rom/graphics/areregionsequal.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function AndRegionRegion()
   6     Lang: english
   7 */
   8 #include "graphics_intern.h"
   9 #include <graphics/regions.h>
  10 #include "intregions.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <proto/graphics.h>
  16
  17         AROS_LH2(BOOL, AreRegionsEqual,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(struct Region *, R1, A0),
  21         AROS_LHA(struct Region *, R2, A1),
  22
  23 /*  LOCATION */
  24         struct GfxBase *, GfxBase, 189, Graphics)
  25
  26 /*  FUNCTION
  27         Compares two regions.
  28
  29     INPUTS
  30         region1 - pointer to a region structure
  31         region2 - pointer to a region structure
  32
  33     RESULT
  34         TRUE if the regions are equal, FALSE otherwise.
  35
  36     NOTES
  37
  38     EXAMPLE
  39
  40     BUGS
  41
  42     SEE ALSO
  43         XorRegionRegion(), OrRegionRegion()
  44
  45     INTERNALS
  46
  47     HISTORY
  48
  49 *****************************************************************************/
  50 {
  51     AROS_LIBFUNC_INIT
  52
  53     struct RegionRectangle *rr1, *rr2;
  54
  55     if (!_AreRectsEqual(Bounds(R1), Bounds(R2)))
  56         return FALSE;
  57
  58     for
  59     (
  60         rr1 = R1->RegionRectangle, rr2 = R2->RegionRectangle;
  61         rr1 && rr2 && _AreRectsEqual(Bounds(rr1), Bounds(rr2));
  62         rr1 = rr1->Next, rr2 = rr2->Next
  63     );
  64
  65     return rr1 == rr2;
  66
  67     AROS_LIBFUNC_EXIT
  68 }