/usr/include/mapnik/image_util.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: image_util.hpp 39 2005-04-10 20:39:53Z pavlenko $
#ifndef IMAGE_UTIL_HPP
#define IMAGE_UTIL_HPP
// mapnik
#include <mapnik/config.hpp>
#include <mapnik/graphics.hpp>
#include <mapnik/palette.hpp>
// boost
#include <boost/algorithm/string.hpp>
#include <boost/optional.hpp>
// stl
#include <string>
namespace mapnik {
class Map;
class ImageWriterException : public std::exception
{
private:
std::string message_;
public:
ImageWriterException(const std::string& message)
: message_(message) {}
~ImageWriterException() throw() {}
virtual const char* what() const throw()
{
return message_.c_str();
}
};
#if defined(HAVE_CAIRO)
MAPNIK_DECL void save_to_cairo_file(mapnik::Map const& map,
std::string const& filename,
std::string const& type);
#endif
template <typename T>
MAPNIK_DECL void save_to_file(T const& image,
std::string const& filename,
std::string const& type);
template <typename T>
MAPNIK_DECL void save_to_file(T const& image,
std::string const& filename,
std::string const& type,
rgba_palette const& palette);
// guess type from file extension
template <typename T>
MAPNIK_DECL void save_to_file(T const& image,
std::string const& filename);
template <typename T>
MAPNIK_DECL void save_to_file(T const& image,
std::string const& filename,
rgba_palette const& palette);
template <typename T>
MAPNIK_DECL std::string save_to_string(T const& image,
std::string const& type);
template <typename T>
MAPNIK_DECL std::string save_to_string(T const& image,
std::string const& type,
rgba_palette const& palette);
template <typename T>
void save_as_png(T const& image,
std::string const& filename,
rgba_palette const& palette);
#if defined(HAVE_JPEG)
template <typename T>
void save_as_jpeg(std::string const& filename,
int quality,
T const& image);
#endif
inline bool is_png (std::string const& filename)
{
return boost::algorithm::iends_with(filename,std::string(".png"));
}
inline bool is_jpeg (std::string const& filename)
{
return boost::algorithm::iends_with(filename,std::string(".jpg")) ||
boost::algorithm::iends_with(filename,std::string(".jpeg"));
}
inline bool is_tiff (std::string const& filename)
{
return boost::algorithm::iends_with(filename,std::string(".tif")) ||
boost::algorithm::iends_with(filename,std::string(".tiff"));
}
inline bool is_pdf (std::string const& filename)
{
return boost::algorithm::iends_with(filename,std::string(".pdf"));
}
inline bool is_svg (std::string const& filename)
{
return boost::algorithm::iends_with(filename,std::string(".svg"));
}
inline bool is_ps (std::string const& filename)
{
return boost::algorithm::iends_with(filename,std::string(".ps"));
}
inline boost::optional<std::string> type_from_filename(std::string const& filename)
{
typedef boost::optional<std::string> result_type;
if (is_png(filename)) return result_type("png");
if (is_jpeg(filename)) return result_type("jpeg");
if (is_tiff(filename)) return result_type("tiff");
if (is_pdf(filename)) return result_type("pdf");
if (is_svg(filename)) return result_type("svg");
if (is_ps(filename)) return result_type("ps");
return result_type();
}
inline std::string guess_type( const std::string & filename )
{
std::string::size_type idx = filename.find_last_of(".");
if ( idx != std::string::npos ) {
return filename.substr( idx + 1 );
}
return "<unknown>";
}
template <typename T>
double distance(T x0,T y0,T x1,T y1)
{
double dx = x1-x0;
double dy = y1-y0;
return std::sqrt(dx * dx + dy * dy);
}
// add 1-px border around image - useful for debugging alignment issues
template <typename T>
void add_border(T & image)
{
for (unsigned x = 0; x < image.width();++x)
{
image(x,0) = 0xff0000ff; // red
image(x,image.height()-1) = 0xff00ff00; //green
}
for (unsigned y = 0; y < image.height();++y)
{
image(0,y) = 0xff00ffff; //yellow
image(image.width()-1,y) = 0xffff0000; // blue
}
}
// IMAGE SCALING
enum scaling_method_e
{
SCALING_NEAR=0,
SCALING_BILINEAR=1,
SCALING_BICUBIC=2,
SCALING_SPLINE16=3,
SCALING_SPLINE36=4,
SCALING_HANNING=5,
SCALING_HAMMING=6,
SCALING_HERMITE=7,
SCALING_KAISER=8,
SCALING_QUADRIC=9,
SCALING_CATROM=10,
SCALING_GAUSSIAN=11,
SCALING_BESSEL=12,
SCALING_MITCHELL=13,
SCALING_SINC=14,
SCALING_LANCZOS=15,
SCALING_BLACKMAN=16
};
scaling_method_e get_scaling_method_by_name (std::string name);
template <typename Image>
void scale_image_agg (Image& target,const Image& source, scaling_method_e scaling_method, double scale_factor, double x_off_f=0, double y_off_f=0, double filter_radius=2, double ratio=1);
template <typename Image>
void scale_image_bilinear_old (Image& target,const Image& source, double x_off_f=0, double y_off_f=0);
template <typename Image>
void scale_image_bilinear8 (Image& target,const Image& source, double x_off_f=0, double y_off_f=0);
/////////// save_to_file ////////////////////////////////////////////////
inline MAPNIK_DECL void save_to_file(image_32 const& image,
std::string const& file)
{
save_to_file<image_data_32>(image.data(), file);
}
inline MAPNIK_DECL void save_to_file (image_32 const& image,
std::string const& file,
std::string const& type)
{
save_to_file<image_data_32>(image.data(), file, type);
}
inline MAPNIK_DECL void save_to_file (image_32 const& image,
std::string const& file,
std::string const& type,
rgba_palette const& palette)
{
save_to_file<image_data_32>(image.data(), file, type, palette);
}
//////////////////////////////////////////////////////////////////////////
inline MAPNIK_DECL std::string save_to_string(image_32 const& image,
std::string const& type)
{
return save_to_string<image_data_32>(image.data(), type);
}
inline MAPNIK_DECL std::string save_to_string(image_32 const& image,
std::string const& type,
rgba_palette const& palette)
{
return save_to_string<image_data_32>(image.data(), type, palette);
}
#ifdef _MSC_VER
template MAPNIK_DECL void save_to_file<image_data_32>(image_data_32 const&,
std::string const&,
std::string const&,
rgba_palette const&);
template MAPNIK_DECL void save_to_file<image_data_32>(image_data_32 const&,
std::string const&,
rgba_palette const&);
template MAPNIK_DECL std::string save_to_string<image_data_32>(image_data_32 const&,
std::string const&,
rgba_palette const&);
template MAPNIK_DECL void save_to_file<image_view<image_data_32> > (image_view<image_data_32> const&,
std::string const&,
std::string const&,
rgba_palette const&);
template MAPNIK_DECL void save_to_file<image_view<image_data_32> > (image_view<image_data_32> const&,
std::string const&,
rgba_palette const&);
template MAPNIK_DECL std::string save_to_string<image_view<image_data_32> > (image_view<image_data_32> const&,
std::string const&,
rgba_palette const&);
#endif
}
#endif //IMAGE_UTIL_HPP
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