| 1 | /*
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| 2 | *
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| 3 | * Copyright © 2000 Keith Packard
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| 4 | *
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| 5 | * Permission to use, copy, modify, distribute, and sell this software and its
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| 6 | * documentation for any purpose is hereby granted without fee, provided that
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| 7 | * the above copyright notice appear in all copies and that both that
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| 8 | * copyright notice and this permission notice appear in supporting
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| 9 | * documentation, and that the name of Keith Packard not be used in
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| 10 | * advertising or publicity pertaining to distribution of the software without
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| 11 | * specific, written prior permission. Keith Packard makes no
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| 12 | * representations about the suitability of this software for any purpose. It
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| 13 | * is provided "as is" without express or implied warranty.
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| 14 | *
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| 15 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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| 16 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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| 17 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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| 18 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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| 19 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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| 20 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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| 21 | * PERFORMANCE OF THIS SOFTWARE.
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| 22 | */
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| 23 |
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| 24 | /*
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| 25 | * Thanks to Daniel Chemko <dchemko@intrinsyc.com> for making the 90 and 180
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| 26 | * orientations work.
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| 27 | */
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| 28 |
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| 29 | #ifdef HAVE_DIX_CONFIG_H
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| 30 | #include <dix-config.h>
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| 31 | #endif
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| 32 |
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| 33 | #include <stdlib.h>
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| 34 |
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| 35 | #include <X11/X.h>
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| 36 | #include "scrnintstr.h"
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| 37 | #include "windowstr.h"
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| 38 | #include <X11/fonts/font.h>
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| 39 | #include "dixfontstr.h"
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| 40 | #include <X11/fonts/fontstruct.h>
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| 41 | #include "mi.h"
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| 42 | #include "regionstr.h"
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| 43 | #include "globals.h"
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| 44 | #include "gcstruct.h"
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| 45 | #include "shadow.h"
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| 46 | #include "fb.h"
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| 47 |
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| 48 | #define DANDEBUG 0
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| 49 |
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| 50 | #if ROTATE == 270
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| 51 |
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| 52 | #define SCRLEFT(x,y,w,h) (pScreen->height - ((y) + (h)))
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| 53 | #define SCRY(x,y,w,h) (x)
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| 54 | #define SCRWIDTH(x,y,w,h) (h)
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| 55 | #define FIRSTSHA(x,y,w,h) (((y) + (h) - 1) * shaStride + (x))
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| 56 | #define STEPDOWN(x,y,w,h) ((w)--)
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| 57 | #define NEXTY(x,y,w,h) ((x)++)
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| 58 | #define SHASTEPX(stride) -(stride)
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| 59 | #define SHASTEPY(stride) (1)
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| 60 |
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| 61 | #elif ROTATE == 90
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| 62 |
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| 63 | #define SCRLEFT(x,y,w,h) (y)
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| 64 | #define SCRY(x,y,w,h) (pScreen->width - ((x) + (w)) - 1)
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| 65 | #define SCRWIDTH(x,y,w,h) (h)
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| 66 | #define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x + w - 1))
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| 67 | #define STEPDOWN(x,y,w,h) ((w)--)
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| 68 | #define NEXTY(x,y,w,h) ((void)(x))
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| 69 | #define SHASTEPX(stride) (stride)
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| 70 | #define SHASTEPY(stride) (-1)
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| 71 |
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| 72 | #elif ROTATE == 180
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| 73 |
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| 74 | #define SCRLEFT(x,y,w,h) (pScreen->width - ((x) + (w)))
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| 75 | #define SCRY(x,y,w,h) (pScreen->height - ((y) + (h)) - 1)
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| 76 | #define SCRWIDTH(x,y,w,h) (w)
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| 77 | #define FIRSTSHA(x,y,w,h) ((y + h - 1) * shaStride + (x + w - 1))
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| 78 | #define STEPDOWN(x,y,w,h) ((h)--)
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| 79 | #define NEXTY(x,y,w,h) ((void)(y))
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| 80 | #define SHASTEPX(stride) (-1)
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| 81 | #define SHASTEPY(stride) -(stride)
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| 82 |
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| 83 | #else
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| 84 |
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| 85 | #define SCRLEFT(x,y,w,h) (x)
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| 86 | #define SCRY(x,y,w,h) (y)
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| 87 | #define SCRWIDTH(x,y,w,h) (w)
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| 88 | #define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x))
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| 89 | #define STEPDOWN(x,y,w,h) ((h)--)
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| 90 | #define NEXTY(x,y,w,h) ((y)++)
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| 91 | #define SHASTEPX(stride) (1)
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| 92 | #define SHASTEPY(stride) (stride)
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| 93 |
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| 94 | #endif
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| 95 |
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| 96 | void
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| 97 | FUNC(ScreenPtr pScreen, shadowBufPtr pBuf)
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| 98 | {
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| 99 | RegionPtr damage = shadowDamage(pBuf);
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| 100 | PixmapPtr pShadow = pBuf->pPixmap;
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| 101 | int nbox = RegionNumRects(damage);
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| 102 | BoxPtr pbox = RegionRects(damage);
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| 103 | FbBits *shaBits;
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| 104 | Data *shaBase, *shaLine, *sha;
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| 105 | FbStride shaStride;
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| 106 | int scrBase, scrLine, scr;
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| 107 | int shaBpp;
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| 108 | _X_UNUSED int shaXoff, shaYoff;
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| 109 | int x, y, w, h, width;
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| 110 | int i;
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| 111 | Data *winBase = NULL, *win;
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| 112 | CARD32 winSize;
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| 113 |
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| 114 | fbGetDrawable(&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff,
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| 115 | shaYoff);
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| 116 | shaBase = (Data *) shaBits;
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| 117 | shaStride = shaStride * sizeof(FbBits) / sizeof(Data);
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| 118 | #if (DANDEBUG > 1)
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| 119 | ErrorF
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| 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",
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| 121 | pShadow, pScreen, damage, shaStride, shaBase, shaBpp);
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| 122 | #endif
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| 123 | while (nbox--) {
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| 124 | x = pbox->x1;
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| 125 | y = pbox->y1;
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| 126 | w = (pbox->x2 - pbox->x1);
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| 127 | h = pbox->y2 - pbox->y1;
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| 128 |
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| 129 | #if (DANDEBUG > 2)
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| 130 | ErrorF
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| 131 | (" |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n",
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| 132 | x, y, w, h);
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| 133 | #endif
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| 134 | scrLine = SCRLEFT(x, y, w, h);
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| 135 | shaLine = shaBase + FIRSTSHA(x, y, w, h);
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| 136 |
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| 137 | while (STEPDOWN(x, y, w, h)) {
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| 138 | winSize = 0;
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| 139 | scrBase = 0;
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| 140 | width = SCRWIDTH(x, y, w, h);
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| 141 | scr = scrLine;
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| 142 | sha = shaLine;
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| 143 | #if (DANDEBUG > 3)
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| 144 | ErrorF(" | |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n",
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| 145 | width, scr, sha);
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| 146 | #endif
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| 147 | while (width) {
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| 148 | /* how much remains in this window */
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| 149 | i = scrBase + winSize - scr;
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| 150 | if (i <= 0 || scr < scrBase) {
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| 151 | winBase = (Data *) (*pBuf->window) (pScreen,
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| 152 | SCRY(x, y, w, h),
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| 153 | scr * sizeof(Data),
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| 154 | SHADOW_WINDOW_WRITE,
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| 155 | &winSize,
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| 156 | pBuf->closure);
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| 157 | if (!winBase)
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| 158 | return;
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| 159 | scrBase = scr;
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| 160 | winSize /= sizeof(Data);
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| 161 | i = winSize;
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| 162 | #if(DANDEBUG > 4)
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| 163 | ErrorF
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| 164 | (" | | |-> Starting New Line - Metrics: winBase=%x, scrBase=%x, winSize=%d\r\n | | | Xstride=%d, Ystride=%d, w=%d h=%d\n",
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| 165 | winBase, scrBase, winSize, SHASTEPX(shaStride),
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| 166 | SHASTEPY(shaStride), w, h);
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| 167 | #endif
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| 168 | }
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| 169 | win = winBase + (scr - scrBase);
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| 170 | if (i > width)
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| 171 | i = width;
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| 172 | width -= i;
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| 173 | scr += i;
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| 174 | #if(DANDEBUG > 5)
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| 175 | ErrorF
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| 176 | (" | | |-> Writing Line - Metrics: win=%x, sha=%x\n",
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| 177 | win, sha);
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| 178 | #endif
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| 179 | while (i--) {
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| 180 | #if(DANDEBUG > 6)
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| 181 | ErrorF
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| 182 | (" | | |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n",
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| 183 | win, sha, i);
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| 184 | #endif
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| 185 | *win++ = *sha;
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| 186 | sha += SHASTEPX(shaStride);
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| 187 | } /* i */
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| 188 | } /* width */
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| 189 | shaLine += SHASTEPY(shaStride);
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| 190 | NEXTY(x, y, w, h);
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| 191 | } /* STEPDOWN */
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| 192 | pbox++;
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| 193 | } /* nbox */
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| 194 | }
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