/usr/include/mapnik/font_engine_freetype.hpp is in libmapnik-dev 2.2.0+ds1-6build2.
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) 2011 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_FONT_ENGINE_FREETYPE_HPP
#define MAPNIK_FONT_ENGINE_FREETYPE_HPP
// mapnik
#include <mapnik/debug.hpp>
#include <mapnik/color.hpp>
#include <mapnik/utils.hpp>
#include <mapnik/box2d.hpp>
#include <mapnik/ctrans.hpp>
#include <mapnik/geometry.hpp>
#include <mapnik/font_set.hpp>
#include <mapnik/char_info.hpp>
#include <mapnik/image_compositing.hpp>
#include <mapnik/text_symbolizer.hpp>
#include <mapnik/noncopyable.hpp>
#include <mapnik/value_types.hpp>
#include <mapnik/pixel_position.hpp>
// boost
#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>
#include <boost/ptr_container/ptr_vector.hpp>
#include <boost/foreach.hpp>
#ifdef MAPNIK_THREADSAFE
#include <boost/thread/mutex.hpp>
#endif
// stl
#include <string>
#include <vector>
#include <map>
// uci
#include <unicode/unistr.h>
struct FT_LibraryRec_;
namespace mapnik
{
class font_face;
class text_path;
class string_info;
struct char_properties;
class stroker;
struct glyph_t;
typedef boost::shared_ptr<font_face> face_ptr;
class MAPNIK_DECL font_glyph : private mapnik::noncopyable
{
public:
font_glyph(face_ptr face, unsigned index)
: face_(face), index_(index) {}
face_ptr get_face() const
{
return face_;
}
unsigned get_index() const
{
return index_;
}
private:
face_ptr face_;
unsigned index_;
};
typedef boost::shared_ptr<font_glyph> glyph_ptr;
class MAPNIK_DECL font_face_set : private mapnik::noncopyable
{
public:
typedef std::vector<face_ptr> container_type;
typedef container_type::size_type size_type;
font_face_set(void)
: faces_(),
dimension_cache_() {}
void add(face_ptr face);
size_type size() const;
glyph_ptr get_glyph(unsigned c) const;
char_info character_dimensions(unsigned c);
void get_string_info(string_info & info, UnicodeString const& ustr, char_properties *format);
void set_pixel_sizes(unsigned size);
void set_character_sizes(double size);
private:
container_type faces_;
std::map<unsigned, char_info> dimension_cache_;
};
typedef boost::shared_ptr<font_face_set> face_set_ptr;
typedef boost::shared_ptr<stroker> stroker_ptr;
class MAPNIK_DECL freetype_engine
{
public:
static bool is_font_file(std::string const& file_name);
/*! \brief register a font file
* @param file_name path to a font file.
* @return bool - true if at least one face was successfully registered in the file.
*/
static bool register_font(std::string const& file_name);
/*! \brief register a font file
* @param dir - path to a directory containing fonts or subdirectories.
* @param recurse - default false, whether to search for fonts in sub directories.
* @return bool - true if at least one face was successfully registered.
*/
static bool register_fonts(std::string const& dir, bool recurse = false);
static std::vector<std::string> face_names();
static std::map<std::string,std::pair<int,std::string> > const& get_mapping();
face_ptr create_face(std::string const& family_name);
stroker_ptr create_stroker();
virtual ~freetype_engine();
freetype_engine();
private:
FT_LibraryRec_ * library_;
#ifdef MAPNIK_THREADSAFE
static boost::mutex mutex_;
#endif
static std::map<std::string,std::pair<int,std::string> > name2file_;
static std::map<std::string, std::string> memory_fonts_;
};
template <typename T>
class MAPNIK_DECL face_manager : private mapnik::noncopyable
{
typedef T font_engine_type;
typedef std::map<std::string,face_ptr> face_ptr_cache_type;
public:
face_manager(T & engine)
: engine_(engine),
stroker_(engine_.create_stroker()),
face_ptr_cache_() {}
face_ptr get_face(std::string const& name)
{
face_ptr_cache_type::iterator itr;
itr = face_ptr_cache_.find(name);
if (itr != face_ptr_cache_.end())
{
return itr->second;
}
else
{
face_ptr face = engine_.create_face(name);
if (face)
{
face_ptr_cache_.insert(make_pair(name,face));
}
return face;
}
}
face_set_ptr get_face_set(std::string const& name)
{
face_set_ptr face_set = boost::make_shared<font_face_set>();
if (face_ptr face = get_face(name))
{
face_set->add(face);
}
return face_set;
}
face_set_ptr get_face_set(font_set const& fset)
{
std::vector<std::string> const& names = fset.get_face_names();
face_set_ptr face_set = boost::make_shared<font_face_set>();
BOOST_FOREACH( std::string const& name, names)
{
face_ptr face = get_face(name);
if (face)
{
face_set->add(face);
}
#ifdef MAPNIK_LOG
else
{
MAPNIK_LOG_DEBUG(font_engine_freetype)
<< "Failed to find face '" << name
<< "' in font set '" << fset.get_name() << "'\n";
}
#endif
}
return face_set;
}
face_set_ptr get_face_set(std::string const& name, boost::optional<font_set> fset)
{
if (fset && fset->size() > 0)
{
return get_face_set(*fset);
}
else
{
return get_face_set(name);
}
}
inline stroker_ptr get_stroker()
{
return stroker_;
}
private:
font_engine_type & engine_;
stroker_ptr stroker_;
face_ptr_cache_type face_ptr_cache_;
};
template <typename T>
struct text_renderer : private mapnik::noncopyable
{
typedef boost::ptr_vector<glyph_t> glyphs_t;
typedef T pixmap_type;
text_renderer (pixmap_type & pixmap,
face_manager<freetype_engine> & font_manager,
halo_rasterizer_e rasterizer,
composite_mode_e comp_op = src_over,
double scale_factor=1.0);
box2d<double> prepare_glyphs(text_path const& path);
void render(pixel_position const& pos);
void render_id(mapnik::value_integer feature_id,
pixel_position const& pos);
private:
pixmap_type & pixmap_;
face_manager<freetype_engine> & font_manager_;
halo_rasterizer_e rasterizer_;
glyphs_t glyphs_;
composite_mode_e comp_op_;
double scale_factor_;
};
typedef face_manager<freetype_engine> face_manager_freetype;
}
#endif // MAPNIK_FONT_ENGINE_FREETYPE_HPP
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