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

Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>

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_SHOWFPS_H
#define KWIN_SHOWFPS_H

#include <kwineffects.h>
#include <kwinglutils.h>

#include <QDateTime>

namespace KWin
{

class ShowFpsEffect
    : public Effect
    {
    public:
        ShowFpsEffect();
        virtual void reconfigure( ReconfigureFlags );
        virtual void prePaintScreen( ScreenPrePaintData& data, int time );
        virtual void paintScreen( int mask, QRegion region, ScreenPaintData& data );
        virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
        virtual void postPaintScreen();
        enum { INSIDE_GRAPH, NOWHERE, TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT }; // fps text position
    private:
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
        void paintGL( int fps );
#endif
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
        void paintXrender( int fps );
#endif
        void paintFPSGraph(int x, int y);
        void paintDrawSizeGraph(int x, int y);
        void paintGraph( int x, int y, QList<int> values, QList<int> lines, bool colorize);
        void paintFPSText(int fps);
        QTime t;
        enum { NUM_PAINTS = 100 }; // remember time needed to paint this many paints
        int paints[ NUM_PAINTS ]; // time needed to paint
        int paint_size[ NUM_PAINTS ]; // number of pixels painted
        int paints_pos;  // position in the queue
        enum { MAX_FPS = 200 };
        int frames[ MAX_FPS ]; // (sec*1000+msec) of the time the frame was done
        int frames_pos; // position in the queue
        double alpha;
        int x;
        int y;
        QRect fps_rect;
#ifdef KWIN_HAVE_OPENGL_COMPOSITING
        GLTexture *fpsText;
#endif
        int textPosition;
        QFont textFont;
        QColor textColor;
        QRect fpsTextRect;
        int textAlign;
    };

} // namespace

#endif