312 lines
11 KiB
C
312 lines
11 KiB
C
/*
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* Copyright (c) 1988-1997 Sam Leffler
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* Copyright (c) 1991-1997 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the names of
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* Sam Leffler and Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Sam Leffler and Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef _TIFFDIR_
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#define _TIFFDIR_
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#include "tiff.h"
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#include "tiffio.h"
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/*
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* ``Library-private'' Directory-related Definitions.
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*/
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typedef struct {
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const TIFFField *info;
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int count;
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void *value;
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} TIFFTagValue;
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/*
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* TIFF Image File Directories are comprised of a table of field
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* descriptors of the form shown below. The table is sorted in
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* ascending order by tag. The values associated with each entry are
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* disjoint and may appear anywhere in the file (so long as they are
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* placed on a word boundary).
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*
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* If the value is 4 bytes or less, in ClassicTIFF, or 8 bytes or less in
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* BigTIFF, then it is placed in the offset field to save space. If so,
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* it is left-justified in the offset field.
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*/
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typedef struct {
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uint16 tdir_tag; /* see below */
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uint16 tdir_type; /* data type; see below */
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uint64 tdir_count; /* number of items; length in spec */
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union {
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uint16 toff_short;
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uint32 toff_long;
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uint64 toff_long8;
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} tdir_offset; /* either offset or the data itself if fits */
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} TIFFDirEntry;
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/*
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* Internal format of a TIFF directory entry.
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*/
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typedef struct {
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#define FIELD_SETLONGS 4
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/* bit vector of fields that are set */
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unsigned long td_fieldsset[FIELD_SETLONGS];
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uint32 td_imagewidth, td_imagelength, td_imagedepth;
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uint32 td_tilewidth, td_tilelength, td_tiledepth;
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uint32 td_subfiletype;
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uint16 td_bitspersample;
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uint16 td_sampleformat;
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uint16 td_compression;
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uint16 td_photometric;
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uint16 td_threshholding;
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uint16 td_fillorder;
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uint16 td_orientation;
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uint16 td_samplesperpixel;
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uint32 td_rowsperstrip;
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uint16 td_minsamplevalue, td_maxsamplevalue;
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double* td_sminsamplevalue;
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double* td_smaxsamplevalue;
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float td_xresolution, td_yresolution;
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uint16 td_resolutionunit;
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uint16 td_planarconfig;
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float td_xposition, td_yposition;
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uint16 td_pagenumber[2];
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uint16* td_colormap[3];
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uint16 td_halftonehints[2];
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uint16 td_extrasamples;
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uint16* td_sampleinfo;
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/* even though the name is misleading, td_stripsperimage is the number
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* of striles (=strips or tiles) per plane, and td_nstrips the total
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* number of striles */
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uint32 td_stripsperimage;
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uint32 td_nstrips; /* size of offset & bytecount arrays */
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uint64* td_stripoffset;
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uint64* td_stripbytecount;
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int td_stripbytecountsorted; /* is the bytecount array sorted ascending? */
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#if defined(DEFER_STRILE_LOAD)
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TIFFDirEntry td_stripoffset_entry; /* for deferred loading */
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TIFFDirEntry td_stripbytecount_entry; /* for deferred loading */
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#endif
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uint16 td_nsubifd;
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uint64* td_subifd;
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/* YCbCr parameters */
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uint16 td_ycbcrsubsampling[2];
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uint16 td_ycbcrpositioning;
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/* Colorimetry parameters */
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uint16* td_transferfunction[3];
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float* td_refblackwhite;
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/* CMYK parameters */
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int td_inknameslen;
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char* td_inknames;
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int td_customValueCount;
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TIFFTagValue *td_customValues;
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} TIFFDirectory;
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/*
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* Field flags used to indicate fields that have been set in a directory, and
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* to reference fields when manipulating a directory.
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*/
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/*
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* FIELD_IGNORE is used to signify tags that are to be processed but otherwise
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* ignored. This permits antiquated tags to be quietly read and discarded.
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* Note that a bit *is* allocated for ignored tags; this is understood by the
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* directory reading logic which uses this fact to avoid special-case handling
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*/
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#define FIELD_IGNORE 0
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/* multi-item fields */
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#define FIELD_IMAGEDIMENSIONS 1
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#define FIELD_TILEDIMENSIONS 2
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#define FIELD_RESOLUTION 3
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#define FIELD_POSITION 4
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/* single-item fields */
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#define FIELD_SUBFILETYPE 5
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#define FIELD_BITSPERSAMPLE 6
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#define FIELD_COMPRESSION 7
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#define FIELD_PHOTOMETRIC 8
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#define FIELD_THRESHHOLDING 9
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#define FIELD_FILLORDER 10
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#define FIELD_ORIENTATION 15
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#define FIELD_SAMPLESPERPIXEL 16
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#define FIELD_ROWSPERSTRIP 17
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#define FIELD_MINSAMPLEVALUE 18
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#define FIELD_MAXSAMPLEVALUE 19
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#define FIELD_PLANARCONFIG 20
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#define FIELD_RESOLUTIONUNIT 22
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#define FIELD_PAGENUMBER 23
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#define FIELD_STRIPBYTECOUNTS 24
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#define FIELD_STRIPOFFSETS 25
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#define FIELD_COLORMAP 26
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#define FIELD_EXTRASAMPLES 31
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#define FIELD_SAMPLEFORMAT 32
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#define FIELD_SMINSAMPLEVALUE 33
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#define FIELD_SMAXSAMPLEVALUE 34
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#define FIELD_IMAGEDEPTH 35
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#define FIELD_TILEDEPTH 36
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#define FIELD_HALFTONEHINTS 37
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#define FIELD_YCBCRSUBSAMPLING 39
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#define FIELD_YCBCRPOSITIONING 40
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#define FIELD_REFBLACKWHITE 41
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#define FIELD_TRANSFERFUNCTION 44
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#define FIELD_INKNAMES 46
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#define FIELD_SUBIFD 49
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/* FIELD_CUSTOM (see tiffio.h) 65 */
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/* end of support for well-known tags; codec-private tags follow */
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#define FIELD_CODEC 66 /* base of codec-private tags */
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/*
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* Pseudo-tags don't normally need field bits since they are not written to an
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* output file (by definition). The library also has express logic to always
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* query a codec for a pseudo-tag so allocating a field bit for one is a
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* waste. If codec wants to promote the notion of a pseudo-tag being ``set''
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* or ``unset'' then it can do using internal state flags without polluting
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* the field bit space defined for real tags.
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*/
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#define FIELD_PSEUDO 0
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#define FIELD_LAST (32*FIELD_SETLONGS-1)
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#define BITn(n) (((unsigned long)1L)<<((n)&0x1f))
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#define BITFIELDn(tif, n) ((tif)->tif_dir.td_fieldsset[(n)/32])
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#define TIFFFieldSet(tif, field) (BITFIELDn(tif, field) & BITn(field))
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#define TIFFSetFieldBit(tif, field) (BITFIELDn(tif, field) |= BITn(field))
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#define TIFFClrFieldBit(tif, field) (BITFIELDn(tif, field) &= ~BITn(field))
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#define FieldSet(fields, f) (fields[(f)/32] & BITn(f))
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#define ResetFieldBit(fields, f) (fields[(f)/32] &= ~BITn(f))
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typedef enum {
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TIFF_SETGET_UNDEFINED = 0,
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TIFF_SETGET_ASCII = 1,
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TIFF_SETGET_UINT8 = 2,
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TIFF_SETGET_SINT8 = 3,
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TIFF_SETGET_UINT16 = 4,
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TIFF_SETGET_SINT16 = 5,
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TIFF_SETGET_UINT32 = 6,
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TIFF_SETGET_SINT32 = 7,
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TIFF_SETGET_UINT64 = 8,
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TIFF_SETGET_SINT64 = 9,
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TIFF_SETGET_FLOAT = 10,
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TIFF_SETGET_DOUBLE = 11,
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TIFF_SETGET_IFD8 = 12,
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TIFF_SETGET_INT = 13,
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TIFF_SETGET_UINT16_PAIR = 14,
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TIFF_SETGET_C0_ASCII = 15,
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TIFF_SETGET_C0_UINT8 = 16,
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TIFF_SETGET_C0_SINT8 = 17,
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TIFF_SETGET_C0_UINT16 = 18,
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TIFF_SETGET_C0_SINT16 = 19,
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TIFF_SETGET_C0_UINT32 = 20,
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TIFF_SETGET_C0_SINT32 = 21,
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TIFF_SETGET_C0_UINT64 = 22,
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TIFF_SETGET_C0_SINT64 = 23,
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TIFF_SETGET_C0_FLOAT = 24,
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TIFF_SETGET_C0_DOUBLE = 25,
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TIFF_SETGET_C0_IFD8 = 26,
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TIFF_SETGET_C16_ASCII = 27,
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TIFF_SETGET_C16_UINT8 = 28,
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TIFF_SETGET_C16_SINT8 = 29,
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TIFF_SETGET_C16_UINT16 = 30,
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TIFF_SETGET_C16_SINT16 = 31,
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TIFF_SETGET_C16_UINT32 = 32,
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TIFF_SETGET_C16_SINT32 = 33,
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TIFF_SETGET_C16_UINT64 = 34,
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TIFF_SETGET_C16_SINT64 = 35,
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TIFF_SETGET_C16_FLOAT = 36,
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TIFF_SETGET_C16_DOUBLE = 37,
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TIFF_SETGET_C16_IFD8 = 38,
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TIFF_SETGET_C32_ASCII = 39,
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TIFF_SETGET_C32_UINT8 = 40,
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TIFF_SETGET_C32_SINT8 = 41,
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TIFF_SETGET_C32_UINT16 = 42,
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TIFF_SETGET_C32_SINT16 = 43,
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TIFF_SETGET_C32_UINT32 = 44,
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TIFF_SETGET_C32_SINT32 = 45,
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TIFF_SETGET_C32_UINT64 = 46,
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TIFF_SETGET_C32_SINT64 = 47,
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TIFF_SETGET_C32_FLOAT = 48,
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TIFF_SETGET_C32_DOUBLE = 49,
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TIFF_SETGET_C32_IFD8 = 50,
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TIFF_SETGET_OTHER = 51
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} TIFFSetGetFieldType;
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#if defined(__cplusplus)
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extern "C" {
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#endif
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extern const TIFFFieldArray* _TIFFGetFields(void);
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extern const TIFFFieldArray* _TIFFGetExifFields(void);
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extern void _TIFFSetupFields(TIFF* tif, const TIFFFieldArray* infoarray);
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extern void _TIFFPrintFieldInfo(TIFF*, FILE*);
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extern int _TIFFFillStriles(TIFF*);
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typedef enum {
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tfiatImage,
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tfiatExif,
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tfiatOther
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} TIFFFieldArrayType;
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struct _TIFFFieldArray {
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TIFFFieldArrayType type; /* array type, will be used to determine if IFD is image and such */
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uint32 allocated_size; /* 0 if array is constant, other if modified by future definition extension support */
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uint32 count; /* number of elements in fields array */
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TIFFField* fields; /* actual field info */
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};
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struct _TIFFField {
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uint32 field_tag; /* field's tag */
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short field_readcount; /* read count/TIFF_VARIABLE/TIFF_SPP */
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short field_writecount; /* write count/TIFF_VARIABLE */
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TIFFDataType field_type; /* type of associated data */
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uint32 reserved; /* reserved for future extension */
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TIFFSetGetFieldType set_field_type; /* type to be passed to TIFFSetField */
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TIFFSetGetFieldType get_field_type; /* type to be passed to TIFFGetField */
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unsigned short field_bit; /* bit in fieldsset bit vector */
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unsigned char field_oktochange; /* if true, can change while writing */
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unsigned char field_passcount; /* if true, pass dir count on set */
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char* field_name; /* ASCII name */
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TIFFFieldArray* field_subfields; /* if field points to child ifds, child ifd field definition array */
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};
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extern int _TIFFMergeFields(TIFF*, const TIFFField[], uint32);
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extern const TIFFField* _TIFFFindOrRegisterField(TIFF *, uint32, TIFFDataType);
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extern TIFFField* _TIFFCreateAnonField(TIFF *, uint32, TIFFDataType);
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extern int _TIFFCheckFieldIsValidForCodec(TIFF *tif, ttag_t tag);
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#if defined(__cplusplus)
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}
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#endif
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#endif /* _TIFFDIR_ */
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/* vim: set ts=8 sts=8 sw=8 noet: */
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/*
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* Local Variables:
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* mode: c
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* c-basic-offset: 8
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* fill-column: 78
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* End:
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*/
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