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/* ************************************************************************** */
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/* * project : libmng * */
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/* * file : libmng_data.h copyright (c) 2000 G.Juyn * */
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/* * version : 1.0.2 * */
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/* * file : libmng_data.h copyright (c) 2000-2004 G.Juyn * */
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/* * version : 1.0.8 * */
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/* * purpose : main data structure definition * */
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/* * author : G.Juyn * */
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/* * web : http://www.3-t.com * */
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/* * email : mailto:info@3-t.com * */
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/* * comment : Definition of the library main data structure * */
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/* * 1.0.2 - 06/25/2001 - G.Juyn * */
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/* * - added option to turn off progressive refresh * */
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/* * 1.0.5 - 07/08/2002 - G.Juyn * */
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/* * - B578572 - removed eMNGma hack (thanks Dimitri!) * */
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/* * 1.0.5 - 07/16/2002 - G.Juyn * */
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/* * - B581625 - large chunks fail with suspension reads * */
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/* * 1.0.5 - 08/15/2002 - G.Juyn * */
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/* * - completed PROM support * */
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/* * 1.0.5 - 09/15/2002 - G.Juyn * */
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/* * - fixed LOOP iteration=0 special case * */
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/* * 1.0.5 - 09/20/2002 - G.Juyn * */
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/* * - finished support for BACK image & tiling * */
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/* * 1.0.5 - 10/07/2002 - G.Juyn * */
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/* * - added another fix for misplaced TERM chunk * */
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/* * - completed support for condition=2 in TERM chunk * */
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/* * 1.0.5 - 10/20/2002 - G.Juyn * */
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/* * - fixed processing for multiple objects in MAGN * */
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/* * - fixed display of visible target of PAST operation * */
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/* * 1.0.5 - 11/07/2002 - G.Juyn * */
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/* * - added support to get totals after mng_read() * */
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/* * 1.0.5 - 24/02/2003 - G.Juyn * */
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/* * - B683152 - libjpeg suspension not always honored correctly* */
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/* * 1.0.6 - 04/11/2003 - G.Juyn * */
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/* * - B719420 - fixed several MNG_APP_CMS problems * */
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/* * 1.0.6 - 07/05/2003 - G. R-P * */
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/* * - optionally use zlib's crc32() function * */
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/* * 1.0.6 - 07/29/2003 - G.R-P * */
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/* * - added SKIPCHUNK conditionals around PAST chunk support * */
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/* * 1.0.6 - 08/17/2003 - G.R-P * */
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/* * - added iPNGdepth member to pData structure * */
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/* * 1.0.7 - 03/10/2004 - G.R-P * */
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/* * - added conditionals around openstream/closestream * */
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/* * 1.0.7 - 03/24/2004 - G.R-P * */
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/* * - added more SKIPCHUNK conditionals * */
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/* * 1.0.8 - 04/02/2004 - G.Juyn * */
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/* * - added CRC existence & checking flags * */
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/* * 1.0.8 - 04/10/2004 - G.Juyn * */
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/* * - added data-push mechanisms for specialized decoders * */
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/* ************************************************************************** */
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#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
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mng_uint32 iGlobalGamma; /* global gAMA fields */
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#ifndef MNG_SKIPCHUNK_cHRM
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mng_uint32 iGlobalWhitepointx; /* global cHRM fields */
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mng_uint32 iGlobalWhitepointy;
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mng_uint32 iGlobalPrimaryredx;
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/* ************************************************************************** */
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/* * Internal buffer structure for data push mechanisms * */
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/* ************************************************************************** */
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mng_ptr pNext; /* for linked list */
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mng_ptr pData; /* used for chunks & data */
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mng_uint8p pDatanext; /* only used for data */
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mng_uint32 iRemaining;
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typedef mng_pushdata * mng_pushdatap;
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/* ************************************************************************** */
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/* * The main libmng data structure * */
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/* * The handle used in all functions points to this structure which * */
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mng_uint32 iSimplicity;
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mng_uint8 iAlphadepth; /* indicates expected alpha-depth */
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mng_uint32 iImagelevel; /* level an image inside a stream */
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mng_uint32 iImagelevel; /* level of image inside a stream */
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mng_uint32 iCanvasstyle; /* layout of the drawing-canvas */
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mng_uint32 iBkgdstyle; /* layout of the background-canvas */
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mng_bool bStorechunks; /* switch for storing chunkdata */
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mng_bool bSectionbreaks; /* indicate NEEDSECTIONWAIT breaks */
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mng_bool bCacheplayback; /* switch to cache playback info */
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mng_bool bDoProgressive; /* progressive refresh for large images */
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mng_bool bDoProgressive; /* progressive refresh for large images */
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mng_uint32 iCrcmode; /* CRC existence & checking flags */
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mng_speedtype iSpeed; /* speed-modifier for animations */
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mng_memalloc fMemalloc; /* callback pointers */
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mng_memfree fMemfree; /* initially nulled */
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mng_releasedata fReleasedata;
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#ifndef MNG_NO_OPEN_CLOSE_STREAM
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mng_openstream fOpenstream;
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mng_closestream fClosestream;
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mng_readdata fReaddata;
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mng_writedata fWritedata;
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mng_errorproc fErrorproc;
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mng_processarow fProcessarow;
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#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
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#ifndef MNG_NO_OLD_VERSIONS
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mng_bool bPreDraft48; /* flags ancient style draft */
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mng_chunkid iChunkname; /* read/write-state variables */
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mng_uint32 iChunkseq;
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mng_uint32 iSuspendbufleft;
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mng_uint32 iChunklen; /* chunk length */
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mng_uint8p pReadbufnext; /* 32K+ suspension-processing */
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mng_uint8p pLargebufnext;
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mng_pushdatap pFirstpushchunk; /* variables for push mechanisms */
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mng_pushdatap pLastpushchunk;
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mng_pushdatap pFirstpushdata;
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mng_pushdatap pLastpushdata;
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#endif /* MNG_SUPPORT_READ */
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#ifdef MNG_SUPPORT_WRITE
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mng_bool bCreating; /* create/write processing variables */
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mng_bool bWriting;
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mng_chunkid iFirstchunkadded;
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mng_chunkid iFirstchunkadded;
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mng_uint32 iWritebufsize;
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mng_uint8p pWritebuf;
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mng_uint32 iLayerseq;
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mng_uint32 iFrametime; /* millisecs */
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mng_uint32 iTotalframes; /* end-totals after mng_read() */
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mng_uint32 iTotallayers;
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mng_uint32 iTotalplaytime; /* millisecs */
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mng_bool bSkipping; /* LOOP iteration=0 */
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#ifdef MNG_SUPPORT_DYNAMICMNG
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mng_bool bDynamic; /* MNG is dynamic (eg. has events) */
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mng_bool bRunningevent; /* currently processing an event */
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mng_bool bStopafterseek; /* stop after next SEEK */
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mng_int32 iEventx; /* X/Y of current event */
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mng_objectp pLastmousemove; /* last event triggered */
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mng_uint32 iRequestframe; /* go_xxxx variables */
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mng_uint32 iRequestlayer;
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mng_uint32 iRequesttime;
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mng_bool bFreezing; /* indicates app requested a freeze */
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mng_bool bResetting; /* indicates app requested a reset */
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mng_bool bNeedrefresh; /* indicates screen-refresh is needed */
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mng_bool bMisplacedTERM; /* indicates TERM is out of place */
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mng_bool bOnlyfirstframe; /* show first frame after TERM and stop */
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mng_uint32 iFramesafterTERM; /* determines frame-count after TERM */
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mng_objectp pCurrentobj; /* current "object" */
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mng_objectp pCurraniobj; /* current animation object
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"to be"/"being" processed */
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mng_objectp pLastimgobj; /* image-object structures */
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mng_objectp pFirstaniobj; /* double-linked list of */
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mng_objectp pLastaniobj; /* animation-object structures */
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#ifdef MNG_SUPPORT_DYNAMICMNG
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mng_objectp pFirstevent; /* double-linked list of */
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mng_objectp pLastevent; /* event-object structures */
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#if defined(MNG_GAMMA_ONLY) || defined(MNG_FULL_CMS)
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#if defined(MNG_GAMMA_ONLY) || defined(MNG_FULL_CMS) || defined(MNG_APP_CMS)
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mng_uint8 aGammatab[256]; /* precomputed gamma lookup table */
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mng_float dLastgamma; /* last gamma used to compute table */
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delta-row to the bitdepth of its target */
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mng_fptr fDeltarow; /* internal callback to execute a
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delta-row onto a target */
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#ifndef MNG_SKIPCHUNK_PAST
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mng_fptr fFliprow; /* internal callback to flip a row of pixels
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left<->right for a PAST operation */
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mng_fptr fTilerow; /* internal callback to tile a row of pixels
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during a PAST operation */
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mng_fptr fInitrowproc; /* internal callback to initialize
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the row processing */
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mng_uint16 iBACKimageid;
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mng_uint8 iBACKtile;
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mng_int32 iBackimgoffsx; /* temp variables for restore_bkgd */
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mng_int32 iBackimgoffsy;
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mng_uint32 iBackimgwidth;
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mng_uint32 iBackimgheight;
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#ifndef MNG_SKIPCHUNK_FRAM
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mng_uint8 iFRAMmode; /* FRAM fields (global) */
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mng_uint32 iFRAMdelay;
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mng_uint32 iFRAMtimeout;
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mng_int32 iFrameclipt;
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mng_int32 iFrameclipb;
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mng_uint32 iNextdelay; /* delay for *after* next image */
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mng_uint32 iNextdelay; /* delay *after* next image */
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mng_uint8 iSHOWmode; /* SAVE fields */
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#ifndef MNG_SKIPCHUNK_SHOW
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mng_uint8 iSHOWmode; /* SHOW fields */
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mng_uint16 iSHOWfromid;
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mng_uint16 iSHOWtoid;
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mng_uint16 iSHOWnextid;
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mng_int16 iSHOWskip;
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mng_uint32 iGlobalPLTEcount; /* global PLTE fields */
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mng_rgbpaltab aGlobalPLTEentries;
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mng_uint32 iGlobalGamma; /* global gAMA fields */
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#ifndef MNG_SKIPCHUNK_cHRM
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mng_uint32 iGlobalWhitepointx; /* global cHRM fields */
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mng_uint32 iGlobalWhitepointy;
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mng_uint32 iGlobalPrimaryredx;
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mng_uint32 iGlobalPrimarygreeny;
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mng_uint32 iGlobalPrimarybluex;
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mng_uint32 iGlobalPrimarybluey;
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mng_uint8 iGlobalRendintent; /* global sRGB fields */
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#ifndef MNG_SKIPCHUNK_iCCP
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mng_uint32 iGlobalProfilesize; /* global iCCP fields */
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mng_ptr pGlobalProfile;
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mng_uint16 iGlobalBKGDred; /* global bKGD fields */
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mng_uint16 iGlobalBKGDgreen;
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mng_ptr pDeltaImage; /* delta-image fields */
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mng_uint8 iDeltaImagetype;
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mng_uint8 iDeltatype;
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#endif /* MNG_SUPPORT_DISPLAY */
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mng_uint8 iDeltatype; /* need this one in read processing !! */
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#ifdef MNG_SUPPORT_DISPLAY
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mng_uint32 iDeltaBlockwidth;
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mng_uint32 iDeltaBlockheight;
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mng_uint32 iDeltaBlockx;
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mng_fptr fDeltareplacerow;
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mng_fptr fDeltaputrow;
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#ifndef MNG_SKIPCHUNK_PROM
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mng_fptr fPromoterow; /* internal PROM fields */
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mng_fptr fPromBitdepth;
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mng_uint8 iPromColortype;
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mng_uint8 iPromBitdepth;
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mng_uint8 iPromFilltype;
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mng_uint32 iPromWidth;
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#ifndef MNG_SKIPCHUNK_MAGN
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mng_uint16 iMAGNfromid;
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mng_uint16 iMAGNcurrentid;
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mng_uint16 iMAGNtoid;
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#ifndef MNG_SKIPCHUNK_PAST
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mng_int32 iPastx; /* target x/y of last PAST */
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mng_objectp pLastseek; /* last processed ani_seek object */
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#endif /* MNG_SUPPORT_DISPLAY */
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#ifdef MNG_INCLUDE_ZLIB
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mng_bool bJPEGhasheader; /* indicates "readheader" succeeded (JDAT) */
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mng_bool bJPEGdecostarted; /* indicates "decompress" started (JDAT) */
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mng_bool bJPEGscanstarted; /* indicates "first scan" started (JDAT) */
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mng_bool bJPEGscanending; /* indicates "finish_output" suspended (JDAT) */
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mng_bool bJPEGprogressive; /* indicates a progressive image (JDAT) */
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mng_bool bJPEGdecompress2; /* indicates "decompress" initialized (JDAA) */
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#endif /* MNG_INCLUDE_JNG */
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mng_uint32 aCRCtable [256]; /* CRC prefab table */
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mng_bool bCRCcomputed; /* "has been build" indicator */
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#ifndef MNG_USE_ZLIB_CRC
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mng_uint32 aCRCtable [256]; /* CRC prefab table */
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mng_bool bCRCcomputed; /* "has been built" indicator */
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#ifdef MNG_OPTIMIZE_FOOTPRINT_INIT
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png_imgtype ePng_imgtype;
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#if defined(MNG_NO_16BIT_SUPPORT)
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mng_uint8 iPNGdepth; /* Real input depth */
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typedef mng_retcode(*mng_differrow) (mng_datap pData);
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typedef mng_retcode(*mng_scalerow) (mng_datap pData);
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typedef mng_retcode(*mng_deltarow) (mng_datap pData);
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typedef mng_retcode(*mng_promoterow) (mng_datap pData);
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typedef mng_retcode(*mng_fliprow) (mng_datap pData);
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typedef mng_retcode(*mng_tilerow) (mng_datap pData);
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typedef mng_uint8 (*mng_bitdepth_8) (mng_uint8 iB);
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typedef mng_uint16 (*mng_bitdepth_16) (mng_uint8 iB);
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typedef mng_retcode(*mng_magnify_x) (mng_datap pData,
added
removed
libmng_data.h
