/usr/include/mapnik/palette.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_PALETTE_HPP
#define MAPNIK_PALETTE_HPP
// mapnik
#include <mapnik/config.hpp>
#include <mapnik/global.hpp>
#include <mapnik/util/noncopyable.hpp>
#define USE_DENSE_HASH_MAP
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#ifdef USE_DENSE_HASH_MAP
#include <mapnik/sparsehash/dense_hash_map>
using rgba_hash_table = google::dense_hash_map<unsigned int, unsigned char>;
#else
#include <unordered_map>
using rgba_hash_table = std::unordered_map<unsigned int, unsigned char>;
#endif
#pragma GCC diagnostic pop
// stl
#include <vector>
#include <tuple>
#define U2RED(x) ((x)&0xff)
#define U2GREEN(x) (((x)>>8)&0xff)
#define U2BLUE(x) (((x)>>16)&0xff)
#define U2ALPHA(x) (((x)>>24)&0xff)
namespace mapnik {
struct rgba;
struct MAPNIK_DECL rgb
{
std::uint8_t r;
std::uint8_t g;
std::uint8_t b;
inline rgb(std::uint8_t r_, std::uint8_t g_, std::uint8_t b_) : r(r_), g(g_), b(b_) {}
rgb(rgba const& c);
inline bool operator==(const rgb& y) const
{
return r == y.r && g == y.g && b == y.b;
}
};
struct MAPNIK_DECL rgba
{
std::uint8_t r;
std::uint8_t g;
std::uint8_t b;
std::uint8_t a;
inline rgba(std::uint8_t r_, std::uint8_t g_, std::uint8_t b_, std::uint8_t a_)
: r(r_),
g(g_),
b(b_),
a(a_) {}
inline rgba(rgb const& c)
: r(c.r),
g(c.g),
b(c.b),
a(0xFF) {}
inline rgba(unsigned const& c)
: r(U2RED(c)),
g(U2GREEN(c)),
b(U2BLUE(c)),
a(U2ALPHA(c)) {}
inline bool operator==(rgba const& y) const
{
return r == y.r && g == y.g && b == y.b && a == y.a;
}
// ordering by mean(a,r,g,b), a, r, g, b
struct MAPNIK_DECL mean_sort_cmp
{
bool operator() (const rgba& x, const rgba& y) const;
};
inline bool operator<(rgba const& y) const
{
return std::tie(r, g, b, a) < std::tie(y.r, y.g, y.b, y.a);
}
};
class MAPNIK_DECL rgba_palette : private util::noncopyable
{
public:
enum palette_type { PALETTE_RGBA = 0, PALETTE_RGB = 1, PALETTE_ACT = 2 };
explicit rgba_palette(std::string const& pal, palette_type type = PALETTE_RGBA);
rgba_palette();
inline std::vector<rgb> const& palette() const { return rgb_pal_;}
inline std::vector<unsigned> const& alpha_table() const { return alpha_pal_;}
inline std::vector<rgb>& palette() { return rgb_pal_;}
inline std::vector<unsigned>& alpha_table() { return alpha_pal_;}
unsigned char quantize(unsigned c) const;
bool valid() const;
std::string to_string() const;
private:
void parse(std::string const& pal, palette_type type);
private:
std::vector<rgba> sorted_pal_;
mutable rgba_hash_table color_hashmap_;
unsigned colors_;
std::vector<rgb> rgb_pal_;
std::vector<unsigned> alpha_pal_;
};
} // namespace mapnik
#endif // MAPNIK_PALETTE_HPP
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