[301] | 1 | // ----------------------------------------------------------------------- |
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| 2 | // subsection.cc: Make sure subsections are valid for a particular |
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| 3 | // FITS file. |
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| 4 | // ----------------------------------------------------------------------- |
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| 5 | // Copyright (C) 2006, Matthew Whiting, ATNF |
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| 6 | // |
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| 7 | // This program is free software; you can redistribute it and/or modify it |
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| 8 | // under the terms of the GNU General Public License as published by the |
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| 9 | // Free Software Foundation; either version 2 of the License, or (at your |
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| 10 | // option) any later version. |
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| 11 | // |
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| 12 | // Duchamp is distributed in the hope that it will be useful, but WITHOUT |
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| 13 | // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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| 14 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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| 15 | // for more details. |
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| 16 | // |
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| 17 | // You should have received a copy of the GNU General Public License |
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| 18 | // along with Duchamp; if not, write to the Free Software Foundation, |
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| 19 | // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
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| 20 | // |
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| 21 | // Correspondence concerning Duchamp may be directed to: |
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| 22 | // Internet email: Matthew.Whiting [at] atnf.csiro.au |
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| 23 | // Postal address: Dr. Matthew Whiting |
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| 24 | // Australia Telescope National Facility, CSIRO |
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| 25 | // PO Box 76 |
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| 26 | // Epping NSW 1710 |
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| 27 | // AUSTRALIA |
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| 28 | // ----------------------------------------------------------------------- |
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[164] | 29 | #include <iostream> |
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| 30 | #include <sstream> |
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| 31 | #include <string> |
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[258] | 32 | #include <vector> |
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[164] | 33 | #include <math.h> |
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[394] | 34 | #include <wcslib/wcs.h> |
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[164] | 35 | #define WCSLIB_GETWCSTAB // define this so that we don't try and redefine |
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| 36 | // wtbarr (this is a problem when using gcc v.4+ |
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| 37 | #include <fitsio.h> |
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[393] | 38 | #include <duchamp/param.hh> |
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| 39 | #include <duchamp/duchamp.hh> |
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| 40 | #include <duchamp/Utils/Section.hh> |
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[164] | 41 | |
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[378] | 42 | namespace duchamp |
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[164] | 43 | { |
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| 44 | |
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[378] | 45 | void Param::setOffsets(struct wcsprm *wcs) |
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| 46 | { |
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[528] | 47 | /// If there is a subsection being used, set the offset values |
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| 48 | /// according to the correct dimensions given by the WCS struct. |
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| 49 | /// If not, set the offsets to zero. |
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| 50 | /// \param wcs The WCSLIB wcsprm struct that defines which axis is which. |
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| 51 | |
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[378] | 52 | if(this->flagSubsection){ // if so, then the offsets array is defined. |
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[495] | 53 | int specAxis = wcs->spec; |
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| 54 | if(specAxis<0) specAxis=2; |
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| 55 | if(specAxis>=wcs->naxis) specAxis = wcs->naxis-1; |
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[378] | 56 | this->xSubOffset = this->pixelSec.getStart(wcs->lng); |
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| 57 | this->ySubOffset = this->pixelSec.getStart(wcs->lat); |
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[495] | 58 | this->zSubOffset = this->pixelSec.getStart(specAxis); |
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[378] | 59 | } |
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| 60 | else{// else they should be 0 |
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| 61 | this->xSubOffset = this->ySubOffset = this->zSubOffset = 0; |
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| 62 | } |
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[309] | 63 | } |
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| 64 | |
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[378] | 65 | void Param::setOffsets(struct wcsprm &wcs) |
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| 66 | { |
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[528] | 67 | /// If there is a subsection being used, set the offset values |
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| 68 | /// according to the correct dimensions given by the WCS struct. |
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| 69 | /// If not, set the offsets to zero. |
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| 70 | /// \param wcs The WCSLIB wcsprm struct that defines which axis is which. |
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| 71 | |
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[378] | 72 | if(this->flagSubsection){ // if so, then the offsets array is defined. |
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[495] | 73 | int specAxis = wcs.spec; |
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| 74 | if(specAxis<0) specAxis=2; |
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| 75 | if(specAxis>=wcs.naxis) specAxis = wcs.naxis-1; |
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[378] | 76 | this->xSubOffset = this->pixelSec.getStart(wcs.lng); |
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| 77 | this->ySubOffset = this->pixelSec.getStart(wcs.lat); |
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[495] | 78 | this->zSubOffset = this->pixelSec.getStart(specAxis); |
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[378] | 79 | } |
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| 80 | else{// else they should be 0 |
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| 81 | this->xSubOffset = this->ySubOffset = this->zSubOffset = 0; |
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| 82 | } |
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[168] | 83 | } |
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[164] | 84 | |
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[378] | 85 | int Param::verifySubsection() |
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| 86 | { |
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[528] | 87 | /// Checks that the subsection strings (the pixel and stats |
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| 88 | /// subsections) are in the appropriate format, with the correct |
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| 89 | /// number of entries (one for each axis). |
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| 90 | /// |
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| 91 | /// This reads the dimensional information from the FITS file, and |
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| 92 | /// uses this with the Section::parse() function to make sure each |
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| 93 | /// section is OK. |
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| 94 | /// |
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| 95 | /// \return SUCCESS/FAILURE depending on outcome of the |
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| 96 | /// Section::parse() calls. Also FAILURE if something goes wrong with |
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| 97 | /// the FITS access. |
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[289] | 98 | |
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[378] | 99 | if(!this->flagSubsection && !this->flagStatSec){ |
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| 100 | // if we get here, we are using neither subsection |
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| 101 | return SUCCESS; |
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[289] | 102 | } |
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[378] | 103 | else{ |
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| 104 | // otherwise, at least one of the subsections is being used, and |
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| 105 | // so we need to check them |
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[289] | 106 | |
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[378] | 107 | // First open the requested FITS file and check its existence and |
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| 108 | // number of axes. |
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| 109 | int numAxes,status = 0; /* MUST initialize status */ |
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| 110 | fitsfile *fptr; |
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| 111 | |
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| 112 | // Make sure the FITS file exists |
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| 113 | int exists; |
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| 114 | fits_file_exists(this->imageFile.c_str(),&exists,&status); |
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| 115 | if(exists<=0){ |
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| 116 | fits_report_error(stderr, status); |
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| 117 | duchampWarning("Cube Reader", "Requested image does not exist!\n"); |
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| 118 | return FAILURE; |
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| 119 | } |
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| 120 | // Open the FITS file |
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| 121 | if( fits_open_file(&fptr,this->imageFile.c_str(),READONLY,&status) ){ |
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| 122 | fits_report_error(stderr, status); |
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| 123 | return FAILURE; |
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| 124 | } |
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| 125 | // Read the size information -- number of axes and their sizes |
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| 126 | status = 0; |
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| 127 | if(fits_get_img_dim(fptr, &numAxes, &status)){ |
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| 128 | fits_report_error(stderr, status); |
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| 129 | return FAILURE; |
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| 130 | } |
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| 131 | long *dimAxes = new long[numAxes]; |
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| 132 | for(int i=0;i<numAxes;i++) dimAxes[i]=1; |
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| 133 | status = 0; |
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| 134 | if(fits_get_img_size(fptr, numAxes, dimAxes, &status)){ |
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| 135 | fits_report_error(stderr, status); |
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| 136 | return FAILURE; |
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| 137 | } |
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| 138 | // Close the FITS file. |
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| 139 | status = 0; |
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| 140 | fits_close_file(fptr, &status); |
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| 141 | if (status){ |
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| 142 | duchampWarning("Cube Reader","Error closing file: "); |
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| 143 | fits_report_error(stderr, status); |
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| 144 | } |
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| 145 | |
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| 146 | /////////////////// |
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| 147 | // Now parse the subsection and make sure all that works. |
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[258] | 148 | |
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[378] | 149 | std::vector<long> dim(numAxes); |
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| 150 | for(int i=0;i<numAxes;i++) dim[i] = dimAxes[i]; |
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| 151 | delete [] dimAxes; |
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[263] | 152 | |
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[378] | 153 | if(this->flagSubsection) |
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| 154 | if(this->pixelSec.parse(dim)==FAILURE) return FAILURE; |
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[289] | 155 | |
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[378] | 156 | if(this->flagStatSec) |
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| 157 | if(this->statSec.parse(dim)==FAILURE) return FAILURE; |
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[263] | 158 | |
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[378] | 159 | return SUCCESS; |
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| 160 | } |
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| 161 | |
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[289] | 162 | } |
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| 163 | |
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[164] | 164 | } |
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