libreoffice/basegfx/source/point/b2ipoint.cxx

/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basegfx.hxx"
#include <basegfx/point/b2ipoint.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>

namespace basegfx
{
    B2IPoint& B2IPoint::operator=( const ::basegfx::B2ITuple& rPoint )
    {
        mnX = rPoint.getX();
        mnY = rPoint.getY();
        return *this;
    }

    B2IPoint& B2IPoint::operator*=( const ::basegfx::B2DHomMatrix& rMat )
    {
        double fTempX(
            rMat.get(0, 0) * mnX +
            rMat.get(0, 1) * mnY +
            rMat.get(0, 2));
        double fTempY(
            rMat.get(1, 0) * mnX +
            rMat.get(1, 1) * mnY +
            rMat.get(1, 2));

        if(!rMat.isLastLineDefault())
        {
            const double fOne(1.0);
            const double fTempM(
                rMat.get(2, 0) * mnX +
                rMat.get(2, 1) * mnY +
                rMat.get(2, 2));

            if(!fTools::equalZero(fTempM) && !fTools::equal(fOne, fTempM))
            {
                fTempX /= fTempM;
                fTempY /= fTempM;
            }
        }

        mnX = fround(fTempX);
        mnY = fround(fTempY);

        return *this;
    }
} // end of namespace basegfx

// eof