xorg-server-1.4/fb/fbsolid.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 #define FbSelectPart(xor,o,t)    xor
  24
  25 #ifdef HAVE_DIX_CONFIG_H
  26 #include <dix-config.h>
  27 #endif
  28
  29 #include "fb.h"
  30
  31 void
  32 fbSolid (FbBits     *dst,
  33          FbStride   dstStride,
  34          int        dstX,
  35          int        bpp,
  36
  37          int        width,
  38          int        height,
  39
  40          FbBits     and,
  41          FbBits     xor)
  42 {
  43     FbBits  startmask, endmask;
  44     int     n, nmiddle;
  45     int     startbyte, endbyte;
  46
  47 #ifdef FB_24BIT
  48     if (bpp == 24 && (!FbCheck24Pix(and) || !FbCheck24Pix(xor)))
  49     {
  50         fbSolid24 (dst, dstStride, dstX, width, height, and, xor);
  51         return;
  52     }
  53 #endif
  54     dst += dstX >> FB_SHIFT;
  55     dstX &= FB_MASK;
  56     FbMaskBitsBytes(dstX, width, and == 0, startmask, startbyte,
  57                     nmiddle, endmask, endbyte);
  58     if (startmask)
  59         dstStride--;
  60     dstStride -= nmiddle;
  61     while (height--)
  62     {
  63         if (startmask)
  64         {
  65             FbDoLeftMaskByteRRop(dst,startbyte,startmask,and,xor);
  66             dst++;
  67         }
  68         n = nmiddle;
  69         if (!and)
  70             while (n--)
  71                 WRITE(dst++, xor);
  72         else
  73             while (n--)
  74             {
  75                 WRITE(dst, FbDoRRop (READ(dst), and, xor));
  76                 dst++;
  77             }
  78         if (endmask)
  79             FbDoRightMaskByteRRop(dst,endbyte,endmask,and,xor);
  80         dst += dstStride;
  81     }
  82 }
  83
  84 #ifdef FB_24BIT
  85 void
  86 fbSolid24 (FbBits   *dst,
  87            FbStride dstStride,
  88            int      dstX,
  89
  90            int      width,
  91            int      height,
  92
  93            FbBits   and,
  94            FbBits   xor)
  95 {
  96     FbBits  startmask, endmask;
  97     FbBits  xor0 = 0, xor1 = 0, xor2 = 0;
  98     FbBits  and0 = 0, and1 = 0, and2 = 0;
  99     FbBits  xorS = 0, andS = 0, xorE = 0, andE = 0;
 100     int     n, nmiddle;
 101     int     rotS, rot;
 102
 103     dst += dstX >> FB_SHIFT;
 104     dstX &= FB_MASK;
 105     /*
 106      * Rotate pixel values this far across the word to align on
 107      * screen pixel boundaries
 108      */
 109     rot = FbFirst24Rot (dstX);
 110     FbMaskBits (dstX, width, startmask, nmiddle, endmask);
 111     if (startmask)
 112         dstStride--;
 113     dstStride -= nmiddle;
 114
 115     /*
 116      * Precompute rotated versions of the rasterop values
 117      */
 118     rotS = rot;
 119     xor = FbRot24(xor,rotS);
 120     and = FbRot24(and,rotS);
 121     if (startmask)
 122     {
 123         xorS = xor;
 124         andS = and;
 125         xor = FbNext24Pix(xor);
 126         and = FbNext24Pix(and);
 127     }
 128
 129     if (nmiddle)
 130     {
 131         xor0 = xor;
 132         and0 = and;
 133         xor1 = FbNext24Pix(xor0);
 134         and1 = FbNext24Pix(and0);
 135         xor2 = FbNext24Pix(xor1);
 136         and2 = FbNext24Pix(and1);
 137     }
 138
 139     if (endmask)
 140     {
 141         switch (nmiddle % 3) {
 142         case 0:
 143             xorE = xor;
 144             andE = and;
 145             break;
 146         case 1:
 147             xorE = xor1;
 148             andE = and1;
 149             break;
 150         case 2:
 151             xorE = xor2;
 152             andE = and2;
 153             break;
 154         }
 155     }
 156
 157     while (height--)
 158     {
 159         if (startmask)
 160         {
 161             WRITE(dst, FbDoMaskRRop(READ(dst), andS, xorS, startmask));
 162             dst++;
 163         }
 164         n = nmiddle;
 165         if (!and0)
 166         {
 167             while (n >= 3)
 168             {
 169                 WRITE(dst++, xor0);
 170                 WRITE(dst++, xor1);
 171                 WRITE(dst++, xor2);
 172                 n -= 3;
 173             }
 174             if (n)
 175             {
 176                 WRITE(dst++, xor0);
 177                 n--;
 178                 if (n)
 179                 {
 180                     WRITE(dst++, xor1);
 181                 }
 182             }
 183         }
 184         else
 185         {
 186             while (n >= 3)
 187             {
 188                 WRITE(dst, FbDoRRop (READ(dst), and0, xor0));
 189                 dst++;
 190                 WRITE(dst, FbDoRRop (READ(dst), and1, xor1));
 191                 dst++;
 192                 WRITE(dst, FbDoRRop (READ(dst), and2, xor2));
 193                 dst++;
 194                 n -= 3;
 195             }
 196             if (n)
 197             {
 198                 WRITE(dst, FbDoRRop (READ(dst), and0, xor0));
 199                 dst++;
 200                 n--;
 201                 if (n)
 202                 {
 203                     WRITE(dst, FbDoRRop (READ(dst), and1, xor1));
 204                     dst++;
 205                 }
 206             }
 207         }
 208         if (endmask)
 209             WRITE(dst, FbDoMaskRRop (READ(dst), andE, xorE, endmask));
 210         dst += dstStride;
 211     }
 212 }
 213 #endif