rom/graphics/syncsbitmap.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function SyncSBitMap()
   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, SyncSBitMap,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(struct Layer *, l, A0),
  21
  22 /*  LOCATION */
  23         struct GfxBase *, GfxBase, 74, Graphics)
  24
  25 /*  FUNCTION
  26         If the layer has a superbitmap all the parts that are visible will
  27         be copied into the superbitmap. This is usually not done except when
  28         parts of a superbitmapped layer become hidden the visible parts are
  29         stored into the superbitmap.
  30
  31     INPUTS
  32         l  - pointer to superbitmapped layer
  33
  34     RESULT
  35         The superbitmap will be synchronized with the visible part. The
  36         superbitmap attached to the layer will be up-to-date with what's
  37         really in the layer.
  38
  39     NOTES
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46         CopySBitMap()
  47
  48     INTERNALS
  49
  50     HISTORY
  51
  52 *****************************************************************************/
  53 {
  54   AROS_LIBFUNC_INIT
  55
  56   struct ClipRect * CR = l->ClipRect;
  57
  58   if (NULL == l->SuperBitMap || (l->Flags & LAYERSUPER) == 0)
  59     return;
  60
  61   while (NULL != CR)
  62   {
  63     /* a cliprect of a superbitmapped layer is visible if lobs==NULL*/
  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->rp->BitMap,
  69                 CR->bounds.MinX,
  70                 CR->bounds.MinY,
  71                 l->SuperBitMap,
  72                 CR->bounds.MinX - l->bounds.MinX - l->Scroll_X,
  73                 CR->bounds.MinY - l->bounds.MinY - l->Scroll_Y,
  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 } /* SyncSBitMap */
  86