src/tiff/tiffiop.h

/* $Header$ */

/*
 * Copyright (c) 1988-1997 Sam Leffler
 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#ifndef _TIFFIOP_
#define	_TIFFIOP_
/*
 * ``Library-private'' definitions.
 */
/*
 * UNIX systems should run the configure script to generate
 * a port.h file that reflects the system capabilities.
 * Doing this obviates all the dreck done in tiffcomp.h.
 */
#if (defined(unix) || defined(__unix)) && !defined(__DJGPP__)
#include "port.h"
#include "tiffconf.h"
#else
#include "tiffconf.h"
#include "tiffcomp.h"
#endif
#include "tiffio.h"
#include "tif_dir.h"

#ifndef TRUE
#define	TRUE	1
#define	FALSE	0
#endif

/*
 * Typedefs for ``method pointers'' used internally.
 */
typedef	unsigned char tidataval_t;	/* internal image data value type */
typedef	tidataval_t* tidata_t;		/* reference to internal image data */

typedef	void (*TIFFVoidMethod)(TIFF*);
typedef	int (*TIFFBoolMethod)(TIFF*);
typedef	int (*TIFFPreMethod)(TIFF*, tsample_t);
typedef	int (LINKAGEMODE *TIFFCodeMethod)(TIFF*, tidata_t, tsize_t, tsample_t);
typedef	int (LINKAGEMODE *TIFFSeekMethod)(TIFF*, uint32);
typedef	void (LINKAGEMODE *TIFFPostMethod)(TIFF*, tidata_t, tsize_t);
typedef	int (*TIFFVSetMethod)(TIFF*, ttag_t, va_list);
typedef	int (*TIFFVGetMethod)(TIFF*, ttag_t, va_list);
typedef	void (LINKAGEMODE *TIFFPrintMethod)(TIFF*, FILE*, long);
typedef	uint32 (LINKAGEMODE *TIFFStripMethod)(TIFF*, uint32);
typedef	void (LINKAGEMODE *TIFFTileMethod)(TIFF*, uint32*, uint32*);

struct tiff {
	char*		tif_name;	/* name of open file */
	int		tif_fd;		/* open file descriptor */
	int		tif_mode;	/* open mode (O_*) */
	uint32		tif_flags;
#define	TIFF_FILLORDER		0x0003	/* natural bit fill order for machine */
#define	TIFF_DIRTYHEADER	0x0004	/* header must be written on close */
#define	TIFF_DIRTYDIRECT	0x0008	/* current directory must be written */
#define	TIFF_BUFFERSETUP	0x0010	/* data buffers setup */
#define	TIFF_CODERSETUP		0x0020	/* encoder/decoder setup done */
#define	TIFF_BEENWRITING	0x0040	/* written 1+ scanlines to file */
#define	TIFF_SWAB		0x0080	/* byte swap file information */
#define	TIFF_NOBITREV		0x0100	/* inhibit bit reversal logic */
#define	TIFF_MYBUFFER		0x0200	/* my raw data buffer; free on close */
#define	TIFF_ISTILED		0x0400	/* file is tile, not strip- based */
#define	TIFF_MAPPED		0x0800	/* file is mapped into memory */
#define	TIFF_POSTENCODE		0x1000	/* need call to postencode routine */
#define	TIFF_INSUBIFD		0x2000	/* currently writing a subifd */
#define	TIFF_UPSAMPLED		0x4000	/* library is doing data up-sampling */
#define	TIFF_STRIPCHOP		0x8000	/* enable strip chopping support */
	toff_t		tif_diroff;	/* file offset of current directory */
	toff_t		tif_nextdiroff;	/* file offset of following directory */
	TIFFDirectory	tif_dir;	/* internal rep of current directory */
	TIFFHeader	tif_header;	/* file's header block */
        tidata_t        tif_clientdir;  /* client TIFF directory */
	const int*	tif_typeshift;	/* data type shift counts */
	const long*	tif_typemask;	/* data type masks */
	uint32		tif_row;	/* current scanline */
	tdir_t		tif_curdir;	/* current directory (index) */
	tstrip_t	tif_curstrip;	/* current strip for read/write */
	toff_t		tif_curoff;	/* current offset for read/write */
	toff_t		tif_dataoff;	/* current offset for writing dir */
#if SUBIFD_SUPPORT
	uint16		tif_nsubifd;	/* remaining subifds to write */
	toff_t		tif_subifdoff;	/* offset for patching SubIFD link */
#endif
/* tiling support */
	uint32 		tif_col;	/* current column (offset by row too) */
	ttile_t		tif_curtile;	/* current tile for read/write */
	tsize_t		tif_tilesize;	/* # of bytes in a tile */
/* compression scheme hooks */
	TIFFBoolMethod	tif_setupdecode;/* called once before predecode */
	TIFFPreMethod	tif_predecode;	/* pre- row/strip/tile decoding */
	TIFFBoolMethod	tif_setupencode;/* called once before preencode */
	TIFFPreMethod	tif_preencode;	/* pre- row/strip/tile encoding */
	TIFFBoolMethod	tif_postencode;	/* post- row/strip/tile encoding */
	TIFFCodeMethod	tif_decoderow;	/* scanline decoding routine */
	TIFFCodeMethod	tif_encoderow;	/* scanline encoding routine */
	TIFFCodeMethod	tif_decodestrip;/* strip decoding routine */
	TIFFCodeMethod	tif_encodestrip;/* strip encoding routine */
	TIFFCodeMethod	tif_decodetile;	/* tile decoding routine */
	TIFFCodeMethod	tif_encodetile;	/* tile encoding routine */
	TIFFVoidMethod	tif_close;	/* cleanup-on-close routine */
	TIFFSeekMethod	tif_seek;	/* position within a strip routine */
	TIFFVoidMethod	tif_cleanup;	/* cleanup state routine */
	TIFFStripMethod	tif_defstripsize;/* calculate/constrain strip size */
	TIFFTileMethod	tif_deftilesize;/* calculate/constrain tile size */
	tidata_t	tif_data;	/* compression scheme private data */
/* input/output buffering */
	tsize_t		tif_scanlinesize;/* # of bytes in a scanline */
	tsize_t		tif_scanlineskew;/* scanline skew for reading strips */
	tidata_t	tif_rawdata;	/* raw data buffer */
	tsize_t		tif_rawdatasize;/* # of bytes in raw data buffer */
	tidata_t	tif_rawcp;	/* current spot in raw buffer */
	tsize_t		tif_rawcc;	/* bytes unread from raw buffer */
/* memory-mapped file support */
	tidata_t	tif_base;	/* base of mapped file */
	toff_t		tif_size;	/* size of mapped file region (bytes) */
	TIFFMapFileProc	tif_mapproc;	/* map file method */
	TIFFUnmapFileProc tif_unmapproc;/* unmap file method */
/* input/output callback methods */
	thandle_t	tif_clientdata;	/* callback parameter */
	TIFFReadWriteProc tif_readproc;	/* read method */
	TIFFReadWriteProc tif_writeproc;/* write method */
	TIFFSeekProc	tif_seekproc;	/* lseek method */
	TIFFCloseProc	tif_closeproc;	/* close method */
	TIFFSizeProc	tif_sizeproc;	/* filesize method */
/* post-decoding support */
	TIFFPostMethod	tif_postdecode;	/* post decoding routine */
/* tag support */
	TIFFFieldInfo**	tif_fieldinfo;	/* sorted table of registered tags */
	int		tif_nfields;	/* # entries in registered tag table */
	TIFFVSetMethod	tif_vsetfield;	/* tag set routine */
	TIFFVGetMethod	tif_vgetfield;	/* tag get routine */
	TIFFPrintMethod	tif_printdir;	/* directory print routine */
};

#define	isPseudoTag(t)	(t > 0xffff)	/* is tag value normal or pseudo */

#define	isTiled(tif)	(((tif)->tif_flags & TIFF_ISTILED) != 0)
#define	isMapped(tif)	(((tif)->tif_flags & TIFF_MAPPED) != 0)
#define	isFillOrder(tif, o)	(((tif)->tif_flags & (o)) != 0)
#define	isUpSampled(tif)	(((tif)->tif_flags & TIFF_UPSAMPLED) != 0)
#define	TIFFReadFile(tif, buf, size) \
	((*(tif)->tif_readproc)((tif)->tif_clientdata,buf,size))
#define	TIFFWriteFile(tif, buf, size) \
	((*(tif)->tif_writeproc)((tif)->tif_clientdata,buf,size))
#define	TIFFSeekFile(tif, off, whence) \
	((*(tif)->tif_seekproc)((tif)->tif_clientdata,(toff_t)(off),whence))
#define	TIFFCloseFile(tif) \
	((*(tif)->tif_closeproc)((tif)->tif_clientdata))
#define	TIFFGetFileSize(tif) \
	((*(tif)->tif_sizeproc)((tif)->tif_clientdata))
#define	TIFFMapFileContents(tif, paddr, psize) \
	((*(tif)->tif_mapproc)((tif)->tif_clientdata,paddr,psize))
#define	TIFFUnmapFileContents(tif, addr, size) \
	((*(tif)->tif_unmapproc)((tif)->tif_clientdata,addr,size))

/*
 * Default Read/Seek/Write definitions.
 */
#ifndef ReadOK
#define	ReadOK(tif, buf, size) \
	(TIFFReadFile(tif, (tdata_t) buf, (tsize_t) size) == (tsize_t) size)
#endif
#ifndef SeekOK
#define	SeekOK(tif, off) \
	(TIFFSeekFile(tif, (toff_t) off, SEEK_SET) == (toff_t) off)
#endif
#ifndef WriteOK
#define	WriteOK(tif, buf, size) \
	(TIFFWriteFile(tif, (tdata_t) buf, (tsize_t) size) == (tsize_t) size)
#endif

/* NB: the uint32 casts are to silence certain ANSI-C compilers */
#define	TIFFhowmany(x, y) ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y)))
#define	TIFFroundup(x, y) (TIFFhowmany(x,y)*((uint32)(y)))

#if defined(__cplusplus)
extern "C" {
#endif
extern	int _TIFFgetMode(const char*, const char*);
extern	int _TIFFNoRowEncode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoStripEncode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoTileEncode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoRowDecode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoStripDecode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoTileDecode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	void _TIFFNoPostDecode(TIFF*, tidata_t, tsize_t);
extern	int _TIFFNoSeek(TIFF*, uint32);
extern	void _TIFFSwab16BitData(TIFF*, tidata_t, tsize_t);
extern	void _TIFFSwab32BitData(TIFF*, tidata_t, tsize_t);
extern	void _TIFFSwab64BitData(TIFF*, tidata_t, tsize_t);
extern	int  TIFFFlushData1(TIFF*);
extern	void  TIFFFreeDirectory(TIFF*);
extern	int  TIFFDefaultDirectory(TIFF*);
extern	int  TIFFSetCompressionScheme(TIFF*, uint16);
extern	int  TIFFSetDefaultCompressionState(TIFF*);
extern	uint32 _TIFFDefaultStripSize(TIFF*, uint32);
extern	void _TIFFDefaultTileSize(TIFF*, uint32*, uint32*);

extern	void _TIFFsetByteArray(void**, void*, long);
extern	void _TIFFsetString(char**, char*);
extern	void _TIFFsetShortArray(uint16**, uint16*, long);
extern	void _TIFFsetLongArray(uint32**, uint32*, long);
extern	void _TIFFsetFloatArray(float**, float*, long);
extern	void _TIFFsetDoubleArray(double**, double*, long);

extern	void _TIFFprintAscii(FILE*, const char*);
extern	void _TIFFprintAsciiTag(FILE*, const char*, const char*);

GLOBALDATA(TIFFErrorHandler,_TIFFwarningHandler);
GLOBALDATA(TIFFErrorHandler,_TIFFerrorHandler);

extern int TIFFInitDumpMode(TIFF*, int);
#ifdef PACKBITS_SUPPORT
extern	int TIFFInitPackBits(TIFF*, int);
#endif
#ifdef CCITT_SUPPORT
extern	int TIFFInitCCITTRLE(TIFF*, int), TIFFInitCCITTRLEW(TIFF*, int);
extern	int TIFFInitCCITTFax3(TIFF*, int), TIFFInitCCITTFax4(TIFF*, int);
#endif
#ifdef THUNDER_SUPPORT
extern	int TIFFInitThunderScan(TIFF*, int);
#endif
#ifdef NEXT_SUPPORT
extern	int TIFFInitNeXT(TIFF*, int);
#endif
#ifdef LZW_SUPPORT
extern	int TIFFInitLZW(TIFF*, int);
#endif
#ifdef OJPEG_SUPPORT
extern	int TIFFInitOJPEG(TIFF*, int);
#endif
#ifdef JPEG_SUPPORT
extern	int TIFFInitJPEG(TIFF*, int);
#endif
#ifdef JBIG_SUPPORT
extern	int TIFFInitJBIG(TIFF*, int);
#endif
#ifdef ZIP_SUPPORT
extern	int TIFFInitZIP(TIFF*, int);
#endif
#ifdef PIXARLOG_SUPPORT
extern	int TIFFInitPixarLog(TIFF*, int);
#endif
#ifdef LOGLUV_SUPPORT
extern	int TIFFInitSGILog(TIFF*, int);
#endif
#ifdef VMS
extern	const TIFFCodec _TIFFBuiltinCODECS[];
#else
extern	TIFFCodec _TIFFBuiltinCODECS[];
#endif

#if defined(__cplusplus)
}
#endif
#endif /* _TIFFIOP_ */
Commit	Line	Data
	1	/* $Header$ */
	2
	3	/*
	4	* Copyright (c) 1988-1997 Sam Leffler
	5	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	6	*
	7	* Permission to use, copy, modify, distribute, and sell this software and
	8	* its documentation for any purpose is hereby granted without fee, provided
	9	* that (i) the above copyright notices and this permission notice appear in
	10	* all copies of the software and related documentation, and (ii) the names of
	11	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	12	* publicity relating to the software without the specific, prior written
	13	* permission of Sam Leffler and Silicon Graphics.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	17	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	20	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	21	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	22	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	23	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*/
	26
	27	#ifndef _TIFFIOP_
	28	#define _TIFFIOP_
	29	/*
	30	* ``Library-private'' definitions.
	31	*/
	32	/*
	33	* UNIX systems should run the configure script to generate
	34	* a port.h file that reflects the system capabilities.
	35	* Doing this obviates all the dreck done in tiffcomp.h.
	36	*/
	37	#if (defined(unix) \|\| defined(__unix)) && !defined(__DJGPP__)
	38	#include "port.h"
	39	#include "tiffconf.h"
	40	#else
	41	#include "tiffconf.h"
	42	#include "tiffcomp.h"
	43	#endif
	44	#include "tiffio.h"
	45	#include "tif_dir.h"
	46
	47	#ifndef TRUE
	48	#define TRUE 1
	49	#define FALSE 0
	50	#endif
	51
	52	/*
	53	* Typedefs for ``method pointers'' used internally.
	54	*/
	55	typedef unsigned char tidataval_t; /* internal image data value type */
	56	typedef tidataval_t* tidata_t; /* reference to internal image data */
	57
	58	typedef void (TIFFVoidMethod)(TIFF);
	59	typedef int (TIFFBoolMethod)(TIFF);
	60	typedef int (TIFFPreMethod)(TIFF, tsample_t);
	61	typedef int (LINKAGEMODE TIFFCodeMethod)(TIFF, tidata_t, tsize_t, tsample_t);
	62	typedef int (LINKAGEMODE TIFFSeekMethod)(TIFF, uint32);
	63	typedef void (LINKAGEMODE TIFFPostMethod)(TIFF, tidata_t, tsize_t);
	64	typedef int (TIFFVSetMethod)(TIFF, ttag_t, va_list);
	65	typedef int (TIFFVGetMethod)(TIFF, ttag_t, va_list);
	66	typedef void (LINKAGEMODE TIFFPrintMethod)(TIFF, FILE*, long);
	67	typedef uint32 (LINKAGEMODE TIFFStripMethod)(TIFF, uint32);
	68	typedef void (LINKAGEMODE TIFFTileMethod)(TIFF, uint32, uint32);
	69
	70	struct tiff {
	71	char* tif_name; /* name of open file */
	72	int tif_fd; /* open file descriptor */
	73	int tif_mode; /* open mode (O_) /
	74	uint32 tif_flags;
	75	#define TIFF_FILLORDER 0x0003 /* natural bit fill order for machine */
	76	#define TIFF_DIRTYHEADER 0x0004 /* header must be written on close */
	77	#define TIFF_DIRTYDIRECT 0x0008 /* current directory must be written */
	78	#define TIFF_BUFFERSETUP 0x0010 /* data buffers setup */
	79	#define TIFF_CODERSETUP 0x0020 /* encoder/decoder setup done */
	80	#define TIFF_BEENWRITING 0x0040 /* written 1+ scanlines to file */
	81	#define TIFF_SWAB 0x0080 /* byte swap file information */
	82	#define TIFF_NOBITREV 0x0100 /* inhibit bit reversal logic */
	83	#define TIFF_MYBUFFER 0x0200 /* my raw data buffer; free on close */
	84	#define TIFF_ISTILED 0x0400 /* file is tile, not strip- based */
	85	#define TIFF_MAPPED 0x0800 /* file is mapped into memory */
	86	#define TIFF_POSTENCODE 0x1000 /* need call to postencode routine */
	87	#define TIFF_INSUBIFD 0x2000 /* currently writing a subifd */
	88	#define TIFF_UPSAMPLED 0x4000 /* library is doing data up-sampling */
	89	#define TIFF_STRIPCHOP 0x8000 /* enable strip chopping support */
	90	toff_t tif_diroff; /* file offset of current directory */
	91	toff_t tif_nextdiroff; /* file offset of following directory */
	92	TIFFDirectory tif_dir; /* internal rep of current directory */
	93	TIFFHeader tif_header; /* file's header block */
	94	tidata_t tif_clientdir; /* client TIFF directory */
	95	const int* tif_typeshift; /* data type shift counts */
	96	const long* tif_typemask; /* data type masks */
	97	uint32 tif_row; /* current scanline */
	98	tdir_t tif_curdir; /* current directory (index) */
	99	tstrip_t tif_curstrip; /* current strip for read/write */
	100	toff_t tif_curoff; /* current offset for read/write */
	101	toff_t tif_dataoff; /* current offset for writing dir */
	102	#if SUBIFD_SUPPORT
	103	uint16 tif_nsubifd; /* remaining subifds to write */
	104	toff_t tif_subifdoff; /* offset for patching SubIFD link */
	105	#endif
	106	/* tiling support */
	107	uint32 tif_col; /* current column (offset by row too) */
	108	ttile_t tif_curtile; /* current tile for read/write */
	109	tsize_t tif_tilesize; /* # of bytes in a tile */
	110	/* compression scheme hooks */
	111	TIFFBoolMethod tif_setupdecode;/* called once before predecode */
	112	TIFFPreMethod tif_predecode; /* pre- row/strip/tile decoding */
	113	TIFFBoolMethod tif_setupencode;/* called once before preencode */
	114	TIFFPreMethod tif_preencode; /* pre- row/strip/tile encoding */
	115	TIFFBoolMethod tif_postencode; /* post- row/strip/tile encoding */
	116	TIFFCodeMethod tif_decoderow; /* scanline decoding routine */
	117	TIFFCodeMethod tif_encoderow; /* scanline encoding routine */
	118	TIFFCodeMethod tif_decodestrip;/* strip decoding routine */
	119	TIFFCodeMethod tif_encodestrip;/* strip encoding routine */
	120	TIFFCodeMethod tif_decodetile; /* tile decoding routine */
	121	TIFFCodeMethod tif_encodetile; /* tile encoding routine */
	122	TIFFVoidMethod tif_close; /* cleanup-on-close routine */
	123	TIFFSeekMethod tif_seek; /* position within a strip routine */
	124	TIFFVoidMethod tif_cleanup; /* cleanup state routine */
	125	TIFFStripMethod tif_defstripsize;/* calculate/constrain strip size */
	126	TIFFTileMethod tif_deftilesize;/* calculate/constrain tile size */
	127	tidata_t tif_data; /* compression scheme private data */
	128	/* input/output buffering */
	129	tsize_t tif_scanlinesize;/* # of bytes in a scanline */
	130	tsize_t tif_scanlineskew;/* scanline skew for reading strips */
	131	tidata_t tif_rawdata; /* raw data buffer */
	132	tsize_t tif_rawdatasize;/* # of bytes in raw data buffer */
	133	tidata_t tif_rawcp; /* current spot in raw buffer */
	134	tsize_t tif_rawcc; /* bytes unread from raw buffer */
	135	/* memory-mapped file support */
	136	tidata_t tif_base; /* base of mapped file */
	137	toff_t tif_size; /* size of mapped file region (bytes) */
	138	TIFFMapFileProc tif_mapproc; /* map file method */
	139	TIFFUnmapFileProc tif_unmapproc;/* unmap file method */
	140	/* input/output callback methods */
	141	thandle_t tif_clientdata; /* callback parameter */
	142	TIFFReadWriteProc tif_readproc; /* read method */
	143	TIFFReadWriteProc tif_writeproc;/* write method */
	144	TIFFSeekProc tif_seekproc; /* lseek method */
	145	TIFFCloseProc tif_closeproc; /* close method */
	146	TIFFSizeProc tif_sizeproc; /* filesize method */
	147	/* post-decoding support */
	148	TIFFPostMethod tif_postdecode; /* post decoding routine */
	149	/* tag support */
	150	TIFFFieldInfo** tif_fieldinfo; /* sorted table of registered tags */
	151	int tif_nfields; /* # entries in registered tag table */
	152	TIFFVSetMethod tif_vsetfield; /* tag set routine */
	153	TIFFVGetMethod tif_vgetfield; /* tag get routine */
	154	TIFFPrintMethod tif_printdir; /* directory print routine */
	155	};
	156
	157	#define isPseudoTag(t) (t > 0xffff) /* is tag value normal or pseudo */
	158
	159	#define isTiled(tif) (((tif)->tif_flags & TIFF_ISTILED) != 0)
	160	#define isMapped(tif) (((tif)->tif_flags & TIFF_MAPPED) != 0)
	161	#define isFillOrder(tif, o) (((tif)->tif_flags & (o)) != 0)
	162	#define isUpSampled(tif) (((tif)->tif_flags & TIFF_UPSAMPLED) != 0)
	163	#define TIFFReadFile(tif, buf, size) \
	164	((*(tif)->tif_readproc)((tif)->tif_clientdata,buf,size))
	165	#define TIFFWriteFile(tif, buf, size) \
	166	((*(tif)->tif_writeproc)((tif)->tif_clientdata,buf,size))
	167	#define TIFFSeekFile(tif, off, whence) \
	168	((*(tif)->tif_seekproc)((tif)->tif_clientdata,(toff_t)(off),whence))
	169	#define TIFFCloseFile(tif) \
	170	((*(tif)->tif_closeproc)((tif)->tif_clientdata))
	171	#define TIFFGetFileSize(tif) \
	172	((*(tif)->tif_sizeproc)((tif)->tif_clientdata))
	173	#define TIFFMapFileContents(tif, paddr, psize) \
	174	((*(tif)->tif_mapproc)((tif)->tif_clientdata,paddr,psize))
	175	#define TIFFUnmapFileContents(tif, addr, size) \
	176	((*(tif)->tif_unmapproc)((tif)->tif_clientdata,addr,size))
	177
	178	/*
	179	* Default Read/Seek/Write definitions.
	180	*/
	181	#ifndef ReadOK
	182	#define ReadOK(tif, buf, size) \
	183	(TIFFReadFile(tif, (tdata_t) buf, (tsize_t) size) == (tsize_t) size)
	184	#endif
	185	#ifndef SeekOK
	186	#define SeekOK(tif, off) \
	187	(TIFFSeekFile(tif, (toff_t) off, SEEK_SET) == (toff_t) off)
	188	#endif
	189	#ifndef WriteOK
	190	#define WriteOK(tif, buf, size) \
	191	(TIFFWriteFile(tif, (tdata_t) buf, (tsize_t) size) == (tsize_t) size)
	192	#endif
	193
	194	/* NB: the uint32 casts are to silence certain ANSI-C compilers */
	195	#define TIFFhowmany(x, y) ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y)))
	196	#define TIFFroundup(x, y) (TIFFhowmany(x,y)*((uint32)(y)))
	197
	198	#if defined(__cplusplus)
	199	extern "C" {
	200	#endif
	201	extern int _TIFFgetMode(const char, const char);
	202	extern int _TIFFNoRowEncode(TIFF*, tidata_t, tsize_t, tsample_t);
	203	extern int _TIFFNoStripEncode(TIFF*, tidata_t, tsize_t, tsample_t);
	204	extern int _TIFFNoTileEncode(TIFF*, tidata_t, tsize_t, tsample_t);
	205	extern int _TIFFNoRowDecode(TIFF*, tidata_t, tsize_t, tsample_t);
	206	extern int _TIFFNoStripDecode(TIFF*, tidata_t, tsize_t, tsample_t);
	207	extern int _TIFFNoTileDecode(TIFF*, tidata_t, tsize_t, tsample_t);
	208	extern void _TIFFNoPostDecode(TIFF*, tidata_t, tsize_t);
	209	extern int _TIFFNoSeek(TIFF*, uint32);
	210	extern void _TIFFSwab16BitData(TIFF*, tidata_t, tsize_t);
	211	extern void _TIFFSwab32BitData(TIFF*, tidata_t, tsize_t);
	212	extern void _TIFFSwab64BitData(TIFF*, tidata_t, tsize_t);
	213	extern int TIFFFlushData1(TIFF*);
	214	extern void TIFFFreeDirectory(TIFF*);
	215	extern int TIFFDefaultDirectory(TIFF*);
	216	extern int TIFFSetCompressionScheme(TIFF*, uint16);
	217	extern int TIFFSetDefaultCompressionState(TIFF*);
	218	extern uint32 _TIFFDefaultStripSize(TIFF*, uint32);
	219	extern void _TIFFDefaultTileSize(TIFF, uint32, uint32*);
	220
	221	extern void _TIFFsetByteArray(void*, void, long);
	222	extern void _TIFFsetString(char*, char);
	223	extern void _TIFFsetShortArray(uint16*, uint16, long);
	224	extern void _TIFFsetLongArray(uint32*, uint32, long);
	225	extern void _TIFFsetFloatArray(float*, float, long);
	226	extern void _TIFFsetDoubleArray(double*, double, long);
	227
	228	extern void _TIFFprintAscii(FILE, const char);
	229	extern void _TIFFprintAsciiTag(FILE, const char, const char*);
	230
	231	GLOBALDATA(TIFFErrorHandler,_TIFFwarningHandler);
	232	GLOBALDATA(TIFFErrorHandler,_TIFFerrorHandler);
	233
	234	extern int TIFFInitDumpMode(TIFF*, int);
	235	#ifdef PACKBITS_SUPPORT
	236	extern int TIFFInitPackBits(TIFF*, int);
	237	#endif
	238	#ifdef CCITT_SUPPORT
	239	extern int TIFFInitCCITTRLE(TIFF, int), TIFFInitCCITTRLEW(TIFF, int);
	240	extern int TIFFInitCCITTFax3(TIFF, int), TIFFInitCCITTFax4(TIFF, int);
	241	#endif
	242	#ifdef THUNDER_SUPPORT
	243	extern int TIFFInitThunderScan(TIFF*, int);
	244	#endif
	245	#ifdef NEXT_SUPPORT
	246	extern int TIFFInitNeXT(TIFF*, int);
	247	#endif
	248	#ifdef LZW_SUPPORT
	249	extern int TIFFInitLZW(TIFF*, int);
	250	#endif
	251	#ifdef OJPEG_SUPPORT
	252	extern int TIFFInitOJPEG(TIFF*, int);
	253	#endif
	254	#ifdef JPEG_SUPPORT
	255	extern int TIFFInitJPEG(TIFF*, int);
	256	#endif
	257	#ifdef JBIG_SUPPORT
	258	extern int TIFFInitJBIG(TIFF*, int);
	259	#endif
	260	#ifdef ZIP_SUPPORT
	261	extern int TIFFInitZIP(TIFF*, int);
	262	#endif
	263	#ifdef PIXARLOG_SUPPORT
	264	extern int TIFFInitPixarLog(TIFF*, int);
	265	#endif
	266	#ifdef LOGLUV_SUPPORT
	267	extern int TIFFInitSGILog(TIFF*, int);
	268	#endif
	269	#ifdef VMS
	270	extern const TIFFCodec _TIFFBuiltinCODECS[];
	271	#else
	272	extern TIFFCodec _TIFFBuiltinCODECS[];
	273	#endif
	274
	275	#if defined(__cplusplus)
	276	}
	277	#endif
	278	#endif /* _TIFFIOP_ */