Category : C Source Code
Archive   : TIFTOOL.ZIP
Filename : IMAG.H

/* imag.h - useful declarations for doing imaging
*
* made 88-10-31
*/

/*************************** #define's ************************/


/* TAG FIELD INDICES: (not to be confused with actual tag values -- see
* tiff.h for those). Also note that I only need define the things that
* I currently care about, to save a little space.
*
* this must be kept in numerical order by tag (see tiff.h), as of 88-10-12,
* since I am writing them out in the order they appear in the IMAG array.
*/
#define X_NEWSUBFILETYPE 0
#define X_IMAGEWIDTH 1
#define X_IMAGELENGTH 2
#define X_BITSPERSAMPLE 3
#define X_COMPRESSION 4
#define X_PHOTOMETRICINTERP 5
#define X_STRIPOFFSETS 6
#define X_SAMPLES 7 /* SamplesPerPixel */
#define X_ROWSPERSTRIP 8
#define X_STRIPBYTECOUNTS 9
#define X_XRESOLUTION 10
#define X_YRESOLUTION 11
#define X_PLANAR 12 /* PlanarConfiguration */
#define X_GRAYUNIT 13
#define X_GRAYCURVE 14
#define X_RESOLUTIONUNIT 15
#define X_COLORCURVES 16
#define X_PREDICTOR 17 /* 88-09-19 */

#define NTFIELDS 18 /* KEEP THIS CURRENT!!! (one more than largest value) */

/* shorthand ways of getting to field data. Note: assumes something has
* converted if necessary to my standard data type for that field. See
* tiff.c for the code that determines the current standard type for each field.
*/
#define dwNewSubfileType tf[X_NEWSUBFILETYPE].val.Tdword /* 88-09-12 */

#define iImageWidth tf[X_IMAGEWIDTH].val.Tword[0]
#define iImageLength tf[X_IMAGELENGTH].val.Tword[0]
#define iBitsPerSample tf[X_BITSPERSAMPLE].val.Tword[0] /* assumes BitsPerSample values are equal! */
#define iSamples tf[X_SAMPLES].val.Tword[0] /* SamplesPerPixel */
#define iCompression tf[X_COMPRESSION].val.Tword[0]
# define PACKINTOBYTES 1
# define CCITT1D 2
# define COMPR5 5
# define TIFFPACKBITS 32773 /* MacPaint scheme in TIFF file */
#define iPhotometricInterpretation tf[X_PHOTOMETRICINTERP].val.Tword[0]
# define WHITEZERO 0
# define BLACKZERO 1
# define TIFFRGB 2
#define hSTRIPOffsets tf[X_STRIPOFFSETS].Thandle
#define iRowsPerStrip tf[X_ROWSPERSTRIP].val.Tword[0]
#define fXResolution tf[X_XRESOLUTION].val.Tfloat
#define fYResolution tf[X_YRESOLUTION].val.Tfloat
#define iPlanar tf[X_PLANAR].val.Tword[0]
# define CHUNKY 1 /* RGB RGB RGB */
# define PLANAR 2 /* RRR GGG BBB, in separate planes */
#define iGrayUnit tf[X_GRAYUNIT].val.Tword[0]
#define hGrayCurve tf[X_GRAYCURVE].Thandle
#define iResolutionUnit tf[X_RESOLUTIONUNIT].val.Tword[0]
# define RES_UNIT_NO_UNIT 1
# define RES_UNIT_INCH 2
# define RES_UNIT_CM 3
#define hStripByteCounts tf[X_STRIPBYTECOUNTS].Thandle
#define hColorCurves tf[X_COLORCURVES].Thandle
#define iPredictor tf[X_PREDICTOR].val.Tword[0]
# define PREDICTOR_NONE 1
# define PREDICTOR_HDIFF 2

/* shorthands for existence flags
*/
#define eNewSubfileType tf[X_NEWSUBFILETYPE].Texists
#define eImageWidth tf[X_IMAGEWIDTH].Texists
#define eImageLength tf[X_IMAGELENGTH].Texists
#define eSamples tf[X_SAMPLES].Texists
#define eCompression tf[X_COMPRESSION].Texists
#define ePhotometricInterpretation tf[X_PHOTOMETRICINTERP].Texists
#define eStripOffsets tf[X_STRIPOFFSETS].Texists
#define eXResolution tf[X_XRESOLUTION].Texists
#define eYResolution tf[X_YRESOLUTION].Texists
#define ePlanar tf[X_PLANAR].Texists
#define eGrayUnit tf[X_GRAYUNIT].Texists
#define eGrayCurve tf[X_GRAYCURVE].Texists
#define eResolutionUnit tf[X_RESOLUTIONUNIT].Texists
#define eStripByteCounts tf[X_STRIPBYTECOUNTS].Texists
#define eColorCurves tf[X_COLORCURVES].Texists
#define ePredictor tf[X_PREDICTOR].Texists

/********************* structure definitions *******************/


/* Tiff Field Structure. An array of these things is the main part of
* the IMAG structure, below.
*/
typedef struct {
BOOL Texists;
BOOL Talloc; /* true if Thandle is being used */
WORD Ttag;
WORD Ttype;
DWORD Tlength;
HANDLE Thandle; /* for things > 4 bytes, except for TIFF RATIONAL */
union {
BYTE Tbyte[4];
char Tchar[4];
WORD Tword[2]; /* from TIFF SHORT */
short Tsigned[2]; /* from TIFF SIGNED */
DWORD Tdword; /* from TIFF LONG */
float Tfloat; /* from TIFF RATIONAL */
} val;
DWORD Tentryoffset; /* file/memory offset of the TIFF directory
* entry.
*/
} TFIELD;


/* structure containing all available information about an image
* this structure is never to be written to disk directly; use the
* TIFF routines.
*/
typedef struct {
WORD iFileType;
#define INTELTIFF (0x4949)
#define MOTOROLATIFF (0x4d4d)

WORD iVersion;
#define VERSION42 42

/* THE REAL TIFF FIELDS:
*/
TFIELD tf[NTFIELDS];

} IMAG, FAR * LPIMAG;

/************************** function declarations *************************/

void InitImag ARGS((IMAG *));
void CloseImag ARGS((IMAG *));
RC TfStore ARGS((WORD, WORD, DWORD, LPSTR, TFIELD *));
RC TfCopy ARGS((IMAG *, IMAG *, WORD));