rom/graphics/andregionregionnd.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function AndRegionRegion()
   6     Lang: english
   7 */
   8
   9 #include "graphics_intern.h"
  10 #include <graphics/regions.h>
  11 #include "intregions.h"
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16 #include <proto/graphics.h>
  17
  18         AROS_LH2(struct Region *, AndRegionRegionND,
  19
  20 /*  SYNOPSIS */
  21         AROS_LHA(struct Region *, R1, A0),
  22         AROS_LHA(struct Region *, R2, A1),
  23
  24 /*  LOCATION */
  25         struct GfxBase *, GfxBase, 187, Graphics)
  26
  27 /*  FUNCTION
  28         AND of one region with another region
  29
  30     INPUTS
  31         region1 - pointer to a region structure
  32         region2 - pointer to a region structure
  33
  34     RESULT
  35         The resulting region or NULL in case there's no enough free memory
  36
  37     NOTES
  38
  39     EXAMPLE
  40
  41     BUGS
  42
  43     SEE ALSO
  44         XorRegionRegion(), OrRegionRegion()
  45
  46     INTERNALS
  47
  48     HISTORY
  49
  50 *****************************************************************************/
  51 {
  52     AROS_LIBFUNC_INIT
  53
  54     struct Region *R3 = NewRegion();
  55
  56     if
  57     (
  58         R3                              &&
  59         R1->RegionRectangle             &&
  60         R2->RegionRectangle             &&
  61         overlap(R1->bounds, R2->bounds)
  62     )
  63     {
  64         if
  65         (
  66             _DoOperationBandBand
  67             (
  68                 _AndBandBand,
  69                 MinX(R1),
  70                 MinX(R2),
  71                 MinY(R1),
  72                 MinY(R2),
  73                 R1->RegionRectangle,
  74                 R2->RegionRectangle,
  75                 &R3->RegionRectangle,
  76                 &R3->bounds,
  77                 GfxBase
  78             )
  79         )
  80         {
  81             _TranslateRegionRectangles(R3->RegionRectangle, -MinX(R3), -MinY(R3));
  82         }
  83         else
  84         {
  85             DisposeRegion(R3);
  86             R3 = NULL;
  87         }
  88     }
  89
  90     return R3;
  91
  92     AROS_LIBFUNC_EXIT
  93 }