/usr/include/mapnik/text/renderer.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_TEXT_RENDERER_HPP
#define MAPNIK_TEXT_RENDERER_HPP
// mapnik
#include <mapnik/text/placement_finder.hpp>
#include <mapnik/image_compositing.hpp>
#include <mapnik/symbolizer_enumerations.hpp>
#include <mapnik/util/noncopyable.hpp>
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#include <agg_trans_affine.h>
// freetype2
extern "C"
{
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_STROKER_H
}
#pragma GCC diagnostic pop
namespace mapnik
{
struct glyph_t
{
FT_Glyph image;
detail::evaluated_format_properties const& properties;
glyph_t(FT_Glyph image_, detail::evaluated_format_properties const& properties_)
: image(image_), properties(properties_) {}
};
class text_renderer : private util::noncopyable
{
public:
text_renderer (halo_rasterizer_e rasterizer,
composite_mode_e comp_op = src_over,
composite_mode_e halo_comp_op = src_over,
double scale_factor = 1.0,
stroker_ptr stroker = stroker_ptr());
void set_comp_op(composite_mode_e comp_op)
{
comp_op_ = comp_op;
}
void set_halo_comp_op(composite_mode_e halo_comp_op)
{
halo_comp_op_ = halo_comp_op;
}
void set_halo_rasterizer(halo_rasterizer_e rasterizer)
{
rasterizer_ = rasterizer;
}
void set_scale_factor(double scale_factor)
{
scale_factor_ = scale_factor;
}
void set_stroker(stroker_ptr stroker)
{
stroker_ = stroker;
}
void set_transform(agg::trans_affine const& transform);
void set_halo_transform(agg::trans_affine const& halo_transform);
protected:
using glyph_vector = std::vector<glyph_t>;
void prepare_glyphs(glyph_positions const& positions);
halo_rasterizer_e rasterizer_;
composite_mode_e comp_op_;
composite_mode_e halo_comp_op_;
double scale_factor_;
glyph_vector glyphs_;
stroker_ptr stroker_;
agg::trans_affine transform_;
agg::trans_affine halo_transform_;
};
template <typename T>
class agg_text_renderer : public text_renderer
{
public:
using pixmap_type = T;
agg_text_renderer (pixmap_type & pixmap, halo_rasterizer_e rasterizer,
composite_mode_e comp_op = src_over,
composite_mode_e halo_comp_op = src_over,
double scale_factor = 1.0,
stroker_ptr stroker = stroker_ptr());
void render(glyph_positions const& positions);
private:
pixmap_type & pixmap_;
void render_halo(FT_Bitmap_ *bitmap, unsigned rgba, int x, int y,
double halo_radius, double opacity,
composite_mode_e comp_op);
};
template <typename T>
class grid_text_renderer : public text_renderer
{
public:
using pixmap_type = T;
grid_text_renderer (pixmap_type & pixmap,
composite_mode_e comp_op = src_over,
double scale_factor = 1.0);
void render(glyph_positions const& positions, value_integer feature_id);
private:
pixmap_type & pixmap_;
void render_halo_id(FT_Bitmap_ *bitmap, mapnik::value_integer feature_id, int x, int y, int halo_radius);
};
}
#endif // RENDERER_HPP
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