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tiff.h
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1995-05-30
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// This may look like C code, but it is really -*- C++ -*-
/*
************************************************************************
*
* Tag Image File Format (TIFF)
*
* Class definitions for all important TIFF file data structures
*
* Tiff tag definitions were borrowed from:
* > Copyright (c) 1988, 1990 by Sam Leffler.
* > All rights reserved.
* >
* > This file is provided for unrestricted use provided that this
* > legend is included on all tape media and as a part of the
* > software program in whole or part. Users may copy, modify or
* > distribute this file at will.
* >
* > Based on Rev 5.0 from:
* > Developer's Desk Window Marketing Group
* > Aldus Corporation Microsoft Corporation
* > 411 First Ave. South 16011 NE 36th Way
* > Suite 200 Box 97017
* > Seattle, WA 98104 Redmond, WA 98073-9717
* > 206-622-5500 206-882-8080
*
*
* $Id: tiff.h,v 2.0 1995/03/06 21:56:19 oleg Exp oleg $
*
************************************************************************
*/
#ifndef _TIFF_
#define _TIFF_
/*
*------------------------------------------------------------------------
* TIFF file header
* It is always written at the very beginning of the TIFF file
*/
class EndianIn; // Opaque i/o classes
class EndianOut;
class TIFFHeader
{
unsigned short magic; // magic number (defines byte order)
unsigned short version; // TIFF version number
unsigned long diroffset; // byte offset to first directory
enum { TIFF_BIGENDIAN = 0x4d4d, // Interpretation of magic
TIFF_LITTLEENDIAN = 0x4949,
TIFF_VERSION = 42 }; // Interpretation of version
public:
TIFFHeader(void) : magic(TIFF_BIGENDIAN), version(TIFF_VERSION),
diroffset(sizeof(*this)) // Meaning the DIR follows
{} // immediately after
TIFFHeader(EndianIn& file);
void write(EndianOut& file);
unsigned long directory_offset(void) const { return diroffset; }
};
/*
*------------------------------------------------------------------------
* TIFF Image File Directories
* are comprised of a table of field descriptors of the form shown below.
* The table is sorted in ascending order by tag. The values associated
* with each entry are disjoint and may appear anywhere in the file (so
* long as they are placed on a word boundary).
*
* If the value is 4 bytes or less, then it is placed in the offset field
* to save space. If the value is less than 4 bytes, it is left-justified
* in the offset field.
*/
class TIFFDirEntry
{
public:
unsigned short tag; // see below
unsigned short type; // data type; see below
unsigned long count; // number of items; length in spec
unsigned long val_offset; // byte offset to field data
protected:
TIFFDirEntry(void) {} // For use from derived classes only
public:
enum DataType {
BYTE = 1, // 8-bit unsigned integer
ASCII = 2, // 8-bit bytes w/ last byte null
SHORT = 3, // 16-bit unsigned integer
LONG = 4, // 32-bit unsigned integer
RATIONAL = 5 // 64-bit fractional (numerator+denominator)
};
protected:
TIFFDirEntry(const short _tag, const DataType _type, const long _count,
const long _value)
: tag(_tag), type(_type), count(_count), val_offset(_value) {}
};
/* Types as defined in the TIFF standard for SUN3 */
typedef unsigned char TBYTE; /* 8-bits */
typedef unsigned char TASCII; /* 8-bits */
typedef unsigned short TSHORT; /* 16 bits */
typedef unsigned int TLONG; /* 32 bits */
typedef unsigned long TRATIONAL; /* 2 LONG's numerator : denominator */
#define INFINITY 99999
/*
*------------------------------------------------------------------------
* TIFF Tag Definitions
*
* Those marked with a + are obsoleted by revision 5.0
*/
#define TIFFTAG_SUBFILETYPE 254 /* subfile data descriptor */
#define FILETYPE_REDUCEDIMAGE 0x1 /* reduced resolution version*/
#define FILETYPE_PAGE 0x2 /* one page of many */
#define FILETYPE_MASK 0x4 /* transparency mask */
#define TIFFTAG_OSUBFILETYPE 255 /* +kind of data in subfile */
#define OFILETYPE_IMAGE 1 /* full resolution image data*/
#define OFILETYPE_REDUCEDIMAGE 2 /* reduced size image data */
#define OFILETYPE_PAGE 3 /* one page of many */
#define TIFFTAG_IMAGEWIDTH 256 /* image width in pixels */
#define TIFFTAG_IMAGELENGTH 257 /* image height in pixels */
#define TIFFTAG_BITSPERSAMPLE 258 /* bits per channel (sample) */
#define TIFFTAG_COMPRESSION 259 /* data compression technique*/
#define COMPRESSION_NONE 1 /* dump mode */
#define COMPRESSION_CCITTRLE 2 /* CCITT modified Huffman RLE*/
#define COMPRESSION_CCITTFAX3 3 /* CCITT Group 3 fax encoding*/
#define COMPRESSION_CCITTFAX4 4 /* CCITT Group 4 fax encoding*/
#define COMPRESSION_LZW 5 /* Lempel-Ziv & Welch */
#define COMPRESSION_NEXT 32766 /* NeXT 2-bit RLE */
#define COMPRESSION_CCITTRLEW 32771 /* #1 w/ word alignment */
#define COMPRESSION_PACKBITS 32773 /* Macintosh RLE */
#define COMPRESSION_THUNDERSCAN 32809 /* ThunderScan RLE */
#define COMPRESSION_PICIO 32900 /* old Pixar picio RLE */
#define COMPRESSION_SGIRLE 32901 /* Silicon Graphics RLE */
#define TIFFTAG_PHOTOMETRIC 262 /* photometric interpretation*/
#define PHOTOMETRIC_MINISWHITE 0 /* min value is white */
#define PHOTOMETRIC_MINISBLACK 1 /* min value is black */
#define PHOTOMETRIC_RGB 2 /* RGB color model */
#define PHOTOMETRIC_PALETTE 3 /* color map indexed */
#define PHOTOMETRIC_MASK 4 /* holdout mask */
#define PHOTOMETRIC_DEPTH 32768 /* z-depth data */
#define TIFFTAG_THRESHHOLDING 263 /* +thresholding used on data*/
#define THRESHHOLD_BILEVEL 1 /* b&w art scan */
#define THRESHHOLD_HALFTONE 2 /* or dithered scan */
#define THRESHHOLD_ERRORDIFFUSE 3 /* usually floyd-steinberg */
#define TIFFTAG_CELLWIDTH 264 /* +dithering matrix width */
#define TIFFTAG_CELLLENGTH 265 /* +dithering matrix height */
#define TIFFTAG_FILLORDER 266 /* +data order within a byte */
#define FILLORDER_MSB2LSB 1 /* most significant -> least */
#define FILLORDER_LSB2MSB 2 /* least significant -> most */
#define TIFFTAG_DOCUMENTNAME 269 /* name of doc. image is from*/
#define TIFFTAG_IMAGEDESCRIPTION 270 /* info about image */
#define TIFFTAG_MAKE 271 /* scanner manufacturer name */
#define TIFFTAG_MODEL 272 /* scanner model name/number */
#define TIFFTAG_STRIPOFFSETS 273 /* offsets to data strips */
#define TIFFTAG_ORIENTATION 274 /* +image orientation */
#define ORIENTATION_TOPLEFT 1 /* row 0 top, col 0 lhs */
#define ORIENTATION_TOPRIGHT 2 /* row 0 top, col 0 rhs */
#define ORIENTATION_BOTRIGHT 3 /* row 0 bottom, col 0 rhs */
#define ORIENTATION_BOTLEFT 4 /* row 0 bottom, col 0 lhs */
#define ORIENTATION_LEFTTOP 5 /* row 0 lhs, col 0 top */
#define ORIENTATION_RIGHTTOP 6 /* row 0 rhs, col 0 top */
#define ORIENTATION_RIGHTBOT 7 /* row 0 rhs, col 0 bottom */
#define ORIENTATION_LEFTBOT 8 /* row 0 lhs, col 0 bottom */
#define TIFFTAG_SAMPLESPERPIXEL 277 /* samples per pixel */
#define TIFFTAG_ROWSPERSTRIP 278 /* rows per strip of data */
#define TIFFTAG_STRIPBYTECOUNTS 279 /* bytes counts for strips */
#define TIFFTAG_MINSAMPLEVALUE 280 /* +minimum sample value */
#define TIFFTAG_MAXSAMPLEVALUE 281 /* maximum sample value */
#define TIFFTAG_XRESOLUTION 282 /* pixels/resolution in x */
#define TIFFTAG_YRESOLUTION 283 /* pixels/resolution in y */
#define TIFFTAG_PLANARCONFIG 284 /* storage organization */
#define PLANARCONFIG_CONTIG 1 /* single image plane */
#define PLANARCONFIG_SEPARATE 2 /* separate planes of data */
#define TIFFTAG_PAGENAME 285 /* page name image is from */
#define TIFFTAG_XPOSITION 286 /* x page offset of image lhs*/
#define TIFFTAG_YPOSITION 287 /* y page offset of image lhs*/
#define TIFFTAG_FREEOFFSETS 288 /* +byte offset to free block*/
#define TIFFTAG_FREEBYTECOUNTS 289 /* +sizes of free blocks */
#define TIFFTAG_GRAYRESPONSEUNIT 290 /* gray scale curve accuracy */
#define GRAYRESPONSEUNIT_10S 1 /* tenths of a unit */
#define GRAYRESPONSEUNIT_100S 2 /* hundredths of a unit */
#define GRAYRESPONSEUNIT_1000S 3 /* thousandths of a unit */
#define GRAYRESPONSEUNIT_10000S 4 /* ten-thousandths of a unit */
#define GRAYRESPONSEUNIT_100000S 5 /* hundred-thousandths */
#define TIFFTAG_GRAYRESPONSECURVE 291 /* gray scale response curve */
#define TIFFTAG_GROUP3OPTIONS 292 /* 32 flag bits */
#define GROUP3OPT_2DENCODING 0x1 /* 2-dimensional coding */
#define GROUP3OPT_UNCOMPRESSED 0x2 /* data not compressed */
#define GROUP3OPT_FILLBITS 0x4 /* fill to byte boundary */
#define TIFFTAG_GROUP4OPTIONS 293 /* 32 flag bits */
#define GROUP4OPT_UNCOMPRESSED 0x2 /* data not compressed */
#define TIFFTAG_RESOLUTIONUNIT 296 /* units of resolutions */
#define RESUNIT_NONE 1 /* no meaningful units */
#define RESUNIT_INCH 2 /* english */
#define RESUNIT_CENTIMETER 3 /* metric */
#define TIFFTAG_PAGENUMBER 297 /* page numbers of multi-page*/
#define TIFFTAG_COLORRESPONSEUNIT 300 /* color scale curve accuracy*/
#define COLORRESPONSEUNIT_10S 1 /* tenths of a unit */
#define COLORRESPONSEUNIT_100S 2 /* hundredths of a unit */
#define COLORRESPONSEUNIT_1000S 3 /* thousandths of a unit */
#define COLORRESPONSEUNIT_10000S 4 /* ten-thousandths of a unit */
#define COLORRESPONSEUNIT_100000S 5 /* hundred-thousandths */
#define TIFFTAG_COLORRESPONSECURVE 301 /* RGB response curve */
#define TIFFTAG_SOFTWARE 305 /* name & release */
#define TIFFTAG_DATETIME 306 /* creation date and time */
#define TIFFTAG_ARTIST 315 /* creator of image */
#define TIFFTAG_HOSTCOMPUTER 316 /* machine where created */
#define TIFFTAG_PREDICTOR 317 /* prediction scheme w/ LZW */
#define TIFFTAG_WHITEPOINT 318 /* image white point */
#define TIFFTAG_PRIMARYCHROMATICITIES 319 /* primary chromaticities */
#define TIFFTAG_COLORMAP 320 /* RGB map for pallette image*/
#define TIFFTAG_BADFAXLINES 326 /* lines w/ wrong pixel count*/
#define TIFFTAG_CLEANFAXDATA 327 /* regenerated line info */
#define CLEANFAXDATA_CLEAN 0 /* no errors detected */
#define CLEANFAXDATA_REGENERATED 1 /* receiver regenerated lines*/
#define CLEANFAXDATA_UNCLEAN 2 /* uncorrected errors exist */
#define TIFFTAG_CONSECUTIVEBADFAXLINES 328 /* max consecutive bad lines */
/* tags 32995-32999 are private tags registered to SGI */
#define TIFFTAG_MATTEING 32995 /* alpha channel is present */
#endif /* _TIFF_ */