/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/

#ifndef KWIN_DEMO_LIQUID_H
#define KWIN_DEMO_LIQUID_H

// Include with base class for effects.
#include <kwineffects.h>

namespace KWin
{

class GLRenderTarget;
class GLTexture;
class GLShader;

/**
 * Turns your desktop into a wavy (liquid) surface
 **/
class LiquidEffect : public Effect
{
public:
    LiquidEffect();
    ~LiquidEffect();

    virtual void prePaintScreen(ScreenPrePaintData& data, int time);
    virtual void postPaintScreen();

    static bool supported();

protected:
    bool loadData();

private:
    GLTexture* mTexture;
    GLRenderTarget* mRenderTarget;
    GLShader* mShader;
    bool mValid;

    double mTime;
};

} // namespace

#endif