134 lines
3.9 KiB
C++
134 lines
3.9 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2012 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_AGG_HELPERS_HPP
|
|
#define MAPNIK_AGG_HELPERS_HPP
|
|
|
|
// mapnik
|
|
#include <mapnik/gamma_method.hpp>
|
|
#include <mapnik/symbolizer.hpp>
|
|
|
|
|
|
// agg
|
|
#include "agg_gamma_functions.h" // for gamma_power, gamma_linear, etc
|
|
#include "agg_math_stroke.h" // for line_join_e::miter_join, etc
|
|
#include "agg_rasterizer_outline_aa.h"
|
|
|
|
namespace mapnik {
|
|
|
|
template <typename T>
|
|
void set_gamma_method(T & ras_ptr, double gamma, gamma_method_enum method)
|
|
{
|
|
switch (method)
|
|
{
|
|
case GAMMA_POWER:
|
|
ras_ptr->gamma(agg::gamma_power(gamma));
|
|
break;
|
|
case GAMMA_LINEAR:
|
|
ras_ptr->gamma(agg::gamma_linear(0.0, gamma));
|
|
break;
|
|
case GAMMA_NONE:
|
|
ras_ptr->gamma(agg::gamma_none());
|
|
break;
|
|
case GAMMA_THRESHOLD:
|
|
ras_ptr->gamma(agg::gamma_threshold(gamma));
|
|
break;
|
|
case GAMMA_MULTIPLY:
|
|
ras_ptr->gamma(agg::gamma_multiply(gamma));
|
|
break;
|
|
default:
|
|
ras_ptr->gamma(agg::gamma_power(gamma));
|
|
}
|
|
}
|
|
|
|
template <typename Symbolizer, typename PathType, typename Feature>
|
|
void set_join_caps(Symbolizer const& sym, PathType & stroke, Feature const& feature, attributes const& vars)
|
|
{
|
|
line_join_enum join = get<line_join_enum>(sym, keys::stroke_linejoin, feature, vars, MITER_JOIN);
|
|
switch (join)
|
|
{
|
|
case MITER_JOIN:
|
|
stroke.generator().line_join(agg::miter_join);
|
|
break;
|
|
case MITER_REVERT_JOIN:
|
|
stroke.generator().line_join(agg::miter_join);
|
|
break;
|
|
case ROUND_JOIN:
|
|
stroke.generator().line_join(agg::round_join);
|
|
break;
|
|
default:
|
|
stroke.generator().line_join(agg::bevel_join);
|
|
}
|
|
|
|
line_cap_enum cap = get<line_cap_enum>(sym, keys::stroke_linecap, feature, vars, BUTT_CAP);
|
|
|
|
switch (cap)
|
|
{
|
|
case BUTT_CAP:
|
|
stroke.generator().line_cap(agg::butt_cap);
|
|
break;
|
|
case SQUARE_CAP:
|
|
stroke.generator().line_cap(agg::square_cap);
|
|
break;
|
|
default:
|
|
stroke.generator().line_cap(agg::round_cap);
|
|
}
|
|
}
|
|
|
|
|
|
template <typename Symbolizer, typename Rasterizer, typename Feature>
|
|
void set_join_caps_aa(Symbolizer const& sym, Rasterizer & ras, Feature & feature, attributes const& vars)
|
|
{
|
|
line_join_enum join = get<line_join_enum>(sym, keys::stroke_linejoin, feature, vars, MITER_JOIN);
|
|
switch (join)
|
|
{
|
|
case MITER_JOIN:
|
|
ras.line_join(agg::outline_miter_accurate_join);
|
|
break;
|
|
case MITER_REVERT_JOIN:
|
|
ras.line_join(agg::outline_no_join);
|
|
break;
|
|
case ROUND_JOIN:
|
|
ras.line_join(agg::outline_round_join);
|
|
break;
|
|
default:
|
|
ras.line_join(agg::outline_no_join);
|
|
}
|
|
|
|
line_cap_enum cap = get<line_cap_enum>(sym, keys::stroke_linecap, feature, vars, BUTT_CAP);
|
|
|
|
switch (cap)
|
|
{
|
|
case BUTT_CAP:
|
|
ras.round_cap(false);
|
|
break;
|
|
case SQUARE_CAP:
|
|
ras.round_cap(false);
|
|
break;
|
|
default:
|
|
ras.round_cap(true);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
#endif //MAPNIK_AGG_HELPERS_HPP
|