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144 lines
4.9 KiB
C++
144 lines
4.9 KiB
C++
/*
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* This file is part of Healpix_cxx.
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*
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* Healpix_cxx is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Healpix_cxx is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Healpix_cxx; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* For more information about HEALPix, see http://healpix.jpl.nasa.gov
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*/
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/*
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* Healpix_cxx is being developed at the Max-Planck-Institut fuer Astrophysik
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* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
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* (DLR).
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*/
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/*
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* Copyright (C) 2003-2010 Max-Planck-Society
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* Author: Martin Reinecke
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*/
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#include "healpix_map_fitsio.h"
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#include "healpix_map.h"
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#include "fitshandle.h"
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using namespace std;
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namespace {
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unsigned int healpix_repcount (tsize npix)
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{
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if (npix<1024) return 1;
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if ((npix%1024)==0) return 1024;
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return isqrt (npix/12);
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}
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} // unnamed namespace
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template<typename T> void read_Healpix_map_from_fits
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(fitshandle &inp, Healpix_Map<T> &map, int colnum)
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{
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arr<T> myarr;
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inp.read_entire_column (colnum, myarr);
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int64 nside = inp.get_key<int>("NSIDE");
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planck_assert (int64(myarr.size())==12*nside*nside,
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string("mismatch between number of map pixels ("
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+dataToString(myarr.size())+") and Nside ("+dataToString(nside)+")"));
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map.Set (myarr, string2HealpixScheme(inp.get_key<string>("ORDERING")));
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}
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template void read_Healpix_map_from_fits (fitshandle &inp,
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Healpix_Map<float> &map, int colnum);
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template void read_Healpix_map_from_fits (fitshandle &inp,
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Healpix_Map<double> &map, int colnum);
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template void read_Healpix_map_from_fits (fitshandle &inp,
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Healpix_Map<int> &map, int colnum);
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template<typename T> void read_Healpix_map_from_fits
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(const string &filename, Healpix_Map<T> &map, int colnum, int hdunum)
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{
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fitshandle inp;
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inp.open (filename);
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inp.goto_hdu (hdunum);
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read_Healpix_map_from_fits (inp,map,colnum);
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}
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template void read_Healpix_map_from_fits (const string &filename,
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Healpix_Map<float> &map, int colnum, int hdunum);
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template void read_Healpix_map_from_fits (const string &filename,
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Healpix_Map<double> &map, int colnum, int hdunum);
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template void read_Healpix_map_from_fits (const string &filename,
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Healpix_Map<int> &map, int colnum, int hdunum);
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void prepare_Healpix_fitsmap
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(fitshandle &out, const Healpix_Base &base, PDT datatype,
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const arr<string> &colname)
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{
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vector<fitscolumn> cols;
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int repcount = healpix_repcount (base.Npix());
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for (tsize m=0; m<colname.size(); ++m)
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cols.push_back (fitscolumn (colname[m],"unknown",repcount, datatype));
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out.insert_bintab(cols);
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out.set_key ("PIXTYPE",string("HEALPIX"),"HEALPIX pixelisation");
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string ordering = (base.Scheme()==RING) ? "RING" : "NESTED";
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out.set_key ("ORDERING",ordering,
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"Pixel ordering scheme, either RING or NESTED");
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out.set_key ("NSIDE",base.Nside(),"Resolution parameter for HEALPIX");
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out.set_key ("FIRSTPIX",0,"First pixel # (0 based)");
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out.set_key ("LASTPIX",base.Npix()-1,"Last pixel # (0 based)");
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out.set_key ("INDXSCHM",string("IMPLICIT"),
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"Indexing: IMPLICIT or EXPLICIT");
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}
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template<typename T> void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<T> &map, PDT datatype)
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{
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arr<string> colname(1);
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colname[0] = "signal";
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prepare_Healpix_fitsmap (out, map, datatype, colname);
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out.write_column(1,map.Map());
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}
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template void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<float> &map, PDT datatype);
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template void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<double> &map, PDT datatype);
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template void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<int> &map, PDT datatype);
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template<typename T> void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<T> &mapT,
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const Healpix_Map<T> &mapQ, const Healpix_Map<T> &mapU, PDT datatype)
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{
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arr<string> colname(3);
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colname[0] = "signal";
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colname[1] = "Q-pol";
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colname[2] = "U-pol";
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prepare_Healpix_fitsmap (out, mapT, datatype, colname);
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out.write_column(1,mapT.Map());
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out.write_column(2,mapQ.Map());
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out.write_column(3,mapU.Map());
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}
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template void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<float> &mapT,
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const Healpix_Map<float> &mapQ, const Healpix_Map<float> &mapU,
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PDT datatype);
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template void write_Healpix_map_to_fits
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(fitshandle &out, const Healpix_Map<double> &mapT,
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const Healpix_Map<double> &mapQ, const Healpix_Map<double> &mapU,
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PDT datatype);
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