libmng_display.c

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          break;
        }
      case mng_st_slow :
        {
          iWaitfor = (mng_uint32)((3000 * iDelay) / iTicks);
          break;
        }
      case mng_st_slowest :
        {
          iWaitfor = (mng_uint32)((8000 * iDelay) / iTicks);
          break;
        }
      default :
        {
          iWaitfor = (mng_uint32)((1000 * iDelay) / iTicks);
        }
    }
  }

  return iWaitfor;
}

/* ************************************************************************** */
/* *                                                                        * */
/* * Progressive display refresh - does the call to the refresh callback    * */
/* * and sets the timer to allow the app to perform the actual refresh to   * */
/* * the screen (eg. process its main message-loop)                         * */
/* *                                                                        * */
/* ************************************************************************** */

mng_retcode mng_display_progressive_refresh (mng_datap  pData,
                                             mng_uint32 iInterval)
{
  {                                    /* let the app refresh first ? */
    if ((pData->bRunning) && (!pData->bSkipping) &&
        (pData->iUpdatetop < pData->iUpdatebottom) && (pData->iUpdateleft < pData->iUpdateright))
    {
      if (!pData->fRefresh (((mng_handle)pData),
                            pData->iUpdateleft, pData->iUpdatetop,
                            pData->iUpdateright  - pData->iUpdateleft,
                            pData->iUpdatebottom - pData->iUpdatetop))
        MNG_ERROR (pData, MNG_APPMISCERROR)

      pData->iUpdateleft   = 0;        /* reset update-region */
      pData->iUpdateright  = 0;
      pData->iUpdatetop    = 0;
      pData->iUpdatebottom = 0;        /* reset refreshneeded indicator */
      pData->bNeedrefresh  = MNG_FALSE;
                                       /* interval requested ? */
      if ((!pData->bFreezing) && (iInterval))
      {                                /* setup the timer */
        mng_retcode iRetcode = set_delay (pData, iInterval);

        if (iRetcode)                  /* on error bail out */
          return iRetcode;
      }
    }
  }

  return MNG_NOERROR;
}

/* ************************************************************************** */
/* *                                                                        * */
/* * Generic display routines                                               * */
/* *                                                                        * */
/* ************************************************************************** */

MNG_LOCAL mng_retcode interframe_delay (mng_datap pData)
{
  mng_uint32  iWaitfor = 0;
  mng_uint32  iInterval;
  mng_uint32  iRuninterval;
  mng_retcode iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_INTERFRAME_DELAY, MNG_LC_START)
#endif

  {
    if (pData->iFramedelay > 0)        /* real delay ? */
    {                                  /* let the app refresh first ? */
      if ((pData->bRunning) && (!pData->bSkipping) &&
          (pData->iUpdatetop < pData->iUpdatebottom) && (pData->iUpdateleft < pData->iUpdateright))
        if (!pData->fRefresh (((mng_handle)pData),
                              pData->iUpdateleft,  pData->iUpdatetop,
                              pData->iUpdateright - pData->iUpdateleft,
                              pData->iUpdatebottom - pData->iUpdatetop))
          MNG_ERROR (pData, MNG_APPMISCERROR)

      pData->iUpdateleft   = 0;        /* reset update-region */
      pData->iUpdateright  = 0;
      pData->iUpdatetop    = 0;
      pData->iUpdatebottom = 0;        /* reset refreshneeded indicator */
      pData->bNeedrefresh  = MNG_FALSE;

      if (pData->bOnlyfirstframe)      /* only processing first frame after TERM ? */
      {
        pData->iFramesafterTERM++;
                                       /* did we do a frame yet ? */
        if (pData->iFramesafterTERM > 1)
        {                              /* then that's it; just stop right here ! */
          pData->pCurraniobj = MNG_NULL;
          pData->bRunning    = MNG_FALSE;

          return MNG_NOERROR;
        }
      }

      if (pData->fGettickcount)
      {                                /* get current tickcount */
        pData->iRuntime = pData->fGettickcount ((mng_handle)pData);
                                       /* calculate interval since last sync-point */
        if (pData->iRuntime < pData->iSynctime)
          iRuninterval    = pData->iRuntime + ~pData->iSynctime + 1;
        else
          iRuninterval    = pData->iRuntime - pData->iSynctime;
                                       /* calculate actual run-time */
        if (pData->iRuntime < pData->iStarttime)
          pData->iRuntime = pData->iRuntime + ~pData->iStarttime + 1;
        else
          pData->iRuntime = pData->iRuntime - pData->iStarttime;
      }
      else
      {
        iRuninterval = 0;
      }

      iWaitfor = calculate_delay (pData, pData->iFramedelay);

      if (iWaitfor > iRuninterval)     /* delay necessary ? */
        iInterval = iWaitfor - iRuninterval;
      else
        iInterval = 1;                 /* force app to process messageloop */
                                       /* set the timer ? */
      if (((pData->bRunning) || (pData->bSearching) || (pData->bReading)) &&
          (!pData->bSkipping))
      {
        iRetcode = set_delay (pData, iInterval);

        if (iRetcode)                  /* on error bail out */
          return iRetcode;
      }
    }

    if (!pData->bSkipping)             /* increase frametime in advance */
      pData->iFrametime = pData->iFrametime + iWaitfor;
                                       /* setup for next delay */
    pData->iFramedelay = pData->iNextdelay;
  }

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_INTERFRAME_DELAY, MNG_LC_END)
#endif

  return MNG_NOERROR;
}

/* ************************************************************************** */

MNG_LOCAL void set_display_routine (mng_datap pData)
{                                        /* actively running ? */
  if (((pData->bRunning) || (pData->bSearching)) && (!pData->bSkipping))
  {
    switch (pData->iCanvasstyle)         /* determine display routine */
    {
#ifndef MNG_SKIPCANVAS_RGB8
      case MNG_CANVAS_RGB8    : { pData->fDisplayrow = (mng_fptr)mng_display_rgb8;     break; }
#endif
#ifndef MNG_SKIPCANVAS_RGBA8
      case MNG_CANVAS_RGBA8   : { pData->fDisplayrow = (mng_fptr)mng_display_rgba8;    break; }
#endif
#ifndef MNG_SKIPCANVAS_RGBA8_PM
      case MNG_CANVAS_RGBA8_PM: { pData->fDisplayrow = (mng_fptr)mng_display_rgba8_pm; break; }
#endif
#ifndef MNG_SKIPCANVAS_ARGB8
      case MNG_CANVAS_ARGB8   : { pData->fDisplayrow = (mng_fptr)mng_display_argb8;    break; }
#endif
#ifndef MNG_SKIPCANVAS_ARGB8_PM
      case MNG_CANVAS_ARGB8_PM: { pData->fDisplayrow = (mng_fptr)mng_display_argb8_pm; break; }
#endif
#ifndef MNG_SKIPCANVAS_RGB8_A8
      case MNG_CANVAS_RGB8_A8 : { pData->fDisplayrow = (mng_fptr)mng_display_rgb8_a8;  break; }
#endif
#ifndef MNG_SKIPCANVAS_BGR8
      case MNG_CANVAS_BGR8    : { pData->fDisplayrow = (mng_fptr)mng_display_bgr8;     break; }
#endif
#ifndef MNG_SKIPCANVAS_BGRX8
      case MNG_CANVAS_BGRX8   : { pData->fDisplayrow = (mng_fptr)mng_display_bgrx8;    break; }
#endif
#ifndef MNG_SKIPCANVAS_BGRA8
      case MNG_CANVAS_BGRA8   : { pData->fDisplayrow = (mng_fptr)mng_display_bgra8;    break; }
#endif
#ifndef MNG_SKIPCANVAS_BGRA8_PM
      case MNG_CANVAS_BGRA8_PM: { pData->fDisplayrow = (mng_fptr)mng_display_bgra8_pm; break; }
#endif
#ifndef MNG_SKIPCANVAS_ABGR8
      case MNG_CANVAS_ABGR8   : { pData->fDisplayrow = (mng_fptr)mng_display_abgr8;    break; }
#endif
#ifndef MNG_SKIPCANVAS_ABGR8_PM
      case MNG_CANVAS_ABGR8_PM: { pData->fDisplayrow = (mng_fptr)mng_display_abgr8_pm; break; }
#endif
#ifndef MNG_SKIPCANVAS_RGB565
      case MNG_CANVAS_RGB565  : { pData->fDisplayrow = (mng_fptr)mng_display_rgb565;   break; }
#endif
#ifndef MNG_SKIPCANVAS_RGBA565
      case MNG_CANVAS_RGBA565 : { pData->fDisplayrow = (mng_fptr)mng_display_rgba565;  break; }
#endif
#ifndef MNG_SKIPCANVAS_BGR565
      case MNG_CANVAS_BGR565  : { pData->fDisplayrow = (mng_fptr)mng_display_bgr565;   break; }
#endif
#ifndef MNG_SKIPCANVAS_BGRA565
      case MNG_CANVAS_BGRA565 : { pData->fDisplayrow = (mng_fptr)mng_display_bgra565;  break; }
#endif

#ifndef MNG_NO_16BIT_SUPPORT
/*      case MNG_CANVAS_RGB16   : { pData->fDisplayrow = (mng_fptr)mng_display_rgb16;    break; } */
/*      case MNG_CANVAS_RGBA16  : { pData->fDisplayrow = (mng_fptr)mng_display_rgba16;   break; } */
/*      case MNG_CANVAS_ARGB16  : { pData->fDisplayrow = (mng_fptr)mng_display_argb16;   break; } */
/*      case MNG_CANVAS_BGR16   : { pData->fDisplayrow = (mng_fptr)mng_display_bgr16;    break; } */
/*      case MNG_CANVAS_BGRA16  : { pData->fDisplayrow = (mng_fptr)mng_display_bgra16;   break; } */
/*      case MNG_CANVAS_ABGR16  : { pData->fDisplayrow = (mng_fptr)mng_display_abgr16;   break; } */
#endif
/*      case MNG_CANVAS_INDEX8  : { pData->fDisplayrow = (mng_fptr)mng_display_index8;   break; } */
/*      case MNG_CANVAS_INDEXA8 : { pData->fDisplayrow = (mng_fptr)mng_display_indexa8;  break; } */
/*      case MNG_CANVAS_AINDEX8 : { pData->fDisplayrow = (mng_fptr)mng_display_aindex8;  break; } */
/*      case MNG_CANVAS_GRAY8   : { pData->fDisplayrow = (mng_fptr)mng_display_gray8;    break; } */
/*      case MNG_CANVAS_AGRAY8  : { pData->fDisplayrow = (mng_fptr)mng_display_agray8;   break; } */
/*      case MNG_CANVAS_GRAYA8  : { pData->fDisplayrow = (mng_fptr)mng_display_graya8;   break; } */
#ifndef MNG_NO_16BIT_SUPPORT
/*      case MNG_CANVAS_GRAY16  : { pData->fDisplayrow = (mng_fptr)mng_display_gray16;   break; } */
/*      case MNG_CANVAS_GRAYA16 : { pData->fDisplayrow = (mng_fptr)mng_display_graya16;  break; } */
/*      case MNG_CANVAS_AGRAY16 : { pData->fDisplayrow = (mng_fptr)mng_display_agray16;  break; } */
#endif
/*      case MNG_CANVAS_DX15    : { pData->fDisplayrow = (mng_fptr)mng_display_dx15;     break; } */
/*      case MNG_CANVAS_DX16    : { pData->fDisplayrow = (mng_fptr)mng_display_dx16;     break; } */
    }
  }

  return;
}

/* ************************************************************************** */

MNG_LOCAL mng_retcode load_bkgdlayer (mng_datap pData)
{
#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_LOAD_BKGDLAYER, MNG_LC_START)
#endif
                                       /* actively running ? */
  if (((pData->bRunning) || (pData->bSearching)) && (!pData->bSkipping))
  {
    mng_int32   iY;
    mng_retcode iRetcode;
    mng_bool    bColorcorr   = MNG_FALSE;
                                       /* save values */
    mng_int32   iDestl       = pData->iDestl;
    mng_int32   iDestr       = pData->iDestr;
    mng_int32   iDestt       = pData->iDestt;
    mng_int32   iDestb       = pData->iDestb;
    mng_int32   iSourcel     = pData->iSourcel;
    mng_int32   iSourcer     = pData->iSourcer;
    mng_int32   iSourcet     = pData->iSourcet;
    mng_int32   iSourceb     = pData->iSourceb;
    mng_int8    iPass        = pData->iPass;
    mng_int32   iRow         = pData->iRow;
    mng_int32   iRowinc      = pData->iRowinc;
    mng_int32   iCol         = pData->iCol;
    mng_int32   iColinc      = pData->iColinc;
    mng_int32   iRowsamples  = pData->iRowsamples;
    mng_int32   iRowsize     = pData->iRowsize;
    mng_uint8p  pPrevrow     = pData->pPrevrow;
    mng_uint8p  pRGBArow     = pData->pRGBArow;
    mng_bool    bIsRGBA16    = pData->bIsRGBA16;
    mng_bool    bIsOpaque    = pData->bIsOpaque;
    mng_fptr    fCorrectrow  = pData->fCorrectrow;
    mng_fptr    fDisplayrow  = pData->fDisplayrow;
    mng_fptr    fRetrieverow = pData->fRetrieverow;
    mng_objectp pCurrentobj  = pData->pCurrentobj;
    mng_objectp pRetrieveobj = pData->pRetrieveobj;