libmng_hlapi.c

Linux下的基于X11的图形开发环境。

  pData->iRequestlayer = 0;
  pData->iRequesttime  = 0;
  pData->bSearching    = MNG_FALSE;
  pData->iRuntime      = 0;
  pData->iSynctime     = pData->fGettickcount (hHandle);
#ifdef MNG_SUPPORT_READ
  pData->iSuspendtime  = 0;
#endif  
  pData->iStarttime    = pData->iSynctime;
  pData->iEndtime      = 0;
  pData->pCurraniobj   = pData->pFirstaniobj;

  iRetcode = process_display (pData);  /* go do it */

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

  if (pData->bTimerset)                /* indicate timer break ? */
    iRetcode = MNG_NEEDTIMERWAIT;
  else
    pData->bRunning = MNG_FALSE;       /* no breaks = end of run */

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY, MNG_LC_END)
#endif

  return iRetcode;
}
#endif /* MNG_SUPPORT_DISPLAY */

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

#ifdef MNG_SUPPORT_DISPLAY
mng_retcode MNG_DECL mng_display_resume (mng_handle hHandle)
{
  mng_datap   pData;                   /* local vars */
  mng_retcode iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_RESUME, MNG_LC_START)
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)hHandle);        /* and make it addressable */

  if (!pData->bDisplaying)             /* can we expect this call ? */
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  cleanup_errors (pData);              /* cleanup previous errors */

  if (pData->bRunning)                 /* was it running ? */
  {                                    /* are we expecting this call ? */
    if ((pData->bTimerset) || (pData->bSuspended) || (pData->bSectionwait)) 
    {
      pData->bTimerset    = MNG_FALSE; /* reset the flags */
      pData->bSectionwait = MNG_FALSE;

#ifdef MNG_SUPPORT_READ
      if (pData->bReading)             /* set during read&display ? */
      {
        if (pData->bSuspended)         /* calculate proper synchronization */
          pData->iSynctime = pData->iSynctime - pData->iSuspendtime +
                             pData->fGettickcount (hHandle);
        else
          pData->iSynctime = pData->fGettickcount (hHandle);

        pData->bSuspended = MNG_FALSE; /* now reset this flag */  
                                       /* and continue reading */
        iRetcode = read_graphic (pData);

        if (pData->bEOF)               /* already at EOF ? */
        {
          pData->bReading = MNG_FALSE; /* then we're no longer reading */
                                       /* drop invalidly stored objects */
          drop_invalid_objects (pData);
        }
      }
      else
#endif /* MNG_SUPPORT_READ */
      {                                /* synchronize timing */
        pData->iSynctime = pData->fGettickcount (hHandle);
                                       /* resume display processing */
        iRetcode = process_display (pData);
      }
    }
    else
    {
      MNG_ERROR (pData, MNG_FUNCTIONINVALID)
    }
  }
  else
  {                                    /* synchronize timing */
    pData->iSynctime = pData->fGettickcount (hHandle);
    pData->bRunning  = MNG_TRUE;       /* it's restarted again ! */
                                       /* resume display processing */
    iRetcode = process_display (pData);
  }

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

  if (pData->bSuspended)               /* read suspension ? */
  {
     iRetcode            = MNG_NEEDMOREDATA;
     pData->iSuspendtime = pData->fGettickcount ((mng_handle)pData);
  }
  else
  if (pData->bTimerset)                /* indicate timer break ? */
    iRetcode = MNG_NEEDTIMERWAIT;
  else
  if (pData->bSectionwait)             /* indicate section break ? */
    iRetcode = MNG_NEEDSECTIONWAIT;
  else
  {                                    /* no breaks = end of run */
    pData->bRunning = MNG_FALSE;

    if (pData->bFreezing)              /* trying to freeze ? */
    {                                  /* then we're there ! */
      pData->bFreezing = MNG_FALSE;
    }

    if (pData->bResetting)             /* trying to reset as well ? */
    {                                  /* full stop!!! */
      pData->bDisplaying = MNG_FALSE;

      iRetcode = mng_reset_rundata (pData);

      if (iRetcode)                    /* on error bail out */
        return iRetcode;
    }
  }
  
#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_RESUME, MNG_LC_END)
#endif

  return iRetcode;
}
#endif /* MNG_SUPPORT_DISPLAY */

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

#ifdef MNG_SUPPORT_DISPLAY
mng_retcode MNG_DECL mng_display_freeze (mng_handle hHandle)
{
  mng_datap pData;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_FREEZE, MNG_LC_START)
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)hHandle);        /* and make it addressable */
                                       /* can we expect this call ? */
  if ((!pData->bDisplaying) || (pData->bReading))
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  cleanup_errors (pData);              /* cleanup previous errors */

  if (pData->bRunning)                 /* is it running ? */
  {
    mng_retcode iRetcode;

    pData->bFreezing = MNG_TRUE;       /* indicate we need to freeze */
                                       /* continue "normal" processing */
    iRetcode = mng_display_resume (hHandle);

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

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_FREEZE, MNG_LC_END)
#endif

  return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */

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

#ifdef MNG_SUPPORT_DISPLAY
mng_retcode MNG_DECL mng_display_reset (mng_handle hHandle)
{
  mng_datap   pData;
  mng_retcode iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_RESET, MNG_LC_START)
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)hHandle);        /* and make it addressable */
                                       /* can we expect this call ? */
  if ((!pData->bDisplaying) || (pData->bReading))
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  if (!pData->bCacheplayback)          /* must store playback info to work!! */
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  cleanup_errors (pData);              /* cleanup previous errors */

  if (pData->bRunning)                 /* is it running ? */
  {
    pData->bFreezing  = MNG_TRUE;      /* indicate we need to freeze */
    pData->bResetting = MNG_TRUE;      /* indicate we're about to reset too */
                                       /* continue normal processing ? */
    iRetcode = mng_display_resume (hHandle);

    if (iRetcode)                      /* on error bail out */
      return iRetcode;
  }
  else
  {                                    /* full stop!!! */
    pData->bDisplaying = MNG_FALSE;

    iRetcode = mng_reset_rundata (pData);

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

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_RESET, MNG_LC_END)
#endif

  return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */

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

#ifdef MNG_SUPPORT_DISPLAY
mng_retcode MNG_DECL mng_display_goframe (mng_handle hHandle,
                                          mng_uint32 iFramenr)
{
  mng_datap   pData;
  mng_retcode iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_GOFRAME, MNG_LC_START)
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)hHandle);        /* and make it addressable */

  if (pData->eImagetype != mng_it_mng) /* is it an animation ? */
    MNG_ERROR (pData, MNG_NOTANANIMATION);
                                       /* can we expect this call ? */
  if ((!pData->bDisplaying) || (pData->bRunning))
    MNG_ERROR ((mng_datap)hHandle, MNG_FUNCTIONINVALID)

  if (!pData->bCacheplayback)          /* must store playback info to work!! */
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  if (iFramenr > pData->iFramecount)   /* is the parameter within bounds ? */
    MNG_ERROR (pData, MNG_FRAMENRTOOHIGH);

  cleanup_errors (pData);              /* cleanup previous errors */

  pData->iRequestframe = iFramenr;     /* go find the requested frame then */
  iRetcode = process_display (pData);

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

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_GOFRAME, MNG_LC_END)
#endif

  return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */

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

#ifdef MNG_SUPPORT_DISPLAY
mng_retcode MNG_DECL mng_display_golayer (mng_handle hHandle,
                                          mng_uint32 iLayernr)
{
  mng_datap   pData;
  mng_retcode iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_GOLAYER, MNG_LC_START)
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)hHandle);        /* and make it addressable */

  if (pData->eImagetype != mng_it_mng) /* is it an animation ? */
    MNG_ERROR (pData, MNG_NOTANANIMATION)
                                       /* can we expect this call ? */
  if ((!pData->bDisplaying) || (pData->bRunning))
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  if (!pData->bCacheplayback)          /* must store playback info to work!! */
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  if (iLayernr > pData->iLayercount)   /* is the parameter within bounds ? */
    MNG_ERROR (pData, MNG_LAYERNRTOOHIGH)

  cleanup_errors (pData);              /* cleanup previous errors */

  pData->iRequestlayer = iLayernr;     /* go find the requested layer then */
  iRetcode = process_display (pData);

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

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_GOLAYER, MNG_LC_END)
#endif

  return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */

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

#ifdef MNG_SUPPORT_DISPLAY
mng_retcode MNG_DECL mng_display_gotime (mng_handle hHandle,
                                         mng_uint32 iPlaytime)
{
  mng_datap   pData;
  mng_retcode iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_DISPLAY_GOTIME, MNG_LC_START)
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)hHandle);        /* and make it addressable */

  if (pData->eImagetype != mng_it_mng) /* is it an animation ? */
    MNG_ERROR (pData, MNG_NOTANANIMATION)
                                       /* can we expect this call ? */
  if ((!pData->bDisplaying) || (pData->bRunning))
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  if (!pData->bCacheplayback)          /* must store playback info to work!! */
    MNG_ERROR (pData, MNG_FUNCTIONINVALID)

  if (iPlaytime > pData->iPlaytime)    /* is the parameter within bounds ? */
    MNG_ERROR (pData, MNG_PLAYTIMETOOHIGH)

  cleanup_errors (pData);              /* cleanup previous errors */

  pData->iRequesttime = iPlaytime;     /* go find the requested playtime then */
  iRetcode = process_displa