libmng_hlapi.c

奇趣公司比较新的qt/emd版本

#ifdef MNG_SUPPORT_READ
  pData->bSuspensionmode       = MNG_FALSE;
  pData->iSuspendbufsize       = 0;
  pData->pSuspendbuf           = MNG_NULL;
  pData->pSuspendbufnext       = MNG_NULL;
  pData->iSuspendbufleft       = 0;
  pData->iChunklen             = 0;
  pData->pReadbufnext          = MNG_NULL;
  pData->pLargebufnext         = MNG_NULL;

  pData->pFirstpushchunk       = MNG_NULL;
  pData->pLastpushchunk        = MNG_NULL;
  pData->pFirstpushdata        = MNG_NULL;
  pData->pLastpushdata         = MNG_NULL;
#endif

#ifdef MNG_INCLUDE_ZLIB
  mngzlib_initialize (pData);          /* initialize zlib structures and such */
                                       /* default zlib compression parameters */
  pData->iZlevel               = MNG_ZLIB_LEVEL;
  pData->iZmethod              = MNG_ZLIB_METHOD;
  pData->iZwindowbits          = MNG_ZLIB_WINDOWBITS;
  pData->iZmemlevel            = MNG_ZLIB_MEMLEVEL;
  pData->iZstrategy            = MNG_ZLIB_STRATEGY;
                                       /* default maximum IDAT data size */
  pData->iMaxIDAT              = MNG_MAX_IDAT_SIZE;
#endif

#ifdef MNG_INCLUDE_JNG                 /* default IJG compression parameters */
  pData->eJPEGdctmethod        = MNG_JPEG_DCT;
  pData->iJPEGquality          = MNG_JPEG_QUALITY;
  pData->iJPEGsmoothing        = MNG_JPEG_SMOOTHING;
  pData->bJPEGcompressprogr    = MNG_JPEG_PROGRESSIVE;
  pData->bJPEGcompressopt      = MNG_JPEG_OPTIMIZED;
                                       /* default maximum JDAT data size */
  pData->iMaxJDAT              = MNG_MAX_JDAT_SIZE;
#endif

  mng_reset ((mng_handle)pData);

#ifdef MNG_SUPPORT_TRACE
  if (mng_trace (pData, MNG_FN_INITIALIZE, MNG_LC_END))
  {
    MNG_FREEX (pData, pData, sizeof (mng_data));
    return MNG_NULL;
  }
#endif

  return (mng_handle)pData;            /* if we get here, we're in business */
}

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

mng_retcode MNG_DECL mng_reset (mng_handle hHandle)
{
  mng_datap pData;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (((mng_datap)hHandle), MNG_FN_RESET, MNG_LC_START);
#endif

  MNG_VALIDHANDLE (hHandle)            /* check validity handle */
  pData = ((mng_datap)(hHandle));      /* address main structure */

#ifdef MNG_SUPPORT_DISPLAY
#ifndef MNG_SKIPCHUNK_SAVE
  mng_drop_savedata (pData);           /* cleanup saved-data from SAVE/SEEK */
#endif
#endif

#if defined(MNG_SUPPORT_DISPLAY) && defined(MNG_FULL_CMS)
  mng_clear_cms (pData);               /* cleanup left-over cms stuff if any */
#endif

#if defined(MNG_SUPPORT_DISPLAY) && defined(MNG_INCLUDE_JNG)
  mngjpeg_cleanup (pData);             /* cleanup jpeg stuff */
#endif

#ifdef MNG_INCLUDE_ZLIB
  if (pData->bInflating)               /* if we've been inflating */
  {
#ifdef MNG_INCLUDE_DISPLAY_PROCS
    mng_cleanup_rowproc (pData);       /* cleanup row-processing, */
#endif
    mngzlib_inflatefree (pData);       /* cleanup inflate! */
  }
#endif /* MNG_INCLUDE_ZLIB */

#ifdef MNG_SUPPORT_READ
  if ((pData->bReading) && (!pData->bEOF))
    mng_process_eof (pData);           /* cleanup app streaming */
                                       /* cleanup default read buffers */
  MNG_FREE (pData, pData->pReadbuf,    pData->iReadbufsize);
  MNG_FREE (pData, pData->pLargebuf,   pData->iLargebufsize);
  MNG_FREE (pData, pData->pSuspendbuf, pData->iSuspendbufsize);

  while (pData->pFirstpushdata)        /* release any pushed data & chunks */
    mng_release_pushdata (pData);
  while (pData->pFirstpushchunk)
    mng_release_pushchunk (pData);
#endif

#ifdef MNG_SUPPORT_WRITE               /* cleanup default write buffer */
  MNG_FREE (pData, pData->pWritebuf, pData->iWritebufsize);
#endif

#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
  mng_drop_chunks  (pData);            /* drop stored chunks (if any) */
#endif

#ifdef MNG_SUPPORT_DISPLAY
  mng_drop_objects (pData, MNG_TRUE);  /* drop stored objects (if any) */

#ifndef MNG_SKIPCHUNK_iCCP
  if (pData->iGlobalProfilesize)       /* drop global profile (if any) */
    MNG_FREEX (pData, pData->pGlobalProfile, pData->iGlobalProfilesize);
#endif
#endif

  pData->eSigtype              = mng_it_unknown;
  pData->eImagetype            = mng_it_unknown;
  pData->iWidth                = 0;    /* these are unknown yet */
  pData->iHeight               = 0;
  pData->iTicks                = 0;
  pData->iLayercount           = 0;
  pData->iFramecount           = 0;
  pData->iPlaytime             = 0;
  pData->iSimplicity           = 0;
  pData->iAlphadepth           = 16;   /* assume the worst! */

  pData->iImagelevel           = 0;    /* no image encountered */

  pData->iMagnify              = 0;    /* 1-to-1 display */
  pData->iOffsetx              = 0;    /* no offsets */
  pData->iOffsety              = 0;
  pData->iCanvaswidth          = 0;    /* let the app decide during processheader */
  pData->iCanvasheight         = 0;
                                       /* so far, so good */
  pData->iErrorcode            = MNG_NOERROR;
  pData->iSeverity             = 0;
  pData->iErrorx1              = 0;
  pData->iErrorx2              = 0;
  pData->zErrortext            = MNG_NULL;

#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
                                       /* let's assume the best scenario */
#ifndef MNG_NO_OLD_VERSIONS
  pData->bPreDraft48           = MNG_FALSE;
#endif
                                       /* the unknown chunk */
  pData->iChunkname            = MNG_UINT_HUH;
  pData->iChunkseq             = 0;
  pData->pFirstchunk           = MNG_NULL;
  pData->pLastchunk            = MNG_NULL;
                                       /* nothing processed yet */
  pData->bHasheader            = MNG_FALSE;
  pData->bHasMHDR              = MNG_FALSE;
  pData->bHasIHDR              = MNG_FALSE;
  pData->bHasBASI              = MNG_FALSE;
  pData->bHasDHDR              = MNG_FALSE;
#ifdef MNG_INCLUDE_JNG
  pData->bHasJHDR              = MNG_FALSE;
  pData->bHasJSEP              = MNG_FALSE;
  pData->bHasJDAA              = MNG_FALSE;
  pData->bHasJDAT              = MNG_FALSE;
#endif
  pData->bHasPLTE              = MNG_FALSE;
  pData->bHasTRNS              = MNG_FALSE;
  pData->bHasGAMA              = MNG_FALSE;
  pData->bHasCHRM              = MNG_FALSE;
  pData->bHasSRGB              = MNG_FALSE;
  pData->bHasICCP              = MNG_FALSE;
  pData->bHasBKGD              = MNG_FALSE;
  pData->bHasIDAT              = MNG_FALSE;

  pData->bHasSAVE              = MNG_FALSE;
  pData->bHasBACK              = MNG_FALSE;
  pData->bHasFRAM              = MNG_FALSE;
  pData->bHasTERM              = MNG_FALSE;
  pData->bHasLOOP              = MNG_FALSE;
                                       /* there's no global stuff yet either */
  pData->bHasglobalPLTE        = MNG_FALSE;
  pData->bHasglobalTRNS        = MNG_FALSE;
  pData->bHasglobalGAMA        = MNG_FALSE;
  pData->bHasglobalCHRM        = MNG_FALSE;
  pData->bHasglobalSRGB        = MNG_FALSE;
  pData->bHasglobalICCP        = MNG_FALSE;

  pData->iDatawidth            = 0;    /* no IHDR/BASI/DHDR done yet */
  pData->iDataheight           = 0;
  pData->iBitdepth             = 0;
  pData->iColortype            = 0;
  pData->iCompression          = 0;
  pData->iFilter               = 0;
  pData->iInterlace            = 0;

#ifdef MNG_INCLUDE_JNG
  pData->iJHDRcolortype        = 0;    /* no JHDR data */
  pData->iJHDRimgbitdepth      = 0;
  pData->iJHDRimgcompression   = 0;
  pData->iJHDRimginterlace     = 0;
  pData->iJHDRalphabitdepth    = 0;
  pData->iJHDRalphacompression = 0;
  pData->iJHDRalphafilter      = 0;
  pData->iJHDRalphainterlace   = 0;
#endif

#endif /* MNG_SUPPORT_READ || MNG_SUPPORT_WRITE */

#ifdef MNG_SUPPORT_READ                /* no reading done */
  pData->bReading              = MNG_FALSE;
  pData->bHavesig              = MNG_FALSE;
  pData->bEOF                  = MNG_FALSE;
  pData->iReadbufsize          = 0;
  pData->pReadbuf              = MNG_NULL;

  pData->iLargebufsize         = 0;
  pData->pLargebuf             = MNG_NULL;

  pData->iSuspendtime          = 0;
  pData->bSuspended            = MNG_FALSE;
  pData->iSuspendpoint         = 0;

  pData->pSuspendbufnext       = pData->pSuspendbuf;
  pData->iSuspendbufleft       = 0;
#endif /* MNG_SUPPORT_READ */

#ifdef MNG_SUPPORT_WRITE               /* no creating/writing done */
  pData->bCreating             = MNG_FALSE;
  pData->bWriting              = MNG_FALSE;
  pData->iFirstchunkadded      = 0;
  pData->iWritebufsize         = 0;
  pData->pWritebuf             = MNG_NULL;
#endif /* MNG_SUPPORT_WRITE */

#ifdef MNG_SUPPORT_DISPLAY             /* done nuttin' yet */
  pData->bDisplaying           = MNG_FALSE;
  pData->iFrameseq             = 0;
  pData->iLayerseq             = 0;
  pData->iFrametime            = 0;

  pData->iTotallayers          = 0;
  pData->iTotalframes          = 0;
  pData->iTotalplaytime        = 0;

  pData->bSkipping             = MNG_FALSE;

#ifdef MNG_SUPPORT_DYNAMICMNG
  pData->bDynamic              = MNG_FALSE;
  pData->bRunningevent         = MNG_FALSE;
  pData->bStopafterseek        = MNG_FALSE;
  pData->iEventx               = 0;
  pData->iEventy               = 0;
  pData->pLastmousemove        = MNG_NULL;
#endif

  pData->iRequestframe         = 0;
  pData->iRequestlayer         = 0;
  pData->iRequesttime          = 0;
  pData->bSearching            = MNG_FALSE;

  pData->bRestorebkgd          = MNG_FALSE;

  pData->iRuntime              = 0;
  pData->iSynctime             = 0;
  pData->iStarttime            = 0;
  pData->iEndtime              = 0;
  pData->bRunning              = MNG_FALSE;
  pData->bTimerset             = MNG_FALSE;
  pData->iBreakpoint           = 0;
  pData->bSectionwait          = MNG_FALSE;
  pData->bFreezing             = MNG_FALSE;
  pData->bResetting            = MNG_FALSE;
  pData->bNeedrefresh          = MNG_FALSE;
  pData->bMisplacedTERM        = MNG_FALSE;
  pData->bOnlyfirstframe       = MNG_FALSE;
  pData->iFramesafterTERM      = 0;
                                       /* these don't exist yet */
  pData->pCurrentobj           = MNG_NULL;
  pData->pCurraniobj           = MNG_NULL;
  pData->pTermaniobj           = MNG_NULL;
  pData->pLastclone            = MNG_NULL;
  pData->pStoreobj             = MNG_NULL;
  pData->pStorebuf             = MNG_NULL;
  pData->pRetrieveobj          = MNG_NULL;
                                       /* no saved data ! */
  pData->pSavedata             = MNG_NULL;

  pData->iUpdateleft           = 0;    /* no region updated yet */
  pData->iUpdateright          = 0;
  pData->iUpdatetop            = 0;
  pData->iUpdatebottom         = 0;

  pData->iPass                 = -1;   /* interlacing stuff and temp buffers */
  pData->iRow                  = 0;
  pData->iRowinc               = 1;
  pData->iCol                  = 0;
  pData->iColinc               = 1;
  pData->iRowsamples           = 0;
  pData->iSamplemul            = 0;
  pData->iSampleofs            = 0;
  pData->iSamplediv            = 0;
  pData->iRowsize              = 0;
  pData->iRowmax               = 0;
  pData->iFilterofs            = 0;
  pData->iPixelofs             = 1;
  pData->iLevel0               = 0;
  pData->iLevel1               = 0;
  pData->iLevel2               = 0;
  pData->iLevel3               = 0;
  pData->pWorkrow              = MNG_NULL;
  pData->pPrevrow              = MNG_NULL;
  pData->pRGBArow              = MNG_NULL;
  pData->bIsRGBA16             = MNG_TRUE;
  pData->bIsOpaque             = MNG_TRUE;
  pData->iFilterbpp            = 1;

  pData->iSourcel              = 0;    /* always initialized just before */
  pData->iSourcer              = 0;    /* c