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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:23:22 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:23:22 +0000 |
| commit | e42129241681dde7adae7d20697e7b421682fbb4 (patch) | |
| tree | af1fe815a5e639e68e59fabd8395ec69458b3e5e /plug-ins/file-fits | |
| parent | Initial commit. (diff) | |
| download | gimp-e42129241681dde7adae7d20697e7b421682fbb4.tar.xz gimp-e42129241681dde7adae7d20697e7b421682fbb4.zip | |
Adding upstream version 2.10.22.upstream/2.10.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plug-ins/file-fits')
| -rw-r--r-- | plug-ins/file-fits/Makefile.am | 50 | ||||
| -rw-r--r-- | plug-ins/file-fits/Makefile.in | 1004 | ||||
| -rw-r--r-- | plug-ins/file-fits/fits-io.c | 2506 | ||||
| -rw-r--r-- | plug-ins/file-fits/fits-io.h | 199 | ||||
| -rw-r--r-- | plug-ins/file-fits/fits.c | 1222 |
5 files changed, 4981 insertions, 0 deletions
diff --git a/plug-ins/file-fits/Makefile.am b/plug-ins/file-fits/Makefile.am new file mode 100644 index 0000000..0ea58fe --- /dev/null +++ b/plug-ins/file-fits/Makefile.am @@ -0,0 +1,50 @@ +## Process this file with automake to produce Makefile.in + +libgimpui = $(top_builddir)/libgimp/libgimpui-$(GIMP_API_VERSION).la +libgimpconfig = $(top_builddir)/libgimpconfig/libgimpconfig-$(GIMP_API_VERSION).la +libgimpwidgets = $(top_builddir)/libgimpwidgets/libgimpwidgets-$(GIMP_API_VERSION).la +libgimp = $(top_builddir)/libgimp/libgimp-$(GIMP_API_VERSION).la +libgimpcolor = $(top_builddir)/libgimpcolor/libgimpcolor-$(GIMP_API_VERSION).la +libgimpbase = $(top_builddir)/libgimpbase/libgimpbase-$(GIMP_API_VERSION).la +libgimpmath = $(top_builddir)/libgimpmath/libgimpmath-$(GIMP_API_VERSION).la + +if OS_WIN32 +mwindows = -mwindows +endif + +if HAVE_WINDRES +include $(top_srcdir)/build/windows/gimprc-plug-ins.rule +file_fits_RC = file-fits.rc.o +endif + +AM_LDFLAGS = $(mwindows) +AM_CFLAGS = -fno-strict-aliasing + +libexecdir = $(gimpplugindir)/plug-ins/file-fits + +libexec_PROGRAMS = file-fits + +file_fits_SOURCES = \ + fits.c \ + fits-io.c \ + fits-io.h + +AM_CPPFLAGS = \ + -I$(top_srcdir) \ + $(GTK_CFLAGS) \ + $(GEGL_CFLAGS) \ + -I$(includedir) + +LDADD = \ + $(libgimpui) \ + $(libgimpwidgets) \ + $(libgimpconfig) \ + $(libgimp) \ + $(libgimpcolor) \ + $(libgimpmath) \ + $(libgimpbase) \ + $(GTK_LIBS) \ + $(GEGL_LIBS) \ + $(RT_LIBS) \ + $(INTLLIBS) \ + $(file_fits_RC) diff --git a/plug-ins/file-fits/Makefile.in b/plug-ins/file-fits/Makefile.in new file mode 100644 index 0000000..afc57b4 --- /dev/null +++ b/plug-ins/file-fits/Makefile.in @@ -0,0 +1,1004 @@ +# Makefile.in generated by automake 1.16.2 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2020 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# Version resources for Microsoft Windows + +VPATH = @srcdir@ +am__is_gnu_make = { \ + if test -z '$(MAKELEVEL)'; then \ + false; \ + elif test -n '$(MAKE_HOST)'; then \ + true; \ + elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \ + true; \ + else \ + false; \ + fi; \ +} +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; \ + *) echo "am__make_running_with_option: internal error: invalid" \ + "target option '$${target_option-}' specified" >&2; \ + exit 1;; \ + esac; \ + has_opt=no; \ + sane_makeflags=$$MAKEFLAGS; \ + if $(am__is_gnu_make); then \ + sane_makeflags=$$MFLAGS; 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\ + install-ps-am install-strip installcheck installcheck-am \ + installdirs maintainer-clean maintainer-clean-generic \ + mostlyclean mostlyclean-compile mostlyclean-generic \ + mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \ + uninstall-am uninstall-libexecPROGRAMS + +.PRECIOUS: Makefile + + +# `windres` seems a very stupid tool and it breaks with double shlashes +# in parameter paths. Strengthen the rule a little. +@HAVE_WINDRES_TRUE@%.rc.o: +@HAVE_WINDRES_TRUE@ $(WINDRES) --define ORIGINALFILENAME_STR="$*$(EXEEXT)" \ +@HAVE_WINDRES_TRUE@ --define INTERNALNAME_STR="$*" \ +@HAVE_WINDRES_TRUE@ --define TOP_SRCDIR="`echo $(top_srcdir) | sed 's*//*/*'`" \ +@HAVE_WINDRES_TRUE@ -I"`echo $(top_srcdir)/app | sed 's%/\+%/%'`" \ +@HAVE_WINDRES_TRUE@ -I"`echo $(top_builddir)/app | sed 's%/\+%/%'`"\ +@HAVE_WINDRES_TRUE@ -I"`echo $(top_builddir) | sed 's%/\+%/%'`"\ +@HAVE_WINDRES_TRUE@ $(GIMPPLUGINRC) $@ + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/plug-ins/file-fits/fits-io.c b/plug-ins/file-fits/fits-io.c new file mode 100644 index 0000000..9d429b7 --- /dev/null +++ b/plug-ins/file-fits/fits-io.c @@ -0,0 +1,2506 @@ +/******************************************************************************/ +/* Peter Kirchgessner */ +/* e-mail: peter@kirchgessner.net */ +/* WWW : http://www.kirchgessner.net */ +/******************************************************************************/ +/* #BEG-HDR */ +/* */ +/* Package : FITS reading/writing library */ +/* Modul-Name : fitsrw.c */ +/* Description : Support of reading/writing FITS-files */ +/* Function(s) : fits_new_filestruct - (local) initialize file structure*/ +/* fits_new_hdulist - (local) initialize hdulist struct*/ +/* fits_delete_filestruct - (local) delete file structure */ +/* fits_delete_recordlist - (local) delete record list */ +/* fits_delete_hdulist - (local) delete hdu list */ +/* fits_nan_32 - (local) check IEEE NaN values */ +/* fits_nan_64 - (local) check IEEE NaN values */ +/* fits_get_error - get error message */ +/* fits_set_error - (local) set error message */ +/* fits_drop_error - (local) remove an error message */ +/* fits_open - open a FITS file */ +/* fits_close - close a FITS file */ +/* fits_add_hdu - add a HDU to a FITS file */ +/* fits_add_card - add a card to the HDU */ +/* fits_print_header - print a single FITS header */ +/* fits_read_header - (local) read in FITS header */ +/* fits_write_header - write a FITS header */ +/* fits_decode_header - (local) decode a header */ +/* fits_eval_pixrange - (local) evaluate range of pixels */ +/* fits_decode_card - decode a card */ +/* fits_search_card - search a card in a record list */ +/* fits_image_info - get information about image */ +/* fits_seek_image - position to an image */ +/* fits_read_pixel - read pixel values from file */ +/* fits_to_pgmraw - convert FITS-file to PGM-file */ +/* pgmraw_to_fits - convert PGM-file to FITS-file */ +/* */ +/* Author : P. Kirchgessner */ +/* Date of Gen. : 12-Apr-97 */ +/* Last modified : 25-Aug-06 */ +/* Version : 0.12 */ +/* Compiler Opt. : */ +/* Changes : */ +/* #MOD-0001, nn, 20-Dec-97, Initialize some variables */ +/* #MOD-0002, pk, 16-Aug-06, Fix problems with internationalization */ +/* */ +/* #END-HDR */ +/******************************************************************************/ +/* References: */ +/* - NOST, Definition of the Flexible Image Transport System (FITS), */ +/* September 29, 1995, Standard, NOST 100-1.1 */ +/* (ftp://nssdc.gsfc.nasa.gov/pub/fits/fits_standard_ps.Z) */ +/* - The FITS IMAGE Extension. A Proposal. J.D. Ponz, R.W. Thompson, */ +/* J.R. Munoz, Feb. 7, 1992 */ +/* (ftp://www.cv.nrao.edu/fits/documents/standards/image.ps.gz) */ +/* */ +/******************************************************************************/ + +#define VERSIO 0.12 + +/******************************************************************************/ +/* FITS reading/writing library */ +/* Copyright (C) 1997 Peter Kirchgessner */ +/* (email: peter@kirchgessner.net, WWW: http://www.kirchgessner.net) */ +/* The library was developed for a FITS-plug-in to GIMP, the GNU Image */ +/* Manipulation Program. But it is completely independent to that (beside use */ +/* of glib). If someone finds it useful for other purposes, try to keep it */ +/* independent from your application. */ +/******************************************************************************/ +/* */ +/* This program is free software: you can redistribute it and/or modify */ +/* it under the terms of the GNU General Public License as published by */ +/* the Free Software Foundation; either version 3 of the License, or */ +/* (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program. If not, see <https://www.gnu.org/licenses/>. */ +/******************************************************************************/ + +#include "config.h" + +#include <stdlib.h> +#include <string.h> +#include <errno.h> + +#include <glib.h> +#include <glib/gstdio.h> + +#include "fits-io.h" + + +/* Declaration of local functions */ + +static FitsFile * fits_new_filestruct (void); +static FitsHduList * fits_new_hdulist (void); +static void fits_delete_filestruct (FitsFile *ff); +static void fits_delete_recordlist (FitsRecordList *rl); +static void fits_delete_hdulist (FitsHduList *hl); +static gint fits_nan_32 (guchar *value); +static gint fits_nan_64 (guchar *value); +static void fits_set_error (const char *errmsg); +static void fits_drop_error (void); +static FitsRecordList * fits_read_header (FILE *fp, + gint *nrec); +static FitsHduList * fits_decode_header (FitsRecordList *hdr, + glong hdr_offset, + glong dat_offset); +static gint fits_eval_pixrange (FILE *fp, + FitsHduList *hdu); + + +/* Error handling like a FIFO */ +#define FITS_MAX_ERROR 16 +#define FITS_ERROR_LENGTH 256 + +static gint fits_n_error = 0; +static gchar fits_error[FITS_MAX_ERROR][FITS_ERROR_LENGTH]; + +/* What byte ordering for IEEE-format we are running on ? */ +static gint fits_ieee32_intel = 0; +static gint fits_ieee32_motorola = 0; +static gint fits_ieee64_intel = 0; +static gint fits_ieee64_motorola = 0; + +/* Macros */ +#define FITS_RETURN(msg, val) { fits_set_error (msg); return (val); } +#define FITS_VRETURN(msg) { fits_set_error (msg); return; } + +/* Get pixel values from memory. p must be an (guchar *) */ +#define FITS_GETBITPIX16(p,val) val = ((p[0] << 8) | (p[1])) +#define FITS_GETBITPIX32(p,val) val = \ + ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]) + +/* Get floating point values from memory. p must be an (guchar *). */ +/* The floating point values must directly correspond */ +/* to machine representation. Otherwise it does not work. */ +#define FITS_GETBITPIXM32(p,val) \ + { if (fits_ieee32_intel) {guchar uc[4]; \ + uc[0] = p[3]; uc[1] = p[2]; uc[2] = p[1]; uc[3] = p[0]; \ + val = *(FitsBitpixM32 *)uc; } \ + else if (fits_ieee32_motorola) { val = *(FitsBitpixM32 *)p; } \ + else if (fits_ieee64_motorola) {FitsBitpixM64 m64; \ + guchar *uc= (guchar *)&m64; \ + uc[0]=p[0]; uc[1]=p[1]; uc[2]=p[2]; uc[3]=p[3]; uc[4]=uc[5]=uc[6]=uc[7]=0; \ + val = (FitsBitpixM32)m64; } \ + else if (fits_ieee64_intel) {FitsBitpixM64 i64; \ + guchar *uc= (guchar *)&i64; \ + uc[0]=uc[1]=uc[2]=uc[3]=0; uc[7]=p[0]; uc[6]=p[1]; uc[5]=p[2]; uc[4]=p[3]; \ + val = (FitsBitpixM32)i64;} } + +#define FITS_GETBITPIXM64(p,val) \ + { if (fits_ieee64_intel) {guchar uc[8]; \ + uc[0] = p[7]; uc[1] = p[6]; uc[2] = p[5]; uc[3] = p[4]; \ + uc[4] = p[3]; uc[5] = p[2]; uc[6] = p[1]; uc[7] = p[0]; \ + val = *(FitsBitpixM64 *)uc; } else val = *(FitsBitpixM64 *)p; } + +#define FITS_WRITE_BOOLCARD(fp,key,value) \ +{ gchar card[81]; \ + g_snprintf (card, sizeof (card), \ + "%-8.8s= %20s%50s", key, value ? "T" : "F", " "); \ + fwrite (card, 1, 80, fp); } + +#define FITS_WRITE_LONGCARD(fp,key,value) \ +{ gchar card[81]; \ + g_snprintf (card, sizeof (card), \ + "%-8.8s= %20ld%50s", key, (long)value, " "); \ + fwrite (card, 1, 80, fp); } + +#define FITS_WRITE_DOUBLECARD(fp,key,value) \ +{ gchar card[81], dbl[21], *istr; \ + g_ascii_dtostr (dbl, sizeof(dbl), (gdouble)value); \ + istr = strstr (dbl, "e"); \ + if (istr) *istr = 'E'; \ + g_snprintf (card, sizeof (card), \ + "%-8.8s= %20.20s%50s", key, dbl, " "); \ + fwrite (card, 1, 80, fp); } + +#define FITS_WRITE_STRINGCARD(fp,key,value) \ +{ gchar card[81]; int k;\ + g_snprintf (card, sizeof (card), \ + "%-8.8s= \'%s", key, value); \ + for (k = strlen (card); k < 81; k++) card[k] = ' '; \ + k = strlen (key); if (k < 8) card[19] = '\''; else card[11+k] = '\''; \ + fwrite (card, 1, 80, fp); } + +#define FITS_WRITE_CARD(fp,value) \ +{ gchar card[81]; \ + g_snprintf (card, sizeof (card), \ + "%-80.80s", value); \ + fwrite (card, 1, 80, fp); } + + +/* Macro to convert a double value to a string using '.' as decimal point */ +#define FDTOSTR(buf,val) g_ascii_dtostr (buf, sizeof(buf), (gdouble)(val)) + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_scanfdouble - (local) scan a string for a double value */ +/* */ +/* Parameters: */ +/* const char *buf [I] : the string to scan */ +/* double *value [O] : where to write the double value to */ +/* */ +/* Scan a string for a double value represented in "C" locale. */ +/* On success 1 is returned. On failure 0 is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static gboolean +fits_scanfdouble (const gchar *buf, + gdouble *value) +{ + gboolean retval = FALSE; + gchar *bufcopy = g_strdup (buf); + + /* We should use g_ascii_strtod. This also allows scanning of hexadecimal */ + /* values like 0x02. But we want the behaviour of sscanf ("0x02","%lf",...*/ + /* that gives 0.0 in this case. So check the string if we have a hex-value*/ + + if (bufcopy) + { + gchar *bufptr = bufcopy; + + /* Remove leading white space */ + g_strchug (bufcopy); + + /* Skip leading sign character */ + if ((*bufptr == '-') || (*bufptr == '+')) + bufptr++; + + /* Start of hex value ? Take this as 0.0 */ + if ((bufptr[0] == '0') && (g_ascii_toupper (bufptr[1]) == 'X')) + { + *value = 0.0; + retval = TRUE; + } + else + { + if (*bufptr == '.') /* leading decimal point ? Skip it */ + bufptr++; + + if (g_ascii_isdigit (*bufptr)) /* Expect the complete string is decimal */ + { + gchar *endptr; + gdouble gvalue = g_ascii_strtod (bufcopy, &endptr); + + if (errno == 0) + { + *value = gvalue; + retval = TRUE; + } + } + } + + g_free (bufcopy); + } + + return retval; +} + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_new_filestruct - (local) initialize file structure */ +/* */ +/* Parameters: */ +/* -none- */ +/* */ +/* Returns a pointer to an initialized fits file structure. */ +/* On failure, a NULL-pointer is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static FitsFile * +fits_new_filestruct (void) +{ + return g_new0 (FitsFile, 1); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_new_hdulist - (local) initialize hdulist structure */ +/* */ +/* Parameters: */ +/* -none- */ +/* */ +/* Returns a pointer to an initialized hdulist structure. */ +/* On failure, a NULL-pointer is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static FitsHduList * +fits_new_hdulist (void) +{ + return g_new0 (FitsHduList, 1); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_delete_filestruct - (local) delete file structure */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : pointer to fits file structure */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* Frees all memory allocated by the file structure. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static void +fits_delete_filestruct (FitsFile *ff) +{ + if (ff == NULL) + return; + + fits_delete_hdulist (ff->hdu_list); + ff->hdu_list = NULL; + + g_free (ff); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_delete_recordlist - (local) delete record list */ +/* */ +/* Parameters: */ +/* FitsRecordList *rl [I] : record list to delete */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static void +fits_delete_recordlist (FitsRecordList *rl) +{ + while (rl != NULL) + { + FitsRecordList *next; + + next = rl->next_record; + rl->next_record = NULL; + g_free (rl); + + rl = next; + } +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_delete_hdulist - (local) delete hdu list */ +/* */ +/* Parameters: */ +/* FitsHduList *hl [I] : hdu list to delete */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static void +fits_delete_hdulist (FitsHduList *hl) +{ + while (hl != NULL) + { + FitsHduList *next; + + fits_delete_recordlist (hl->header_record_list); + next = hl->next_hdu; + hl->next_hdu = NULL; + g_free (hl); + + hl = next; + } +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_nan_32 - (local) check for IEEE NaN values (32 bit) */ +/* */ +/* Parameters: */ +/* unsigned char *v [I] : value to check */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function returns 1 if the value is a NaN. Otherwise 0 is returned. */ +/* The byte sequence at v must start with the sign/eponent byte. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static int +fits_nan_32 (guchar *v) +{ + register gulong k; + + k = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | v[3]; + k &= 0x7fffffff; /* Don't care about the sign bit */ + + /* See NOST Definition of the Flexible Image Transport System (FITS), */ + /* Appendix F, IEEE special formats. */ + return (((k >= 0x7f7fffff) && (k <= 0x7fffffff)) || + ((k >= 0x00000001) && (k <= 0x00800000))); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_nan_64 - (local) check for IEEE NaN values (64 bit) */ +/* */ +/* Parameters: */ +/* unsigned char *v [I] : value to check */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function returns 1 if the value is a NaN. Otherwise 0 is returned. */ +/* The byte sequence at v must start with the sign/eponent byte. */ +/* (currently we ignore the low order 4 bytes of the mantissa. Therefore */ +/* this function is the same as for 32 bits). */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static int +fits_nan_64 (guchar *v) +{ + register gulong k; + + k = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | v[3]; + k &= 0x7fffffff; /* Don't care about the sign bit */ + + /* See NOST Definition of the Flexible Image Transport System (FITS), */ + /* Appendix F, IEEE special formats. */ + return (((k >= 0x7f7fffff) && (k <= 0x7fffffff)) || + ((k >= 0x00000001) && (k <= 0x00800000))); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_get_error - get an error message */ +/* */ +/* Parameters: */ +/* -none- */ +/* */ +/* If an error message has been set, a pointer to the message is returned. */ +/* Otherwise a NULL pointer is returned. */ +/* An inquired error message is removed from the error FIFO. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gchar * +fits_get_error (void) +{ + static gchar errmsg[FITS_ERROR_LENGTH]; + gint k; + + if (fits_n_error <= 0) + return NULL; + + strcpy (errmsg, fits_error[0]); + + for (k = 1; k < fits_n_error; k++) + strcpy (fits_error[k-1], fits_error[k]); + + fits_n_error--; + + return errmsg; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_set_error - (local) set an error message */ +/* */ +/* Parameters: */ +/* char *errmsg [I] : Error message to set */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* Places the error message in the FIFO. If the FIFO is full, */ +/* the message is discarded. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static void +fits_set_error (const gchar *errmsg) +{ + if (fits_n_error < FITS_MAX_ERROR) + { + strncpy (fits_error[fits_n_error], errmsg, FITS_ERROR_LENGTH); + fits_error[fits_n_error++][FITS_ERROR_LENGTH-1] = '\0'; + } +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_drop_error - (local) remove an error message */ +/* */ +/* Parameters: */ +/* -none- */ +/* */ +/* Removes the last error message from the error message FIFO */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static void +fits_drop_error (void) +{ + if (fits_n_error > 0) + fits_n_error--; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_open - open a FITS file */ +/* */ +/* Parameters: */ +/* char *filename [I] : name of file to open */ +/* char *openmode [I] : mode to open the file ("r", "w") */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* On success, a FitsFile-pointer is returned. On failure, a NULL- */ +/* pointer is returned. */ +/* The functions scans through the file loading each header and analyzing */ +/* them. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +FitsFile * +fits_open (const gchar *filename, + const gchar *openmode) + +{ + gint reading, writing, n_rec, n_hdr; + glong fpos_header, fpos_data; + FILE *fp; + FitsFile *ff; + FitsRecordList *hdrlist; + FitsHduList *hdulist = NULL; + FitsHduList *last_hdulist = NULL; + + /* Check the IEEE-format we are running on */ + { + gfloat one32 = 1.0; + gdouble one64 = 1.0; + guchar *op32 = (guchar *) &one32; + guchar *op64 = (guchar *) &one64; + + if (sizeof (float) == 4) + { + fits_ieee32_intel = (op32[3] == 0x3f); + fits_ieee32_motorola = (op32[0] == 0x3f); + } + + if (sizeof (double) == 8) + { + fits_ieee64_intel = (op64[7] == 0x3f); + fits_ieee64_motorola = (op64[0] == 0x3f); + } + } + + if ((filename == NULL) || (*filename == '\0') || (openmode == NULL)) + FITS_RETURN ("fits_open: Invalid parameters", NULL); + + reading = (strcmp (openmode, "r") == 0); + writing = (strcmp (openmode, "w") == 0); + if ((!reading) && (!writing)) + FITS_RETURN ("fits_open: Invalid openmode", NULL); + + fp = g_fopen (filename, reading ? "rb" : "wb"); + if (fp == NULL) + FITS_RETURN ("fits_open: fopen() failed", NULL); + + ff = fits_new_filestruct (); + if (ff == NULL) + { + fclose (fp); + FITS_RETURN ("fits_open: No more memory", NULL); + } + + ff->fp = fp; + ff->openmode = *openmode; + + if (writing) + return ff; + + for (n_hdr = 0; ; n_hdr++) /* Read through all HDUs */ + { + fpos_header = ftell (fp); /* Save file position of header */ + hdrlist = fits_read_header (fp, &n_rec); + + if (hdrlist == NULL) + { + if (n_hdr > 0) /* At least one header must be present. */ + fits_drop_error (); /* If we got a header already, drop the error */ + break; + } + fpos_data = ftell (fp); /* Save file position of data */ + + /* Decode the header */ + hdulist = fits_decode_header (hdrlist, fpos_header, fpos_data); + if (hdulist == NULL) + { + fits_delete_recordlist (hdrlist); + break; + } + ff->n_hdu++; + ff->n_pic += hdulist->numpic; + + if (hdulist->used.blank_value) + ff->blank_used = TRUE; + + if (hdulist->used.nan_value) + ff->nan_used = TRUE; + + if (n_hdr == 0) + ff->hdu_list = hdulist; + else + last_hdulist->next_hdu = hdulist; + + last_hdulist = hdulist; + + /* Evaluate the range of pixel data */ + fits_eval_pixrange (fp, hdulist); + + /* Reposition to start of next header */ + if (fseek (fp, hdulist->data_offset + hdulist->data_size, SEEK_SET) < 0) + break; + } + + return ff; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_close - close a FITS file */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : FITS file pointer */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +void +fits_close (FitsFile *ff) +{ + if (ff == NULL) + FITS_VRETURN ("fits_close: Invalid parameter"); + + fclose (ff->fp); + + fits_delete_filestruct (ff); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_add_hdu - add a HDU to the file */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : FITS file pointer */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* Adds a new HDU to the list kept in ff. A pointer to the new HDU is */ +/* returned. On failure, a NULL-pointer is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +FitsHduList * +fits_add_hdu (FitsFile *ff) +{ + FitsHduList *newhdu, *hdu; + + if (ff->openmode != 'w') + FITS_RETURN ("fits_add_hdu: file not open for writing", NULL); + + newhdu = fits_new_hdulist (); + if (newhdu == NULL) + return NULL; + + if (ff->hdu_list == NULL) + { + ff->hdu_list = newhdu; + } + else + { + hdu = ff->hdu_list; + while (hdu->next_hdu != NULL) + hdu = hdu->next_hdu; + hdu->next_hdu = newhdu; + } + + return newhdu; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_add_card - add a card to the HDU */ +/* */ +/* Parameters: */ +/* FitsHduList *hdulist [I] : HDU listr */ +/* char *card [I] : card to add */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The card must follow the standards of FITS. The card must not use a */ +/* keyword that is written using *hdulist itself. On success 0 is returned. */ +/* On failure -1 is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gint +fits_add_card (FitsHduList *hdulist, + const gchar *card) +{ + gint k; + + if (hdulist->naddcards >= FITS_NADD_CARDS) + return -1; + + k = strlen (card); + if (k < FITS_CARD_SIZE) + { + memset (&(hdulist->addcards[hdulist->naddcards][k]), ' ', + FITS_CARD_SIZE - k); + memcpy (hdulist->addcards[(hdulist->naddcards)++], card, k); + } + else + { + memcpy (hdulist->addcards[(hdulist->naddcards)++], card, FITS_CARD_SIZE); + } + + return 0; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_print_header - print the internal representation */ +/* of a single header */ +/* Parameters: */ +/* FitsHduList *hdr [I] : pointer to the header */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +void +fits_print_header (FitsHduList *hdr) +{ + gint k; + gchar buf[G_ASCII_DTOSTR_BUF_SIZE]; + + if (hdr->used.simple) + printf ("Content of SIMPLE-header:\n"); + else + printf ("Content of XTENSION-header %s:\n", hdr->xtension); + + printf ("header_offset : %ld\n", hdr->header_offset); + printf ("data_offset : %ld\n", hdr->data_offset); + printf ("data_size : %ld\n", hdr->data_size); + printf ("used data_size: %ld\n", hdr->udata_size); + printf ("bytes p.pixel : %d\n", hdr->bpp); + printf ("pixmin : %s\n", FDTOSTR (buf, hdr->pixmin)); + printf ("pixmax : %s\n", FDTOSTR (buf, hdr->pixmax)); + + printf ("naxis : %d\n", hdr->naxis); + for (k = 1; k <= hdr->naxis; k++) + printf ("naxis%-3d : %d\n", k, hdr->naxisn[k-1]); + + printf ("bitpix : %d\n", hdr->bitpix); + + if (hdr->used.blank) + printf ("blank : %ld\n", hdr->blank); + else + printf ("blank : not used\n"); + + if (hdr->used.datamin) + printf ("datamin : %s\n", FDTOSTR (buf, hdr->datamin)); + else + printf ("datamin : not used\n"); + + if (hdr->used.datamax) + printf ("datamax : %s\n", FDTOSTR (buf, hdr->datamax)); + else + printf ("datamax : not used\n"); + + if (hdr->used.gcount) + printf ("gcount : %ld\n", hdr->gcount); + else + printf ("gcount : not used\n"); + + if (hdr->used.pcount) + printf ("pcount : %ld\n", hdr->pcount); + else + printf ("pcount : not used\n"); + + if (hdr->used.bscale) + printf ("bscale : %s\n", FDTOSTR (buf, hdr->bscale)); + else + printf ("bscale : not used\n"); + + if (hdr->used.bzero) + printf ("bzero : %s\n", FDTOSTR (buf, hdr->bzero)); + else + printf ("bzero : not used\n"); +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_read_header - (local) read FITS header */ +/* */ +/* Parameters: */ +/* FILE *fp [I] : file pointer */ +/* int *nrec [O] : number of records read */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* Reads in all header records up to the record that keeps the END-card. */ +/* A pointer to the record list is returned on success. */ +/* On failure, a NULL-pointer is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static FitsRecordList * +fits_read_header (FILE *fp, + gint *nrec) +{ + gchar record[FITS_RECORD_SIZE]; + FitsRecordList *start_list = NULL; + FitsRecordList *cu_record = NULL; + FitsRecordList *new_record; + FitsData *fdat; + gint k, simple, xtension; + + *nrec = 0; + + k = fread (record, 1, FITS_RECORD_SIZE, fp); + if (k != FITS_RECORD_SIZE) + FITS_RETURN ("fits_read_header: Error in read of first record", NULL); + + simple = (strncmp (record, "SIMPLE ", 8) == 0); + xtension = (strncmp (record, "XTENSION", 8) == 0); + if ((!simple) && (!xtension)) + FITS_RETURN ("fits_read_header: Missing keyword SIMPLE or XTENSION", NULL); + + if (simple) + { + fdat = fits_decode_card (record, FITS_DATA_TYPE_FBOOL); + if (fdat && !fdat->fbool) + fits_set_error ("fits_read_header (warning): keyword SIMPLE does not " + "have value T"); + } + + for (;;) /* Process all header records */ + { + new_record = g_new0 (FitsRecordList, 1); + memcpy (new_record->data, record, FITS_RECORD_SIZE); + new_record->next_record = NULL; + (*nrec)++; + + if (start_list == NULL) /* Add new record to the list */ + start_list = new_record; + else + cu_record->next_record = new_record; + + cu_record = new_record; + + /* Was this the last record ? */ + if (fits_search_card (cu_record, "END") != NULL) + break; + + k = fread (record, 1, FITS_RECORD_SIZE, fp); + if (k != FITS_RECORD_SIZE) + FITS_RETURN ("fits_read_header: Error in read of record", NULL); + } + + return start_list; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_write_header - write a FITS header */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : FITS-file pointer */ +/* FitsHduList [I] : pointer to header */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* Writes a header to the file. On success, 0 is returned. On failure, */ +/* -1 is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gint +fits_write_header (FitsFile *ff, + FitsHduList *hdulist) +{ + gint numcards; + gint k; + + if (ff->openmode != 'w') + FITS_RETURN ("fits_write_header: file not open for writing", -1); + + numcards = 0; + + if (hdulist->used.simple) + { + FITS_WRITE_BOOLCARD (ff->fp, "SIMPLE", 1); + numcards++; + } + else if (hdulist->used.xtension) + { + FITS_WRITE_STRINGCARD (ff->fp, "XTENSION", hdulist->xtension); + numcards++; + } + + FITS_WRITE_LONGCARD (ff->fp, "BITPIX", hdulist->bitpix); + numcards++; + + FITS_WRITE_LONGCARD (ff->fp, "NAXIS", hdulist->naxis); + numcards++; + + for (k = 0; k < hdulist->naxis; k++) + { + gchar naxisn[16]; + + g_snprintf (naxisn, sizeof (naxisn), "NAXIS%d", k+1); + FITS_WRITE_LONGCARD (ff->fp, naxisn, hdulist->naxisn[k]); + numcards++; + } + + if (hdulist->used.extend) + { + FITS_WRITE_BOOLCARD (ff->fp, "EXTEND", hdulist->extend); + numcards++; + } + + if (hdulist->used.groups) + { + FITS_WRITE_BOOLCARD (ff->fp, "GROUPS", hdulist->groups); + numcards++; + } + + if (hdulist->used.pcount) + { + FITS_WRITE_LONGCARD (ff->fp, "PCOUNT", hdulist->pcount); + numcards++; + } + + if (hdulist->used.gcount) + { + FITS_WRITE_LONGCARD (ff->fp, "GCOUNT", hdulist->gcount); + numcards++; + } + + if (hdulist->used.bzero) + { + FITS_WRITE_DOUBLECARD (ff->fp, "BZERO", hdulist->bzero); + numcards++; + } + + if (hdulist->used.bscale) + { + FITS_WRITE_DOUBLECARD (ff->fp, "BSCALE", hdulist->bscale); + numcards++; + } + + if (hdulist->used.datamin) + { + FITS_WRITE_DOUBLECARD (ff->fp, "DATAMIN", hdulist->datamin); + numcards++; + } + + if (hdulist->used.datamax) + { + FITS_WRITE_DOUBLECARD (ff->fp, "DATAMAX", hdulist->datamax); + numcards++; + } + + if (hdulist->used.blank) + { + FITS_WRITE_LONGCARD (ff->fp, "BLANK", hdulist->blank); + numcards++; + } + + /* Write additional cards */ + if (hdulist->naddcards > 0) + { + fwrite (hdulist->addcards, FITS_CARD_SIZE, hdulist->naddcards, ff->fp); + numcards += hdulist->naddcards; + } + + FITS_WRITE_CARD (ff->fp, "END"); + numcards++; + + k = (numcards * FITS_CARD_SIZE) % FITS_RECORD_SIZE; + if (k) /* Must the record be filled up ? */ + { + while (k++ < FITS_RECORD_SIZE) + putc (' ', ff->fp); + } + + return ferror (ff->fp) ? -1 : 0; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_decode_header - (local) decode a header */ +/* */ +/* Parameters: */ +/* FitsRecordList *hdr [I] : the header record list */ +/* long hdr_offset [I] : fileposition of header */ +/* long dat_offset [I] : fileposition of data (end of header) */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function decodes the mostly used data within the header and generates */ +/* a FitsHduList-entry. On failure, a NULL-pointer is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static FitsHduList * +fits_decode_header (FitsRecordList *hdr, + glong hdr_offset, + glong dat_offset) +{ + FitsHduList *hdulist; + FitsData *fdat; + gchar errmsg[80], key[9]; + gint k, bpp, random_groups; + glong mul_axis, data_size, bitpix_supported; + +#define FITS_DECODE_CARD(mhdr,mkey,mfdat,mtyp) \ + { strcpy (key, mkey); \ + mfdat = fits_decode_card (fits_search_card (mhdr, mkey), mtyp); \ + if (mfdat == NULL) goto err_missing; } + +#define FITS_TRY_CARD(mhdr,mhdu,mkey,mvar,mtyp,unionvar) \ + { FitsData *mfdat = fits_decode_card (fits_search_card (mhdr,mkey), mtyp); \ + mhdu->used.mvar = (mfdat != NULL); \ + if (mhdu->used.mvar) mhdu->mvar = mfdat->unionvar; } + + hdulist = fits_new_hdulist (); + if (hdulist == NULL) + FITS_RETURN ("fits_decode_header: Not enough memory", NULL); + + /* Initialize the header data */ + hdulist->header_offset = hdr_offset; + hdulist->data_offset = dat_offset; + + hdulist->used.simple = (strncmp (hdr->data, "SIMPLE ", 8) == 0); + hdulist->used.xtension = (strncmp (hdr->data, "XTENSION", 8) == 0); + + if (hdulist->used.xtension) + { + fdat = fits_decode_card (fits_search_card (hdr, "XTENSION"), + FITS_DATA_TYPE_FSTRING); + if (fdat != NULL) + { + strcpy (hdulist->xtension, fdat->fstring); + } + else + { + strcpy (errmsg, "No valid XTENSION header found."); + goto err_return; + } + } + + FITS_DECODE_CARD (hdr, "NAXIS", fdat, FITS_DATA_TYPE_FLONG); + hdulist->naxis = fdat->flong; + + FITS_DECODE_CARD (hdr, "BITPIX", fdat, FITS_DATA_TYPE_FLONG); + bpp = hdulist->bitpix = (gint) fdat->flong; + if ((bpp != 8) && (bpp != 16) && (bpp != 32) && + (bpp != -32) && (bpp != -64)) + { + strcpy (errmsg, "fits_decode_header: Invalid BITPIX-value"); + goto err_return; + } + + if (bpp < 0) + bpp = -bpp; + + bpp /= 8; + hdulist->bpp = bpp; + + FITS_TRY_CARD (hdr, hdulist, "GCOUNT", gcount, FITS_DATA_TYPE_FLONG, flong); + FITS_TRY_CARD (hdr, hdulist, "PCOUNT", pcount, FITS_DATA_TYPE_FLONG, flong); + + FITS_TRY_CARD (hdr, hdulist, "GROUPS", groups, FITS_DATA_TYPE_FLONG, fbool); + random_groups = hdulist->used.groups && hdulist->groups; + + FITS_TRY_CARD (hdr, hdulist, "EXTEND", extend, FITS_DATA_TYPE_FBOOL, fbool); + + if (hdulist->used.xtension) /* Extension requires GCOUNT and PCOUNT */ + { + if (! hdulist->used.gcount || ! hdulist->used.pcount) + { + strcpy (errmsg, "fits_decode_header: Missing GCOUNT/PCOUNT for XTENSION"); + goto err_return; + } + } + + mul_axis = 1; + + /* Find all NAXISx-cards */ + for (k = 1; k <= FITS_MAX_AXIS; k++) + { + gchar naxisn[16]; + + g_snprintf (naxisn, sizeof (naxisn), "NAXIS%-3d", k); + fdat = fits_decode_card (fits_search_card (hdr, naxisn), + FITS_DATA_TYPE_FLONG); + if (fdat == NULL) + { + k--; /* Save the last NAXISk read */ + break; + } + + hdulist->naxisn[k-1] = (int)fdat->flong; + + if (hdulist->naxisn[k-1] < 0) + { + strcpy (errmsg, "fits_decode_header: Negative value in NAXISn"); + goto err_return; + } + + if ((k == 1) && random_groups) + { + if (hdulist->naxisn[0] != 0) + { + strcpy (errmsg, "fits_decode_header: Random groups with NAXIS1 != 0"); + goto err_return; + } + } + else + { + mul_axis *= hdulist->naxisn[k - 1]; + } + } + + if ((hdulist->naxis > 0) && (k < hdulist->naxis)) + { + strcpy (errmsg, "fits_decode_card: Not enough NAXISn-cards"); + goto err_return; + } + + /* If we have only one dimension, just set the second to size one. */ + /* So we don't have to check for naxis < 2 in some places. */ + if (hdulist->naxis < 2) + hdulist->naxisn[1] = 1; + + if (hdulist->naxis < 1) + { + mul_axis = 0; + hdulist->naxisn[0] = 1; + } + + if (hdulist->used.xtension) + data_size = bpp * hdulist->gcount * (hdulist->pcount + mul_axis); + else + data_size = bpp * mul_axis; + + hdulist->udata_size = data_size; /* Used data size without padding */ + + /* Datasize must be a multiple of the FITS logical record size */ + data_size = (data_size + FITS_RECORD_SIZE - 1) / FITS_RECORD_SIZE; + data_size *= FITS_RECORD_SIZE; + hdulist->data_size = data_size; + + FITS_TRY_CARD (hdr, hdulist, "BLANK", blank, FITS_DATA_TYPE_FLONG, flong); + + FITS_TRY_CARD (hdr, hdulist, "DATAMIN", datamin, FITS_DATA_TYPE_FDOUBLE, fdouble); + FITS_TRY_CARD (hdr, hdulist, "DATAMAX", datamax, FITS_DATA_TYPE_FDOUBLE, fdouble); + + FITS_TRY_CARD (hdr, hdulist, "BZERO", bzero, FITS_DATA_TYPE_FDOUBLE, fdouble); + FITS_TRY_CARD (hdr, hdulist, "BSCALE", bscale, FITS_DATA_TYPE_FDOUBLE, fdouble); + + /* Evaluate number of interpretable images for this HDU */ + hdulist->numpic = 0; + + /* We must support this format */ + bitpix_supported = (hdulist->bitpix > 0) + || ( (hdulist->bitpix == -64) + && (fits_ieee64_intel || fits_ieee64_motorola)) + || ( (hdulist->bitpix == -32) + && ( fits_ieee32_intel || fits_ieee32_motorola + || fits_ieee64_intel || fits_ieee64_motorola)); + + if (bitpix_supported) + { + if (hdulist->used.simple) + { + if (hdulist->naxis > 0) + { + hdulist->numpic = 1; + for (k = 3; k <= hdulist->naxis; k++) + hdulist->numpic *= hdulist->naxisn[k - 1]; + } + } + else if (hdulist->used.xtension && + (strncmp (hdulist->xtension, "IMAGE", 5) == 0)) + { + if (hdulist->naxis > 0) + { + hdulist->numpic = 1; + for (k = 3; k <= hdulist->naxis; k++) + hdulist->numpic *= hdulist->naxisn[k - 1]; + } + } + } + else + { + gchar msg[160]; + + g_snprintf (msg, sizeof (msg), + "fits_decode_header: IEEE floating point format required for " + "BITPIX=%d\nis not supported on this machine", + hdulist->bitpix); + fits_set_error (msg); + } + + hdulist->header_record_list = hdr; /* Add header records to the list */ + + return hdulist; + + err_missing: + g_snprintf (errmsg, sizeof (errmsg), + "fits_decode_header: missing/invalid %s card", key); + + err_return: + fits_delete_hdulist (hdulist); + fits_set_error (errmsg); + + return NULL; + +#undef FITS_DECODE_CARD +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_eval_pixrange - (local) evaluate range of pixel data */ +/* */ +/* Parameters: */ +/* FILE *fp [I] : file pointer */ +/* FitsHduList *hdu [I] : pointer to header */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The Function sets the values hdu->pixmin and hdu->pixmax. On success 0 */ +/* is returned. On failure, -1 is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +static gint +fits_eval_pixrange (FILE *fp, + FitsHduList *hdu) +{ + register gint maxelem; +#define FITSNPIX 4096 + guchar pixdat[FITSNPIX]; + gint nelem, bpp; + gboolean blank_found = FALSE; + gboolean nan_found = FALSE; + + if (fseek (fp, hdu->data_offset, SEEK_SET) < 0) + FITS_RETURN ("fits_eval_pixrange: can't position file", -1); + + bpp = hdu->bpp; /* Number of bytes per pixel */ + nelem = hdu->udata_size / bpp; /* Number of data elements */ + + switch (hdu->bitpix) + { + case 8: + { + register FitsBitpix8 pixval; + register guchar *ptr; + FitsBitpix8 minval = 255; + FitsBitpix8 maxval = 0; + + while (nelem > 0) + { + maxelem = sizeof (pixdat) / bpp; + if (nelem < maxelem) + maxelem = nelem; + + nelem -= maxelem; + if (fread ((gchar *) pixdat, bpp, maxelem, fp) != maxelem) + FITS_RETURN ("fits_eval_pixrange: error on read bitpix 8 data", -1); + + ptr = pixdat; + if (hdu->used.blank) + { + FitsBitpix8 blankval = (FitsBitpix8) hdu->blank; + + while (maxelem-- > 0) + { + pixval = (FitsBitpix8)*(ptr++); + + if (pixval != blankval) + { + if (pixval < minval) + minval = pixval; + else if (pixval > maxval) + maxval = pixval; + } + else + { + blank_found = TRUE; + } + } + } + else + { + while (maxelem-- > 0) + { + pixval = (FitsBitpix8)*(ptr++); + + if (pixval < minval) + minval = pixval; + else if (pixval > maxval) + maxval = pixval; + } + } + } + + hdu->pixmin = minval; + hdu->pixmax = maxval; + break; + } + + case 16: + { + register FitsBitpix16 pixval; + register guchar *ptr; + FitsBitpix16 minval = 0x7fff; + FitsBitpix16 maxval = ~0x7fff; + + while (nelem > 0) + { + maxelem = sizeof (pixdat) / bpp; + if (nelem < maxelem) + maxelem = nelem; + + nelem -= maxelem; + if (fread ((gchar *) pixdat, bpp, maxelem, fp) != maxelem) + FITS_RETURN ("fits_eval_pixrange: error on read bitpix 16 data", -1); + + ptr = pixdat; + if (hdu->used.blank) + { + FitsBitpix16 blankval = (FitsBitpix16) hdu->blank; + + while (maxelem-- > 0) + { + FITS_GETBITPIX16 (ptr, pixval); + ptr += 2; + + if (pixval != blankval) + { + if (pixval < minval) + minval = pixval; + else if (pixval > maxval) + maxval = pixval; + } + else + { + blank_found = TRUE; + } + } + } + else + { + while (maxelem-- > 0) + { + FITS_GETBITPIX16 (ptr, pixval); + ptr += 2; + + if (pixval < minval) + minval = pixval; + else if (pixval > maxval) + maxval = pixval; + } + } + } + + hdu->pixmin = minval; + hdu->pixmax = maxval; + break; + } + + case 32: + { + register FitsBitpix32 pixval; + register guchar *ptr; + FitsBitpix32 minval = 0x7fffffff; + FitsBitpix32 maxval = ~0x7fffffff; + + while (nelem > 0) + { + maxelem = sizeof (pixdat)/bpp; + if (nelem < maxelem) + maxelem = nelem; + + nelem -= maxelem; + if (fread ((gchar *) pixdat, bpp, maxelem, fp) != maxelem) + FITS_RETURN ("fits_eval_pixrange: error on read bitpix 32 data", -1); + + ptr = pixdat; + if (hdu->used.blank) + { + FitsBitpix32 blankval = (FitsBitpix32)hdu->blank; + + while (maxelem-- > 0) + { + FITS_GETBITPIX32 (ptr, pixval); + ptr += 4; + + if (pixval != blankval) + { + if (pixval < minval) + minval = pixval; + else if (pixval > maxval) + maxval = pixval; + } + else + { + blank_found = TRUE; + } + } + } + else + { + while (maxelem-- > 0) + { + FITS_GETBITPIX32 (ptr, pixval); + ptr += 4; + + if (pixval < minval) + minval = pixval; + else if (pixval > maxval) + maxval = pixval; + } + } + } + + hdu->pixmin = minval; + hdu->pixmax = maxval; + break; + } + + case -32: + { + register FitsBitpixM32 pixval = 0; + register guchar *ptr; + FitsBitpixM32 minval = 0; + FitsBitpixM32 maxval = 0; + gboolean first = TRUE; + + while (nelem > 0) + { + maxelem = sizeof (pixdat) / bpp; + if (nelem < maxelem) + maxelem = nelem; + + nelem -= maxelem; + if (fread ((gchar *) pixdat, bpp, maxelem, fp) != maxelem) + FITS_RETURN ("fits_eval_pixrange: error on read bitpix -32 data", -1); + + ptr = pixdat; + while (maxelem-- > 0) + { + if (! fits_nan_32 (ptr)) + { + FITS_GETBITPIXM32 (ptr, pixval); + ptr += 4; + + if (first) + { + first = FALSE; + minval = maxval = pixval; + } + else if (pixval < minval) + { + minval = pixval; + } + else if (pixval > maxval) + { + maxval = pixval; + } + } + else + { + nan_found = TRUE; + } + } + } + + hdu->pixmin = minval; + hdu->pixmax = maxval; + break; + } + + case -64: + { + register FitsBitpixM64 pixval; + register guchar *ptr; + FitsBitpixM64 minval = 0; + FitsBitpixM64 maxval = 0; + gboolean first = TRUE; + + while (nelem > 0) + { + maxelem = sizeof (pixdat) / bpp; + if (nelem < maxelem) + maxelem = nelem; + + nelem -= maxelem; + if (fread ((gchar *) pixdat, bpp, maxelem, fp) != maxelem) + FITS_RETURN ("fits_eval_pixrange: error on read bitpix -64 data", -1); + + ptr = pixdat; + while (maxelem-- > 0) + { + if (! fits_nan_64 (ptr)) + { + FITS_GETBITPIXM64 (ptr, pixval); + ptr += 8; + + if (first) + { + first = FALSE; + minval = maxval = pixval; + } + else if (pixval < minval) + { + minval = pixval; + } + else if (pixval > maxval) + { + maxval = pixval; + } + } + else + { + nan_found = TRUE; + } + } + } + + hdu->pixmin = minval; + hdu->pixmax = maxval; + break; + } + } + + if (nan_found) + hdu->used.nan_value = TRUE; + + if (blank_found) + hdu->used.blank_value = TRUE; + + return 0; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_decode_card - decode a card */ +/* */ +/* Parameters: */ +/* const char *card [I] : pointer to card image */ +/* FitsDataType data_type [I] : datatype to decode */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* Decodes a card and returns a pointer to the union, keeping the data. */ +/* If card is NULL or on failure, a NULL-pointer is returned. */ +/* If the card does not have the value indicator, an error is generated, */ +/* but its tried to decode the card. The data is only valid up to the next */ +/* call of the function. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +FitsData * +fits_decode_card (const gchar *card, + FitsDataType data_type) +{ + static FitsData data; + glong l_long; + gdouble l_double; + gchar l_card[FITS_CARD_SIZE + 1]; + gchar msg[256]; + gchar *cp, *dst, *end; + gint ErrCount = 0; + + if (card == NULL) + return NULL; + + memcpy (l_card, card, FITS_CARD_SIZE); + l_card[FITS_CARD_SIZE] = '\0'; + + if (strncmp (card+8, "= ", 2) != 0) + { + g_snprintf (msg, sizeof (msg), + "fits_decode_card (warning): Missing value indicator " + "'= ' for %8.8s", l_card); + fits_set_error (msg); + ErrCount++; + } + + switch (data_type) + { + case FITS_DATA_TYPE_BITPIX_8: + data.bitpix8 = (FitsBitpix8) (l_card[10]); + break; + + case FITS_DATA_TYPE_BITPIX_16: + if (sscanf (l_card + 10, "%ld", &l_long) != 1) + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_BITPIX_16"); + ErrCount++; + break; + } + data.bitpix16 = (FitsBitpix16) l_long; + break; + + case FITS_DATA_TYPE_BITPIX_32: + if (sscanf (l_card + 10, "%ld", &l_long) != 1) + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_BITPIX_32"); + ErrCount++; + break; + } + data.bitpix32 = (FitsBitpix32) l_long; + break; + + case FITS_DATA_TYPE_BITPIX_M32: + if (fits_scanfdouble (l_card + 10, &l_double) != 1) + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_BITPIX_M32"); + ErrCount++; + break; + } + data.bitpixm32 = (FitsBitpixM32) l_double; + break; + + case FITS_DATA_TYPE_BITPIX_M64: + if (fits_scanfdouble (l_card + 10, &l_double) != 1) + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_BITPIX_M64"); + ErrCount++; + break; + } + data.bitpixm64 = (FitsBitpixM64) l_double; + break; + + case FITS_DATA_TYPE_FBOOL: + cp = l_card + 10; + while (*cp == ' ') + cp++; + + if (*cp == 'T') + { + data.fbool = 1; + } + else if (*cp == 'F') + { + data.fbool = 0; + } + else + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_FBOOL"); + ErrCount++; + break; + } + break; + + case FITS_DATA_TYPE_FLONG: + if (sscanf (l_card + 10, "%ld", &l_long) != 1) + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_FLONG"); + ErrCount++; + break; + } + data.flong = (FitsBitpix32) l_long; + break; + + case FITS_DATA_TYPE_FDOUBLE: + if (fits_scanfdouble (l_card + 10, &l_double) != 1) + { + fits_set_error ("fits_decode_card: error decoding FITS_DATA_TYPE_FDOUBLE"); + ErrCount++; + break; + } + data.fdouble = (FitsBitpixM32) l_double; + break; + + case FITS_DATA_TYPE_FSTRING: + cp = l_card + 10; + if (*cp != '\'') + { + fits_set_error ("fits_decode_card: missing \' decoding FITS_DATA_TYPE_FSTRING"); + ErrCount++; + break; + } + + dst = data.fstring; + cp++; + end = l_card + FITS_CARD_SIZE - 1; + for (;;) /* Search for trailing quote */ + { + if (*cp != '\'') /* All characters but quote are used. */ + { + *(dst++) = *cp; + } + else /* Maybe there is a quote in the string */ + { + if (cp >= end) + break; /* End of card ? finished */ + + if (*(cp+1) != '\'') + break; + + *(dst++) = *(cp++); + } + + if (cp >= end) + break; + + cp++; + } + + *dst = '\0'; + break; + } + + return (ErrCount == 0) ? &data : NULL; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_search_card - search a card in the record list */ +/* */ +/* Parameters: */ +/* FitsRecordList *rl [I] : record list to search */ +/* char *keyword [I] : keyword identifying the card */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* A card is searched in the record list. Only the first eight characters of */ +/* keyword are significant. If keyword is less than 8 characters, its filled */ +/* with blanks. */ +/* If the card is found, a pointer to the card is returned. */ +/* The pointer does not point to a null-terminated string. Only the next */ +/* 80 bytes are allowed to be read. */ +/* On failure a NULL-pointer is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gchar * +fits_search_card (FitsRecordList *rl, + gchar *keyword) +{ + gint key_len, k; + gchar key[9]; + + key_len = strlen (keyword); + if (key_len > 8) + key_len = 8; + if (key_len == 0) + FITS_RETURN ("fits_search_card: Invalid parameter", NULL); + + strcpy (key, " "); + memcpy (key, keyword, key_len); + + while (rl != NULL) + { + gchar *card = (gchar *) rl->data; + + for (k = 0; k < FITS_RECORD_SIZE / FITS_CARD_SIZE; k++) + { + if (strncmp (card, key, 8) == 0) + return (card); + + card += FITS_CARD_SIZE; + } + + rl = rl->next_record; + } + + return NULL; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_image_info - get information about an image */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : FITS file structure */ +/* int picind [I] : Index of picture in file (1,2,...) */ +/* int *hdupicind [O] : Index of picture in HDU (1,2,...) */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function returns on success a pointer to a FitsHduList. hdupicind */ +/* then gives the index of the image within the HDU. */ +/* On failure, NULL is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +FitsHduList * +fits_image_info (FitsFile *ff, + gint picind, + gint *hdupicind) +{ + FitsHduList *hdulist; + gint firstpic, lastpic; + + if (ff == NULL) + FITS_RETURN ("fits_image_info: ff is NULL", NULL); + + if (ff->openmode != 'r') + FITS_RETURN ("fits_image_info: file not open for reading", NULL); + + if ((picind < 1) || (picind > ff->n_pic)) + FITS_RETURN ("fits_image_info: picind out of range", NULL); + + firstpic = 1; + for (hdulist = ff->hdu_list; hdulist != NULL; hdulist = hdulist->next_hdu) + { + if (hdulist->numpic <= 0) + continue; + + lastpic = firstpic + hdulist->numpic - 1; + + if (picind <= lastpic) /* Found image in current HDU ? */ + break; + + firstpic = lastpic + 1; + } + + *hdupicind = picind - firstpic + 1; + + return hdulist; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_seek_image - position to a specific image */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : FITS file structure */ +/* int picind [I] : Index of picture to seek (1,2,...) */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function positions the file pointer to a specified image. */ +/* The function returns on success a pointer to a FitsHduList. This pointer */ +/* must also be used when reading data from the image. */ +/* On failure, NULL is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +FitsHduList * +fits_seek_image (FitsFile *ff, + gint picind) +{ + FitsHduList *hdulist; + gint hdupicind; + glong offset, pic_size; + + hdulist = fits_image_info (ff, picind, &hdupicind); + if (hdulist == NULL) + return NULL; + + pic_size = hdulist->bpp * hdulist->naxisn[0] * hdulist->naxisn[1]; + offset = hdulist->data_offset + (hdupicind - 1) * pic_size; + if (fseek (ff->fp, offset, SEEK_SET) < 0) + FITS_RETURN ("fits_seek_image: Unable to position to image", NULL); + + return hdulist; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_read_pixel - read pixel values from a file */ +/* */ +/* Parameters: */ +/* FitsFile *ff [I] : FITS file structure */ +/* FitsHduList *hdulist [I] : pointer to hdulist that describes image */ +/* int npix [I] : number of pixel values to read */ +/* FitsPixTransform *trans [I]: pixel transformation */ +/* void *buf [O] : buffer where to place transformed pixels */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function reads npix pixel values from the file, transforms them */ +/* checking for blank/NaN pixels and stores the transformed values in buf. */ +/* The number of transformed pixels is returned. If the returned value is */ +/* less than npix (or even -1), an error has occurred. */ +/* hdulist must be a pointer returned by fits_seek_image(). Before starting */ +/* to read an image, fits_seek_image() must be called. Even for successive */ +/* images. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gint +fits_read_pixel (FitsFile *ff, + FitsHduList *hdulist, + gint npix, + FitsPixTransform *trans, + void *buf) +{ + gdouble offs, scale; + gdouble datadiff, pixdiff; + guchar pixbuffer[4096]; + guchar *pix; + glong creplace; + gint transcount = 0; + glong tdata, tmin, tmax; + gint maxelem; + + if (ff->openmode != 'r') + return -1; /* Not open for reading */ + + if (trans->dsttyp != 'k') + return -1; /* Currently we only return types equivalent to the image format */ + + if (npix <= 0) + return npix; + + datadiff = trans->datamax - trans->datamin; + pixdiff = trans->pixmax - trans->pixmin; + + offs = trans->datamin - trans->pixmin * datadiff / pixdiff; + scale = datadiff / pixdiff; + + tmin = (glong) trans->datamin; + tmax = (glong) trans->datamax; + + creplace = (glong) trans->replacement; + + switch (hdulist->bitpix) + { + case 8: + { + guchar *cdata = (guchar *) buf; + while (npix > 0) /* For all pixels to read */ + { + FitsBitpix8 bp8, bp8blank; + + maxelem = sizeof (pixbuffer) / hdulist->bpp; + if (maxelem > npix) + maxelem = npix; + + if (fread ((gchar *) pixbuffer, hdulist->bpp, + maxelem, ff->fp) != maxelem) + return -1; + + npix -= maxelem; + + pix = pixbuffer; + + if (hdulist->used.blank) + { + bp8blank = (FitsBitpix8) hdulist->blank; + + while (maxelem--) + { + bp8 = (FitsBitpix8) * (pix++); + + if (bp8 == bp8blank) /* Is it a blank pixel ? */ + { + *(cdata++) = (guchar) creplace; + } + else /* Do transform */ + { + tdata = (glong) (bp8 * scale + offs); + tdata = CLAMP (tdata, tmin, tmax); + + *(cdata++) = (guchar) tdata; + } + + transcount++; + } + } + else + { + while (maxelem--) + { + bp8 = (FitsBitpix8) * (pix++); + + tdata = (glong) (bp8 * scale + offs); + tdata = CLAMP (tdata, tmin, tmax); + + *(cdata++) = (guchar) tdata; + + transcount++; + } + } + } + } + break; + + case 16: + { + FitsBitpix16 *cdata = (FitsBitpix16 *) buf; + while (npix > 0) /* For all pixels to read */ + { + FitsBitpix16 bp16, bp16blank; + + maxelem = sizeof (pixbuffer) / hdulist->bpp; + if (maxelem > npix) + maxelem = npix; + + if (fread ((gchar *) pixbuffer, hdulist->bpp, + maxelem, ff->fp) != maxelem) + return -1; + + npix -= maxelem; + + pix = pixbuffer; + if (hdulist->used.blank) + { + bp16blank = (FitsBitpix16) hdulist->blank; + + while (maxelem--) + { + FITS_GETBITPIX16 (pix, bp16); + + if (bp16 == bp16blank) + { + *(cdata++) = (FitsBitpix16) creplace; + } + else + { + tdata = (glong) (bp16 * scale + offs); + + if (tdata < tmin) + tdata = tmin; + else if (tdata > tmax) + tdata = tmax; + + *(cdata++) = (FitsBitpix16) tdata; + } + + transcount++; + pix += 2; + } + } + else + { + while (maxelem--) + { + FITS_GETBITPIX16 (pix, bp16); + + tdata = (glong) (bp16 * scale + offs); + if (tdata < tmin) + tdata = tmin; + else if (tdata > tmax) + tdata = tmax; + + *(cdata++) = (FitsBitpix16) tdata; + + transcount++; + pix += 2; + } + } + } + } + break; + + case 32: + { + FitsBitpix32 *cdata = (FitsBitpix32 *) buf; + while (npix > 0) /* For all pixels to read */ + { + FitsBitpix32 bp32, bp32blank; + + maxelem = sizeof (pixbuffer) / hdulist->bpp; + if (maxelem > npix) + maxelem = npix; + + if (fread ((gchar *) pixbuffer, hdulist->bpp, + maxelem, ff->fp) != maxelem) + return -1; + + npix -= maxelem; + + pix = pixbuffer; + if (hdulist->used.blank) + { + bp32blank = (FitsBitpix32) hdulist->blank; + + while (maxelem--) + { + FITS_GETBITPIX32 (pix, bp32); + + if (bp32 == bp32blank) + { + *(cdata++) = (FitsBitpix32) creplace; + } + else + { + tdata = (glong) (bp32 * scale + offs); + if (tdata < tmin) + tdata = tmin; + else if (tdata > tmax) + tdata = tmax; + + *(cdata++) = (FitsBitpix32) tdata; + } + + transcount++; + pix += 4; + } + } + else + { + while (maxelem--) + { + FITS_GETBITPIX32 (pix, bp32); + + tdata = (glong) (bp32 * scale + offs); + tdata = CLAMP (tdata, tmin, tmax); + + *(cdata++) = (FitsBitpix32) tdata; + + transcount++; + pix += 4; + } + } + } + } + break; + + case -32: + { + FitsBitpixM32 *cdata = (FitsBitpixM32 *) buf; + while (npix > 0) /* For all pixels to read */ + { + FitsBitpixM32 bpm32 = 0; + + maxelem = sizeof (pixbuffer) / hdulist->bpp; + if (maxelem > npix) + maxelem = npix; + + if (fread ((gchar *) pixbuffer, hdulist->bpp, + maxelem, ff->fp) != maxelem) + return -1; + + npix -= maxelem; + + pix = pixbuffer; + while (maxelem--) + { + if (fits_nan_32 (pix)) /* An IEEE special value ? */ + { + *(cdata++) = trans->replacement; + } + else /* Do transform */ + { + FITS_GETBITPIXM32 (pix, bpm32); + + bpm32 = bpm32 * scale + offs; + bpm32 = CLAMP (bpm32, trans->datamin, trans->datamax); + + *(cdata++) = bpm32; + } + + transcount++; + pix += 4; + } + } + } + break; + + case -64: + { + FitsBitpixM64 *cdata = (FitsBitpixM64 *) buf; + while (npix > 0) /* For all pixels to read */ + { + FitsBitpixM64 bpm64; + + maxelem = sizeof (pixbuffer) / hdulist->bpp; + if (maxelem > npix) + maxelem = npix; + + if (fread ((gchar *) pixbuffer, hdulist->bpp, + maxelem, ff->fp) != maxelem) + return -1; + + npix -= maxelem; + + pix = pixbuffer; + while (maxelem--) + { + if (fits_nan_64 (pix)) + { + *(cdata++) = trans->replacement; + } + else + { + FITS_GETBITPIXM64 (pix, bpm64); + + bpm64 = bpm64 * scale + offs; + bpm64 = CLAMP (bpm64, trans->datamin, trans->datamax); + + *(cdata++) = bpm64; + } + + transcount++; + pix += 8; + } + } + } + break; + } + + return transcount; +} + + +#ifndef FITS_NO_DEMO + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : fits_to_pgmraw - convert FITS-file to raw PGM-file */ +/* */ +/* Parameters: */ +/* char *fitsfile [I] : name of fitsfile */ +/* char *pgmfile [I] : name of pgmfile */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function converts a FITS-file to a raw PGM-file. The PGM-file will */ +/* be upside down, because the orientation for storing the image is */ +/* different. On success, 0 is returned. On failure, -1 is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gint +fits_to_pgmraw (gchar *fitsfile, + gchar *pgmfile) +{ + FitsFile *fitsin = NULL; + FILE *pgmout = NULL; + FitsHduList *hdu; + FitsPixTransform trans; + gint retval = -1, nbytes, maxbytes; + gchar buffer[1024]; + + fitsin = fits_open (fitsfile, "r"); /* Open FITS-file for reading */ + if (fitsin == NULL) + goto err_return; + + if (fitsin->n_pic < 1) + goto err_return; /* Any picture in it ? */ + + hdu = fits_seek_image (fitsin, 1); /* Position to the first image */ + if (hdu == NULL) + goto err_return; + + if (hdu->naxis < 2) + goto err_return; /* Enough dimensions ? */ + + pgmout = g_fopen (pgmfile, "wb"); + if (pgmout == NULL) + goto err_return; + + /* Write PGM header with width/height */ + fprintf (pgmout, "P5\n%d %d\n255\n", hdu->naxisn[0], hdu->naxisn[1]); + + /* Set up transformation for FITS pixel values to 0...255 */ + /* It maps trans.pixmin to trans.datamin and trans.pixmax to trans.datamax. */ + /* Values out of range [datamin, datamax] are clamped */ + trans.pixmin = hdu->pixmin; + trans.pixmax = hdu->pixmax; + trans.datamin = 0.0; + trans.datamax = 255.0; + trans.replacement = 0.0; /* Blank/NaN replacement value */ + trans.dsttyp = 'c'; /* Output type is character */ + + nbytes = hdu->naxisn[0]*hdu->naxisn[1]; + while (nbytes > 0) + { + maxbytes = sizeof (buffer); + if (maxbytes > nbytes) + maxbytes = nbytes; + + /* Read pixels and transform them */ + if (fits_read_pixel (fitsin, hdu, maxbytes, &trans, buffer) != maxbytes) + goto err_return; + + if (fwrite (buffer, 1, maxbytes, pgmout) != maxbytes) + goto err_return; + + nbytes -= maxbytes; + } + + retval = 0; + + err_return: + + if (fitsin) + fits_close (fitsin); + + if (pgmout) + fclose (pgmout); + + return retval; +} + + +/*****************************************************************************/ +/* #BEG-PAR */ +/* */ +/* Function : pgmraw to fits - convert raw PGM-file to FITS-file */ +/* */ +/* Parameters: */ +/* char *pgmfile [I] : name of pgmfile */ +/* char *fitsfile [I] : name of fitsfile */ +/* ( mode : I=input, O=output, I/O=input/output ) */ +/* */ +/* The function converts a raw PGM-file to a FITS-file. The FITS-file will */ +/* be upside down, because the orientation for storing the image is */ +/* different. On success, 0 is returned. On failure, -1 is returned. */ +/* */ +/* #END-PAR */ +/*****************************************************************************/ + +gint +pgmraw_to_fits (gchar *pgmfile, + gchar *fitsfile) +{ + FitsFile *fitsout = NULL; + FILE *pgmin = NULL; + FitsHduList *hdu; + gchar buffer[1024]; + gint width, height, numbytes, maxbytes; + gint retval = -1; + + fitsout = fits_open (fitsfile, "w"); + if (fitsout == NULL) + goto err_return; + + pgmin = g_fopen (pgmfile, "r"); + if (pgmin == NULL) + goto err_return; + + /* Read signature of PGM file */ + if (fgets (buffer, sizeof (buffer), pgmin) == NULL) + goto err_return; + + if ((buffer[0] != 'P') || (buffer[1] != '5')) + goto err_return; + + /* Skip comments up to width/height */ + do + { + if (fgets (buffer, sizeof (buffer), pgmin) == NULL) + goto err_return; + } + while (buffer[0] == '#'); + + if (sscanf (buffer, "%d%d", &width, &height) != 2) + goto err_return; + + if ((width < 1) || (height < 1)) + goto err_return; + + /* Skip comments up to maxval */ + do + { + if (fgets (buffer, sizeof (buffer), pgmin) == NULL) + goto err_return; + } + while (buffer[0] == '#'); + + /* Ignore maxval */ + + hdu = fits_add_hdu (fitsout); /* Create a HDU for the FITS file */ + if (hdu == NULL) + goto err_return; + + hdu->used.simple = 1; /* Set proper values */ + hdu->bitpix = 8; + hdu->naxis = 2; + hdu->naxisn[0] = width; + hdu->naxisn[1] = height; + hdu->used.datamin = 1; + hdu->datamin = 0.0; + hdu->used.datamax = 1; + hdu->datamax = 255.0; + hdu->used.bzero = 1; + hdu->bzero = 0.0; + hdu->used.bscale = 1; + hdu->bscale = 1.0; + + fits_add_card (hdu, ""); + fits_add_card (hdu, + "HISTORY THIS FITS FILE WAS GENERATED BY FITSRW " + "USING PGMRAW_TO_FITS"); + + /* Write the header. Blocking is done automatically */ + if (fits_write_header (fitsout, hdu) < 0) + goto err_return; + + /* The primary array plus blocking must be written manually */ + numbytes = width * height; + + while (numbytes > 0) + { + maxbytes = sizeof (buffer); + if (maxbytes > numbytes) + maxbytes = numbytes; + + if (fread (buffer, 1, maxbytes, pgmin) != maxbytes) + goto err_return; + + if (fwrite (buffer, 1, maxbytes, fitsout->fp) != maxbytes) + goto err_return; + + numbytes -= maxbytes; + } + + /* Do blocking */ + numbytes = (width * height) % FITS_RECORD_SIZE; + if (numbytes) + { + while (numbytes++ < FITS_RECORD_SIZE) + if (putc (0, fitsout->fp) == EOF) + goto err_return; + } + + retval = 0; + + err_return: + + if (fitsout) + fits_close (fitsout); + + if (pgmin) + fclose (pgmin); + + return retval; +} + +#endif /* ! FITS_NO_DEMO */ diff --git a/plug-ins/file-fits/fits-io.h b/plug-ins/file-fits/fits-io.h new file mode 100644 index 0000000..8732db1 --- /dev/null +++ b/plug-ins/file-fits/fits-io.h @@ -0,0 +1,199 @@ +/******************************************************************************/ +/* Peter Kirchgessner */ +/* e-mail: pkirchg@aol.com */ +/* WWW : http://members.aol.com/pkirchg */ +/******************************************************************************/ +/* #BEG-HDR */ +/* */ +/* Package : FITS reading/writing library */ +/* Modul-Name : fitsrw.h */ +/* Description : Include file for FITS-r/w-library */ +/* Function(s) : */ +/* Author : P. Kirchgessner */ +/* Date of Gen. : 12-Apr-97 */ +/* Last modified : 17-May-97 */ +/* Version : 0.10 */ +/* Compiler Opt. : */ +/* Changes : */ +/* */ +/* #END-HDR */ +/******************************************************************************/ + +#ifndef __FITS_IO_H__ +#define __FITS_IO_H__ + +#define FITS_CARD_SIZE 80 +#define FITS_RECORD_SIZE 2880 +#define FITS_MAX_AXIS 999 + +#define FITS_NADD_CARDS 128 + +/* Data representations */ + +typedef guchar FitsBitpix8; +typedef gint16 FitsBitpix16; +typedef gint32 FitsBitpix32; +typedef float FitsBitpixM32; +typedef double FitsBitpixM64; +typedef gint32 FitsBool; +typedef gint32 FitsLong; +typedef double FitsDouble; +typedef char FitsString[FITS_CARD_SIZE]; + +typedef enum +{ + FITS_DATA_TYPE_BITPIX_8, + FITS_DATA_TYPE_BITPIX_16, + FITS_DATA_TYPE_BITPIX_32, + FITS_DATA_TYPE_BITPIX_M32, + FITS_DATA_TYPE_BITPIX_M64, + FITS_DATA_TYPE_FBOOL, + FITS_DATA_TYPE_FLONG, + FITS_DATA_TYPE_FDOUBLE, + FITS_DATA_TYPE_FSTRING +} FitsDataType; + +typedef union +{ + FitsBitpix8 bitpix8; + FitsBitpix16 bitpix16; + FitsBitpix32 bitpix32; + FitsBitpixM32 bitpixm32; + FitsBitpixM64 bitpixm64; + FitsBool fbool; + FitsLong flong; + FitsDouble fdouble; + FitsString fstring; +} FitsData; + + +/* How to transform FITS pixel values */ + +typedef struct _FitsPixTransform FitsPixTransform; + +struct _FitsPixTransform +{ + gdouble pixmin, pixmax; /* Pixel values [pixmin,pixmax] should be mapped */ + gdouble datamin, datamax; /* to [datamin,datamax] */ + gdouble replacement; /* datavalue to use for blank or NaN pixels */ + gchar dsttyp; /* Destination typ ('c' = char) */ +}; + + +/* Record list */ + +typedef struct _FitsRecordList FitsRecordList; + +struct _FitsRecordList +{ + gchar data[FITS_RECORD_SIZE]; + FitsRecordList *next_record; +}; + + +/* Header and Data Unit List */ + +typedef struct _FitsHduList FitsHduList; + +struct _FitsHduList +{ + glong header_offset; /* Offset of header in the file */ + glong data_offset; /* Offset of data in the file */ + glong data_size; /* Size of data in the HDU (including pad)*/ + glong udata_size; /* Size of used data in the HDU (excl. pad) */ + gint bpp; /* Bytes per pixel */ + gint numpic; /* Number of interpretable images in HDU */ + gint naddcards; /* Number of additional cards */ + gchar addcards[FITS_NADD_CARDS][FITS_CARD_SIZE]; + struct + { + gboolean nan_value; /* NaN's found in data ? */ + gboolean blank_value; /* Blanks found in data ? */ + /* Flags specifying if some cards are used */ + gchar blank; /* The corresponding data below is only */ + gchar datamin; /* valid, if the flag is set. */ + gchar datamax; + gchar simple; /* This indicates a simple HDU */ + gchar xtension; /* This indicates an extension */ + gchar gcount; + gchar pcount; + gchar bzero; + gchar bscale; + gchar groups; + gchar extend; + } used; + gdouble pixmin, pixmax; /* Minimum/Maximum pixel values */ + /* Some decoded data of the HDU: */ + gint naxis; /* Number of axes */ + gint naxisn[FITS_MAX_AXIS]; /* Sizes of axes (NAXIS1 --> naxisn[0]) */ + gint bitpix; /* Data representation (8,16,32,-16,-32) */ + /* When using the following data, */ + /* the used-flags must be checked before. */ + glong blank; /* Blank value */ + gdouble datamin, datamax; /* Minimum/Maximum physical data values */ + gchar xtension[FITS_CARD_SIZE];/* Type of extension */ + glong gcount, pcount; /* Used by XTENSION */ + gdouble bzero, bscale; /* Transformation values */ + gint groups; /* Random groups indicator */ + gint extend; /* Extend flag */ + + FitsRecordList *header_record_list; /* Header records read in */ + + FitsHduList *next_hdu; +}; + + +typedef struct _FitsFile FitsFile; + +struct _FitsFile +{ + FILE *fp; /* File pointer to fits file */ + gchar openmode; /* Mode the file was opened (0, 'r', 'w') */ + + gint n_hdu; /* Number of HDUs in file */ + gint n_pic; /* Total number of interpretable pictures */ + gboolean nan_used; /* NaN's used in the file ? */ + gboolean blank_used; /* Blank's used in the file ? */ + + FitsHduList *hdu_list; /* Header and Data Unit List */ +}; + + +/* User callable functions of the FITS-library */ + +FitsFile * fits_open (const gchar *filename, + const gchar *openmode); +void fits_close (FitsFile *ff); +FitsHduList * fits_add_hdu (FitsFile *ff); +gint fits_add_card (FitsHduList *hdulist, + const gchar *card); +gint fits_write_header (FitsFile *ff, + FitsHduList *hdulist); +FitsHduList * fits_image_info (FitsFile *ff, + gint picind, + gint *hdupicind); +FitsHduList * fits_seek_image (FitsFile *ff, + gint picind); +void fits_print_header (FitsHduList *hdr); +FitsData * fits_decode_card (const gchar *card, + FitsDataType data_type); +gchar * fits_search_card (FitsRecordList *rl, + gchar *keyword); +gint fits_read_pixel (FitsFile *ff, + FitsHduList *hdulist, + gint npix, + FitsPixTransform *trans, + void *buf); + +gchar * fits_get_error (void); + + +/* Demo functions */ + +#define FITS_NO_DEMO +gint fits_to_pgmraw (gchar *fitsfile, + gchar *pgmfile); +gint pgmraw_to_fits (gchar *pgmfile, + gchar *fitsfile); + +#endif /* __FITS_IO_H__ */ diff --git a/plug-ins/file-fits/fits.c b/plug-ins/file-fits/fits.c new file mode 100644 index 0000000..b843a68 --- /dev/null +++ b/plug-ins/file-fits/fits.c @@ -0,0 +1,1222 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * FITS file plugin + * reading and writing code Copyright (C) 1997 Peter Kirchgessner + * e-mail: peter@kirchgessner.net, WWW: http://www.kirchgessner.net + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + * + */ + +/* Event history: + * V 1.00, PK, 05-May-97: Creation + * V 1.01, PK, 19-May-97: Problem with compilation on Irix fixed + * V 1.02, PK, 08-Jun-97: Bug with saving gray images fixed + * V 1.03, PK, 05-Oct-97: Parse rc-file + * V 1.04, PK, 12-Oct-97: No progress bars for non-interactive mode + * V 1.05, nn, 20-Dec-97: Initialize image_ID in run() + * V 1.06, PK, 21-Nov-99: Internationalization + * Fix bug with gimp_export_image() + * (moved it from load to save) + * V 1.07, PK, 16-Aug-06: Fix problems with internationalization + * (writing 255,0 instead of 255.0) + * Fix problem with not filling up properly last record + */ + +#include "config.h" + +#include <string.h> +#include <errno.h> + +#include <glib/gstdio.h> + +#include <libgimp/gimp.h> +#include <libgimp/gimpui.h> + +#include "fits-io.h" + +#include "libgimp/stdplugins-intl.h" + + +#define LOAD_PROC "file-fits-load" +#define SAVE_PROC "file-fits-save" +#define PLUG_IN_BINARY "file-fits" +#define PLUG_IN_ROLE "gimp-file-fits" + + +/* Load info */ +typedef struct +{ + gint replace; /* replacement for blank/NaN-values */ + gint use_datamin; /* Use DATAMIN/MAX-scaling if possible */ + gint compose; /* compose images with naxis==3 */ +} FITSLoadVals; + + +/* Declare some local functions. + */ +static void query (void); +static void run (const gchar *name, + gint nparams, + const GimpParam *param, + gint *nreturn_vals, + GimpParam **return_vals); + +static gint32 load_image (const gchar *filename, + GError **error); +static gint save_image (const gchar *filename, + gint32 image_ID, + gint32 drawable_ID, + GError **error); + +static FitsHduList * create_fits_header (FitsFile *ofp, + guint width, + guint height, + guint channels, + guint bitpix); + +static gint save_fits (FitsFile *ofp, + gint32 image_ID, + gint32 drawable_ID); + +static gint32 create_new_image (const gchar *filename, + guint pagenum, + guint width, + guint height, + GimpImageBaseType itype, + GimpImageType dtype, + GimpPrecision iprecision, + gint32 *layer_ID, + GeglBuffer **buffer); + +static void check_load_vals (void); + +static gint32 load_fits (const gchar *filename, + FitsFile *ifp, + guint picnum, + guint ncompose); + +static gboolean load_dialog (void); +static void show_fits_errors (void); + + +static FITSLoadVals plvals = +{ + 0, /* Replace with black */ + 0, /* Do autoscale on pixel-values */ + 0 /* Don't compose images */ +}; + +const GimpPlugInInfo PLUG_IN_INFO = +{ + NULL, /* init_proc */ + NULL, /* quit_proc */ + query, /* query_proc */ + run, /* run_proc */ +}; + +/* The run mode */ +static GimpRunMode l_run_mode; + + +MAIN () + +static void +query (void) + +{ + static const GimpParamDef load_args[] = + { + { GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" }, + { GIMP_PDB_STRING, "filename", "The name of the file to load" }, + { GIMP_PDB_STRING, "raw-filename", "The name of the file to load" }, + }; + static const GimpParamDef load_return_vals[] = + { + { GIMP_PDB_IMAGE, "image", "Output image" }, + }; + + static const GimpParamDef save_args[] = + { + { GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" }, + { GIMP_PDB_IMAGE, "image", "Input image" }, + { GIMP_PDB_DRAWABLE, "drawable", "Drawable to export" }, + { GIMP_PDB_STRING, "filename", "The name of the file to export the image in" }, + { GIMP_PDB_STRING, "raw-filename", "The name of the file to export the image in" }, + }; + + gimp_install_procedure (LOAD_PROC, + "load file of the FITS file format", + "load file of the FITS file format " + "(Flexible Image Transport System)", + "Peter Kirchgessner", + "Peter Kirchgessner (peter@kirchgessner.net)", + "1997", + N_("Flexible Image Transport System"), + NULL, + GIMP_PLUGIN, + G_N_ELEMENTS (load_args), + G_N_ELEMENTS (load_return_vals), + load_args, load_return_vals); + + gimp_register_file_handler_mime (LOAD_PROC, "image/x-fits"); + gimp_register_magic_load_handler (LOAD_PROC, + "fit,fits", + "", + "0,string,SIMPLE"); + + gimp_install_procedure (SAVE_PROC, + "export file in the FITS file format", + "FITS exporting handles all image types except " + "those with alpha channels.", + "Peter Kirchgessner", + "Peter Kirchgessner (peter@kirchgessner.net)", + "1997", + N_("Flexible Image Transport System"), + "RGB, GRAY, INDEXED", + GIMP_PLUGIN, + G_N_ELEMENTS (save_args), 0, + save_args, NULL); + + gimp_register_file_handler_mime (SAVE_PROC, "image/x-fits"); + gimp_register_save_handler (SAVE_PROC, "fit,fits", ""); +} + + +static void +run (const gchar *name, + gint nparams, + const GimpParam *param, + gint *nreturn_vals, + GimpParam **return_vals) +{ + static GimpParam values[2]; + GimpRunMode run_mode; + GimpPDBStatusType status = GIMP_PDB_SUCCESS; + gint32 image_ID; + gint32 drawable_ID; + GimpExportReturn export = GIMP_EXPORT_CANCEL; + GError *error = NULL; + + INIT_I18N (); + gegl_init (NULL, NULL); + + l_run_mode = run_mode = (GimpRunMode)param[0].data.d_int32; + + *nreturn_vals = 1; + *return_vals = values; + + values[0].type = GIMP_PDB_STATUS; + values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR; + + if (strcmp (name, LOAD_PROC) == 0) + { + switch (run_mode) + { + case GIMP_RUN_INTERACTIVE: + /* Possibly retrieve data */ + gimp_get_data (LOAD_PROC, &plvals); + + if (!load_dialog ()) + status = GIMP_PDB_CANCEL; + break; + + case GIMP_RUN_NONINTERACTIVE: + if (nparams != 3) + status = GIMP_PDB_CALLING_ERROR; + break; + + case GIMP_RUN_WITH_LAST_VALS: + /* Possibly retrieve data */ + gimp_get_data (LOAD_PROC, &plvals); + break; + + default: + break; + } + + if (status == GIMP_PDB_SUCCESS) + { + check_load_vals (); + image_ID = load_image (param[1].data.d_string, &error); + + /* Write out error messages of FITS-Library */ + show_fits_errors (); + + if (image_ID != -1) + { + *nreturn_vals = 2; + values[1].type = GIMP_PDB_IMAGE; + values[1].data.d_image = image_ID; + } + else + { + status = GIMP_PDB_EXECUTION_ERROR; + } + + /* Store plvals data */ + if (status == GIMP_PDB_SUCCESS) + gimp_set_data (LOAD_PROC, &plvals, sizeof (FITSLoadVals)); + } + } + else if (strcmp (name, SAVE_PROC) == 0) + { + image_ID = param[1].data.d_int32; + drawable_ID = param[2].data.d_int32; + + /* eventually export the image */ + switch (run_mode) + { + case GIMP_RUN_INTERACTIVE: + case GIMP_RUN_WITH_LAST_VALS: + gimp_ui_init (PLUG_IN_BINARY, FALSE); + + export = gimp_export_image (&image_ID, &drawable_ID, "FITS", + GIMP_EXPORT_CAN_HANDLE_RGB | + GIMP_EXPORT_CAN_HANDLE_GRAY | + GIMP_EXPORT_CAN_HANDLE_INDEXED); + + if (export == GIMP_EXPORT_CANCEL) + { + values[0].data.d_status = GIMP_PDB_CANCEL; + return; + } + break; + default: + break; + } + + switch (run_mode) + { + case GIMP_RUN_INTERACTIVE: + break; + + case GIMP_RUN_NONINTERACTIVE: + /* Make sure all the arguments are there! */ + if (nparams != 5) + status = GIMP_PDB_CALLING_ERROR; + break; + + case GIMP_RUN_WITH_LAST_VALS: + break; + + default: + break; + } + + if (status == GIMP_PDB_SUCCESS) + { + if (! save_image (param[3].data.d_string, image_ID, drawable_ID, + &error)) + status = GIMP_PDB_EXECUTION_ERROR; + } + + if (export == GIMP_EXPORT_EXPORT) + gimp_image_delete (image_ID); + } + else + { + status = GIMP_PDB_CALLING_ERROR; + } + + if (status != GIMP_PDB_SUCCESS && error) + { + *nreturn_vals = 2; + values[1].type = GIMP_PDB_STRING; + values[1].data.d_string = error->message; + } + + values[0].data.d_status = status; +} + + +static gint32 +load_image (const gchar *filename, + GError **error) +{ + gint32 image_ID, *image_list, *nl; + guint picnum; + gint k, n_images, max_images, hdu_picnum; + gint compose; + FILE *fp; + FitsFile *ifp; + FitsHduList *hdu; + + fp = g_fopen (filename, "rb"); + if (!fp) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Could not open '%s' for reading: %s"), + gimp_filename_to_utf8 (filename), g_strerror (errno)); + return -1; + } + fclose (fp); + + ifp = fits_open (filename, "r"); + if (ifp == NULL) + { + g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED, + "%s", _("Error during open of FITS file")); + return -1; + } + if (ifp->n_pic <= 0) + { + g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED, + "%s", _("FITS file keeps no displayable images")); + fits_close (ifp); + return -1; + } + + image_list = g_new (gint32, 10); + n_images = 0; + max_images = 10; + + for (picnum = 1; picnum <= ifp->n_pic; ) + { + /* Get image info to see if we can compose them */ + hdu = fits_image_info (ifp, picnum, &hdu_picnum); + if (hdu == NULL) break; + + /* Get number of FITS-images to compose */ + compose = ( plvals.compose && (hdu_picnum == 1) && (hdu->naxis == 3) + && (hdu->naxisn[2] > 1) && (hdu->naxisn[2] <= 4)); + if (compose) + compose = hdu->naxisn[2]; + else + compose = 1; /* Load as GRAY */ + + image_ID = load_fits (filename, ifp, picnum, compose); + + /* Write out error messages of FITS-Library */ + show_fits_errors (); + + if (image_ID == -1) break; + if (n_images == max_images) + { + nl = (gint32 *)g_realloc (image_list, (max_images+10)*sizeof (gint32)); + if (nl == NULL) break; + image_list = nl; + max_images += 10; + } + image_list[n_images++] = image_ID; + + picnum += compose; + } + + /* Write out error messages of FITS-Library */ + show_fits_errors (); + + fits_close (ifp); + + /* Display images in reverse order. The last will be displayed by GIMP itself*/ + if (l_run_mode != GIMP_RUN_NONINTERACTIVE) + { + for (k = n_images-1; k >= 1; k--) + { + gimp_image_undo_enable (image_list[k]); + gimp_image_clean_all (image_list[k]); + gimp_display_new (image_list[k]); + } + } + + image_ID = (n_images > 0) ? image_list[0] : -1; + g_free (image_list); + + return (image_ID); +} + + +static gint +save_image (const gchar *filename, + gint32 image_ID, + gint32 drawable_ID, + GError **error) +{ + FitsFile *ofp; + GimpImageType drawable_type; + gint retval; + + drawable_type = gimp_drawable_type (drawable_ID); + + /* Make sure we're not exporting an image with an alpha channel */ + if (gimp_drawable_has_alpha (drawable_ID)) + { + g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED, + "%s", + _("FITS export cannot handle images with alpha channels")); + return FALSE; + } + + switch (drawable_type) + { + case GIMP_INDEXED_IMAGE: case GIMP_INDEXEDA_IMAGE: + case GIMP_GRAY_IMAGE: case GIMP_GRAYA_IMAGE: + case GIMP_RGB_IMAGE: case GIMP_RGBA_IMAGE: + break; + default: + g_message (_("Cannot operate on unknown image types.")); + return (FALSE); + break; + } + + gimp_progress_init_printf (_("Exporting '%s'"), + gimp_filename_to_utf8 (filename)); + + /* Open the output file. */ + ofp = fits_open (filename, "w"); + if (!ofp) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Could not open '%s' for writing: %s"), + gimp_filename_to_utf8 (filename), g_strerror (errno)); + return (FALSE); + } + + retval = save_fits (ofp,image_ID, drawable_ID); + + fits_close (ofp); + + return (retval); +} + + +/* Check (and correct) the load values plvals */ +static void +check_load_vals (void) +{ + if (plvals.replace > 255) plvals.replace = 255; +} + + +/* Create an image. Sets layer_ID, drawable and rgn. Returns image_ID */ +static gint32 +create_new_image (const gchar *filename, + guint pagenum, + guint width, + guint height, + GimpImageBaseType itype, + GimpImageType dtype, + GimpPrecision iprecision, + gint32 *layer_ID, + GeglBuffer **buffer) +{ + gint32 image_ID; + char *tmp; + + image_ID = gimp_image_new_with_precision (width, height, itype, iprecision); + + if ((tmp = g_malloc (strlen (filename) + 64)) != NULL) + { + sprintf (tmp, "%s-img%ld", filename, (long)pagenum); + gimp_image_set_filename (image_ID, tmp); + g_free (tmp); + } + else + gimp_image_set_filename (image_ID, filename); + + gimp_image_undo_disable (image_ID); + *layer_ID = gimp_layer_new (image_ID, _("Background"), width, height, + dtype, 100, + gimp_image_get_default_new_layer_mode (image_ID)); + gimp_image_insert_layer (image_ID, *layer_ID, -1, 0); + + *buffer = gimp_drawable_get_buffer (*layer_ID); + + return image_ID; +} + + +/* Load FITS image. ncompose gives the number of FITS-images which have + * to be composed together. This will result in different GIMP image types: + * 1: GRAY, 2: GRAYA, 3: RGB, 4: RGBA + */ +static gint32 +load_fits (const gchar *filename, + FitsFile *ifp, + guint picnum, + guint ncompose) +{ + register guchar *dest, *src; + guchar *data, *data_end, *linebuf; + int width, height, tile_height, scan_lines; + int i, j, max_scan; + double a, b; + gint32 layer_ID, image_ID; + GeglBuffer *buffer; + GimpImageBaseType itype; + GimpImageType dtype; + GimpPrecision iprecision; + gint err = 0; + FitsHduList *hdulist; + FitsPixTransform trans; + double datamax, replacetransform; + const Babl *type, *format; + + hdulist = fits_seek_image (ifp, (int)picnum); + if (hdulist == NULL) + return -1; + + width = hdulist->naxisn[0]; /* Set the size of the FITS image */ + height = hdulist->naxisn[1]; + + switch (hdulist->bitpix) + { + case 8: + iprecision = GIMP_PRECISION_U8_GAMMA; + type = babl_type ("u8"); + datamax = 255.0; + replacetransform = 1.0; + break; + case 16: + iprecision = GIMP_PRECISION_U16_GAMMA; /* FIXME precision */ + type = babl_type ("u16"); + datamax = 65535.0; + replacetransform = 257; + break; + case 32: + iprecision = GIMP_PRECISION_U32_LINEAR; + type = babl_type ("u32"); + datamax = 4294967295.0; + replacetransform = 16843009; + break; + case -32: + iprecision = GIMP_PRECISION_FLOAT_LINEAR; + type = babl_type ("float"); + datamax = 1.0; + replacetransform = 1.0 / 255.0; + break; + case -64: + iprecision = GIMP_PRECISION_DOUBLE_LINEAR; + type = babl_type ("double"); + datamax = 1.0; + replacetransform = 1.0 / 255.0; + break; + default: + return -1; + } + + if (ncompose == 2) + { + itype = GIMP_GRAY; + dtype = GIMP_GRAYA_IMAGE; + format = babl_format_new (babl_model ("Y'A"), + type, + babl_component ("Y'"), + babl_component ("A"), + NULL); + } + else if (ncompose == 3) + { + itype = GIMP_RGB; + dtype = GIMP_RGB_IMAGE; + format = babl_format_new (babl_model ("R'G'B'"), + type, + babl_component ("R'"), + babl_component ("G'"), + babl_component ("B'"), + NULL); + } + else if (ncompose == 4) + { + itype = GIMP_RGB; + dtype = GIMP_RGBA_IMAGE; + format = babl_format_new (babl_model ("R'G'B'A"), + type, + babl_component ("R'"), + babl_component ("G'"), + babl_component ("B'"), + babl_component ("A"), + NULL); + } + else + { + ncompose = 1; + itype = GIMP_GRAY; + dtype = GIMP_GRAY_IMAGE; + format = babl_format_new (babl_model ("Y'"), + type, + babl_component ("Y'"), + NULL); + } + + image_ID = create_new_image (filename, picnum, width, height, + itype, dtype, iprecision, + &layer_ID, &buffer); + + tile_height = gimp_tile_height (); + + data = g_malloc (tile_height * width * ncompose * hdulist->bpp); + if (data == NULL) + return -1; + + data_end = data + tile_height * width * ncompose * hdulist->bpp; + + /* If the transformation from pixel value to data value has been + * specified, use it + */ + if (plvals.use_datamin && + hdulist->used.datamin && hdulist->used.datamax && + hdulist->used.bzero && hdulist->used.bscale) + { + a = (hdulist->datamin - hdulist->bzero) / hdulist->bscale; + b = (hdulist->datamax - hdulist->bzero) / hdulist->bscale; + + if (a < b) + trans.pixmin = a, trans.pixmax = b; + else + trans.pixmin = b, trans.pixmax = a; + } + else + { + trans.pixmin = hdulist->pixmin; + trans.pixmax = hdulist->pixmax; + } + + trans.datamin = 0.0; + trans.datamax = datamax; + trans.replacement = plvals.replace * replacetransform; + trans.dsttyp = 'k'; + + /* FITS stores images with bottom row first. Therefore we have to + * fill the image from bottom to top. + */ + + if (ncompose == 1) + { + dest = data + tile_height * width * hdulist->bpp; + scan_lines = 0; + + for (i = 0; i < height; i++) + { + /* Read FITS line */ + dest -= width * hdulist->bpp; + if (fits_read_pixel (ifp, hdulist, width, &trans, dest) != width) + { + err = 1; + break; + } + + scan_lines++; + + if ((i % 20) == 0) + gimp_progress_update ((gdouble) (i + 1) / (gdouble) height); + + if ((scan_lines == tile_height) || ((i + 1) == height)) + { + gegl_buffer_set (buffer, + GEGL_RECTANGLE (0, height - i - 1, + width, scan_lines), 0, + format, dest, GEGL_AUTO_ROWSTRIDE); + + scan_lines = 0; + dest = data + tile_height * width * hdulist->bpp; + } + + if (err) + break; + } + } + else /* multiple images to compose */ + { + gint channel; + + linebuf = g_malloc (width * hdulist->bpp); + if (linebuf == NULL) + return -1; + + for (channel = 0; channel < ncompose; channel++) + { + dest = data + tile_height * width * hdulist->bpp * ncompose + channel * hdulist->bpp; + scan_lines = 0; + + for (i = 0; i < height; i++) + { + if ((channel > 0) && ((i % tile_height) == 0)) + { + /* Reload a region for follow up channels */ + max_scan = tile_height; + + if (i + tile_height > height) + max_scan = height - i; + + gegl_buffer_get (buffer, + GEGL_RECTANGLE (0, height - i - max_scan, + width, max_scan), 1.0, + format, data_end - max_scan * width * hdulist->bpp * ncompose, + GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE); + } + + /* Read FITS scanline */ + dest -= width * ncompose * hdulist->bpp; + if (fits_read_pixel (ifp, hdulist, width, &trans, linebuf) != width) + { + err = 1; + break; + } + j = width; + src = linebuf; + while (j--) + { + memcpy (dest, src, hdulist->bpp); + src += hdulist->bpp; + dest += ncompose * hdulist->bpp; + } + dest -= width * ncompose * hdulist->bpp; + scan_lines++; + + if ((i % 20) == 0) + gimp_progress_update ((gdouble) (channel * height + i + 1) / + (gdouble) (height * ncompose)); + + if ((scan_lines == tile_height) || ((i + 1) == height)) + { + gegl_buffer_set (buffer, + GEGL_RECTANGLE (0, height - i - 1, + width, scan_lines), 0, + format, dest - channel * hdulist->bpp, GEGL_AUTO_ROWSTRIDE); + + scan_lines = 0; + dest = data + tile_height * width * ncompose * hdulist->bpp + channel * hdulist->bpp; + } + + if (err) + break; + } + } + + g_free (linebuf); + } + + g_free (data); + + if (err) + g_message (_("EOF encountered on reading")); + + g_object_unref (buffer); + + gimp_progress_update (1.0); + + return err ? -1 : image_ID; +} + + +static FitsHduList * +create_fits_header (FitsFile *ofp, + guint width, + guint height, + guint channels, + guint bitpix) +{ + FitsHduList *hdulist; + gint print_ctype3 = 0; /* The CTYPE3-card may not be FITS-conforming */ + + static const char *ctype3_card[] = + { + NULL, NULL, NULL, /* bpp = 0: no additional card */ + "COMMENT Image type within GIMP: GIMP_GRAY_IMAGE", + NULL, + NULL, + "COMMENT Image type within GIMP: GIMP_GRAYA_IMAGE (gray with alpha channel)", + "COMMENT Sequence for NAXIS3 : GRAY, ALPHA", + "CTYPE3 = 'GRAYA ' / GRAY IMAGE WITH ALPHA CHANNEL", + "COMMENT Image type within GIMP: GIMP_RGB_IMAGE", + "COMMENT Sequence for NAXIS3 : RED, GREEN, BLUE", + "CTYPE3 = 'RGB ' / RGB IMAGE", + "COMMENT Image type within GIMP: GIMP_RGBA_IMAGE (rgb with alpha channel)", + "COMMENT Sequence for NAXIS3 : RED, GREEN, BLUE, ALPHA", + "CTYPE3 = 'RGBA ' / RGB IMAGE WITH ALPHA CHANNEL" + }; + + hdulist = fits_add_hdu (ofp); + if (hdulist == NULL) + return NULL; + + hdulist->used.simple = 1; + hdulist->bitpix = bitpix; + hdulist->naxis = (channels == 1) ? 2 : 3; + hdulist->naxisn[0] = width; + hdulist->naxisn[1] = height; + hdulist->naxisn[2] = channels; + hdulist->used.datamin = 1; + hdulist->datamin = 0.0; + hdulist->used.datamax = 1; + hdulist->used.bzero = 1; + hdulist->bzero = 0.0; + hdulist->used.bscale = 1; + hdulist->bscale = 1.0; + + switch (bitpix) + { + case 8: + hdulist->datamax = 255; + break; + case 16: + hdulist->datamax = 65535; + break; + case 32: + hdulist->datamax = 4294967295.0; /* .0 to silence gcc */ + break; + case -32: + hdulist->datamax = 1.0; + break; + case -64: + hdulist->datamax = 1.0; + break; + default: + return NULL; + } + + fits_add_card (hdulist, ""); + fits_add_card (hdulist, + "HISTORY THIS FITS FILE WAS GENERATED BY GIMP USING FITSRW"); + fits_add_card (hdulist, ""); + fits_add_card (hdulist, + "COMMENT FitsRW is (C) Peter Kirchgessner (peter@kirchgessner.net), but available"); + fits_add_card (hdulist, + "COMMENT under the GNU general public licence."); + fits_add_card (hdulist, + "COMMENT For sources see http://www.kirchgessner.net"); + fits_add_card (hdulist, ""); + fits_add_card (hdulist, ctype3_card[channels * 3]); + + if (ctype3_card[channels * 3 + 1] != NULL) + fits_add_card (hdulist, ctype3_card[channels * 3 + 1]); + + if (print_ctype3 && (ctype3_card[channels * 3 + 2] != NULL)) + fits_add_card (hdulist, ctype3_card[channels * 3 + 2]); + + fits_add_card (hdulist, ""); + + return hdulist; +} + + +/* Save direct colors (GRAY, GRAYA, RGB, RGBA) */ +static gint +save_fits (FitsFile *ofp, + gint32 image_ID, + gint32 drawable_ID) +{ + gint height, width, i, j, channel, channelnum; + gint tile_height, bpp, bpsl, bitpix, bpc; + long nbytes; + guchar *data, *src; + GeglBuffer *buffer; + const Babl *format, *type; + FitsHduList *hdu; + + buffer = gimp_drawable_get_buffer (drawable_ID); + + width = gegl_buffer_get_width (buffer); + height = gegl_buffer_get_height (buffer); + + format = gegl_buffer_get_format (buffer); + type = babl_format_get_type (format, 0); + + if (type == babl_type ("u8")) + { + bitpix = 8; + } + else if (type == babl_type ("u16")) + { + bitpix = 16; + } + else if (type == babl_type ("u32")) + { + bitpix = 32; + } + else if (type == babl_type ("half")) + { + bitpix = -32; + type = babl_type ("float"); + } + else if (type == babl_type ("float")) + { + bitpix = -32; + } + else if (type == babl_type ("double")) + { + bitpix = -64; + } + else + { + return FALSE; + } + + switch (gimp_drawable_type (drawable_ID)) + { + case GIMP_GRAY_IMAGE: + format = babl_format_new (babl_model ("Y'"), + type, + babl_component ("Y'"), + NULL); + break; + + case GIMP_GRAYA_IMAGE: + format = babl_format_new (babl_model ("Y'A"), + type, + babl_component ("Y'"), + babl_component ("A"), + NULL); + break; + + case GIMP_RGB_IMAGE: + case GIMP_INDEXED_IMAGE: + format = babl_format_new (babl_model ("R'G'B'"), + type, + babl_component ("R'"), + babl_component ("G'"), + babl_component ("B'"), + NULL); + break; + + case GIMP_RGBA_IMAGE: + case GIMP_INDEXEDA_IMAGE: + format = babl_format_new (babl_model ("R'G'B'A"), + type, + babl_component ("R'"), + babl_component ("G'"), + babl_component ("B'"), + babl_component ("A"), + NULL); + break; + } + + channelnum = babl_format_get_n_components (format); + bpp = babl_format_get_bytes_per_pixel (format); + + bpc = bpp / channelnum; /* Bytes per channel */ + bpsl = width * bpp; /* Bytes per scanline */ + + tile_height = gimp_tile_height (); + + /* allocate a buffer for retrieving information from the pixel region */ + src = data = (guchar *) g_malloc (width * height * bpp); + + hdu = create_fits_header (ofp, width, height, channelnum, bitpix); + if (hdu == NULL) + return FALSE; + + if (fits_write_header (ofp, hdu) < 0) + return FALSE; + + nbytes = 0; + for (channel = 0; channel < channelnum; channel++) + { + for (i = 0; i < height; i++) + { + if ((i % tile_height) == 0) + { + gint scan_lines; + + scan_lines = (i + tile_height-1 < height) ? + tile_height : (height - i); + + gegl_buffer_get (buffer, + GEGL_RECTANGLE (0, height - i - scan_lines, + width, scan_lines), 1.0, + format, data, + GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE); + + src = data + bpsl * (scan_lines - 1) + channel * bpc; + } + + if (channelnum == 1 && bitpix == 8) /* One channel and 8 bit? Write the scanline */ + { + fwrite (src, bpc, width, ofp->fp); + src += bpsl; + } + else /* Multiple channels or high bit depth */ + { + /* Write out bytes for current channel */ + /* FIXME: Don't assume a little endian arch */ + switch (bitpix) + { + case 8: + for (j = 0; j < width; j++) + { + putc (*src, ofp->fp); + src += bpp; + } + break; + case 16: + for (j = 0; j < width; j++) + { + *((guint16*)src) += 32768; + putc (*(src + 1), ofp->fp); + putc (*(src + 0), ofp->fp); + src += bpp; + } + break; + case 32: + for (j = 0; j < width; j++) + { + *((guint32*)src) += 2147483648.0; /* .0 to silence gcc */ + putc (*(src + 3), ofp->fp); + putc (*(src + 2), ofp->fp); + putc (*(src + 1), ofp->fp); + putc (*(src + 0), ofp->fp); + src += bpp; + } + break; + case -32: + for (j = 0; j < width; j++) + { + putc (*(src + 3), ofp->fp); + putc (*(src + 2), ofp->fp); + putc (*(src + 1), ofp->fp); + putc (*(src + 0), ofp->fp); + src += bpp; + } + break; + case -64: + for (j = 0; j < width; j++) + { + putc (*(src + 7), ofp->fp); + putc (*(src + 6), ofp->fp); + putc (*(src + 5), ofp->fp); + putc (*(src + 4), ofp->fp); + putc (*(src + 3), ofp->fp); + putc (*(src + 2), ofp->fp); + putc (*(src + 1), ofp->fp); + putc (*(src + 0), ofp->fp); + src += bpp; + } + break; + default: + return FALSE; + } + } + + nbytes += width * bpc; + src -= 2 * bpsl; + + if ((i % 20) == 0) + gimp_progress_update ((gdouble) (i + channel * height) / + (gdouble) (height * channelnum)); + } + } + + nbytes = nbytes % FITS_RECORD_SIZE; + if (nbytes) + { + while (nbytes++ < FITS_RECORD_SIZE) + putc (0, ofp->fp); + } + + g_free (data); + + g_object_unref (buffer); + + gimp_progress_update (1.0); + + if (ferror (ofp->fp)) + { + g_message (_("Write error occurred")); + return FALSE; + } + + return TRUE; +} + + +/* Load interface functions */ + +static gboolean +load_dialog (void) +{ + GtkWidget *dialog; + GtkWidget *vbox; + GtkWidget *frame; + gboolean run; + + gimp_ui_init (PLUG_IN_BINARY, FALSE); + + dialog = gimp_dialog_new (_("Load FITS File"), PLUG_IN_ROLE, + NULL, 0, + gimp_standard_help_func, LOAD_PROC, + + _("_Cancel"), GTK_RESPONSE_CANCEL, + _("_Open"), GTK_RESPONSE_OK, + + NULL); + + gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog), + GTK_RESPONSE_OK, + GTK_RESPONSE_CANCEL, + -1); + + gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE); + + gimp_window_set_transient (GTK_WINDOW (dialog)); + + vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12); + gtk_container_set_border_width (GTK_CONTAINER (vbox), 12); + gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), + vbox, TRUE, TRUE, 0); + gtk_widget_show (vbox); + + frame = gimp_int_radio_group_new (TRUE, _("Replacement for undefined pixels"), + G_CALLBACK (gimp_radio_button_update), + &plvals.replace, plvals.replace, + + _("_Black"), 0, NULL, + _("_White"), 255, NULL, + + NULL); + gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0); + gtk_widget_show (frame); + + frame = + gimp_int_radio_group_new (TRUE, _("Pixel value scaling"), + G_CALLBACK (gimp_radio_button_update), + &plvals.use_datamin, plvals.use_datamin, + + _("_Automatic"), FALSE, NULL, + _("By _DATAMIN/DATAMAX"), TRUE, NULL, + + NULL); + gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0); + gtk_widget_show (frame); + + frame = + gimp_int_radio_group_new (TRUE, _("Image Composing"), + G_CALLBACK (gimp_radio_button_update), + &plvals.compose, plvals.compose, + + C_("composing", "_None"), FALSE, NULL, + "NA_XIS=3, NAXIS3=2,...,4", TRUE, NULL, + + NULL); + gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0); + gtk_widget_show (frame); + + gtk_widget_show (dialog); + + run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK); + + gtk_widget_destroy (dialog); + + return run; +} + +static void +show_fits_errors (void) +{ + const gchar *msg; + + /* Write out error messages of FITS-Library */ + while ((msg = fits_get_error ()) != NULL) + g_message ("%s", msg); +} |