217 lines
7.1 KiB
C++
217 lines
7.1 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
// boost
|
|
|
|
// mapnik
|
|
#include <mapnik/util/fs.hpp>
|
|
#include <mapnik/debug.hpp>
|
|
#include <mapnik/ctrans.hpp>
|
|
#include <mapnik/image_util.hpp>
|
|
#include <mapnik/image_reader.hpp>
|
|
#include <mapnik/boolean.hpp>
|
|
|
|
#include "raster_featureset.hpp"
|
|
#include "raster_info.hpp"
|
|
#include "raster_datasource.hpp"
|
|
|
|
using mapnik::layer_descriptor;
|
|
using mapnik::featureset_ptr;
|
|
using mapnik::query;
|
|
using mapnik::coord2d;
|
|
using mapnik::datasource_exception;
|
|
using mapnik::datasource;
|
|
using mapnik::parameters;
|
|
using mapnik::image_reader;
|
|
|
|
DATASOURCE_PLUGIN(raster_datasource)
|
|
|
|
raster_datasource::raster_datasource(parameters const& params)
|
|
: datasource(params),
|
|
desc_(raster_datasource::name(), "utf-8"),
|
|
extent_initialized_(false)
|
|
{
|
|
MAPNIK_LOG_DEBUG(raster) << "raster_datasource: Initializing...";
|
|
|
|
boost::optional<std::string> file = params.get<std::string>("file");
|
|
if (! file) throw datasource_exception("Raster Plugin: missing <file> parameter ");
|
|
|
|
boost::optional<std::string> base = params.get<std::string>("base");
|
|
if (base)
|
|
filename_ = *base + "/" + *file;
|
|
else
|
|
filename_ = *file;
|
|
|
|
multi_tiles_ = *params.get<mapnik::boolean>("multi", false);
|
|
tile_size_ = *params.get<mapnik::value_integer>("tile_size", 256);
|
|
tile_stride_ = *params.get<mapnik::value_integer>("tile_stride", 1);
|
|
|
|
boost::optional<std::string> format_from_filename = mapnik::type_from_filename(*file);
|
|
format_ = *params.get<std::string>("format",format_from_filename?(*format_from_filename) : "tiff");
|
|
|
|
boost::optional<mapnik::value_double> lox = params.get<mapnik::value_double>("lox");
|
|
boost::optional<mapnik::value_double> loy = params.get<mapnik::value_double>("loy");
|
|
boost::optional<mapnik::value_double> hix = params.get<mapnik::value_double>("hix");
|
|
boost::optional<mapnik::value_double> hiy = params.get<mapnik::value_double>("hiy");
|
|
|
|
boost::optional<std::string> ext = params.get<std::string>("extent");
|
|
|
|
if (lox && loy && hix && hiy)
|
|
{
|
|
extent_.init(*lox, *loy, *hix, *hiy);
|
|
extent_initialized_ = true;
|
|
}
|
|
else if (ext)
|
|
{
|
|
extent_initialized_ = extent_.from_string(*ext);
|
|
}
|
|
|
|
if (! extent_initialized_)
|
|
{
|
|
throw datasource_exception("Raster Plugin: valid <extent> or <lox> <loy> <hix> <hiy> are required");
|
|
}
|
|
|
|
if (multi_tiles_)
|
|
{
|
|
boost::optional<mapnik::value_integer> x_width = params.get<mapnik::value_integer>("x_width");
|
|
boost::optional<mapnik::value_integer> y_width = params.get<mapnik::value_integer>("y_width");
|
|
|
|
if (! x_width)
|
|
{
|
|
throw datasource_exception("Raster Plugin: x-width parameter not supplied for multi-tiled data source.");
|
|
}
|
|
|
|
if (! y_width)
|
|
{
|
|
throw datasource_exception("Raster Plugin: y-width parameter not supplied for multi-tiled data source.");
|
|
}
|
|
|
|
width_ = x_width.get() * tile_size_;
|
|
height_ = y_width.get() * tile_size_;
|
|
}
|
|
else
|
|
{
|
|
if (!mapnik::util::exists(filename_))
|
|
{
|
|
throw datasource_exception("Raster Plugin: " + filename_ + " does not exist");
|
|
}
|
|
|
|
try
|
|
{
|
|
std::unique_ptr<image_reader> reader(mapnik::get_image_reader(filename_, format_));
|
|
if (reader.get())
|
|
{
|
|
width_ = reader->width();
|
|
height_ = reader->height();
|
|
}
|
|
}
|
|
catch (mapnik::image_reader_exception const& ex)
|
|
{
|
|
throw datasource_exception("Raster Plugin: image reader exception: " + std::string(ex.what()));
|
|
}
|
|
catch (std::exception const& ex)
|
|
{
|
|
throw datasource_exception("Raster Plugin: " + std::string(ex.what()));
|
|
}
|
|
catch (...)
|
|
{
|
|
throw datasource_exception("Raster Plugin: image reader unknown exception caught");
|
|
}
|
|
}
|
|
|
|
MAPNIK_LOG_DEBUG(raster) << "raster_datasource: Raster size=" << width_ << "," << height_;
|
|
|
|
}
|
|
|
|
raster_datasource::~raster_datasource()
|
|
{
|
|
}
|
|
|
|
mapnik::datasource::datasource_t raster_datasource::type() const
|
|
{
|
|
return datasource::Raster;
|
|
}
|
|
|
|
const char * raster_datasource::name()
|
|
{
|
|
return "raster";
|
|
}
|
|
|
|
mapnik::box2d<double> raster_datasource::envelope() const
|
|
{
|
|
return extent_;
|
|
}
|
|
|
|
boost::optional<mapnik::datasource::geometry_t> raster_datasource::get_geometry_type() const
|
|
{
|
|
return boost::optional<mapnik::datasource::geometry_t>();
|
|
}
|
|
|
|
layer_descriptor raster_datasource::get_descriptor() const
|
|
{
|
|
return desc_;
|
|
}
|
|
|
|
featureset_ptr raster_datasource::features(query const& q) const
|
|
{
|
|
mapnik::CoordTransform t(width_, height_, extent_, 0, 0);
|
|
mapnik::box2d<double> intersect = extent_.intersect(q.get_bbox());
|
|
mapnik::box2d<double> ext = t.forward(intersect);
|
|
|
|
const int width = int(ext.maxx() + 0.5) - int(ext.minx() + 0.5);
|
|
const int height = int(ext.maxy() + 0.5) - int(ext.miny() + 0.5);
|
|
|
|
MAPNIK_LOG_DEBUG(raster) << "raster_datasource: Box size=" << width << "," << height;
|
|
|
|
if (multi_tiles_)
|
|
{
|
|
MAPNIK_LOG_DEBUG(raster) << "raster_datasource: Multi-Tiled policy";
|
|
|
|
tiled_multi_file_policy policy(filename_, format_, tile_size_, extent_, q.get_bbox(), width_, height_, tile_stride_);
|
|
|
|
return std::make_shared<raster_featureset<tiled_multi_file_policy> >(policy, extent_, q);
|
|
}
|
|
else if (width * height > static_cast<int>(tile_size_ * tile_size_ << 2))
|
|
{
|
|
MAPNIK_LOG_DEBUG(raster) << "raster_datasource: Tiled policy";
|
|
|
|
tiled_file_policy policy(filename_, format_, tile_size_, extent_, q.get_bbox(), width_, height_);
|
|
|
|
return std::make_shared<raster_featureset<tiled_file_policy> >(policy, extent_, q);
|
|
}
|
|
else
|
|
{
|
|
MAPNIK_LOG_DEBUG(raster) << "raster_datasource: Single file";
|
|
|
|
raster_info info(filename_, format_, extent_, width_, height_);
|
|
single_file_policy policy(info);
|
|
|
|
return std::make_shared<raster_featureset<single_file_policy> >(policy, extent_, q);
|
|
}
|
|
}
|
|
|
|
featureset_ptr raster_datasource::features_at_point(coord2d const&, double tol) const
|
|
{
|
|
MAPNIK_LOG_WARN(raster) << "raster_datasource: feature_at_point not supported";
|
|
|
|
return featureset_ptr();
|
|
}
|