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// Copyright (C) 1999-2017
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#include <iostream>
#include <sstream>
#include <iomanip>
using namespace std;
#include "block.h"
FitsBlock::FitsBlock(FitsFile* fits, Vector& block)
{
FitsHead* srcHead = fits->head();
width_ = srcHead->naxis(0)/block[0];
height_ = srcHead->naxis(1)/block[1];
if (width_<1)
width_ = 1;
if (height_<1)
height_ = 1;
size_ = (size_t)width_*height_;
primary_ = fits->primary();
ext_ = fits->ext();
inherit_ = fits->inherit();
bitpix_ = srcHead->hdu()->bitpix();
switch (bitpix_) {
case -64:
if (!(data_ = new double[size_]))
return;
dataSize_ = size_*sizeof(double);
break;
default:
bitpix_ = -32;
if (!(data_ = new float[size_]))
return;
dataSize_ = size_*sizeof(float);
break;
}
dataSkip_ = 0;
memset(data_, 0, dataSize_);
initHeader(fits, block);
// made it this far, must be valid
byteswap_ = 0;
endian_ = lsb() ? LITTLE : BIG;
valid_ = 1;
}
FitsBlock::~FitsBlock()
{
if (data_)
delete [] (char*)data_;
}
void FitsBlock::initHeader(FitsFile* fits, Vector& block)
{
head_ = new FitsHead(*(fits->head()));
// change bitpix
switch (bitpix_) {
case -64:
head_->setInteger("BITPIX", -64, "");
break;
default:
head_->setInteger("BITPIX", -32, "");
break;
}
// change width/height
head_->setInteger("NAXIS1", width_, "");
head_->setInteger("NAXIS2", height_, "");
// IRAF
initLTMV(block);
initCCDSUM(block);
initKeySEC("BIASSEC",block);
initKeySEC("DATASEC",block);
initKeySEC("TRIMSEC",block);
// WCS
initWCS(block);
// clear cards
if (head_->find("BZERO"))
head_->carddel("BZERO");
if (head_->find("BSCALE"))
head_->carddel("BSCALE");
if (head_->find("DATASUM"))
head_->carddel("DATASUM");
if (head_->find("CHECKSUM"))
head_->carddel("CHECKSUM");
if (head_->find("DATAMIN"))
head_->carddel("DATAMIN");
if (head_->find("DATAMAX"))
head_->carddel("DATAMAX");
if (head_->find("DATAMEAN"))
head_->carddel("DATAMEAN");
if (head_->find("GOODMIN"))
head_->carddel("GOODMIN");
if (head_->find("GOODMAX"))
head_->carddel("GOODMAX");
if (head_->find("IRAF-MIN"))
head_->carddel("IRAF-MIN");
if (head_->find("IRAF-MAX"))
head_->carddel("IRAF-MAX");
head_->updateHDU();
}
void FitsBlock::initCCDSUM(Vector& block)
{
if (head_->find("CCDSUM")) {
char* val = head_->getString("CCDSUM");
float xx,yy;
istringstream istr(val);
istr >> xx >> yy;
xx *= block[0];
yy *= block[1];
ostringstream ostr;
ostr << xx << ' ' << yy << ends;
head_->setString("CCDSUM", ostr.str().c_str(), "");
}
}
void FitsBlock::initKeySEC(const char* key, Vector& block)
{
if (head_->find(key)) {
char* sec = head_->getString(key);
Vector ll,ur;
parseSection(sec,&ll,&ur);
Matrix mm = Translate(-1,-1) *
Scale(1/block[0],1/block[1]) *
Translate(1,1);
Vector nll = ll*mm;
Vector nur = ur*mm;
ostringstream ostr;
ostr << '[' << int(nll[0]) << ':' << int(nur[0])
<< ',' << int(nll[1]) << ':' << int(nur[1]) << ']' << ends;
head_->setString(key, ostr.str().c_str(), "");
}
}
void FitsBlock::initLTMV(Vector& block)
{
// always do LTMV
double ltv1 = head_->getReal("LTV1", 0);
double ltv2 = head_->getReal("LTV2", 0);
double ltm11 = head_->getReal("LTM1_1", 1);
double ltm12 = head_->getReal("LTM1_2", 0);
double ltm21 = head_->getReal("LTM2_1", 0);
double ltm22 = head_->getReal("LTM2_2", 1);
Matrix mm(ltm11,ltm12,ltm21,ltm22,ltv1,ltv2);
Matrix im = mm *
Translate(-.5,-.5) *
Scale(1./block[0],1./block[1]) *
Translate(.5,.5);
if (head_->find("LTV1"))
head_->setReal("LTV1", im.matrix(2,0), 8, "");
else
head_->appendReal("LTV1", im.matrix(2,0), 8, "");
if (head_->find("LTV2"))
head_->setReal("LTV2", im.matrix(2,1), 8, "");
else
head_->appendReal("LTV2", im.matrix(2,1), 8, "");
if (head_->find("LTM1_1"))
head_->setReal("LTM1_1", ltm11/block[0], 8, "");
else
head_->appendReal("LTM1_1", ltm11/block[0], 8, "");
if (head_->find("LTM1_2"))
head_->setReal("LTM1_2", ltm12, 8, "");
else
head_->appendReal("LTM1_2", ltm12, 8, "");
if (head_->find("LTM2_1"))
head_->setReal("LTM2_1", ltm21, 8, "");
else
head_->appendReal("LTM2_1", ltm21, 8, "");
if (head_->find("LTM2_2"))
head_->setReal("LTM2_2", ltm22/block[1], 8, "");
else
head_->appendReal("LTM2_2", ltm22/block[1], 8, "");
}
void FitsBlock::initWCS(Vector& block)
{
// check for WCS
if (!head_->find("CRPIX1") && !head_->find("CRPIX2"))
return;
double crpix1 = head_->getReal("CRPIX1", 0);
double crpix2 = head_->getReal("CRPIX2", 0);
Matrix pp = Matrix(1,0,0,1,crpix1,crpix2) *
Translate(-.5,-.5) *
Scale(1/block[0],1/block[1]) *
Translate(.5,.5);
if (head_->find("CRPIX1"))
head_->setReal("CRPIX1", pp.matrix(2,0), 8, "");
else
head_->appendReal("CRPIX1", pp.matrix(2,0), 8, "");
if (head_->find("CRPIX2"))
head_->setReal("CRPIX2", pp.matrix(2,1), 8, "");
else
head_->appendReal("CRPIX2", pp.matrix(2,1), 8, "");
// CD
if (head_->find("CD1_1") || head_->find("CD1_2") ||
head_->find("CD2_1") || head_->find("CD2_2")) {
double cd11 = head_->getReal("CD1_1", 1);
double cd12 = head_->getReal("CD1_2", 0);
double cd21 = head_->getReal("CD2_1", 0);
double cd22 = head_->getReal("CD2_2", 1);
Matrix mm = Matrix(cd11,cd12,cd21,cd22,0,0) *
Scale(block[0],block[1]);
if (head_->find("CD1_1"))
head_->setReal("CD1_1", mm.matrix(0,0), 8, "");
else
head_->appendReal("CD1_1", mm.matrix(0,0), 8, "");
if (head_->find("CD1_2"))
head_->setReal("CD1_2", mm.matrix(0,1), 8, "");
else
head_->appendReal("CD1_2", mm.matrix(0,1), 8, "");
if (head_->find("CD2_1"))
head_->setReal("CD2_1", mm.matrix(1,0), 8, "");
else
head_->appendReal("CD2_1", mm.matrix(1,0), 8, "");
if (head_->find("CD2_2"))
head_->setReal("CD2_2", mm.matrix(1,1), 8, "");
else
head_->appendReal("CD2_2", mm.matrix(1,1), 8, "");
}
// CDELT
else if (head_->find("CDELT1") || head_->find("CDELT2")) {
double cdelt1 = head_->getReal("CDELT1", 1);
double cdelt2 = head_->getReal("CDELT2", 0);
Matrix mm = Matrix(cdelt1,0,0,cdelt2,0,0) *
Scale(block[0],block[1]);
if (head_->find("CDELT1"))
head_->setReal("CDELT1", mm.matrix(0,0), 8, "");
else
head_->appendReal("CDELT1", mm.matrix(0,0), 8, "");
if (head_->find("CDELT2"))
head_->setReal("CDELT2", mm.matrix(1,1), 8, "");
else
head_->appendReal("CDELT2", mm.matrix(1,1), 8, "");
}
}
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