vector_tile_raster_clipper.hpp

#ifndef __MAPNIK_VECTOR_TILE_RASTER_CLIPPER_H__
#define __MAPNIK_VECTOR_TILE_RASTER_CLIPPER_H__

// mapnik-vector-tile
#include "vector_tile_config.hpp"

// mapnik
#include <mapnik/geometry/box2d.hpp>
#include <mapnik/image_scaling.hpp>
#include <mapnik/proj_transform.hpp>
#include <mapnik/raster.hpp>

// std
#include <stdexcept>

namespace mapnik
{

namespace vector_tile_impl
{

struct raster_clipper
{
private:
    mapnik::raster const& source_;
    box2d<double> const& target_ext_;
    box2d<double> const& ext_;
    mapnik::proj_transform const& prj_trans_;
    std::string const& image_format_;
    scaling_method_e scaling_method_;
    unsigned width_;
    unsigned height_;
    unsigned raster_width_;
    unsigned raster_height_;
    int start_x_;
    int start_y_;
public:
    raster_clipper(mapnik::raster const& source,
                   box2d<double> const& target_ext,
                   box2d<double> const& ext,
                   mapnik::proj_transform const& prj_trans,
                   std::string const& image_format,
                   scaling_method_e scaling_method,
                   unsigned width,
                   unsigned height,
                   unsigned raster_width,
                   unsigned raster_height,
                   int start_x,
                   int start_y)
        : source_(source),
          target_ext_(target_ext),
          ext_(ext),
          prj_trans_(prj_trans),
          image_format_(image_format),
          scaling_method_(scaling_method),
          width_(width),
          height_(height),
          raster_width_(raster_width),
          raster_height_(raster_height),
          start_x_(start_x),
          start_y_(start_y)
    {
    }

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_rgba8 & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray8 & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray8s & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray16 & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray16s & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray32 & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray32s & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray32f & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray64 & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray64s & source_data);

    MAPNIK_VECTOR_INLINE std::string operator() (mapnik::image_gray64f & source_data);

    std::string operator() (image_null &) const
    {
        throw std::runtime_error("Null data passed to visitor");
    }

};

} // end ns vector_tile_impl

} // end ns mapnik

#if !defined(MAPNIK_VECTOR_TILE_LIBRARY)
#include "vector_tile_raster_clipper.ipp"
#endif

#endif // __MAPNIK_VECTOR_TILE_RASTER_CLIPPER_H__