xorg-server-1.4/fb/fbsetsp.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 void
  30 fbSetSpans (DrawablePtr     pDrawable,
  31             GCPtr           pGC,
  32             char            *src,
  33             DDXPointPtr     ppt,
  34             int             *pwidth,
  35             int             nspans,
  36             int             fSorted)
  37 {
  38     FbGCPrivPtr     pPriv = fbGetGCPrivate (pGC);
  39     RegionPtr       pClip = fbGetCompositeClip(pGC);
  40     FbBits          *dst, *d, *s;
  41     FbStride        dstStride;
  42     int             dstBpp;
  43     int             dstXoff, dstYoff;
  44     BoxPtr          pbox;
  45     int             n;
  46     int             xoff;
  47     int             x1, x2;
  48
  49 #ifdef FB_24_32BIT
  50     if (pDrawable->bitsPerPixel != BitsPerPixel(pDrawable->depth))
  51     {
  52         fb24_32SetSpans (pDrawable, pGC, src, ppt, pwidth, nspans, fSorted);
  53         return;
  54     }
  55 #endif
  56     fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
  57     while (nspans--)
  58     {
  59         d = dst + (ppt->y + dstYoff) * dstStride;
  60         xoff = (int) (((long) src) & (FB_MASK >> 3));
  61         s = (FbBits *) (src - xoff);
  62         xoff <<= 3;
  63         n = REGION_NUM_RECTS(pClip);
  64         pbox = REGION_RECTS (pClip);
  65         while (n--)
  66         {
  67             if (pbox->y1 > ppt->y)
  68                 break;
  69             if (pbox->y2 > ppt->y)
  70             {
  71                 x1 = ppt->x;
  72                 x2 = x1 + *pwidth;
  73                 if (pbox->x1 > x1)
  74                     x1 = pbox->x1;
  75                 if (pbox->x2 < x2)
  76                     x2 = pbox->x2;
  77                 if (x1 < x2)
  78                     fbBlt ((FbBits *) s,
  79                            0,
  80                            (x1 - ppt->x) * dstBpp + xoff,
  81                            d,
  82                            dstStride,
  83                            (x1 + dstXoff) * dstBpp,
  84
  85                            (x2 - x1) * dstBpp,
  86                            1,
  87                            pGC->alu,
  88                            pPriv->pm,
  89                            dstBpp,
  90
  91                            FALSE,
  92                            FALSE);
  93             }
  94         }
  95         src += PixmapBytePad (*pwidth, pDrawable->depth);
  96         ppt++;
  97         pwidth++;
  98     }
  99     fbValidateDrawable (pDrawable);
 100     fbFinishAccess (pDrawable);
 101 }
 102