bezier.hpp

/*****************************************************************************
 * bezier.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: bezier.hpp 11664 2005-07-09 06:17:09Z courmisch $
 *
 * Authors: Cyril Deguet     <[email protected]>
 *          Olivier Teulière <[email protected]>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#ifndef BEZIER_HPP
#define BEZIER_HPP

#include "../src/skin_common.hpp"
#include "pointer.hpp"
#include <vector>

#define MAX_BEZIER_POINT 1023


class Bezier: public SkinObject
{
    public:
        typedef enum
        {
            kCoordsBoth,    // x or y must be different (default)
            kCoordsX,       // only x is different
            kCoordsY        // only y is different
        } Flag_t;

        Bezier( intf_thread_t *p_intf,
                const vector<float> &pAbscissas,
                const vector<float> &pOrdinates,
                Flag_t flag = kCoordsBoth );
        ~Bezier() {}

        int getNbCtrlPoints() const { return m_nbCtrlPt; }

        float getNearestPercent( int x, int y ) const;

        float getMinDist( int x, int y ) const;

        void getPoint( float t, int &x, int &y ) const;

        int getWidth() const;

        int getHeight() const;

    private:
        int m_nbCtrlPt;
        vector<float> m_ptx;
        vector<float> m_pty;
        vector<float> m_ft;

        int m_nbPoints;
        vector<int> m_leftVect;
        vector<int> m_topVect;
        vector<float> m_percVect;

        int findNearestPoint( int x, int y ) const;
        void computePoint( float t, int &x, int &y ) const;
        inline float computeCoeff( int i, int n, float t ) const;
        inline float power( float x, int n ) const;
};


typedef CountedPtr<Bezier> BezierPtr;

#endif

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