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

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• Author : matthieu
  Date : 2015-09-16 19:10:19
  Hash : 86ea9f12
  Message : Update to xserver 1.17.2. tested by dcoppa@, jsg@, jasper@ & naddy@

• 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 = RegionExtents(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 = RegionNumRects(pClip);
          if (n == 1) {
              fbFill(pDrawable,
                     pGC, fullX1, fullY1, fullX2 - fullX1, fullY2 - fullY1);
          }
          else {
              pbox = RegionRects(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);
              }
          }
      }
  }