rom/graphics/changevpbitmap.c

   1 /*
   2     Copyright © 1995-2011, 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 #include <hidd/graphics.h>
  14
  15 #include "graphics_intern.h"
  16 #include "gfxfuncsupport.h"
  17
  18 /*****************************************************************************
  19
  20     NAME */
  21 #include <proto/graphics.h>
  22
  23         AROS_LH3(void, ChangeVPBitMap,
  24
  25 /*  SYNOPSIS */
  26         AROS_LHA(struct ViewPort *, vp, A0),
  27         AROS_LHA(struct BitMap *, bm, A1),
  28         AROS_LHA(struct DBufInfo *, db, A2),
  29
  30 /*  LOCATION */
  31         struct GfxBase *, GfxBase, 157, Graphics)
  32
  33 /*  FUNCTION
  34
  35     INPUTS
  36         vp - pointer to a viewport
  37         bm - pointer to a BitMap structure. This BitMap structure must be of
  38              the same layout as the one attached to the viewport
  39              (same depth, alignment and BytesPerRow)
  40         db - pointer to a DBufInfo
  41
  42     RESULT
  43
  44     NOTES
  45
  46     EXAMPLE
  47
  48     BUGS
  49
  50     SEE ALSO
  51
  52     INTERNALS
  53
  54     HISTORY
  55
  56
  57 ******************************************************************************/
  58 {
  59     AROS_LIBFUNC_INIT
  60
  61     struct ViewPort *vp2;
  62
  63     /* This is a very basic implementation. Screen refresh is completely not in sync with VBlank.
  64        The main problem here is that AROS completely misses VBlank interrupt. */
  65
  66     /* Insert a new bitmap and rebuild the viewport */
  67     vp->RasInfo->BitMap = bm;
  68     MakeVPort(GfxBase->ActiView, vp);
  69
  70     ObtainSemaphore(GfxBase->ActiViewCprSemaphore);
  71
  72     if (GfxBase->ActiView)
  73     {
  74         for (vp2 = GfxBase->ActiView->ViewPort; vp2; vp2 = vp2->Next)
  75         {
  76             /* First check if the updated ViewPort is currently on display */
  77             if (vp2 == vp)
  78             {
  79                 if (!(vp2->Modes & VP_HIDE))
  80                 {
  81                     /*
  82                      * If yes, we need to rebuild driver's display. Look up the driver
  83                      * and its ViewPorts chain and redisplay it.
  84                      * We don't check against vpd == NULL because we already know
  85                      * there's at least one ViewPort (our one) in the chain.
  86                      */
  87                     struct monitor_driverdata *mdd = GET_VP_DRIVERDATA(vp);
  88                     struct HIDD_ViewPortData *vpd = driver_FindViewPorts(GfxBase->ActiView, mdd, GfxBase);
  89
  90                     HIDD_Gfx_PrepareViewPorts(mdd->gfxhidd, vpd, GfxBase->ActiView);
  91                     driver_LoadViewPorts(vpd, GfxBase->ActiView, mdd, GfxBase);
  92                 }
  93
  94                 break;
  95             }
  96         }
  97     }
  98
  99     ReleaseSemaphore(GfxBase->ActiViewCprSemaphore);
 100
 101     /* Reply both messages - the displayed bitmap has been swapped */
 102     ReplyMsg(&db->dbi_SafeMessage);
 103     ReplyMsg(&db->dbi_DispMessage);
 104
 105     AROS_LIBFUNC_EXIT
 106 } /* ChangeVPBitMap */