rom/graphics/eraserect.c

   1 /*
   2     Copyright © 1995-2008, The AROS Development Team. All rights reserved.
   3     $Id$    $Log
   4
   5     Desc: Graphics function EraseRect()
   6     Lang: english
   7 */
   8 #include <aros/debug.h>
   9 #include "graphics_intern.h"
  10 #include <graphics/rastport.h>
  11 #include <aros/asmcall.h>
  12 #include <utility/hooks.h>
  13 #include <proto/oop.h>
  14 #include <proto/layers.h>
  15 #include "gfxfuncsupport.h"
  16
  17 #define LayersBase (struct LayersBase *)(GfxBase->gb_LayersBase)
  18
  19 /*****************************************************************************
  20
  21     NAME */
  22 #include <graphics/rastport.h>
  23 #include <proto/graphics.h>
  24
  25         AROS_LH5(void, EraseRect,
  26
  27 /*  SYNOPSIS */
  28         AROS_LHA(struct RastPort *, rp, A1),
  29         AROS_LHA(LONG             , xMin, D0),
  30         AROS_LHA(LONG             , yMin, D1),
  31         AROS_LHA(LONG             , xMax, D2),
  32         AROS_LHA(LONG             , yMax, D3),
  33
  34 /*  LOCATION */
  35         struct GfxBase *, GfxBase, 135, Graphics)
  36
  37 /*  FUNCTION
  38         Fill a rectangular area with the current BackFill hook.
  39         If layered the BackFill hook is used.
  40         If non-layered the region is cleared.
  41
  42     INPUTS
  43         rp        - destination RastPort
  44         xMin,yMin - upper left corner
  45         xMax,YMax - lower right corner
  46
  47     RESULT
  48
  49     NOTES
  50
  51     EXAMPLE
  52
  53     BUGS
  54
  55     SEE ALSO
  56
  57     INTERNALS
  58
  59     HISTORY
  60         29-10-95    digulla automatically created from
  61                             graphics_lib.fd and clib/graphics_protos.h
  62
  63 *****************************************************************************/
  64 {
  65     AROS_LIBFUNC_INIT
  66
  67     struct Rectangle r;
  68     struct Hook     *h = LAYERS_BACKFILL;
  69
  70     if (!LayersBase) {
  71         rp->DrawMode ^= INVERSVID;
  72         RectFill(rp, xMin, yMin, xMax, yMax);
  73         rp->DrawMode ^= INVERSVID;
  74         return;
  75     }
  76
  77     FIX_GFXCOORD(xMin);
  78     FIX_GFXCOORD(yMin);
  79     FIX_GFXCOORD(xMax);
  80     FIX_GFXCOORD(yMax);
  81
  82     r.MinX = xMin;
  83     r.MinY = yMin;
  84     r.MaxX = xMax;
  85     r.MaxY = yMax;
  86
  87     if (rp->Layer)
  88     {
  89         LockLayerRom(rp->Layer);
  90         h = rp->Layer->BackFill;
  91     }
  92
  93     DoHookClipRects(h, rp, &r);
  94
  95     if (rp->Layer)
  96     {
  97         UnlockLayerRom(rp->Layer);
  98     }
  99
 100     ReturnVoid("EraseRect");
 101
 102     AROS_LIBFUNC_EXIT
 103
 104 } /* EraseRect */
 105
 106 /****************************************************************************************/
 107
 108 #undef LayersBase
 109
 110 /****************************************************************************************/
 111