117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/*
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* FLOATIMG
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* import/export to/from FITS files
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https://heasarc.gsfc.nasa.gov/docs/software/fitsio/c/c_user/node1.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fitsio.h>
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#include "../floatimg.h"
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extern int verbosity;
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/* --------------------------------------------------------------------- */
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int fimg_save_plane_as_fits(FloatImg *src, char *outname,
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char plane, int flags)
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{
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fitsfile *fptr; /* pointer to the FITS file */
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int status, sz;
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int bitpix = FLOAT_IMG;
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float *pplane;
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long naxis = 2;
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long naxes[2];
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p '%s' %d )\n", __func__, src, outname, flags);
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#endif
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status = 0;
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switch (plane) {
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case 'r': case 'R':
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pplane = src->R; break;
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case 'g': case 'G':
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pplane = src->G; break;
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case 'b': case 'B':
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pplane = src->B; break;
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default:
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return -66;
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}
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remove(outname); /* Delete old file if it already exists */
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if (fits_create_file(&fptr, outname, &status)) {
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fits_report_error(stderr, status);
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return -9;
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}
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naxes[0] = src->width; naxes[1] = src->height;
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if (verbosity) fimg_describe(src, "to be saved as FITS");
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if ( fits_create_img(fptr, bitpix, naxis, naxes, &status) ) {
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fits_report_error(stderr, status);
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return -10;
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}
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sz = naxes[0]*naxes[1];
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if ( fits_write_img(fptr, TFLOAT, 1, sz, pplane, &status) ) {
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fits_report_error(stderr, status);
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return -10;
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}
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if ( fits_close_file(fptr, &status) ) {
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fits_report_error(stderr, status);
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return -9;
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_save_R_as_fits(FloatImg *src, char *outname, int flags)
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{
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int retv;
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retv = fimg_save_plane_as_fits(src, outname, 'r', flags);
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return retv;
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}
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/* --------------------------------------------------------------------- */
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int fimg_save_G_as_fits(FloatImg *src, char *outname, int flags)
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{
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int retv;
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retv = fimg_save_plane_as_fits(src, outname, 'g', flags);
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return retv;
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}
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/* --------------------------------------------------------------------- */
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int fimg_save_B_as_fits(FloatImg *src, char *outname, int flags)
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{
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int retv;
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retv = fimg_save_plane_as_fits(src, outname, 'b', flags);
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return retv;
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}
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/************************************************************
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***** MAGIC CODE FROM OUTERSPACE ?
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function 'writeimage' from :
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https://heasarc.gsfc.nasa.gov/docs/software/fitsio/cexamples/cookbook.c
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float **array;
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array = calloc(src->height, sizeof(float *));
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array[0] = src->R;
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#define REVERSE 1
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for( idx=0; idx<naxes[1]; idx++ ) {
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#if REVERSE
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k = naxes[1] - idx - 1;
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#else
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k = idx;
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#endif
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array[idx] = src->R + (k*naxes[0]);
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fprintf(stderr, " %6d %6d %p\n", idx, k, array[idx]);
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}
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**************************************************************/
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