rom/graphics/changevpbitmap.c

   1 /*
   2     Copyright © 1995-2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function ChangeVPBitMap()
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <graphics/gfx.h>
  11 #include <graphics/gfxbase.h>
  12 #include <graphics/view.h>
  13
  14 #include "graphics_intern.h"
  15
  16 /*****************************************************************************
  17
  18     NAME */
  19 #include <proto/graphics.h>
  20
  21         AROS_LH3(void, ChangeVPBitMap,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(struct ViewPort *, vp, A0),
  25         AROS_LHA(struct BitMap *, bm, A1),
  26         AROS_LHA(struct DBufInfo *, db, A2),
  27
  28 /*  LOCATION */
  29         struct GfxBase *, GfxBase, 157, Graphics)
  30
  31 /*  FUNCTION
  32
  33     INPUTS
  34         vp - pointer to a viewport
  35         bm - pointer to a BitMap structure. This BitMap structure must be of
  36              the same layout as the one attached to the viewport
  37              (same depth, alignment and BytesPerRow)
  38         db - pointer to a DBufInfo
  39
  40     RESULT
  41
  42     NOTES
  43
  44     EXAMPLE
  45
  46     BUGS
  47
  48     SEE ALSO
  49
  50     INTERNALS
  51
  52     HISTORY
  53
  54
  55 ******************************************************************************/
  56 {
  57     AROS_LIBFUNC_INIT
  58
  59     /* This is a very basic implementation. Screen refresh is completely not in sync with VBlank.
  60        The main problem here is that AROS completely misses VBlank interrupt. */
  61
  62     /* Insert a new bitmap, rebuild the viewport and reload current view */
  63     vp->RasInfo->BitMap = bm;
  64     MakeVPort(NULL, vp);
  65     driver_LoadView(GfxBase->ActiView, GfxBase);
  66
  67     /* Reply both messages - the displayed bitmap has been swapped */
  68     ReplyMsg(&db->dbi_SafeMessage);
  69     ReplyMsg(&db->dbi_DispMessage);
  70
  71     AROS_LIBFUNC_EXIT
  72 } /* ChangeVPBitMap */