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#include <funtools.h>
#include <stdlib.h>
#ifdef ANSI_FUNC
int
main (int argc, char **argv)
#else
main(argc, argv)
int argc;
char **argv;
#endif
{
int i;
int bitpix, dim1, dim2;
int total;
double blimit, bvalue;
char *buf;
unsigned char *cbuf;
short *sbuf;
int *ibuf;
float *fbuf;
double *dbuf;
Fun fun, fun2;
if( argc < 4 ){
fprintf(stderr, "usage: %s iname oname blimit bvalue\n", argv[0]);
exit(1);
}
/* get blank limit and optional blank value */
blimit = atof(argv[3]);
bvalue = 0;
if( argc >= 5 )
bvalue = atof(argv[4]);
/* exit on gio errors */
setgerror(2);
/* open the input FITS file */
if( !(fun = FunOpen(argv[1], "rc", NULL)) )
gerror(stderr, "could not FunOpen input file: %s\n", argv[1]);
/* open the output FITS image, preparing to copy input params */
if( !(fun2 = FunOpen(argv[2], "w", fun)) )
gerror(stderr, "could not FunOpen output file: %s\n", argv[2]);
/* extract and bin the data section into an image buffer */
if( !(buf = FunImageGet(fun, NULL, NULL)) )
gerror(stderr, "could not FunImageGet: %s\n", argv[1]);
/* get required information from funtools structure.
this should come after the ImageGet call, in case that call
changed fun_sect_bitpix value */
FunInfoGet(fun,
FUN_SECT_BITPIX, &bitpix,
FUN_SECT_DIM1, &dim1,
FUN_SECT_DIM2, &dim2,
0);
/* set appropriate data type buffer to point to image buffer */
switch(bitpix){
case 8:
cbuf = (unsigned char *)buf; break;
case 16:
sbuf = (short *)buf; break;
case 32:
ibuf = (int *)buf; break;
case -32:
fbuf = (float *)buf; break;
case -64:
dbuf = (double *)buf; break;
}
/* loop through pixels and reset values below limit to value */
total = dim1*dim2;
for(i=0; i<total; i++){
switch(bitpix){
case 8:
if( cbuf[i] <= blimit ) cbuf[i] = bvalue;
break;
case 16:
if( sbuf[i] <= blimit ) sbuf[i] = bvalue;
break;
case 32:
if( ibuf[i] <= blimit ) ibuf[i] = bvalue;
break;
case -32:
if( fbuf[i] <= blimit ) fbuf[i] = bvalue;
break;
case -64:
if( dbuf[i] <= blimit ) dbuf[i] = bvalue;
break;
}
}
/* write the output image, updating the FITS header from the orig file */
if( !FunImagePut(fun2, buf, 0, 0, 0, NULL) )
gerror(stderr, "could not FunImagePut: %s\n", argv[2]);
/* free up space */
if( buf ) free(buf);
/* close output first so that flush happens automatically */
FunClose(fun2);
FunClose(fun);
}
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