84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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_IMAGE_READER_HPP
|
|
#define MAPNIK_IMAGE_READER_HPP
|
|
|
|
// mapnik
|
|
#include <mapnik/image_any.hpp>
|
|
#include <mapnik/config.hpp>
|
|
#include <mapnik/util/noncopyable.hpp>
|
|
#include <mapnik/factory.hpp>
|
|
#include <mapnik/box2d.hpp>
|
|
|
|
#pragma GCC diagnostic push
|
|
#include <mapnik/warning_ignore.hpp>
|
|
#include <boost/optional.hpp>
|
|
#pragma GCC diagnostic pop
|
|
|
|
// stl
|
|
#include <stdexcept>
|
|
#include <string>
|
|
|
|
namespace mapnik
|
|
{
|
|
|
|
class image_reader_exception : public std::exception
|
|
{
|
|
private:
|
|
std::string message_;
|
|
public:
|
|
image_reader_exception(std::string const& message)
|
|
: message_(message) {}
|
|
|
|
~image_reader_exception() {}
|
|
|
|
virtual const char* what() const noexcept
|
|
{
|
|
return message_.c_str();
|
|
}
|
|
};
|
|
|
|
struct MAPNIK_DECL image_reader : private util::noncopyable
|
|
{
|
|
virtual unsigned width() const = 0;
|
|
virtual unsigned height() const = 0;
|
|
virtual bool has_alpha() const = 0;
|
|
virtual boost::optional<box2d<double> > bounding_box() const = 0;
|
|
virtual void read(unsigned x,unsigned y,image_rgba8& image) = 0;
|
|
virtual image_any read(unsigned x, unsigned y, unsigned width, unsigned height) = 0;
|
|
virtual ~image_reader() {}
|
|
};
|
|
|
|
template <typename...Args>
|
|
bool register_image_reader(std::string const& type, image_reader* (* fun)(Args...))
|
|
{
|
|
return factory<image_reader,std::string, Args...>::instance().register_product(type, fun);
|
|
}
|
|
|
|
MAPNIK_DECL image_reader* get_image_reader(std::string const& file, std::string const& type);
|
|
MAPNIK_DECL image_reader* get_image_reader(std::string const& file);
|
|
MAPNIK_DECL image_reader* get_image_reader(char const* data, size_t size);
|
|
|
|
}
|
|
|
|
#endif // MAPNIK_IMAGE_READER_HPP
|