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// Copyright (C) 1999-2018
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#include "iis.h"
FitsIIS::FitsIIS(int width, int height)
{
// new header
head_ = new FitsHead(width, height, 1, 8);
if (!head_->isValid())
return;
// alloc memory
size_t size = (size_t)width*height;
data_ = new char[size];
if (!data_)
return;
dataSize_ = size;
dataSkip_ = 0;
// clear memory
memset(data_, '\0', size);
// made it this far, must be valid
valid_ = 1;
}
FitsIIS::~FitsIIS()
{
if (data_)
delete [] (char*)data_;
}
void FitsIIS::erase()
{
// clear memory
FitsImageHDU* hdu = (FitsImageHDU*)head_->hdu();
memset(data_, '\0', hdu->realbytes());
}
char* FitsIIS::get(int xx, int yy, int dx, int dy)
{
// fill-in in reverse order
int ll = dx*dy;
char* dest = new char[ll];
int ww = head_->naxis(0);
int hh = head_->naxis(1);
char* dptr = dest;
char* sptr = (char*)data_ + ((hh-1)-yy)*ww + xx;
while (ll>0) {
memcpy(dptr, sptr, ww);
sptr -= ww;
dptr += ww;
ll -= ww;
}
return dest;
}
void FitsIIS::set(const char* src, int xx, int yy, int dx, int dy)
{
// fill-in in reverse order
int ll = dx*dy;
int ww = head_->naxis(0);
int hh = head_->naxis(1);
char* sptr = (char*)src;
char* dptr = (char*)data_ + ((hh-1)-yy)*ww + xx;
while (ll>0) {
memcpy(dptr, sptr, ww);
sptr += ww;
dptr -= ww;
ll -= ww;
}
}
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