/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <basegfx/color/bcolormodifier.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace basegfx
{
    ::basegfx::BColor BColorModifier::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
    {
        switch(meMode)
        {
            case BCOLORMODIFYMODE_INTERPOLATE :
            {
                return interpolate(maBColor, aSourceColor, mfValue);
            }
            case BCOLORMODIFYMODE_GRAY :
            {
                const double fLuminance(aSourceColor.luminance());
                return ::basegfx::BColor(fLuminance, fLuminance, fLuminance);
            }
            case BCOLORMODIFYMODE_BLACKANDWHITE :
            {
                const double fLuminance(aSourceColor.luminance());

                if(fLuminance < mfValue)
                {
                    return ::basegfx::BColor::getEmptyBColor();
                }
                else
                {
                    return ::basegfx::BColor(1.0, 1.0, 1.0);
                }
            }
            case BCOLORMODIFYMODE_INVERT :
            {
                return ::basegfx::BColor(1.0 - aSourceColor.getRed(), 1.0 - aSourceColor.getGreen(), 1.0 - aSourceColor.getBlue());
            }
            case BCOLORMODIFYMODE_LUMINANCE_TO_ALPHA:
            {
                const double fAlpha(1.0 - ((aSourceColor.getRed() * 0.2125) + (aSourceColor.getGreen() * 0.7154) + (aSourceColor.getBlue() * 0.0721)));
                return ::basegfx::BColor(fAlpha, fAlpha, fAlpha);
            }
            default : // BCOLORMODIFYMODE_REPLACE
            {
                return maBColor;
            }
        }
    }
} // end of namespace basegfx

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */