Source/LibTIFF/tiffiop.h - platform/external/free-image - Git at Google

 /* $Id: tiffiop.h,v 1.27 2009/09/06 13:11:29 drolon Exp $ */

 /*
  * 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.
  */

 #include "tif_config.h"

 #ifdef HAVE_FCNTL_H
 # include <fcntl.h>
 #endif

 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif

 #ifdef HAVE_STRING_H
 # include <string.h>
 #endif

 #ifdef HAVE_ASSERT_H
 # include <assert.h>
 #else
 # define assert(x)
 #endif

 #ifdef HAVE_SEARCH_H
 # include <search.h>
 #else
 extern void *lfind(const void *, const void *, size_t *, size_t,
 		   int (*)(const void *, const void *));
 #endif

 /*
   Libtiff itself does not require a 64-bit type, but bundled TIFF
   utilities may use it.
 */
 #define TIFF_INT64_T  signed long long
 #define TIFF_UINT64_T unsigned long long

 #include "tiffio.h"
 #include "tif_dir.h"

 #ifndef STRIP_SIZE_DEFAULT
 # define STRIP_SIZE_DEFAULT 8192
 #endif

 #define    streq(a,b)      (strcmp(a,b) == 0)

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

 typedef struct client_info {
     struct client_info *next;
     void      *data;
     char      *name;
 } TIFFClientInfoLink;

 /*
  * 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 (*TIFFCodeMethod)(TIFF*, tidata_t, tsize_t, tsample_t);
 typedef	int (*TIFFSeekMethod)(TIFF*, uint32);
 typedef	void (*TIFFPostMethod)(TIFF*, tidata_t, tsize_t);
 typedef	uint32 (*TIFFStripMethod)(TIFF*, uint32);
 typedef	void (*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		0x00003	/* natural bit fill order for machine */
 #define	TIFF_DIRTYHEADER	0x00004	/* header must be written on close */
 #define	TIFF_DIRTYDIRECT	0x00008	/* current directory must be written */
 #define	TIFF_BUFFERSETUP	0x00010	/* data buffers setup */
 #define	TIFF_CODERSETUP		0x00020	/* encoder/decoder setup done */
 #define	TIFF_BEENWRITING	0x00040	/* written 1+ scanlines to file */
 #define	TIFF_SWAB		0x00080	/* byte swap file information */
 #define	TIFF_NOBITREV		0x00100	/* inhibit bit reversal logic */
 #define	TIFF_MYBUFFER		0x00200	/* my raw data buffer; free on close */
 #define	TIFF_ISTILED		0x00400	/* file is tile, not strip- based */
 #define	TIFF_MAPPED		0x00800	/* file is mapped into memory */
 #define	TIFF_POSTENCODE		0x01000	/* need call to postencode routine */
 #define	TIFF_INSUBIFD		0x02000	/* currently writing a subifd */
 #define	TIFF_UPSAMPLED		0x04000	/* library is doing data up-sampling */
 #define	TIFF_STRIPCHOP		0x08000	/* enable strip chopping support */
 #define	TIFF_HEADERONLY		0x10000	/* read header only, do not process */
 					/* the first directory */
 #define TIFF_NOREADRAW		0x20000 /* skip reading of raw uncompressed */
 					/* image data */
 #define	TIFF_INCUSTOMIFD	0x40000	/* currently writing a custom IFD */
 	toff_t		tif_diroff;	/* file offset of current directory */
 	toff_t		tif_nextdiroff;	/* file offset of following directory */
 	toff_t*		tif_dirlist;	/* list of offsets to already seen */
 					/* directories to prevent IFD looping */
 	tsize_t		tif_dirlistsize;/* number of entires in offset list */
 	uint16		tif_dirnumber;  /* number of already seen directories */
 	TIFFDirectory	tif_dir;	/* internal rep of current directory */
 	TIFFDirectory	tif_customdir;	/* custom IFDs are separated from
 					   the main ones */
 	TIFFHeader	tif_header;	/* file's header block */
 	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 */
 /* SubIFD support */
 	uint16		tif_nsubifd;	/* remaining subifds to write */
 	toff_t		tif_subifdoff;	/* offset for patching SubIFD link */
 /* 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 */
 	int		tif_decodestatus;
 	TIFFBoolMethod	tif_setupdecode;/* called once before predecode */
 	TIFFPreMethod	tif_predecode;	/* pre- row/strip/tile decoding */
 	TIFFBoolMethod	tif_setupencode;/* called once before preencode */
 	int		tif_encodestatus;
 	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)
 					   FIXME: it should be tsize_t */
 	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 */
 	size_t		tif_nfields;	/* # entries in registered tag table */
 	const TIFFFieldInfo *tif_foundfield;/* cached pointer to already found tag */
         TIFFTagMethods  tif_tagmethods; /* tag get/set/print routines */
         TIFFClientInfoLink *tif_clientinfo; /* extra client information. */
 };

 #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 TIFFhowmany8(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3)
 #define	TIFFroundup(x, y) (TIFFhowmany(x,y)*(y))

 #define TIFFmax(A,B) ((A)>(B)?(A):(B))
 #define TIFFmin(A,B) ((A)<(B)?(A):(B))

 #define TIFFArrayCount(a) (sizeof (a) / sizeof ((a)[0]))

 #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  _TIFFNoPreCode (TIFF*, tsample_t);
 extern	int _TIFFNoSeek(TIFF*, uint32);
 extern	void _TIFFSwab16BitData(TIFF*, tidata_t, tsize_t);
 extern	void _TIFFSwab24BitData(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	int TIFFDefaultDirectory(TIFF*);
 extern	void _TIFFSetDefaultCompressionState(TIFF*);
 extern	int TIFFSetCompressionScheme(TIFF*, int);
 extern	int TIFFSetDefaultCompressionState(TIFF*);
 extern	uint32 _TIFFDefaultStripSize(TIFF*, uint32);
 extern	void _TIFFDefaultTileSize(TIFF*, uint32*, uint32*);
 extern	int _TIFFDataSize(TIFFDataType);

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

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

 extern	TIFFErrorHandler _TIFFwarningHandler;
 extern	TIFFErrorHandler _TIFFerrorHandler;
 extern	TIFFErrorHandlerExt _TIFFwarningHandlerExt;
 extern	TIFFErrorHandlerExt _TIFFerrorHandlerExt;

 extern	tdata_t _TIFFCheckMalloc(TIFF*, size_t, size_t, const char*);
 extern	tdata_t _TIFFCheckRealloc(TIFF*, tdata_t, size_t, size_t, const char*);

 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_ */

 /* vim: set ts=8 sts=8 sw=8 noet: */
	/* $Id: tiffiop.h,v 1.27 2009/09/06 13:11:29 drolon Exp $ */

	/*
	* 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.
	*/

	#include "tif_config.h"

	#ifdef HAVE_FCNTL_H
	# include <fcntl.h>
	#endif

	#ifdef HAVE_SYS_TYPES_H
	# include <sys/types.h>
	#endif

	#ifdef HAVE_STRING_H
	# include <string.h>
	#endif

	#ifdef HAVE_ASSERT_H
	# include <assert.h>
	#else
	# define assert(x)
	#endif

	#ifdef HAVE_SEARCH_H
	# include <search.h>
	#else
	extern void lfind(const void , const void , size_t , size_t,
	int ()(const void , const void *));
	#endif

	/*
	Libtiff itself does not require a 64-bit type, but bundled TIFF
	utilities may use it.
	*/
	#define TIFF_INT64_T signed long long
	#define TIFF_UINT64_T unsigned long long

	#include "tiffio.h"
	#include "tif_dir.h"

	#ifndef STRIP_SIZE_DEFAULT
	# define STRIP_SIZE_DEFAULT 8192
	#endif

	#define streq(a,b) (strcmp(a,b) == 0)

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

	typedef struct client_info {
	struct client_info *next;
	void *data;
	char *name;
	} TIFFClientInfoLink;

	/*
	* 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 (TIFFCodeMethod)(TIFF, tidata_t, tsize_t, tsample_t);
	typedef int (TIFFSeekMethod)(TIFF, uint32);
	typedef void (TIFFPostMethod)(TIFF, tidata_t, tsize_t);
	typedef uint32 (TIFFStripMethod)(TIFF, uint32);
	typedef void (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 0x00003 /* natural bit fill order for machine */
	#define TIFF_DIRTYHEADER 0x00004 /* header must be written on close */
	#define TIFF_DIRTYDIRECT 0x00008 /* current directory must be written */
	#define TIFF_BUFFERSETUP 0x00010 /* data buffers setup */
	#define TIFF_CODERSETUP 0x00020 /* encoder/decoder setup done */
	#define TIFF_BEENWRITING 0x00040 /* written 1+ scanlines to file */
	#define TIFF_SWAB 0x00080 /* byte swap file information */
	#define TIFF_NOBITREV 0x00100 /* inhibit bit reversal logic */
	#define TIFF_MYBUFFER 0x00200 /* my raw data buffer; free on close */
	#define TIFF_ISTILED 0x00400 /* file is tile, not strip- based */
	#define TIFF_MAPPED 0x00800 /* file is mapped into memory */
	#define TIFF_POSTENCODE 0x01000 /* need call to postencode routine */
	#define TIFF_INSUBIFD 0x02000 /* currently writing a subifd */
	#define TIFF_UPSAMPLED 0x04000 /* library is doing data up-sampling */
	#define TIFF_STRIPCHOP 0x08000 /* enable strip chopping support */
	#define TIFF_HEADERONLY 0x10000 /* read header only, do not process */
	/* the first directory */
	#define TIFF_NOREADRAW 0x20000 /* skip reading of raw uncompressed */
	/* image data */
	#define TIFF_INCUSTOMIFD 0x40000 /* currently writing a custom IFD */
	toff_t tif_diroff; /* file offset of current directory */
	toff_t tif_nextdiroff; /* file offset of following directory */
	toff_t* tif_dirlist; /* list of offsets to already seen */
	/* directories to prevent IFD looping */
	tsize_t tif_dirlistsize;/* number of entires in offset list */
	uint16 tif_dirnumber; /* number of already seen directories */
	TIFFDirectory tif_dir; /* internal rep of current directory */
	TIFFDirectory tif_customdir; /* custom IFDs are separated from
	the main ones */
	TIFFHeader tif_header; /* file's header block */
	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 */
	/* SubIFD support */
	uint16 tif_nsubifd; /* remaining subifds to write */
	toff_t tif_subifdoff; /* offset for patching SubIFD link */
	/* 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 */
	int tif_decodestatus;
	TIFFBoolMethod tif_setupdecode;/* called once before predecode */
	TIFFPreMethod tif_predecode; /* pre- row/strip/tile decoding */
	TIFFBoolMethod tif_setupencode;/* called once before preencode */
	int tif_encodestatus;
	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)
	FIXME: it should be tsize_t */
	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 */
	size_t tif_nfields; /* # entries in registered tag table */
	const TIFFFieldInfo tif_foundfield;/ cached pointer to already found tag */
	TIFFTagMethods tif_tagmethods; /* tag get/set/print routines */
	TIFFClientInfoLink tif_clientinfo; / extra client information. */
	};

	#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 TIFFhowmany8(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3)
	#define TIFFroundup(x, y) (TIFFhowmany(x,y)*(y))

	#define TIFFmax(A,B) ((A)>(B)?(A):(B))
	#define TIFFmin(A,B) ((A)<(B)?(A):(B))

	#define TIFFArrayCount(a) (sizeof (a) / sizeof ((a)[0]))

	#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 _TIFFNoPreCode (TIFF*, tsample_t);
	extern int _TIFFNoSeek(TIFF*, uint32);
	extern void _TIFFSwab16BitData(TIFF*, tidata_t, tsize_t);
	extern void _TIFFSwab24BitData(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 int TIFFDefaultDirectory(TIFF*);
	extern void _TIFFSetDefaultCompressionState(TIFF*);
	extern int TIFFSetCompressionScheme(TIFF*, int);
	extern int TIFFSetDefaultCompressionState(TIFF*);
	extern uint32 _TIFFDefaultStripSize(TIFF*, uint32);
	extern void _TIFFDefaultTileSize(TIFF, uint32, uint32*);
	extern int _TIFFDataSize(TIFFDataType);

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

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

	extern TIFFErrorHandler _TIFFwarningHandler;
	extern TIFFErrorHandler _TIFFerrorHandler;
	extern TIFFErrorHandlerExt _TIFFwarningHandlerExt;
	extern TIFFErrorHandlerExt _TIFFerrorHandlerExt;

	extern tdata_t _TIFFCheckMalloc(TIFF, size_t, size_t, const char);
	extern tdata_t _TIFFCheckRealloc(TIFF, tdata_t, size_t, size_t, const char);

	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_ */

	/* vim: set ts=8 sts=8 sw=8 noet: */