| 1 | /*
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| 2 | * $XFree86: xc/programs/Xserver/miext/shadow/shrotpack.h,v 1.3 2001/05/29 04:54:13 keithp Exp $
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| 3 | *
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| 4 | * Copyright © 2000 Keith Packard
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| 5 | *
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| 6 | * Permission to use, copy, modify, distribute, and sell this software and its
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| 7 | * documentation for any purpose is hereby granted without fee, provided that
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| 8 | * the above copyright notice appear in all copies and that both that
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| 9 | * copyright notice and this permission notice appear in supporting
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| 10 | * documentation, and that the name of Keith Packard not be used in
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| 11 | * advertising or publicity pertaining to distribution of the software without
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| 12 | * specific, written prior permission. Keith Packard makes no
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| 13 | * representations about the suitability of this software for any purpose. It
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| 14 | * is provided "as is" without express or implied warranty.
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| 15 | *
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| 16 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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| 17 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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| 18 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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| 19 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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| 20 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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| 21 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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| 22 | * PERFORMANCE OF THIS SOFTWARE.
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| 23 | */
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| 24 |
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| 25 | /*
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| 26 | * Thanks to Daniel Chemko <[email protected]> for making the 90 and 180
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| 27 | * orientations work.
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| 28 | */
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| 29 |
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| 30 | #ifdef HAVE_DIX_CONFIG_H
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| 31 | #include <dix-config.h>
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| 32 | #endif
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| 33 |
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| 34 | #include <stdlib.h>
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| 35 |
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| 36 | #include <X11/X.h>
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| 37 | #include "scrnintstr.h"
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| 38 | #include "windowstr.h"
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| 39 | #include <X11/fonts/font.h>
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| 40 | #include "dixfontstr.h"
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| 41 | #include <X11/fonts/fontstruct.h>
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| 42 | #include "mi.h"
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| 43 | #include "regionstr.h"
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| 44 | #include "globals.h"
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| 45 | #include "gcstruct.h"
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| 46 | #include "shadow.h"
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| 47 | #include "fb.h"
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| 48 |
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| 49 | #define DANDEBUG 0
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| 50 |
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| 51 | #if ROTATE == 270
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| 52 |
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| 53 | #define SCRLEFT(x,y,w,h) (pScreen->height - ((y) + (h)))
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| 54 | #define SCRY(x,y,w,h) (x)
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| 55 | #define SCRWIDTH(x,y,w,h) (h)
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| 56 | #define FIRSTSHA(x,y,w,h) (((y) + (h) - 1) * shaStride + (x))
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| 57 | #define STEPDOWN(x,y,w,h) ((w)--)
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| 58 | #define NEXTY(x,y,w,h) ((x)++)
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| 59 | #define SHASTEPX(stride) -(stride)
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| 60 | #define SHASTEPY(stride) (1)
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| 61 |
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| 62 | #elif ROTATE == 90
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| 63 |
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| 64 | #define SCRLEFT(x,y,w,h) (y)
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| 65 | #define SCRY(x,y,w,h) (pScreen->width - ((x) + (w)) - 1)
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| 66 | #define SCRWIDTH(x,y,w,h) (h)
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| 67 | #define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x + w - 1))
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| 68 | #define STEPDOWN(x,y,w,h) ((w)--)
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| 69 | #define NEXTY(x,y,w,h) ((void)(x))
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| 70 | #define SHASTEPX(stride) (stride)
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| 71 | #define SHASTEPY(stride) (-1)
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| 72 |
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| 73 | #elif ROTATE == 180
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| 74 |
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| 75 | #define SCRLEFT(x,y,w,h) (pScreen->width - ((x) + (w)))
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| 76 | #define SCRY(x,y,w,h) (pScreen->height - ((y) + (h)) - 1)
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| 77 | #define SCRWIDTH(x,y,w,h) (w)
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| 78 | #define FIRSTSHA(x,y,w,h) ((y + h - 1) * shaStride + (x + w - 1))
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| 79 | #define STEPDOWN(x,y,w,h) ((h)--)
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| 80 | #define NEXTY(x,y,w,h) ((void)(y))
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| 81 | #define SHASTEPX(stride) (-1)
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| 82 | #define SHASTEPY(stride) -(stride)
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| 83 |
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| 84 | #else
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| 85 |
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| 86 | #define SCRLEFT(x,y,w,h) (x)
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| 87 | #define SCRY(x,y,w,h) (y)
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| 88 | #define SCRWIDTH(x,y,w,h) (w)
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| 89 | #define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x))
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| 90 | #define STEPDOWN(x,y,w,h) ((h)--)
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| 91 | #define NEXTY(x,y,w,h) ((y)++)
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| 92 | #define SHASTEPX(stride) (1)
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| 93 | #define SHASTEPY(stride) (stride)
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| 94 |
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| 95 | #endif
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| 96 |
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| 97 | void
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| 98 | FUNC (ScreenPtr pScreen,
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| 99 | shadowBufPtr pBuf)
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| 100 | {
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| 101 | RegionPtr damage = shadowDamage (pBuf);
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| 102 | PixmapPtr pShadow = pBuf->pPixmap;
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| 103 | int nbox = REGION_NUM_RECTS (damage);
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| 104 | BoxPtr pbox = REGION_RECTS (damage);
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| 105 | FbBits *shaBits;
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| 106 | Data *shaBase, *shaLine, *sha;
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| 107 | FbStride shaStride;
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| 108 | int scrBase, scrLine, scr;
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| 109 | int shaBpp;
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| 110 | int shaXoff, shaYoff; /* XXX assumed to be zero */
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| 111 | int x, y, w, h, width;
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| 112 | int i;
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| 113 | Data *winBase = NULL, *win;
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| 114 | CARD32 winSize;
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| 115 |
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| 116 | fbGetDrawable (&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff, shaYoff);
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| 117 | shaBase = (Data *) shaBits;
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| 118 | shaStride = shaStride * sizeof (FbBits) / sizeof (Data);
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| 119 | #if (DANDEBUG > 1)
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| 120 | ErrorF ("-> Entering Shadow Update:\r\n |- Origins: pShadow=%x, pScreen=%x, damage=%x\r\n |- Metrics: shaStride=%d, shaBase=%x, shaBpp=%d\r\n | \n", pShadow, pScreen, damage, shaStride, shaBase, shaBpp);
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| 121 | #endif
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| 122 | while (nbox--)
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| 123 | {
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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 (" |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n", x, y, w, h);
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| 131 | #endif
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| 132 | scrLine = SCRLEFT(x,y,w,h);
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| 133 | shaLine = shaBase + FIRSTSHA(x,y,w,h);
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| 134 |
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| 135 | while (STEPDOWN(x,y,w,h))
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| 136 | {
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| 137 | winSize = 0;
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| 138 | scrBase = 0;
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| 139 | width = SCRWIDTH(x,y,w,h);
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| 140 | scr = scrLine;
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| 141 | sha = shaLine;
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| 142 | #if (DANDEBUG > 3)
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| 143 | ErrorF (" | |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n", width, scr, sha);
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| 144 | #endif
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| 145 | while (width)
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| 146 | {
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| 147 | /* how much remains in this window */
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| 148 | i = scrBase + winSize - scr;
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| 149 | if (i <= 0 || scr < scrBase)
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| 150 | {
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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 (" | | |-> Starting New Line - Metrics: winBase=%x, scrBase=%x, winSize=%d\r\n | | | Xstride=%d, Ystride=%d, w=%d h=%d\n", winBase, scrBase, winSize, SHASTEPX(shaStride), SHASTEPY(shaStride), w, h);
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| 164 | #endif
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| 165 | }
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| 166 | win = winBase + (scr - scrBase);
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| 167 | if (i > width)
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| 168 | i = width;
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| 169 | width -= i;
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| 170 | scr += i;
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| 171 | #if(DANDEBUG > 5)
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| 172 | ErrorF (" | | |-> Writing Line - Metrics: win=%x, sha=%x\n", win, sha);
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| 173 | #endif
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| 174 | while (i--)
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| 175 | {
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| 176 | #if(DANDEBUG > 6)
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| 177 | ErrorF (" | | |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n", win, sha, i);
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| 178 | #endif
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| 179 | *win++ = *sha;
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| 180 | sha += SHASTEPX(shaStride);
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| 181 | } /* i */
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| 182 | } /* width */
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| 183 | shaLine += SHASTEPY(shaStride);
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| 184 | NEXTY(x,y,w,h);
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| 185 | } /* STEPDOWN */
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| 186 | pbox++;
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| 187 | } /* nbox */
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| 188 | }
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