/usr/include/mapnik/palette.hpp is in libmapnik2-dev 2.0.0+ds1-3build1.
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) 2006 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
*
*****************************************************************************/
//$Id$
#ifndef _PALETTE_HPP_
#define _PALETTE_HPP_
// mapnik
#include <mapnik/global.hpp>
#include <mapnik/config_error.hpp>
// boost
#include <boost/utility.hpp>
#include <boost/unordered_map.hpp>
// stl
#include <vector>
#include <map>
#include <iostream>
#include <set>
#include <algorithm>
#include <cmath>
#ifdef MAPNIK_BIG_ENDIAN
#define U2RED(x) (((x)>>24)&0xff)
#define U2GREEN(x) (((x)>>16)&0xff)
#define U2BLUE(x) (((x)>>8)&0xff)
#define U2ALPHA(x) ((x)&0xff)
#else
#define U2RED(x) ((x)&0xff)
#define U2GREEN(x) (((x)>>8)&0xff)
#define U2BLUE(x) (((x)>>16)&0xff)
#define U2ALPHA(x) (((x)>>24)&0xff)
#endif
namespace mapnik {
typedef boost::uint8_t byte;
struct rgba;
struct rgb {
byte r;
byte g;
byte b;
inline rgb(byte r_, byte g_, byte 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 rgba
{
byte r;
byte g;
byte b;
byte a;
inline rgba(byte r_, byte g_, byte b_, byte 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==(const rgba& y) const
{
return r == y.r && g == y.g && b == y.b && a == y.a;
}
inline operator unsigned() const
{
#ifdef MAPNIK_BIG_ENDIAN
return (r << 24) | (g << 16) | (b << 8) | a;
#else
return r | (g << 8) | (b << 16) | (a << 24);
#endif
}
// ordering by mean(a,r,g,b), a, r, g, b
struct mean_sort_cmp
{
bool operator() (const rgba& x, const rgba& y) const;
};
struct hash_func : public std::unary_function<rgba, std::size_t>
{
std::size_t operator()(rgba const& p) const;
};
};
typedef boost::unordered_map<unsigned, unsigned> rgba_hash_table;
class rgba_palette : private boost::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();
const std::vector<rgb>& palette() const;
const std::vector<unsigned>& alphaTable() const;
unsigned quantize(rgba const& c) const;
inline unsigned quantize(unsigned const& c) const
{
rgba_hash_table::const_iterator it = color_hashmap_.find(c);
if (it != color_hashmap_.end())
{
return it->second;
}
else {
return quantize(rgba(U2RED(c), U2GREEN(c), U2BLUE(c), U2ALPHA(c)));
}
}
bool valid() 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 // _PALETTE_HPP_
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