FloatImg4PythonBinding/funcs/fimg-fits.c

/*
 *		FLOATIMG
 *	import/export to/from FITS files 
 */

#include  <stdio.h>
#include  <stdlib.h>

#include  <fitsio.h>

#include  "../floatimg.h"

extern int		verbosity;

/* --------------------------------------------------------------------- */
int fimg_save_R_as_fits(FloatImg *src, char *outname, int flags)
{
fitsfile	*fptr;       		/* pointer to the FITS file */
int		status, idx, k, sz;
int		bitpix = FLOAT_IMG;

long		naxis = 2;
long		naxes[2];
float		**array;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p '%s' %d )\n", __func__, src, outname, flags);
#endif

status = 0;

remove(outname);               /* Delete old file if it already exists */
if (fits_create_file(&fptr, outname, &status)) {
	fits_report_error(stderr, status);
	return -9;
	}

naxes[0] = src->width;		naxes[1] = src->height;

array = calloc(src->height, sizeof(float *));

if (verbosity) fimg_describe(src, "to be saved as fits");

/* initialize pointers to the start of each row of the image */
for( idx=0; idx<naxes[1]; idx++ ) {
	/**** MAGIC CODE MUST COME HERE ****/
	k = naxes[1] - idx - 1;
	array[idx] = src->R + (k*naxes[0]);
	fprintf(stderr, "   %6d   %6d  %p\n", idx, k, array[idx]);
	}

if ( fits_create_img(fptr,  bitpix, naxis, naxes, &status) ) {
	fits_report_error(stderr, status);
	return -10;
	}

sz = naxes[0]*naxes[1];
if ( fits_write_img(fptr, TFLOAT, 1, sz, array[0], &status) ) {
	fits_report_error(stderr, status);
	return -10;
	}

if ( fits_close_file(fptr, &status) ) {
	fits_report_error(stderr, status);
	return -9;
	}

return 0;
}
/* --------------------------------------------------------------------- */