//# ImageMask.cc
//# Copyright (C) 1998,1999,2000,2001
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//#        Internet email: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
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//#

#include <imageanalysis/ImageAnalysis/ImageMask.h>

#include <casacore/lattices/Lattices/MaskedLatticeIterator.h>

namespace casa {

template <class T> casacore::Bool ImageMask::isAllMaskFalse(const casacore::ImageInterface<T>& image) {
	if (! image.isMasked() && ! image.hasPixelMask()) {
		return false;
	}
	auto cursorShape = image.niceCursorShape(4096*4096);
	casacore::LatticeStepper stepper(image.shape(), cursorShape, casacore::LatticeStepper::RESIZE);
	casacore::RO_MaskedLatticeIterator<T> iter(image, stepper);
	for (iter.reset(); ! iter.atEnd(); ++iter) {
		auto cursorShape = iter.cursorShape();
		auto mymask = iter.getMask();
		if (anyTrue(mymask)) {
			return false;
		}
	}
	return true;
}

template <class T> casacore::Bool ImageMask::isAllMaskTrue(
	const casacore::MaskedLattice<T>& image
) {
	if (! image.isMasked()) {
		return true;
	}
	auto cursorShape = image.niceCursorShape(4096*4096);
	casacore::LatticeStepper stepper(image.shape(), cursorShape, casacore::LatticeStepper::RESIZE);
	casacore::RO_MaskedLatticeIterator<T> iter(image, stepper);
	for (iter.reset(); ! iter.atEnd(); ++iter) {
		auto mymask = iter.getMask();
		if (! allTrue(mymask)) {
			return false;
		}
	}
	return true;
}

}