rom/graphics/copysbitmap.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function CopySBitMap()
   6     Lang: english
   7 */
   8 #include <graphics/layers.h>
   9 #include <graphics/clip.h>
  10 #include "graphics_intern.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <proto/graphics.h>
  16
  17         AROS_LH1(void, CopySBitMap,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(struct Layer *, l, A0),
  21
  22 /*  LOCATION */
  23         struct GfxBase *, GfxBase, 75, Graphics)
  24
  25 /*  FUNCTION
  26         If the layer has a superbitmap all the parts that are visible will
  27         be refreshed with what is in the superbitmap. This function should
  28         be called after the SuperBitMap of the layer was synchronized with
  29         SyncSBitMap() and manipulated.
  30
  31     INPUTS
  32         l  - pointer to superbitmapped layer
  33
  34     RESULT
  35         The layer will show the true contents of the superbitmap that is
  36         attached to it
  37
  38     NOTES
  39
  40     EXAMPLE
  41
  42     BUGS
  43
  44     SEE ALSO
  45         SyncSBitMap()
  46
  47     INTERNALS
  48
  49     HISTORY
  50
  51 *****************************************************************************/
  52 {
  53   AROS_LIBFUNC_INIT
  54
  55   struct ClipRect * CR = l->ClipRect;
  56
  57   if (NULL == l->SuperBitMap || (l->Flags & LAYERSUPER) == 0)
  58     return;
  59
  60   while (NULL != CR)
  61   {
  62     /* a cliprect of a superbitmapped layer is visible if lobs==NULL,
  63        only these I have to copy into the rastport's bitmap */
  64     if (NULL == CR->lobs)
  65     {
  66       /* I have to backup this part into the SuperBitMap! I find the
  67          data in the bitmap of the rastport of this layer */
  68       BltBitMap(l->SuperBitMap,
  69                 CR->bounds.MinX - l->bounds.MinX - l->Scroll_X,
  70                 CR->bounds.MinY - l->bounds.MinY - l->Scroll_Y,
  71                 l->rp->BitMap,
  72                 CR->bounds.MinX,
  73                 CR->bounds.MinY,
  74                 CR->bounds.MaxX - CR->bounds.MinX + 1,
  75                 CR->bounds.MaxY - CR->bounds.MinY + 1,
  76                 0x0c0,
  77                 0xff,
  78                 NULL
  79             );
  80     }
  81     CR = CR->Next;
  82   }
  83
  84   AROS_LIBFUNC_EXIT
  85 } /* CopySBitMap */