libmng_chunks.h

Linux下的基于X11的图形开发环境。

/* ************************************************************************** */
/* *             For conditions of distribution and use,                    * */
/* *                see copyright notice in libmng.h                        * */
/* ************************************************************************** */
/* *                                                                        * */
/* * project   : libmng                                                     * */
/* * file      : libmng_chunks.h           copyright (c) 2000 G.Juyn        * */
/* * version   : 1.0.0                                                      * */
/* *                                                                        * */
/* * purpose   : Chunk structures (definition)                              * */
/* *                                                                        * */
/* * author    : G.Juyn                                                     * */
/* * web       : http://www.3-t.com                                         * */
/* * email     : mailto:[e-mail]                                        * */
/* *                                                                        * */
/* * comment   : Definition of known chunk structures                       * */
/* *                                                                        * */
/* * changes   : 0.5.1 - 05/04/2000 - G.Juyn                                * */
/* *             - put in some extra comments                               * */
/* *             0.5.1 - 05/06/2000 - G.Juyn                                * */
/* *             - fixed layout for sBIT, PPLT                              * */
/* *             0.5.1 - 05/08/2000 - G.Juyn                                * */
/* *             - changed write callback definition                        * */
/* *             - changed strict-ANSI stuff                                * */
/* *             0.5.1 - 05/11/2000 - G.Juyn                                * */
/* *             - fixed layout for PPLT again (missed deltatype ?!?)       * */
/* *                                                                        * */
/* *             0.5.2 - 05/31/2000 - G.Juyn                                * */
/* *             - removed useless definition (contributed by Tim Rowley)   * */
/* *             0.5.2 - 06/03/2000 - G.Juyn                                * */
/* *             - fixed makeup for Linux gcc compile                       * */
/* *                                                                        * */
/* *             0.9.2 - 08/05/2000 - G.Juyn                                * */
/* *             - changed file-prefixes                                    * */
/* *                                                                        * */
/* *             0.9.3 - 08/26/2000 - G.Juyn                                * */
/* *             - added MAGN chunk                                         * */
/* *             0.9.3 - 09/10/2000 - G.Juyn                                * */
/* *             - fixed DEFI behavior                                      * */
/* *             0.9.3 - 10/16/2000 - G.Juyn                                * */
/* *             - added JDAA chunk                                         * */
/* *                                                                        * */
/* ************************************************************************** */

#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
#pragma option -A                      /* force ANSI-C */
#endif

#ifndef _libmng_chunks_h_
#define _libmng_chunks_h_

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

#ifdef MNG_SWAP_ENDIAN
#define PNG_SIG 0x474e5089L
#define JNG_SIG 0x474e4a8bL
#define MNG_SIG 0x474e4d8aL
#define POST_SIG 0x0a1a0a0dL
#else
#define PNG_SIG 0x89504e47L
#define JNG_SIG 0x8b4a4e47L
#define MNG_SIG 0x8a4d4e47L
#define POST_SIG 0x0d0a1a0aL
#endif

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

typedef mng_retcode (*mng_createchunk)  (mng_datap   pData,
                                         mng_chunkp  pHeader,
                                         mng_chunkp* ppChunk);

typedef mng_retcode (*mng_cleanupchunk) (mng_datap   pData,
                                         mng_chunkp  pHeader);

typedef mng_retcode (*mng_readchunk)    (mng_datap   pData,
                                         mng_chunkp  pHeader,
                                         mng_uint32  iRawlen,
                                         mng_uint8p  pRawdata,
                                         mng_chunkp* pChunk);

typedef mng_retcode (*mng_writechunk)   (mng_datap   pData,
                                         mng_chunkp  pChunk);

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

typedef struct {                       /* generic header */
           mng_chunkid       iChunkname;
           mng_createchunk   fCreate;
           mng_cleanupchunk  fCleanup;
           mng_readchunk     fRead;
           mng_writechunk    fWrite;
           mng_chunkp        pNext;    /* for double-linked list */
           mng_chunkp        pPrev;
        } mng_chunk_header;
typedef mng_chunk_header * mng_chunk_headerp;

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

typedef struct {                       /* IHDR */
           mng_chunk_header  sHeader;
           mng_uint32        iWidth;
           mng_uint32        iHeight;
           mng_uint8         iBitdepth;
           mng_uint8         iColortype;
           mng_uint8         iCompression;
           mng_uint8         iFilter;
           mng_uint8         iInterlace;
        } mng_ihdr;
typedef mng_ihdr * mng_ihdrp;

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

typedef struct {                       /* PLTE */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iEntrycount;
           mng_rgbpaltab     aEntries;
        } mng_plte;
typedef mng_plte * mng_pltep;

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

typedef struct {                       /* IDAT */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iDatasize;
           mng_ptr           pData;
        } mng_idat;
typedef mng_idat * mng_idatp;

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

typedef struct {                       /* IEND */
           mng_chunk_header  sHeader;
        } mng_iend;
typedef mng_iend * mng_iendp;

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

typedef struct {                       /* tRNS */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_bool          bGlobal;
           mng_uint8         iType;    /* colortype (0,2,3) */
           mng_uint32        iCount;
           mng_uint8arr      aEntries;
           mng_uint16        iGray;
           mng_uint16        iRed;
           mng_uint16        iGreen;
           mng_uint16        iBlue;
           mng_uint32        iRawlen;
           mng_uint8arr      aRawdata;
        } mng_trns;
typedef mng_trns * mng_trnsp;

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

typedef struct {                       /* gAMA */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iGamma;
        } mng_gama;
typedef mng_gama * mng_gamap;

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

typedef struct {                       /* cHRM */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iWhitepointx;
           mng_uint32        iWhitepointy;
           mng_uint32        iRedx;
           mng_uint32        iRedy;
           mng_uint32        iGreenx;
           mng_uint32        iGreeny;
           mng_uint32        iBluex;
           mng_uint32        iBluey;
        } mng_chrm;
typedef mng_chrm * mng_chrmp;

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

typedef struct {                       /* sRGB */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint8         iRenderingintent;
        } mng_srgb;
typedef mng_srgb * mng_srgbp;

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

typedef struct {                       /* iCCP */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iNamesize;
           mng_pchar         zName;
           mng_uint8         iCompression;
           mng_uint32        iProfilesize;
           mng_ptr           pProfile;
        } mng_iccp;
typedef mng_iccp * mng_iccpp;

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

typedef struct {                       /* tEXt */
           mng_chunk_header  sHeader;
           mng_uint32        iKeywordsize;
           mng_pchar         zKeyword;
           mng_uint32        iTextsize;
           mng_pchar         zText;
        } mng_text;
typedef mng_text * mng_textp;

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

typedef struct {                       /* zTXt */
           mng_chunk_header  sHeader;
           mng_uint32        iKeywordsize;
           mng_pchar         zKeyword;
           mng_uint8         iCompression;
           mng_uint32        iTextsize;
           mng_pchar         zText;
        } mng_ztxt;
typedef mng_ztxt * mng_ztxtp;

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

typedef struct {                       /* iTXt */
           mng_chunk_header  sHeader;
           mng_uint32        iKeywordsize;
           mng_pchar         zKeyword;
           mng_uint8         iCompressionflag;
           mng_uint8         iCompressionmethod;
           mng_uint32        iLanguagesize;
           mng_pchar         zLanguage;
           mng_uint32        iTranslationsize;
           mng_pchar         zTranslation;
           mng_uint32        iTextsize;
           mng_pchar         zText;
        } mng_itxt;
typedef mng_itxt * mng_itxtp;

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

typedef struct {                       /* bKGD */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint8         iType;    /* 3=indexed, 0=gray, 2=rgb */
           mng_uint8         iIndex;
           mng_uint16        iGray;
           mng_uint16        iRed;
           mng_uint16        iGreen;
           mng_uint16        iBlue;
        } mng_bkgd;
typedef mng_bkgd * mng_bkgdp;

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

typedef struct {                       /* pHYs */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iSizex;
           mng_uint32        iSizey;
           mng_uint8         iUnit;
        } mng_phys;
typedef mng_phys * mng_physp;

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

typedef struct {                       /* sBIT */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint8         iType;    /* colortype (0,2,3,4,6,10,12,14,16) */
           mng_uint8arr4     aBits;
        } mng_sbit;
typedef mng_sbit * mng_sbitp;

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

typedef struct {                       /* sPLT */
           mng_chunk_header  sHeader;
           mng_bool          bEmpty;
           mng_uint32        iNamesize;
           mng_pchar         zName;
           mng_uint8         iSampledepth;
           mng_uint32        iEntrycount;
           mng_ptr           pEntries;
        } mng_splt;
typedef mng_splt * mng_spltp;

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

typedef struct {                       /* hIST */
           mng_chunk_header  sHeader;
           mng_uint32        iEntrycount;
           mng_uint16arr     aEntries;
        } mng_hist;
typedef mng_hist * mng_histp;

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

typedef struct {                       /* tIME */
           mng_chunk_header  sHeader;
           mng_uint16        iYear;
           mng_uint8         iMonth;
           mng_uint8         iDay;
           mng_uint8         iHour;
           mng_uint8         iMinute;
           mng_uint8         iSecond;
        } mng_time;
typedef mng_time * mng_timep;

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

typedef struct {                       /* MHDR */
           mng_chunk_header  sHeader;
           mng_uint32        iWidth;
           mng_uint32        iHeight;
           mng_uint32        iTicks;
           mng_uint32        iLayercount;
           mng_uint32        iFramecount;
           mng_uint32        iPlaytime;
           mng_uint32        iSimplicity;
        } mng_mhdr;
typedef mng_mhdr * mng_mhdrp;

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

typedef struct {                       /* MEND */
           mng_chunk_header  sHeader;
        } mng_mend;
typedef mng_mend * mng_mendp;

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

typedef struct {                       /* LOOP */
           mng_chunk_header  sHeader;
           mng_uint8         iLevel;
           mng_uint32        iRepeat;
           mng_uint8         iTermination;
           mng_uint32        iItermin;
           mng_uint32        iItermax;
           mng_uint32        iCount;
           mng_uint32p       pSignals;
        } mng_loop;
typedef mng_loop * mng_loopp;

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

typedef struct {                       /* ENDL */
           mng_chunk_header  sHeader;
           mng_uint8         iLevel;
        } mng_endl;
typedef mng_endl * mng_endlp;

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

typedef struct {                       /* DEFI */
           mng_chunk_header  sHeader;
           mng_uint16        iObjectid;
           mng_bool          bHasdonotshow;
           mng_uint8         iDonotshow;
           mng_bool          bHasconcrete;
           mng_uint8         iConcrete;
           mng_bool          bHasloca;
           mng_int32         iXlocation;
           mng_int32         iYlocation;
           mng_bool          bHasclip;
           mng_int32         iLeftcb;
           mng_int32         iRightcb;
           mng_int32         iTopcb;
           mng_int32         iBottomcb;
        } mng_defi;
typedef mng_defi * mng_defip;

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

typedef struct {                       /* BASI */
           mng_chunk_header  sHeader;
           mng_uint32        iWidth;