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

Branch : - branch - master - tag -

• Show log

  Commit

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

• xserver/fb/fbfillrect.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
  fbPolyFillRect(DrawablePtr  pDrawable, 
  	       GCPtr	    pGC, 
  	       int	    nrect,
  	       xRectangle   *prect)
  {
      RegionPtr	    pClip = fbGetCompositeClip(pGC);
      register BoxPtr pbox;
      BoxPtr	    pextent;
      int		    extentX1, extentX2, extentY1, extentY2;
      int		    fullX1, fullX2, fullY1, fullY2;
      int		    partX1, partX2, partY1, partY2;
      int		    xorg, yorg;
      int		    n;
  
      xorg = pDrawable->x;
      yorg = pDrawable->y;
      
      pextent = REGION_EXTENTS(pGC->pScreen, pClip);
      extentX1 = pextent->x1;
      extentY1 = pextent->y1;
      extentX2 = pextent->x2;
      extentY2 = pextent->y2;
      while (nrect--)
      {
  	fullX1 = prect->x + xorg;
  	fullY1 = prect->y + yorg;
  	fullX2 = fullX1 + (int) prect->width;
  	fullY2 = fullY1 + (int) prect->height;
  	prect++;
  	
  	if (fullX1 < extentX1)
  	    fullX1 = extentX1;
  
  	if (fullY1 < extentY1)
  	    fullY1 = extentY1;
  
  	if (fullX2 > extentX2)
  	    fullX2 = extentX2;
  	
  	if (fullY2 > extentY2)
  	    fullY2 = extentY2;
  
  	if ((fullX1 >= fullX2) || (fullY1 >= fullY2))
  	    continue;
  	n = REGION_NUM_RECTS (pClip);
  	if (n == 1)
  	{
  	    fbFill (pDrawable,
  		    pGC,
  		    fullX1, fullY1, fullX2-fullX1, fullY2-fullY1);
  	}
  	else
  	{
  	    pbox = REGION_RECTS(pClip);
  	    /* 
  	     * clip the rectangle to each box in the clip region
  	     * this is logically equivalent to calling Intersect()
  	     */
  	    while(n--)
  	    {
  		partX1 = pbox->x1;
  		if (partX1 < fullX1)
  		    partX1 = fullX1;
  		partY1 = pbox->y1;
  		if (partY1 < fullY1)
  		    partY1 = fullY1;
  		partX2 = pbox->x2;
  		if (partX2 > fullX2)
  		    partX2 = fullX2;
  		partY2 = pbox->y2;
  		if (partY2 > fullY2)
  		    partY2 = fullY2;
      
  		pbox++;
  		
  		if (partX1 < partX2 && partY1 < partY2)
  		    fbFill (pDrawable, pGC,
  			    partX1, partY1,
  			    partX2 - partX1, partY2 - partY1);
  	    }
  	}
      }
  }