rom/graphics/orrectregionnd.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function AndRectRegion()
   6     Lang: english
   7 */
   8 #include "graphics_intern.h"
   9 #include <graphics/regions.h>
  10 #include <proto/exec.h>
  11 #include <clib/macros.h>
  12 #include "intregions.h"
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17 #include <proto/graphics.h>
  18
  19         AROS_LH2(struct Region *, OrRectRegionND,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(struct Region    *, Reg, A0),
  23         AROS_LHA(struct Rectangle *, Rect, A1),
  24
  25 /*  LOCATION */
  26         struct GfxBase *, GfxBase, 123, Graphics)
  27
  28 /*  FUNCTION
  29         Add the given Rectangle to the given Region (if not
  30         already there)
  31
  32     INPUTS
  33         region - pointer to Region structure
  34         rectangle - pointer to Rectangle structure
  35
  36     RESULT
  37         The resulting region or NULL in case there's no enough free memory
  38
  39     NOTES
  40
  41     BUGS
  42
  43     SEE ALSO
  44         AndRegionRegion(), OrRectRegion(), XorRectRegion(), ClearRectRegion()
  45         NewRegion()
  46
  47     INTERNALS
  48
  49     HISTORY
  50         27-11-96    digulla automatically created from
  51                             graphics_lib.fd and clib/graphics_protos.h
  52         16-01-97    mreckt  initial version
  53
  54 *****************************************************************************/
  55 {
  56     AROS_LIBFUNC_INIT
  57
  58     struct Region *Res = NewRegion();
  59
  60     if (IS_RECT_EVIL(Rect))
  61     {
  62         return CopyRegion(Reg);
  63     }
  64
  65     if (Res)
  66     {
  67
  68         struct RegionRectangle rr;
  69
  70         rr.bounds = *Rect;
  71         rr.Next   = NULL;
  72         rr.Prev   = NULL;
  73
  74         if
  75         (
  76             _DoOperationBandBand
  77             (
  78                 _OrBandBand,
  79                 MinX(Reg),
  80                 0,
  81                 MinY(Reg),
  82                 0,
  83                 Reg->RegionRectangle,
  84                 &rr,
  85                 &Res->RegionRectangle,
  86                 &Res->bounds,
  87                 GfxBase
  88             )
  89         )
  90         {
  91
  92             _TranslateRegionRectangles(Res->RegionRectangle, -MinX(Res), -MinY(Res));
  93
  94             return Res;
  95         }
  96
  97         DisposeRegion(Res);
  98     }
  99
 100     return NULL;
 101
 102     AROS_LIBFUNC_EXIT
 103 } /* AndRectRegion */
 104
 105
 106
 107