/***************************************************************************** * bezier.hpp ***************************************************************************** * Copyright (C) 2003 VideoLAN * $Id: bezier.hpp 9641 2004-12-22 13:06:43Z gbazin $ * * Authors: Cyril Deguet     <asmax@via.ecp.fr> *          Olivier Teuli鑢e <ipkiss@via.ecp.fr> * * 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 for Bezier curvesclass Bezier: public SkinObject{    public:        /// Values to indicate which coordinate(s) must be checked to consider        /// that two points are distinct        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() {}        /// Get the number of control points used to define the curve        int getNbCtrlPoints() const { return m_nbCtrlPt; }        /// Return the percentage (between 0 and 1) of the curve point nearest        /// from (x, y)        float getNearestPercent( int x, int y ) const;        /// Return the distance of (x, y) to the curve        float getMinDist( int x, int y ) const;        /// Get the coordinates of the point at t percent of        /// the curve (t must be between 0 and 1)        void getPoint( float t, int &x, int &y ) const;        /// Get the width (maximum abscissa) of the curve        int getWidth() const;        /// Get the height (maximum ordinate) of the curve        int getHeight() const;    private:        /// Number of control points        int m_nbCtrlPt;        /// vectors containing the coordinates of the control points        vector<float> m_ptx;        vector<float> m_pty;        /// Vector containing precalculated factoriels        vector<float> m_ft;        /// Number of points (=pixels) used by the curve        int m_nbPoints;        /// Vectors with the coordinates of the different points of the curve        vector<int> m_leftVect;        vector<int> m_topVect;        /// Vector with the percentages associated with the points of the curve        vector<float> m_percVect;        /// Return the index of the curve point that is the nearest from (x, y)        int findNearestPoint( int x, int y ) const;        /// Compute the coordinates of a point corresponding to a given        /// percentage        void computePoint( float t, int &x, int &y ) const;        /// Helper function to compute a coefficient of the curve        inline float computeCoeff( int i, int n, float t ) const;        /// x^n        inline float power( float x, int n ) const;};typedef CountedPtr<Bezier> BezierPtr;#endif