xorg-server-1.4/mi/mipushpxl.c

   1 /***********************************************************
   2
   3 Copyright 1987, 1998  The Open Group
   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.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25
  26 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  27
  28                         All Rights Reserved
  29
  30 Permission to use, copy, modify, and distribute this software and its
  31 documentation for any purpose and without fee is hereby granted,
  32 provided that the above copyright notice appear in all copies and that
  33 both that copyright notice and this permission notice appear in
  34 supporting documentation, and that the name of Digital not be
  35 used in advertising or publicity pertaining to distribution of the
  36 software without specific, written prior permission.
  37
  38 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  39 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  40 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  41 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  42 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  43 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  44 SOFTWARE.
  45
  46 ******************************************************************/
  47 #ifdef HAVE_DIX_CONFIG_H
  48 #include <dix-config.h>
  49 #endif
  50
  51 #include <X11/X.h>
  52 #include "gcstruct.h"
  53 #include "scrnintstr.h"
  54 #include "pixmapstr.h"
  55 #include "regionstr.h"
  56 #include "../mfb/maskbits.h"
  57 #include "mi.h"
  58
  59 #define NPT 128
  60
  61 /* miPushPixels -- squeegees the fill style of pGC through pBitMap
  62  * into pDrawable.  pBitMap is a stencil (dx by dy of it is used, it may
  63  * be bigger) which is placed on the drawable at xOrg, yOrg.  Where a 1 bit
  64  * is set in the bitmap, the fill style is put onto the drawable using
  65  * the GC's logical function. The drawable is not changed where the bitmap
  66  * has a zero bit or outside the area covered by the stencil.
  67
  68 WARNING:
  69     this code works if the 1-bit deep pixmap format returned by GetSpans
  70 is the same as the format defined by the mfb code (i.e. 32-bit padding
  71 per scanline, scanline unit = 32 bits; later, this might mean
  72 bitsizeof(int) padding and sacnline unit == bitsizeof(int).)
  73
  74  */
  75
  76 /*
  77  * in order to have both (MSB_FIRST and LSB_FIRST) versions of this
  78  * in the server, we need to rename one of them
  79  */
  80 _X_EXPORT void
  81 miPushPixels(pGC, pBitMap, pDrawable, dx, dy, xOrg, yOrg)
  82     GCPtr       pGC;
  83     PixmapPtr   pBitMap;
  84     DrawablePtr pDrawable;
  85     int         dx, dy, xOrg, yOrg;
  86 {
  87     int         h, dxDivPPW, ibEnd;
  88     MiBits      *pwLineStart;
  89     MiBits      *pw, *pwEnd;
  90     MiBits      msk;
  91     int         ib, w;
  92     int         ipt;            /* index into above arrays */
  93     Bool        fInBox;
  94     DDXPointRec pt[NPT], ptThisLine;
  95     int         width[NPT];
  96 #if 1
  97     PixelType   startmask;
  98     if (screenInfo.bitmapBitOrder == IMAGE_BYTE_ORDER)
  99       if (screenInfo.bitmapBitOrder == LSBFirst)
 100         startmask = (MiBits)(-1) ^
 101             LONG2CHARSSAMEORDER((MiBits)(-1) << 1);
 102       else
 103         startmask = (MiBits)(-1) ^
 104             LONG2CHARSSAMEORDER((MiBits)(-1) >> 1);
 105     else
 106       if (screenInfo.bitmapBitOrder == LSBFirst)
 107         startmask = (MiBits)(-1) ^
 108             LONG2CHARSDIFFORDER((MiBits)(-1) << 1);
 109       else
 110         startmask = (MiBits)(-1) ^
 111             LONG2CHARSDIFFORDER((MiBits)(-1) >> 1);
 112 #endif
 113
 114     pwLineStart = (MiBits *)xalloc(BitmapBytePad(dx));
 115     if (!pwLineStart)
 116         return;
 117     ipt = 0;
 118     dxDivPPW = dx/PPW;
 119
 120     for(h = 0, ptThisLine.x = 0, ptThisLine.y = 0;
 121         h < dy;
 122         h++, ptThisLine.y++)
 123     {
 124
 125         (*pBitMap->drawable.pScreen->GetSpans)((DrawablePtr)pBitMap, dx,
 126                         &ptThisLine, &dx, 1, (char *)pwLineStart);
 127
 128         pw = pwLineStart;
 129         /* Process all words which are fully in the pixmap */
 130
 131         fInBox = FALSE;
 132         pwEnd = pwLineStart + dxDivPPW;
 133         while(pw  < pwEnd)
 134         {
 135             w = *pw;
 136 #if 1
 137             msk = startmask;
 138 #else
 139             msk = (MiBits)(-1) ^ SCRRIGHT((MiBits)(-1), 1);
 140 #endif
 141             for(ib = 0; ib < PPW; ib++)
 142             {
 143                 if(w & msk)
 144                 {
 145                     if(!fInBox)
 146                     {
 147                         pt[ipt].x = ((pw - pwLineStart) << PWSH) + ib + xOrg;
 148                         pt[ipt].y = h + yOrg;
 149                         /* start new box */
 150                         fInBox = TRUE;
 151                     }
 152                 }
 153                 else
 154                 {
 155                     if(fInBox)
 156                     {
 157                         width[ipt] = ((pw - pwLineStart) << PWSH) +
 158                                      ib + xOrg - pt[ipt].x;
 159                         if (++ipt >= NPT)
 160                         {
 161                             (*pGC->ops->FillSpans)(pDrawable, pGC,
 162                                               NPT, pt, width, TRUE);
 163                             ipt = 0;
 164                         }
 165                         /* end box */
 166                         fInBox = FALSE;
 167                     }
 168                 }
 169 #if 1
 170                 /* This is not quite right, but it'll do for now */
 171                 if (screenInfo.bitmapBitOrder == IMAGE_BYTE_ORDER)
 172                   if (screenInfo.bitmapBitOrder == LSBFirst)
 173                     msk = LONG2CHARSSAMEORDER(LONG2CHARSSAMEORDER(msk) << 1);
 174                   else
 175                     msk = LONG2CHARSSAMEORDER(LONG2CHARSSAMEORDER(msk) >> 1);
 176                 else
 177                   if (screenInfo.bitmapBitOrder == LSBFirst)
 178                     msk = LONG2CHARSDIFFORDER(LONG2CHARSDIFFORDER(msk) << 1);
 179                   else
 180                     msk = LONG2CHARSDIFFORDER(LONG2CHARSDIFFORDER(msk) >> 1);
 181 #else
 182                 msk = SCRRIGHT(msk, 1);
 183 #endif
 184             }
 185             pw++;
 186         }
 187         ibEnd = dx & PIM;
 188         if(ibEnd)
 189         {
 190             /* Process final partial word on line */
 191             w = *pw;
 192 #if 1
 193             msk = startmask;
 194 #else
 195             msk = (MiBits)(-1) ^ SCRRIGHT((MiBits)(-1), 1);
 196 #endif
 197             for(ib = 0; ib < ibEnd; ib++)
 198             {
 199                 if(w & msk)
 200                 {
 201                     if(!fInBox)
 202                     {
 203                         /* start new box */
 204                         pt[ipt].x = ((pw - pwLineStart) << PWSH) + ib + xOrg;
 205                         pt[ipt].y = h + yOrg;
 206                         fInBox = TRUE;
 207                     }
 208                 }
 209                 else
 210                 {
 211                     if(fInBox)
 212                     {
 213                         /* end box */
 214                         width[ipt] = ((pw - pwLineStart) << PWSH) +
 215                                      ib + xOrg - pt[ipt].x;
 216                         if (++ipt >= NPT)
 217                         {
 218                             (*pGC->ops->FillSpans)(pDrawable,
 219                                               pGC, NPT, pt, width, TRUE);
 220                             ipt = 0;
 221                         }
 222                         fInBox = FALSE;
 223                     }
 224                 }
 225 #if 1
 226                 /* This is not quite right, but it'll do for now */
 227                 if (screenInfo.bitmapBitOrder == IMAGE_BYTE_ORDER)
 228                   if (screenInfo.bitmapBitOrder == LSBFirst)
 229                     msk = LONG2CHARSSAMEORDER(LONG2CHARSSAMEORDER(msk) << 1);
 230                   else
 231                     msk = LONG2CHARSSAMEORDER(LONG2CHARSSAMEORDER(msk) >> 1);
 232                 else
 233                   if (screenInfo.bitmapBitOrder == LSBFirst)
 234                     msk = LONG2CHARSDIFFORDER(LONG2CHARSDIFFORDER(msk) << 1);
 235                   else
 236                     msk = LONG2CHARSDIFFORDER(LONG2CHARSDIFFORDER(msk) >> 1);
 237 #else
 238                 msk = SCRRIGHT(msk, 1);
 239 #endif
 240             }
 241         }
 242         /* If scanline ended with last bit set, end the box */
 243         if(fInBox)
 244         {
 245             width[ipt] = dx + xOrg - pt[ipt].x;
 246             if (++ipt >= NPT)
 247             {
 248                 (*pGC->ops->FillSpans)(pDrawable, pGC, NPT, pt, width, TRUE);
 249                 ipt = 0;
 250             }
 251         }
 252     }
 253     xfree(pwLineStart);
 254     /* Flush any remaining spans */
 255     if (ipt)
 256     {
 257         (*pGC->ops->FillSpans)(pDrawable, pGC, ipt, pt, width, TRUE);
 258     }
 259 }