/usr/include/mapnik/gradient.hpp is in libmapnik-dev 3.0.12+ds-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_GRADIENT_HPP
#define MAPNIK_GRADIENT_HPP
#pragma GCC diagnostic push
#include <mapnik/warning_ignore_agg.hpp>
#include <agg_trans_affine.h>
#pragma GCC diagnostic pop
// mapnik
#include <mapnik/color.hpp>
// stl
#include <vector>
namespace mapnik
{
using stop_pair = std::pair<double, mapnik::color>;
using stop_array = std::vector<stop_pair >;
enum gradient_e
{
NO_GRADIENT,
LINEAR,
RADIAL
};
enum gradient_unit_e
{
USER_SPACE_ON_USE,
USER_SPACE_ON_USE_BOUNDING_BOX, // used to indicate % age values were specified. This are % of the svg image extent.
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)
};
class MAPNIK_DECL gradient
{
// transform
agg::trans_affine transform_;
// control points for the gradient, x1/y1 is the start point, x2/y2 the stop point.
double x1_;
double y1_;
double x2_;
double y2_;
// for radial gradients r specifies the radius of the stop circle centered on x2/y2
double r_;
stop_array stops_;
// units for the coordinates
gradient_unit_e units_;
gradient_e gradient_type_;
public:
gradient();
gradient(gradient const& other);
gradient(gradient && other);
gradient& operator=(gradient rhs);
bool operator==(gradient const& other) const;
void set_gradient_type(gradient_e grad);
gradient_e get_gradient_type() const;
void set_transform(agg::trans_affine const& transform);
agg::trans_affine const& get_transform() const;
void set_units(gradient_unit_e units);
gradient_unit_e get_units() const;
void add_stop(double offset, color const& c);
bool has_stop() const;
stop_array const& get_stop_array() const;
void set_control_points(double x1, double y1, double x2, double y2, double r=0);
void get_control_points(double &x1, double &y1, double &x2, double &y2, double &r) const;
void get_control_points(double &x1, double &y1, double &x2, double &y2) const;
private:
void swap(gradient& other) throw();
};
}
#endif // MAPNIK_GRADIENT_HPP
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