107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2014 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_GRADIENT_HPP
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#define MAPNIK_GRADIENT_HPP
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// agg
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#include <agg_trans_affine.h>
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// mapnik
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#include <mapnik/color.hpp>
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#include <mapnik/enumeration.hpp>
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// stl
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#include <vector>
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namespace mapnik
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{
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using stop_pair = std::pair<double, mapnik::color>;
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using stop_array = std::vector<stop_pair >;
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enum gradient_enum
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{
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NO_GRADIENT,
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LINEAR,
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RADIAL,
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gradient_enum_MAX
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};
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DEFINE_ENUM( gradient_e, gradient_enum );
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enum gradient_unit_enum
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{
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USER_SPACE_ON_USE,
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USER_SPACE_ON_USE_BOUNDING_BOX, // used to indicate % age values were specified. This are % of the svg image extent.
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OBJECT_BOUNDING_BOX, // (i.e., the abstract coordinate system where (0,0) is at the top/left of the object bounding box and (1,1) is at the bottom/right of the object bounding box)
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gradient_unit_enum_MAX
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};
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DEFINE_ENUM( gradient_unit_e, gradient_unit_enum );
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class MAPNIK_DECL gradient
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{
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// transform
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agg::trans_affine transform_;
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// control points for the gradient, x1/y1 is the start point, x2/y2 the stop point.
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double x1_;
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double y1_;
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double x2_;
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double y2_;
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// for radial gradients r specifies the radius of the stop circle centered on x2/y2
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double r_;
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stop_array stops_;
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// units for the coordinates
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gradient_unit_e units_;
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gradient_e gradient_type_;
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public:
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gradient();
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gradient(gradient const& other);
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gradient& operator=(const gradient& rhs);
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void set_gradient_type(gradient_e grad);
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gradient_e get_gradient_type() const;
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void set_transform(agg::trans_affine const& transform);
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agg::trans_affine const& get_transform() const;
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void set_units(gradient_unit_e units);
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gradient_unit_e get_units() const;
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void add_stop(double offset, color const& c);
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bool has_stop() const;
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stop_array const& get_stop_array() const;
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void set_control_points(double x1, double y1, double x2, double y2, double r=0);
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void get_control_points(double &x1, double &y1, double &x2, double &y2, double &r) const;
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void get_control_points(double &x1, double &y1, double &x2, double &y2) const;
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private:
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void swap(const gradient& other) throw();
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};
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}
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#endif // MAPNIK_GRADIENT_HPP
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