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tffdsply.hqx
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tiff.h
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1993-01-04
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2KB
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79 lines
/*
* This software is copyright 1992 by Robert Morris.
* You may freely redistribute this software as shareware
* if you do so in the same form as you got it. If you find
* this software useful, please send $12 to:
* Robert Morris
* P.O. Box 1044
* Harvard Square Station
* Cambridge, MA 02238
* ecognome@aol.com
* If you incorporate any of this software in any kind of
* commercial product, please send $2 per copy distributed
* to the above address.
*/
#ifndef tiff_h
#define tiff_h 1
/*
* this is from the TIFF 5.0 document of 8/8/88
*/
/* first eight bytes of a TIFF file: */
struct TIFFHeader{
short byteOrder; /* 0x4949: little-endian; 0x4d4d: big-endian */
short versionNumber; /* always 42 */
unsigned long offset; /* to first Image File Directory */
};
#define LittleEndian 0x4949
#define BigEndian 0x4d4d
/*
* an Image File Directory has 2 bytes with the number of entries,
* then the entries, then 4 bytes of offset to the next IFD, or 0.
*/
struct TIFFEntry{
short tag;
short type; /* TIFF_BYTE, TIFF_ASCII, TIFF_SHORT, TIFF_LONG, TIFF_RATIONAL */
long length; /* really a count */
long offset; /* offset in file, or value if <= 4 bytes */
};
#define TIFF_BYTE 1 /* 8-bit unsigned integer */
#define TIFF_ASCII 2 /* ascii string; last byte is null */
#define TIFF_SHORT 3 /* 16 bit unsigned integer */
#define TIFF_LONG 4 /* 32-bit unsigned integer */
#define TIFF_RATIONAL 5 /* two longs: numerator, denominator */
/* the entry types */
#define ColorMap 320
#define NewSubfileType 254
#define ImageWidth 256
#define ImageLength 257
#define BitsPerSample 258
#define Compression 259
#define NoCompression 1
#define LZWCompression 5
#define PackCompression 32773
#define PhotometricInterpretation 262
#define PIZeroIsWhite 0
#define PIZeroIsBlack 1
#define PIRGB 2
#define PIPalette 3
#define StripOffsets 273
#define SamplesPerPixel 277
#define RowsPerStrip 278
#define StripByteCounts 279
#define XResolution 282
#define YResolution 283
#define PlanarConfiguration 284
#define PCContiguous 1 /* RGBRGB... */
#define PCPlanar 2 /* RR...GG...BB... */
#define ResolutionUnit 296
#define Predictor 317
#define NoPredictor 1
#define HDPredictor 2
#endif tiff_h