/* $Id$ */

/*
 * 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 _TIFFDIR_
#define	_TIFFDIR_
/*
 * ``Library-private'' Directory-related Definitions.
 */

typedef struct {
	const TIFFFieldInfo  *info;
	int             count;
	void           *value;
} TIFFTagValue;

/*
 * Internal format of a TIFF directory entry.
 */
typedef struct {
#define FIELD_SETLONGS 4
	/* bit vector of fields that are set */
	unsigned long td_fieldsset[FIELD_SETLONGS];

	uint32  td_imagewidth, td_imagelength, td_imagedepth;
	uint32  td_tilewidth, td_tilelength, td_tiledepth;
	uint32  td_subfiletype;
	uint16  td_bitspersample;
	uint16  td_sampleformat;
	uint16  td_compression;
	uint16  td_photometric;
	uint16  td_threshholding;
	uint16  td_fillorder;
	uint16  td_orientation;
	uint16  td_samplesperpixel;
	uint32  td_rowsperstrip;
	uint16  td_minsamplevalue, td_maxsamplevalue;
	double  td_sminsamplevalue, td_smaxsamplevalue;
	float   td_xresolution, td_yresolution;
	uint16  td_resolutionunit;
	uint16  td_planarconfig;
	float   td_xposition, td_yposition;
	uint16  td_pagenumber[2];
	uint16* td_colormap[3];
	uint16  td_halftonehints[2];
	uint16  td_extrasamples;
	uint16* td_sampleinfo;
	/* even though the name is misleading, td_stripsperimage is the number
	 * of striles (=strips or tiles) per plane, and td_nstrips the total
	 * number of striles */
	uint32  td_stripsperimage;  
	uint32  td_nstrips;              /* size of offset & bytecount arrays */
	uint64* td_stripoffset;
	uint64* td_stripbytecount;
	int     td_stripbytecountsorted; /* is the bytecount array sorted ascending? */
	uint16  td_nsubifd;
	uint64* td_subifd;
	/* YCbCr parameters */
	uint16  td_ycbcrsubsampling[2];
	uint16  td_ycbcrpositioning;
	/* Colorimetry parameters */
	uint16* td_transferfunction[3];
	/* CMYK parameters */
	int     td_inknameslen;
	char*   td_inknames;

	int     td_customValueCount;
        TIFFTagValue *td_customValues;
} TIFFDirectory;

/*
 * Field flags used to indicate fields that have
 * been set in a directory, and to reference fields
 * when manipulating a directory.
 */

/*
 * FIELD_IGNORE is used to signify tags that are to
 * be processed but otherwise ignored.  This permits
 * antiquated tags to be quietly read and discarded.
 * Note that a bit *is* allocated for ignored tags;
 * this is understood by the directory reading logic
 * which uses this fact to avoid special-case handling
 */
#define FIELD_IGNORE                   0

/* multi-item fields */
#define FIELD_IMAGEDIMENSIONS          1
#define FIELD_TILEDIMENSIONS           2
#define FIELD_RESOLUTION               3
#define FIELD_POSITION                 4

/* single-item fields */
#define FIELD_SUBFILETYPE              5
#define FIELD_BITSPERSAMPLE            6
#define FIELD_COMPRESSION              7
#define FIELD_PHOTOMETRIC              8
#define FIELD_THRESHHOLDING            9
#define FIELD_FILLORDER                10
#define FIELD_ORIENTATION              15
#define FIELD_SAMPLESPERPIXEL          16
#define FIELD_ROWSPERSTRIP             17
#define FIELD_MINSAMPLEVALUE           18
#define FIELD_MAXSAMPLEVALUE           19
#define FIELD_PLANARCONFIG             20
#define FIELD_RESOLUTIONUNIT           22
#define FIELD_PAGENUMBER               23
#define FIELD_STRIPBYTECOUNTS          24
#define FIELD_STRIPOFFSETS             25
#define FIELD_COLORMAP                 26
#define FIELD_EXTRASAMPLES             31
#define FIELD_SAMPLEFORMAT             32
#define FIELD_SMINSAMPLEVALUE          33
#define FIELD_SMAXSAMPLEVALUE          34
#define FIELD_IMAGEDEPTH               35
#define FIELD_TILEDEPTH                36
#define FIELD_HALFTONEHINTS            37
#define FIELD_YCBCRSUBSAMPLING         39
#define FIELD_YCBCRPOSITIONING         40
#define FIELD_TRANSFERFUNCTION         44
#define FIELD_INKNAMES                 46
#define FIELD_SUBIFD                   49
/*      FIELD_CUSTOM (see tiffio.h)    65 */
/* end of support for well-known tags; codec-private tags follow */
#define FIELD_CODEC                    66  /* base of codec-private tags */


/*
 * Pseudo-tags don't normally need field bits since they
 * are not written to an output file (by definition).
 * The library also has express logic to always query a
 * codec for a pseudo-tag so allocating a field bit for
 * one is a waste.   If codec wants to promote the notion
 * of a pseudo-tag being ``set'' or ``unset'' then it can
 * do using internal state flags without polluting the
 * field bit space defined for real tags.
 */
#define FIELD_PSEUDO			0

#define FIELD_LAST			(32*FIELD_SETLONGS-1)

#define BITn(n)				(((unsigned long)1L)<<((n)&0x1f))
#define BITFIELDn(tif, n)		((tif)->tif_dir.td_fieldsset[(n)/32])
#define TIFFFieldSet(tif, field)	(BITFIELDn(tif, field) & BITn(field))
#define TIFFSetFieldBit(tif, field)	(BITFIELDn(tif, field) |= BITn(field))
#define TIFFClrFieldBit(tif, field)	(BITFIELDn(tif, field) &= ~BITn(field))

#define FieldSet(fields, f)		(fields[(f)/32] & BITn(f))
#define ResetFieldBit(fields, f)	(fields[(f)/32] &= ~BITn(f))

#if defined(__cplusplus)
extern "C" {
#endif
extern const TIFFFieldInfoArray* _TIFFGetFieldInfo(void);
extern const TIFFFieldInfoArray* _TIFFGetExifFieldInfo(void);
extern void _TIFFSetupFieldInfo(TIFF* tif, const TIFFFieldInfoArray* infoarray);
extern int _TIFFMergeFieldInfo(TIFF*, const TIFFFieldInfo[], uint32);
extern void _TIFFPrintFieldInfo(TIFF*, FILE*);

#define _TIFFFindFieldInfo         TIFFFindFieldInfo
#define _TIFFFindFieldInfoByName   TIFFFindFieldInfoByName
#define _TIFFFieldWithTag          TIFFFieldWithTag
#define _TIFFFieldWithName         TIFFFieldWithName

struct _TIFFFieldInfoArray;

struct _TIFFField {
	uint32 field_tag;                                     /* field's tag */
	short field_readcount;                                /* read count/TIFF_VARIABLE/TIFF_SPP */
	short field_writecount;                               /* write count/TIFF_VARIABLE */
	TIFFDataType field_type;                              /* type of associated data */
	uint32 reserved;                                      /* reserved for future extension */
	TIFFSetGetFieldType set_field_type;                   /* type to be passed to TIFFSetField */
	TIFFSetGetFieldType get_field_type;                   /* type to be passed to TIFFGetField */
	unsigned short field_bit;                             /* bit in fieldsset bit vector */
	unsigned char field_oktochange;                       /* if true, can change while writing */
	unsigned char field_passcount;                        /* if true, pass dir count on set */
	char* field_name;                                     /* ASCII name */
	const struct _TIFFFieldInfoArray* field_subfields;    /* if field points to child ifds, child ifd field definition array */
};

typedef struct _TIFFField TIFFField;

typedef enum {
	tfiatImage,
	tfiatExif,
	tfiatOther,
} TIFFFieldInfoArrayType;

struct _TIFFFieldInfoArray {
	TIFFFieldInfoArrayType type;    /* array type, will be used to determine if IFD is image and such */
	uint32 allocated;               /* allocated size, 0 if constant, other if modified by future definition extension support */
	uint32 used;                    /* size of array */
	const TIFFField* fieldinfo;     /* actual field info */
};

extern int _TIFFMergeField(TIFF*, const TIFFField[], uint32);
extern const TIFFField* _TIFFFindOrRegisterFieldInfo(TIFF *, uint32,
						     TIFFDataType);
extern  TIFFField* _TIFFCreateAnonField(TIFF *, uint32, TIFFDataType);

#if defined(__cplusplus)
}
#endif
#endif /* _TIFFDIR_ */

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

