
| 146 | } |
| 147 | win = winBase + (scr - scrBase); |
| 148 | if (i > width) |
| 149 | i = width; |
| 150 | width -= i; |
| 151 | scr += i; |
| 152 | |
| 153 | while (i--) { |
| 154 | GetBits(plane, 0, s1); |
| 155 | GetBits(plane, 1, s2); |
| 156 | GetBits(plane, 2, s3); |
| 157 | GetBits(plane, 3, s4); |
| 158 | *win++ = s1 | (s2 << 8) | (s3 << 16) | (s4 << 24); |
| 159 | sha += 4; |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | shaLine += shaStride; |
| 164 | y++; |
| 165 | } |
| 166 | pbox++; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | shadowUpdateProc |
| 171 | shadowUpdatePlanar4Weak(void) |
| 172 | { |
| 173 | return shadowUpdatePlanar4; |
| 174 | } |
| 175 | |
| 176 | shadowUpdateProc |
| 177 | shadowUpdatePlanar4x8Weak(void) |
| 178 | { |
| 179 | return shadowUpdatePlanar4x8; |
| 180 | } |