xorg-server-1.4/miext/shadow/shrotpack.h

   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
  97 FUNC (ScreenPtr     pScreen,
  98       shadowBufPtr  pBuf)
  99 {
 100     RegionPtr   damage = shadowDamage (pBuf);
 101     PixmapPtr   pShadow = pBuf->pPixmap;
 102     int         nbox = REGION_NUM_RECTS (damage);
 103     BoxPtr      pbox = REGION_RECTS (damage);
 104     FbBits      *shaBits;
 105     Data        *shaBase, *shaLine, *sha;
 106     FbStride    shaStride;
 107     int         scrBase, scrLine, scr;
 108     int         shaBpp;
 109     int         shaXoff, shaYoff;   /* XXX assumed to be zero */
 110     int         x, y, w, h, width;
 111     int         i;
 112     Data        *winBase = NULL, *win;
 113     CARD32      winSize;
 114
 115     fbGetDrawable (&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff, shaYoff);
 116     shaBase = (Data *) shaBits;
 117     shaStride = shaStride * sizeof (FbBits) / sizeof (Data);
 118 #if (DANDEBUG > 1)
 119     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);
 120 #endif
 121     while (nbox--)
 122     {
 123         x = pbox->x1;
 124         y = pbox->y1;
 125         w = (pbox->x2 - pbox->x1);
 126         h = pbox->y2 - pbox->y1;
 127
 128 #if (DANDEBUG > 2)
 129         ErrorF ("   |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n", x, y, w, h);
 130 #endif
 131         scrLine = SCRLEFT(x,y,w,h);
 132         shaLine = shaBase + FIRSTSHA(x,y,w,h);
 133
 134         while (STEPDOWN(x,y,w,h))
 135         {
 136             winSize = 0;
 137             scrBase = 0;
 138             width = SCRWIDTH(x,y,w,h);
 139             scr = scrLine;
 140             sha = shaLine;
 141 #if (DANDEBUG > 3)
 142             ErrorF ("   |   |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n", width, scr, sha);
 143 #endif
 144             while (width)
 145             {
 146                 /*  how much remains in this window */
 147                 i = scrBase + winSize - scr;
 148                 if (i <= 0 || scr < scrBase)
 149                 {
 150                     winBase = (Data *) (*pBuf->window) (pScreen,
 151                                                         SCRY(x,y,w,h),
 152                                                         scr * sizeof (Data),
 153                                                         SHADOW_WINDOW_WRITE,
 154                                                         &winSize,
 155                                                         pBuf->closure);
 156                     if(!winBase)
 157                         return;
 158                     scrBase = scr;
 159                     winSize /= sizeof (Data);
 160                     i = winSize;
 161 #if(DANDEBUG > 4)
 162                     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);
 163 #endif
 164                 }
 165                 win = winBase + (scr - scrBase);
 166                 if (i > width)
 167                     i = width;
 168                 width -= i;
 169                 scr += i;
 170 #if(DANDEBUG > 5)
 171                 ErrorF ("   |   |   |-> Writing Line - Metrics: win=%x, sha=%x\n", win, sha);
 172 #endif
 173                 while (i--)
 174                 {
 175 #if(DANDEBUG > 6)
 176                     ErrorF ("   |   |   |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n", win, sha, i);
 177 #endif
 178                     *win++ = *sha;
 179                     sha += SHASTEPX(shaStride);
 180                 } /*  i */
 181             } /*  width */
 182             shaLine += SHASTEPY(shaStride);
 183             NEXTY(x,y,w,h);
 184         } /*  STEPDOWN */
 185         pbox++;
 186     } /*  nbox */
 187 }