rom/graphics/andregionregionnd.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(struct Region *, AndRegionRegionND,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(struct Region *, R1, A0),
  21         AROS_LHA(struct Region *, R2, A1),
  22
  23 /*  LOCATION */
  24         struct GfxBase *, GfxBase, 108, Graphics)
  25
  26 /*  FUNCTION
  27         AND of one region with another region
  28
  29     INPUTS
  30         region1 - pointer to a region structure
  31         region2 - pointer to a region structure
  32
  33     RESULT
  34         The resulting region or NULL in case there's no enough free memory
  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 Region *R3 = NewRegion();
  54
  55     if
  56     (
  57         R3                              &&
  58         R1->RegionRectangle             &&
  59         R2->RegionRectangle             &&
  60         overlap(R1->bounds, R2->bounds)
  61     )
  62     {
  63         if
  64         (
  65             _DoOperationBandBand
  66             (
  67                 _AndBandBand,
  68                 MinX(R1),
  69                 MinX(R2),
  70                 MinY(R1),
  71                 MinY(R2),
  72                 R1->RegionRectangle,
  73                 R2->RegionRectangle,
  74                 &R3->RegionRectangle,
  75                 &R3->bounds,
  76                 GfxBase
  77             )
  78         )
  79         {
  80             _TranslateRegionRectangles(R3->RegionRectangle, -MinX(R3), -MinY(R3));
  81         }
  82         else
  83         {
  84             DisposeRegion(R3);
  85             R3 = NULL;
  86         }
  87     }
  88
  89     return R3;
  90
  91     AROS_LIBFUNC_EXIT
  92 }