xorg-server-1.4/fb/fbgetsp.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 fbGetSpans(DrawablePtr  pDrawable,
  31            int          wMax,
  32            DDXPointPtr  ppt,
  33            int          *pwidth,
  34            int          nspans,
  35            char         *pchardstStart)
  36 {
  37     FbBits          *src, *dst;
  38     FbStride        srcStride;
  39     int             srcBpp;
  40     int             srcXoff, srcYoff;
  41     int             xoff;
  42
  43     /*
  44      * XFree86 DDX empties the root borderClip when the VT is
  45      * switched away; this checks for that case
  46      */
  47     if (!fbDrawableEnabled(pDrawable))
  48         return;
  49
  50 #ifdef FB_24_32BIT
  51     if (pDrawable->bitsPerPixel != BitsPerPixel(pDrawable->depth))
  52     {
  53         fb24_32GetSpans (pDrawable, wMax, ppt, pwidth, nspans, pchardstStart);
  54         return;
  55     }
  56 #endif
  57
  58     fbGetDrawable (pDrawable, src, srcStride, srcBpp, srcXoff, srcYoff);
  59
  60     while (nspans--)
  61     {
  62         xoff = (int) (((long) pchardstStart) & (FB_MASK >> 3));
  63         dst = (FbBits *) (pchardstStart - xoff);
  64         xoff <<= 3;
  65         fbBlt (src + (ppt->y + srcYoff) * srcStride, srcStride,
  66                (ppt->x + srcXoff) * srcBpp,
  67
  68                dst,
  69                1,
  70                xoff,
  71
  72                *pwidth * srcBpp,
  73                1,
  74
  75                GXcopy,
  76                FB_ALLONES,
  77                srcBpp,
  78
  79                FALSE,
  80                FALSE);
  81         pchardstStart += PixmapBytePad(*pwidth, pDrawable->depth);
  82         ppt++;
  83         pwidth++;
  84     }
  85
  86     fbFinishAccess (pDrawable);
  87 }