IABSD.fr/xenocara/xserver/fb/fbgetsp.c

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• Author : matthieu
  Date : 2007-11-24 17:55:21
  Hash : b14d6de7
  Message : xserver 1.4

• xserver/fb/fbgetsp.c

• /*
   * Copyright © 1998 Keith Packard
   *
   * Permission to use, copy, modify, distribute, and sell this software and its
   * documentation for any purpose is hereby granted without fee, provided that
   * the above copyright notice appear in all copies and that both that
   * copyright notice and this permission notice appear in supporting
   * documentation, and that the name of Keith Packard not be used in
   * advertising or publicity pertaining to distribution of the software without
   * specific, written prior permission.  Keith Packard makes no
   * representations about the suitability of this software for any purpose.  It
   * is provided "as is" without express or implied warranty.
   *
   * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
   * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
   * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
   * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
   * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
   * PERFORMANCE OF THIS SOFTWARE.
   */
  
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  
  #include "fb.h"
  
  void
  fbGetSpans(DrawablePtr	pDrawable, 
  	   int		wMax, 
  	   DDXPointPtr	ppt, 
  	   int		*pwidth, 
  	   int		nspans, 
  	   char		*pchardstStart)
  {
      FbBits	    *src, *dst;
      FbStride	    srcStride;
      int		    srcBpp;
      int		    srcXoff, srcYoff;
      int		    xoff;
      
      /*
       * XFree86 DDX empties the root borderClip when the VT is
       * switched away; this checks for that case
       */
      if (!fbDrawableEnabled(pDrawable))
  	return;
      
  #ifdef FB_24_32BIT
      if (pDrawable->bitsPerPixel != BitsPerPixel(pDrawable->depth))
      {
  	fb24_32GetSpans (pDrawable, wMax, ppt, pwidth, nspans, pchardstStart);
  	return;
      }
  #endif
      
      fbGetDrawable (pDrawable, src, srcStride, srcBpp, srcXoff, srcYoff);
      
      while (nspans--)
      {
  	xoff = (int) (((long) pchardstStart) & (FB_MASK >> 3));
  	dst = (FbBits *) (pchardstStart - xoff);
  	xoff <<= 3;
  	fbBlt (src + (ppt->y + srcYoff) * srcStride, srcStride,
  	       (ppt->x + srcXoff) * srcBpp,
  	       
  	       dst,
  	       1,
  	       xoff,
  
  	       *pwidth * srcBpp,
  	       1,
  
  	       GXcopy,
  	       FB_ALLONES,
  	       srcBpp,
  
  	       FALSE,
  	       FALSE);
  	pchardstStart += PixmapBytePad(*pwidth, pDrawable->depth);
  	ppt++;
  	pwidth++;
      }
  
      fbFinishAccess (pDrawable);
  }