rom/graphics/orrectregion.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function OrRectRegion()
   6     Lang: english
   7 */
   8 #include <exec/types.h>
   9 #include <exec/memory.h>
  10 #include <graphics/regions.h>
  11 #include <proto/exec.h>
  12 #include "intregions.h"
  13 #include "graphics_intern.h"
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18 #include <proto/graphics.h>
  19
  20         AROS_LH2(BOOL, OrRectRegion,
  21
  22 /*  SYNOPSIS */
  23         AROS_LHA(struct Region    *, Reg,  A0),
  24         AROS_LHA(struct Rectangle *, Rect, A1),
  25
  26 /*  LOCATION */
  27         struct GfxBase *, GfxBase, 85, Graphics)
  28
  29 /*  FUNCTION
  30         Add the given Rectangle to the given Region (if not
  31         already there)
  32
  33     INPUTS
  34         region - pointer to Region structure
  35         rectangle - pointer to Rectangle structure
  36
  37     RESULT
  38         TRUE if the operation was successful, else FALSE
  39         (out of memory)
  40
  41     NOTES
  42         All relevant data is copied, you may throw away the
  43         given rectangle after calling this function
  44
  45     EXAMPLE
  46
  47     BUGS
  48
  49     SEE ALSO
  50         AndRectRegion(), XorRectRegion(), ClearRectRegion()
  51
  52     INTERNALS
  53
  54     HISTORY
  55         27-11-96    digulla automatically created from
  56                             graphics_lib.fd and clib/graphics_protos.h
  57         16-01-97    mreckt  initial version
  58
  59 *****************************************************************************/
  60 {
  61     AROS_LIBFUNC_INIT
  62
  63     struct Region Res;
  64     struct RegionRectangle rr;
  65
  66     InitRegion(&Res);
  67
  68     rr.bounds = *Rect;
  69     rr.Next   = NULL;
  70     rr.Prev   = NULL;
  71
  72     if
  73     (
  74         _DoOperationBandBand
  75         (
  76             _OrBandBand,
  77             MinX(Reg),
  78             0,
  79             MinY(Reg),
  80             0,
  81             Reg->RegionRectangle,
  82             &rr,
  83             &Res.RegionRectangle,
  84             &Res.bounds,
  85             GfxBase
  86         )
  87     )
  88     {
  89         ClearRegion(Reg);
  90
  91         *Reg = Res;
  92
  93         _TranslateRegionRectangles(Res.RegionRectangle, -MinX(&Res), -MinY(&Res));
  94
  95         return TRUE;
  96     }
  97
  98     return FALSE;
  99
 100     AROS_LIBFUNC_EXIT
 101 } /* OrRectRegion */