colormap.hpp

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/* Copyright (c) 2005-2011 Taneli Kalvas. All rights reserved.
 *
 * You can redistribute this software 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 library 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 library (file "COPYING" included in the package);
 * if not, write to the Free Software Foundation, Inc., 51 Franklin
 * Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * If you have questions about your rights to use or distribute this
 * software, please contact Berkeley Lab's Technology Transfer
 * Department at TTD@lbl.gov. Other questions, comments and bug
 * reports should be sent directly to the author via email at
 * taneli.kalvas@jyu.fi.
 * 
 * NOTICE. This software was developed under partial funding from the
 * U.S.  Department of Energy.  As such, the U.S. Government has been
 * granted for itself and others acting on its behalf a paid-up,
 * nonexclusive, irrevocable, worldwide license in the Software to
 * reproduce, prepare derivative works, and perform publicly and
 * display publicly.  Beginning five (5) years after the date
 * permission to assert copyright is obtained from the U.S. Department
 * of Energy, and subject to any subsequent five (5) year renewals,
 * the U.S. Government is granted for itself and others acting on its
 * behalf a paid-up, nonexclusive, irrevocable, worldwide license in
 * the Software to reproduce, prepare derivative works, distribute
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 */

#ifndef COLORMAP_HPP
#define COLORMAP_HPP 1


#include <cairo.h>
#include <vector>
#include "palette.hpp"
#include "graph.hpp"
#include "coordmapper.hpp"
#include "interpolation.hpp"



enum interpolation_e {
    INTERPOLATION_CLOSEST = 0,
    INTERPOLATION_BILINEAR,
    INTERPOLATION_BICUBIC
};


enum zscale_e {
    ZSCALE_LINEAR = 0,
    ZSCALE_LOG,
    ZSCALE_RELLOG
};


class Colormap : public Graph {

    Palette                _palette;       
    interpolation_e        _interpolation; 
    zscale_e               _zscale;        
    double                 _zmin;          
    double                 _zmax;          
    double                 _datarange[4];  
    size_t                 _n;             
    size_t                 _m;             
    std::vector<double>    _f;             
    Interpolation2D       *_intrp;         
    void make_data_interpolation( void );
    
    void plot_to_image_surface( cairo_surface_t *surface, const Coordmapper *cm, int plim[4] );

public:

    Colormap();

    Colormap( const Colormap &colormap );

    Colormap( const double datarange[4], size_t n, size_t m, 
              const std::vector<double> &data );

    virtual ~Colormap();

    void clear_data( void );
                   
    void set_data( const double datarange[4], size_t n, size_t m, 
                   const std::vector<double> &data );

    interpolation_e get_interpolation( void ) const;

    void set_interpolation( interpolation_e interpolation );

    zscale_e get_zscale( void ) const;

    void set_zscale( zscale_e zscale );

    virtual void plot( cairo_t *cairo, const Coordmapper *cm, const double range[4] );

    virtual void plot_sample( cairo_t *cairo, double x, double y, double width, double height );

    virtual void get_bbox( double bbox[4] );

    void set_palette( const Palette &palette );

    Palette &palette( void ) { return( _palette ); }

    void get_zrange( double &min, double &max ) const;

    void set_zrange( double min, double max );

    double get_value( double x, double y ) const;
};


#endif