xorg-server-1.4/afb/afbgetsp.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_DIX_CONFIG_H
  51 #include <dix-config.h>
  52 #endif
  53
  54 #include <X11/X.h>
  55 #include <X11/Xmd.h>
  56
  57 #include "misc.h"
  58 #include "region.h"
  59 #include "gc.h"
  60 #include "windowstr.h"
  61 #include "pixmapstr.h"
  62 #include "scrnintstr.h"
  63
  64 #include "afb.h"
  65 #include "maskbits.h"
  66
  67 #include "servermd.h"
  68
  69 /* GetSpans -- for each span, gets bits from drawable starting at ppt[i]
  70  * and continuing for pwidth[i] bits
  71  * Each scanline returned will be server scanline padded, i.e., it will come
  72  * out to an integral number of words.
  73  */
  74 /*ARGSUSED*/
  75 void
  76 afbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pchardstStart)
  77         DrawablePtr             pDrawable;      /* drawable from which to get bits */
  78         int                     wMax;           /* largest value of all *pwidths */
  79         register DDXPointPtr    ppt;            /* points to start copying from */
  80         int                     *pwidth;        /* list of number of bits to copy */
  81         int                     nspans;         /* number of scanlines to copy */
  82         char                    *pchardstStart; /* where to put the bits */
  83 {
  84         PixelType               *pdstStart = (PixelType *)pchardstStart;
  85         register PixelType      *pdst;          /* where to put the bits */
  86         register PixelType      *psrc;          /* where to get the bits */
  87         register PixelType      tmpSrc;         /* scratch buffer for bits */
  88         PixelType               *psrcBase;      /* start of src bitmap */
  89         int                     widthSrc;       /* width of pixmap in bytes */
  90         int                     sizeSrc;
  91         int                     depthSrc;
  92         register DDXPointPtr    pptLast;        /* one past last point to get */
  93         int                     xEnd;           /* last pixel to copy from */
  94         register int            nstart;
  95         register int            d;
  96         int                     nend = 0;
  97         int                     srcStartOver;
  98         PixelType               startmask, endmask;
  99         unsigned int            srcBit;
 100         int                     nlMiddle, nl;
 101         int                     w;
 102
 103         pptLast = ppt + nspans;
 104
 105         afbGetPixelWidthSizeDepthAndPointer(pDrawable, widthSrc, sizeSrc, depthSrc,
 106                                                                                                          psrcBase);
 107         pdst = pdstStart;
 108
 109         while(ppt < pptLast) {
 110                 /* XXX should this really be << PWSH, or * 8, or * PGSZB? */
 111                 xEnd = min(ppt->x + *pwidth, widthSrc << PWSH);
 112                 pwidth++;
 113                 for (d = 0; d < depthSrc; d++) {
 114                         psrc = afbScanline(psrcBase, ppt->x, ppt->y, widthSrc);
 115                         psrcBase += sizeSrc;    /* @@@ NEXT PLANE @@@ */
 116                         w = xEnd - ppt->x;
 117                         srcBit = ppt->x & PIM;
 118
 119                         if (srcBit + w <= PPW)
 120                         {
 121                                 getandputbits0(psrc, srcBit, w, pdst);
 122                                 pdst++;
 123                         }
 124                         else
 125                         {
 126
 127                                 maskbits(ppt->x, w, startmask, endmask, nlMiddle);
 128                                 if (startmask)
 129                                         nstart = PPW - srcBit;
 130                                 else
 131                                         nstart = 0;
 132                                 if (endmask)
 133                                         nend = xEnd & PIM;
 134                                 srcStartOver = srcBit + nstart > PLST;
 135                                 if (startmask)
 136                                 {
 137                                         getandputbits0(psrc, srcBit, nstart, pdst);
 138                                         if(srcStartOver)
 139                                                 psrc++;
 140                                 }
 141                                 nl = nlMiddle;
 142 #ifdef FASTPUTBITS
 143                                 Duff(nl, putbits(*psrc, nstart, PPW, pdst); psrc++; pdst++;);
 144 #else
 145                                 while (nl--)
 146                                 {
 147                                         tmpSrc = *psrc;
 148                                         putbits(tmpSrc, nstart, PPW, pdst);
 149                                         psrc++;
 150                                         pdst++;
 151                                 }
 152 #endif
 153                                 if (endmask)
 154                                 {
 155                                         putbits(*psrc, nstart, nend, pdst);
 156                                         if(nstart + nend > PPW)
 157                                                 pdst++;
 158                                 }
 159                                 if (startmask || endmask)
 160                                         pdst++;
 161                         }
 162                 }
 163                 ppt++;
 164         }
 165 }