fb/fbpoint.c

   1 /*
   2  * Copyright © 1998 Keith Packard
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of Keith Packard not be used in
   9  * advertising or publicity pertaining to distribution of the software without
  10  * specific, written prior permission.  Keith Packard makes no
  11  * representations about the suitability of this software for any purpose.  It
  12  * is provided "as is" without express or implied warranty.
  13  *
  14  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  20  * PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_DIX_CONFIG_H
  24 #include <dix-config.h>
  25 #endif
  26
  27 #include "fb.h"
  28
  29 typedef void (*FbDots) (FbBits * dst,
  30                         FbStride dstStride,
  31                         int dstBpp,
  32                         BoxPtr pBox,
  33                         xPoint * pts,
  34                         int npt,
  35                         int xorg,
  36                         int yorg, int xoff, int yoff, FbBits and, FbBits xor);
  37
  38 void
  39 fbDots(FbBits * dstOrig,
  40        FbStride dstStride,
  41        int dstBpp,
  42        BoxPtr pBox,
  43        xPoint * pts,
  44        int npt,
  45        int xorg, int yorg, int xoff, int yoff, FbBits andOrig, FbBits xorOrig)
  46 {
  47     FbStip *dst = (FbStip *) dstOrig;
  48     int x1, y1, x2, y2;
  49     int x, y;
  50     FbStip *d;
  51     FbStip and = andOrig;
  52     FbStip xor = xorOrig;
  53
  54     dstStride = FbBitsStrideToStipStride(dstStride);
  55     x1 = pBox->x1;
  56     y1 = pBox->y1;
  57     x2 = pBox->x2;
  58     y2 = pBox->y2;
  59     while (npt--) {
  60         x = pts->x + xorg;
  61         y = pts->y + yorg;
  62         pts++;
  63         if (x1 <= x && x < x2 && y1 <= y && y < y2) {
  64             x = (x + xoff) * dstBpp;
  65             d = dst + ((y + yoff) * dstStride) + (x >> FB_STIP_SHIFT);
  66             x &= FB_STIP_MASK;
  67             if (dstBpp == 24) {
  68                 FbStip leftMask, rightMask;
  69                 int n, rot;
  70                 FbStip andT, xorT;
  71
  72                 rot = FbFirst24Rot(x);
  73                 andT = FbRot24Stip(and, rot);
  74                 xorT = FbRot24Stip(xor, rot);
  75                 FbMaskStip(x, 24, leftMask, n, rightMask);
  76                 if (leftMask) {
  77                     WRITE(d, FbDoMaskRRop(READ(d), andT, xorT, leftMask));
  78                     andT = FbNext24Stip(andT);
  79                     xorT = FbNext24Stip(xorT);
  80                     d++;
  81                 }
  82                 if (rightMask)
  83                     WRITE(d, FbDoMaskRRop(READ(d), andT, xorT, rightMask));
  84             }
  85             else {
  86                 FbStip mask;
  87
  88                 mask = FbStipMask(x, dstBpp);
  89                 WRITE(d, FbDoMaskRRop(READ(d), and, xor, mask));
  90             }
  91         }
  92     }
  93 }
  94
  95 void
  96 fbPolyPoint(DrawablePtr pDrawable,
  97             GCPtr pGC, int mode, int nptInit, xPoint * pptInit)
  98 {
  99     FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
 100     RegionPtr pClip = fbGetCompositeClip(pGC);
 101     FbBits *dst;
 102     FbStride dstStride;
 103     int dstBpp;
 104     int dstXoff, dstYoff;
 105     FbDots dots;
 106     FbBits and, xor;
 107     xPoint *ppt;
 108     int npt;
 109     BoxPtr pBox;
 110     int nBox;
 111
 112     /* make pointlist origin relative */
 113     ppt = pptInit;
 114     npt = nptInit;
 115     if (mode == CoordModePrevious) {
 116         npt--;
 117         while (npt--) {
 118             ppt++;
 119             ppt->x += (ppt - 1)->x;
 120             ppt->y += (ppt - 1)->y;
 121         }
 122     }
 123     fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
 124     and = pPriv->and;
 125     xor = pPriv->xor;
 126     dots = fbDots;
 127     switch (dstBpp) {
 128     case 8:
 129         dots = fbDots8;
 130         break;
 131     case 16:
 132         dots = fbDots16;
 133         break;
 134     case 24:
 135         dots = fbDots24;
 136         break;
 137     case 32:
 138         dots = fbDots32;
 139         break;
 140     }
 141     for (nBox = RegionNumRects(pClip), pBox = RegionRects(pClip);
 142          nBox--; pBox++)
 143         (*dots) (dst, dstStride, dstBpp, pBox, pptInit, nptInit,
 144                  pDrawable->x, pDrawable->y, dstXoff, dstYoff, and, xor);
 145     fbFinishAccess(pDrawable);
 146 }