mirror of https://github.com/GNOME/gimp.git
200 lines
7.6 KiB
C
200 lines
7.6 KiB
C
/******************************************************************************/
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/* Peter Kirchgessner */
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/* e-mail: pkirchg@aol.com */
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/* WWW : http://members.aol.com/pkirchg */
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/******************************************************************************/
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/* #BEG-HDR */
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/* */
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/* Package : FITS reading/writing library */
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/* Modul-Name : fitsrw.h */
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/* Description : Include file for FITS-r/w-library */
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/* Function(s) : */
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/* Author : P. Kirchgessner */
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/* Date of Gen. : 12-Apr-97 */
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/* Last modified : 17-May-97 */
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/* Version : 0.10 */
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/* Compiler Opt. : */
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/* Changes : */
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/* */
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/* #END-HDR */
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/******************************************************************************/
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#ifndef __FITS_IO_H__
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#define __FITS_IO_H__
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#define FITS_CARD_SIZE 80
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#define FITS_RECORD_SIZE 2880
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#define FITS_MAX_AXIS 999
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#define FITS_NADD_CARDS 128
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/* Data representations */
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typedef guchar FitsBitpix8;
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typedef gint16 FitsBitpix16;
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typedef gint32 FitsBitpix32;
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typedef float FitsBitpixM32;
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typedef double FitsBitpixM64;
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typedef gint32 FitsBool;
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typedef gint32 FitsLong;
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typedef double FitsDouble;
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typedef char FitsString[FITS_CARD_SIZE];
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typedef enum
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{
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FITS_DATA_TYPE_BITPIX_8,
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FITS_DATA_TYPE_BITPIX_16,
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FITS_DATA_TYPE_BITPIX_32,
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FITS_DATA_TYPE_BITPIX_M32,
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FITS_DATA_TYPE_BITPIX_M64,
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FITS_DATA_TYPE_FBOOL,
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FITS_DATA_TYPE_FLONG,
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FITS_DATA_TYPE_FDOUBLE,
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FITS_DATA_TYPE_FSTRING
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} FitsDataType;
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typedef union
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{
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FitsBitpix8 bitpix8;
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FitsBitpix16 bitpix16;
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FitsBitpix32 bitpix32;
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FitsBitpixM32 bitpixm32;
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FitsBitpixM64 bitpixm64;
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FitsBool fbool;
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FitsLong flong;
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FitsDouble fdouble;
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FitsString fstring;
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} FitsData;
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/* How to transform FITS pixel values */
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typedef struct _FitsPixTransform FitsPixTransform;
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struct _FitsPixTransform
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{
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gdouble pixmin, pixmax; /* Pixel values [pixmin,pixmax] should be mapped */
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gdouble datamin, datamax; /* to [datamin,datamax] */
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gdouble replacement; /* datavalue to use for blank or NaN pixels */
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gchar dsttyp; /* Destination typ ('c' = char) */
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};
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/* Record list */
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typedef struct _FitsRecordList FitsRecordList;
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struct _FitsRecordList
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{
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gchar data[FITS_RECORD_SIZE];
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FitsRecordList *next_record;
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};
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/* Header and Data Unit List */
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typedef struct _FitsHduList FitsHduList;
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struct _FitsHduList
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{
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glong header_offset; /* Offset of header in the file */
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glong data_offset; /* Offset of data in the file */
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glong data_size; /* Size of data in the HDU (including pad)*/
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glong udata_size; /* Size of used data in the HDU (excl. pad) */
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gint bpp; /* Bytes per pixel */
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gint numpic; /* Number of interpretable images in HDU */
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gint naddcards; /* Number of additional cards */
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gchar addcards[FITS_NADD_CARDS][FITS_CARD_SIZE];
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struct
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{
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gboolean nan_value; /* NaN's found in data ? */
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gboolean blank_value; /* Blanks found in data ? */
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/* Flags specifying if some cards are used */
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gchar blank; /* The corresponding data below is only */
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gchar datamin; /* valid, if the flag is set. */
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gchar datamax;
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gchar simple; /* This indicates a simple HDU */
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gchar xtension; /* This indicates an extension */
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gchar gcount;
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gchar pcount;
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gchar bzero;
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gchar bscale;
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gchar groups;
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gchar extend;
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} used;
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gdouble pixmin, pixmax; /* Minimum/Maximum pixel values */
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/* Some decoded data of the HDU: */
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gint naxis; /* Number of axes */
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gint naxisn[FITS_MAX_AXIS]; /* Sizes of axes (NAXIS1 --> naxisn[0]) */
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gint bitpix; /* Data representation (8,16,32,-16,-32) */
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/* When using the following data, */
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/* the used-flags must be checked before. */
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glong blank; /* Blank value */
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gdouble datamin, datamax; /* Minimum/Maximum physical data values */
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gchar xtension[FITS_CARD_SIZE];/* Type of extension */
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glong gcount, pcount; /* Used by XTENSION */
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gdouble bzero, bscale; /* Transformation values */
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gint groups; /* Random groups indicator */
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gint extend; /* Extend flag */
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FitsRecordList *header_record_list; /* Header records read in */
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FitsHduList *next_hdu;
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};
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typedef struct _FitsFile FitsFile;
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struct _FitsFile
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{
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FILE *fp; /* File pointer to fits file */
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gchar openmode; /* Mode the file was opened (0, 'r', 'w') */
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gint n_hdu; /* Number of HDUs in file */
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gint n_pic; /* Total number of interpretable pictures */
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gboolean nan_used; /* NaN's used in the file ? */
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gboolean blank_used; /* Blank's used in the file ? */
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FitsHduList *hdu_list; /* Header and Data Unit List */
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};
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/* User callable functions of the FITS-library */
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FitsFile * fits_open (const gchar *filename,
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const gchar *openmode);
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void fits_close (FitsFile *ff);
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FitsHduList * fits_add_hdu (FitsFile *ff);
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gint fits_add_card (FitsHduList *hdulist,
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const gchar *card);
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gint fits_write_header (FitsFile *ff,
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FitsHduList *hdulist);
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FitsHduList * fits_image_info (FitsFile *ff,
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gint picind,
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gint *hdupicind);
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FitsHduList * fits_seek_image (FitsFile *ff,
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gint picind);
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void fits_print_header (FitsHduList *hdr);
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FitsData * fits_decode_card (const gchar *card,
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FitsDataType data_type);
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gchar * fits_search_card (FitsRecordList *rl,
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gchar *keyword);
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gint fits_read_pixel (FitsFile *ff,
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FitsHduList *hdulist,
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gint npix,
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FitsPixTransform *trans,
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void *buf);
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gchar * fits_get_error (void);
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/* Demo functions */
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#define FITS_NO_DEMO
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gint fits_to_pgmraw (gchar *fitsfile,
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gchar *pgmfile);
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gint pgmraw_to_fits (gchar *pgmfile,
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gchar *fitsfile);
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#endif /* __FITS_IO_H__ */
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