xorg-server-1.4/hw/xfree86/xf4bpp/ppcFillRct.c

   1 /* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
   2 /***********************************************************
   3
   4 Copyright (c) 1987  X Consortium
   5
   6 Permission is hereby granted, free of charge, to any person obtaining a copy
   7 of this software and associated documentation files (the "Software"), to deal
   8 in the Software without restriction, including without limitation the rights
   9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 copies of the Software, and to permit persons to whom the Software is
  11 furnished to do so, subject to the following conditions:
  12
  13 The above copyright notice and this permission notice shall be included in
  14 all copies or substantial portions of the Software.
  15
  16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  19 X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 Except as contained in this notice, the name of the X Consortium shall not be
  24 used in advertising or otherwise to promote the sale, use or other dealings
  25 in this Software without prior written authorization from the X Consortium.
  26
  27
  28 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  29
  30                         All Rights Reserved
  31
  32 Permission to use, copy, modify, and distribute this software and its
  33 documentation for any purpose and without fee is hereby granted,
  34 provided that the above copyright notice appear in all copies and that
  35 both that copyright notice and this permission notice appear in
  36 supporting documentation, and that the name of Digital not be
  37 used in advertising or publicity pertaining to distribution of the
  38 software without specific, written prior permission.
  39
  40 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  41 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  42 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  43 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  44 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  45 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  46 SOFTWARE.
  47
  48 ******************************************************************/
  49
  50 #ifdef HAVE_XORG_CONFIG_H
  51 #include <xorg-config.h>
  52 #endif
  53
  54 #include "xf4bpp.h"
  55 #include "mfbmap.h"
  56 #include "mfb.h"
  57 #include "maskbits.h"
  58 #include "scrnintstr.h"
  59
  60 #define MODEQ(a, b) ((a) %= (b))
  61
  62 /*
  63     filled rectangles.
  64     translate the rectangles, clip them, and call the
  65 helper function in the GC.
  66 */
  67
  68 #define NUM_STACK_RECTS 1024
  69
  70 void
  71 xf4bppPolyFillRect(pDrawable, pGC, nrectFill, prectInit)
  72     DrawablePtr pDrawable;
  73     GCPtr       pGC;
  74     int         nrectFill;      /* number of rectangles to fill */
  75     xRectangle  *prectInit;     /* Pointer to first rectangle to fill */
  76 {
  77     xRectangle      *prect;
  78     RegionPtr       prgnClip;
  79     register BoxPtr pbox;
  80     register BoxPtr pboxClipped;
  81     BoxPtr          pboxClippedBase;
  82     BoxPtr          pextent;
  83     BoxRec          stackRects[NUM_STACK_RECTS];
  84     int             numRects;
  85     int             n;
  86     int             xorg, yorg;
  87
  88     if (!(pGC->planemask & 0x0F)) /* GJA */
  89         return;
  90
  91     prgnClip = pGC->pCompositeClip;
  92
  93     prect = prectInit;
  94     xorg = pDrawable->x;
  95     yorg = pDrawable->y;
  96     if (xorg || yorg)
  97     {
  98         prect = prectInit;
  99         n = nrectFill;
 100         Duff (n, prect->x += xorg; prect->y += yorg; prect++);
 101     }
 102
 103
 104     prect = prectInit;
 105
 106     numRects = REGION_NUM_RECTS(prgnClip) * nrectFill;
 107     if (numRects > NUM_STACK_RECTS)
 108     {
 109         pboxClippedBase = (BoxPtr)ALLOCATE_LOCAL(numRects * sizeof(BoxRec));
 110         if (!pboxClippedBase)
 111             return;
 112     }
 113     else
 114         pboxClippedBase = stackRects;
 115
 116     pboxClipped = pboxClippedBase;
 117
 118     if (REGION_NUM_RECTS(prgnClip) == 1)
 119     {
 120         int x1, y1, x2, y2, bx2, by2;
 121
 122         pextent = REGION_RECTS(prgnClip);
 123         x1 = pextent->x1;
 124         y1 = pextent->y1;
 125         x2 = pextent->x2;
 126         y2 = pextent->y2;
 127         while (nrectFill--)
 128         {
 129             if ((pboxClipped->x1 = prect->x) < x1)
 130                 pboxClipped->x1 = x1;
 131
 132             if ((pboxClipped->y1 = prect->y) < y1)
 133                 pboxClipped->y1 = y1;
 134
 135             bx2 = (int) prect->x + (int) prect->width;
 136             if (bx2 > x2)
 137                 bx2 = x2;
 138             pboxClipped->x2 = bx2;
 139
 140             by2 = (int) prect->y + (int) prect->height;
 141             if (by2 > y2)
 142                 by2 = y2;
 143             pboxClipped->y2 = by2;
 144
 145             prect++;
 146             if ((pboxClipped->x1 < pboxClipped->x2) &&
 147                 (pboxClipped->y1 < pboxClipped->y2))
 148             {
 149                 pboxClipped++;
 150             }
 151         }
 152     }
 153     else
 154     {
 155         int x1, y1, x2, y2, bx2, by2;
 156
 157         pextent = REGION_EXTENTS(pGC->pScreen, prgnClip);
 158         x1 = pextent->x1;
 159         y1 = pextent->y1;
 160         x2 = pextent->x2;
 161         y2 = pextent->y2;
 162         while (nrectFill--)
 163         {
 164             BoxRec box;
 165
 166             if ((box.x1 = prect->x) < x1)
 167                 box.x1 = x1;
 168
 169             if ((box.y1 = prect->y) < y1)
 170                 box.y1 = y1;
 171
 172             bx2 = (int) prect->x + (int) prect->width;
 173             if (bx2 > x2)
 174                 bx2 = x2;
 175             box.x2 = bx2;
 176
 177             by2 = (int) prect->y + (int) prect->height;
 178             if (by2 > y2)
 179                 by2 = y2;
 180             box.y2 = by2;
 181
 182             prect++;
 183
 184             if ((box.x1 >= box.x2) || (box.y1 >= box.y2))
 185                 continue;
 186
 187             n = REGION_NUM_RECTS (prgnClip);
 188             pbox = REGION_RECTS(prgnClip);
 189
 190             /* clip the rectangle to each box in the clip region
 191                this is logically equivalent to calling Intersect()
 192             */
 193             while(n--)
 194             {
 195                 pboxClipped->x1 = max(box.x1, pbox->x1);
 196                 pboxClipped->y1 = max(box.y1, pbox->y1);
 197                 pboxClipped->x2 = min(box.x2, pbox->x2);
 198                 pboxClipped->y2 = min(box.y2, pbox->y2);
 199                 pbox++;
 200
 201                 /* see if clipping left anything */
 202                 if(pboxClipped->x1 < pboxClipped->x2 &&
 203                    pboxClipped->y1 < pboxClipped->y2)
 204                 {
 205                     pboxClipped++;
 206                 }
 207             }
 208         }
 209     }
 210     if (pboxClipped != pboxClippedBase)
 211         xf4bppFillArea((WindowPtr)pDrawable, pboxClipped-pboxClippedBase,
 212                        pboxClippedBase, pGC);
 213     if (pboxClippedBase != stackRects)
 214         DEALLOCATE_LOCAL(pboxClippedBase);
 215 }