326 lines
9.2 KiB
C++
326 lines
9.2 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef RASTER_FEATURESET_HPP
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#define RASTER_FEATURESET_HPP
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#include "raster_datasource.hpp"
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#include "raster_info.hpp"
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// mapnik
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#include <mapnik/debug.hpp>
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// stl
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#include <vector>
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// boost
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#include <boost/utility.hpp>
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#include <boost/format.hpp>
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class single_file_policy
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{
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raster_info info_;
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public:
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class const_iterator
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{
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enum iterator_e {start,end};
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bool status_;
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const single_file_policy* p_;
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public:
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explicit const_iterator(const single_file_policy* p)
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: status_(start),
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p_(p) {}
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const_iterator()
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: status_(end) {}
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const_iterator(const const_iterator& other)
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: status_(other.status_),
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p_(other.p_) {}
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const_iterator& operator++()
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{
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status_ = end;
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return *this;
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}
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const raster_info& operator*() const
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{
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return p_->info_;
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}
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const raster_info* operator->() const
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{
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return &(p_->info_);
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}
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bool operator!=(const const_iterator& itr)
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{
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return status_ != itr.status_;
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}
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};
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explicit single_file_policy(const raster_info& info)
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: info_(info) {}
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const_iterator begin()
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{
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return const_iterator(this);
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}
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const_iterator query(const box2d<double>& box)
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{
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if (box.intersects(info_.envelope()))
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{
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return begin();
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}
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return end();
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}
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const_iterator end()
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{
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return const_iterator();
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}
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inline int img_width(int reader_width) const
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{
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return reader_width;
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}
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inline int img_height(int reader_height) const
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{
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return reader_height;
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}
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inline box2d<double> transform(box2d<double> &) const
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{
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return box2d<double>(0, 0, 0, 0);
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}
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};
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class tiled_file_policy
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{
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public:
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typedef std::vector<raster_info>::const_iterator const_iterator;
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tiled_file_policy(std::string const& file,
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std::string const& format,
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unsigned tile_size,
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box2d<double> extent,
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box2d<double> bbox,
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unsigned width,
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unsigned height)
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{
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double lox = extent.minx();
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double loy = extent.miny();
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int max_x = int(std::ceil(double(width) / double(tile_size)));
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int max_y = int(std::ceil(double(height) / double(tile_size)));
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double pixel_x = extent.width() / double(width);
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double pixel_y = extent.height() / double(height);
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MAPNIK_LOG_DEBUG(raster) << "tiled_file_policy: Raster Plugin PIXEL SIZE("<< pixel_x << "," << pixel_y << ")";
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box2d<double> e = bbox.intersect(extent);
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for (int x = 0; x < max_x; ++x)
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{
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for (int y = 0; y < max_y; ++y)
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{
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double x0 = lox + x * tile_size * pixel_x;
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double y0 = loy + y * tile_size * pixel_y;
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double x1 = x0 + tile_size * pixel_x;
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double y1 = y0 + tile_size * pixel_y;
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if (e.intersects(box2d<double>(x0, y0, x1, y1)))
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{
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box2d<double> tile_box = e.intersect(box2d<double>(x0,y0,x1,y1));
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raster_info info(file,format,tile_box,tile_size,tile_size);
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infos_.push_back(info);
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}
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}
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}
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MAPNIK_LOG_DEBUG(raster) << "tiled_file_policy: Raster Plugin INFO SIZE=" << infos_.size() << " " << file;
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}
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const_iterator begin()
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{
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return infos_.begin();
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}
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const_iterator end()
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{
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return infos_.end();
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}
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inline int img_width(int reader_width) const
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{
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return reader_width;
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}
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inline int img_height(int reader_height) const
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{
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return reader_height;
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}
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inline box2d<double> transform(box2d<double>&) const
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{
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return box2d<double>(0, 0, 0, 0);
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}
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private:
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std::vector<raster_info> infos_;
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};
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class tiled_multi_file_policy
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{
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public:
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typedef std::vector<raster_info>::const_iterator const_iterator;
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tiled_multi_file_policy(std::string const& file_pattern,
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std::string const& format,
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unsigned tile_size,
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box2d<double> extent,
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box2d<double> bbox,
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unsigned width,
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unsigned height,
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unsigned tile_stride)
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: image_width_(width),
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image_height_(height),
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tile_size_(tile_size),
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tile_stride_(tile_stride)
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{
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double lox = extent.minx();
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double loy = extent.miny();
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//int max_x = int(std::ceil(double(width) / double(tile_size)));
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//int max_y = int(std::ceil(double(height) / double(tile_size)));
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double pixel_x = extent.width() / double(width);
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double pixel_y = extent.height() / double(height);
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MAPNIK_LOG_DEBUG(raster) << "tiled_multi_file_policy: Raster Plugin PIXEL SIZE(" << pixel_x << "," << pixel_y << ")";
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// intersection of query with extent => new query
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box2d<double> e = bbox.intersect(extent);
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const int x_min = int(std::floor((e.minx() - lox) / (tile_size * pixel_x)));
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const int y_min = int(std::floor((e.miny() - loy) / (tile_size * pixel_y)));
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const int x_max = int(std::ceil((e.maxx() - lox) / (tile_size * pixel_x)));
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const int y_max = int(std::ceil((e.maxy() - loy) / (tile_size * pixel_y)));
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for (int x = x_min; x < x_max; ++x)
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{
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for (int y = y_min; y < y_max; ++y)
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{
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// x0, y0, x1, y1 => projection-space image coordinates.
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double x0 = lox + x*tile_size*pixel_x;
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double y0 = loy + y*tile_size*pixel_y;
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double x1 = x0 + tile_size*pixel_x;
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double y1 = y0 + tile_size*pixel_y;
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// check if it intersects the query
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if (e.intersects(box2d<double>(x0,y0,x1,y1)))
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{
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// tile_box => intersection of tile with query in projection-space.
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box2d<double> tile_box = e.intersect(box2d<double>(x0,y0,x1,y1));
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std::string file = interpolate(file_pattern, x, y);
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raster_info info(file,format,tile_box,tile_size,tile_size);
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infos_.push_back(info);
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}
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}
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}
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MAPNIK_LOG_DEBUG(raster) << "tiled_multi_file_policy: Raster Plugin INFO SIZE=" << infos_.size() << " " << file_pattern;
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}
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const_iterator begin()
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{
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return infos_.begin();
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}
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const_iterator end()
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{
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return infos_.end();
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}
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inline int img_width(int) const
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{
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return image_width_;
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}
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inline int img_height(int) const
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{
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return image_height_;
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}
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inline box2d<double> transform(box2d<double>& box) const
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{
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int x_offset = int(std::floor(box.minx() / tile_size_));
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int y_offset = int(std::floor(box.miny() / tile_size_));
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box2d<double> rem(x_offset * tile_size_,
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y_offset * tile_size_,
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x_offset * tile_size_,
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y_offset * tile_size_);
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box.init(box.minx() - rem.minx(),
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box.miny() - rem.miny(),
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box.maxx() - rem.maxx(),
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box.maxy() - rem.maxy());
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return rem;
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}
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private:
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std::string interpolate(std::string const& pattern, int x, int y) const;
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unsigned int image_width_, image_height_, tile_size_, tile_stride_;
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std::vector<raster_info> infos_;
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};
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template <typename LookupPolicy>
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class raster_featureset : public mapnik::Featureset
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{
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typedef typename LookupPolicy::const_iterator iterator_type;
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public:
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raster_featureset(LookupPolicy const& policy,
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box2d<double> const& exttent,
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mapnik::query const& q);
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virtual ~raster_featureset();
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mapnik::feature_ptr next();
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private:
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LookupPolicy policy_;
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int feature_id_;
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mapnik::context_ptr ctx_;
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mapnik::box2d<double> extent_;
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mapnik::box2d<double> bbox_;
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iterator_type curIter_;
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iterator_type endIter_;
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};
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#endif // RASTER_FEATURESET_HPP
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