e7c3d04309
format all files Revert "format all files" This reverts commit 95d5812e49e7f916b68e786596f5a8eb5bcac414. Revert "format some files" This reverts commit ed3c8762d4d828b2b28e7b18809fc33f4f8ccaf5. format all files fix formatting in dir include fix formatting of debug macro
261 lines
8.4 KiB
C++
261 lines
8.4 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) 2021 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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#include "gdal_datasource.hpp"
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#include "gdal_featureset.hpp"
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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/boolean.hpp>
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#include <mapnik/geom_util.hpp>
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#include <mapnik/timer.hpp>
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#include <mapnik/value/types.hpp>
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#include <gdal_version.h>
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#include <mutex>
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using mapnik::datasource;
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using mapnik::parameters;
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DATASOURCE_PLUGIN(gdal_datasource)
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using mapnik::box2d;
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using mapnik::coord2d;
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using mapnik::datasource_exception;
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using mapnik::featureset_ptr;
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using mapnik::layer_descriptor;
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using mapnik::query;
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static std::once_flag once_flag;
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extern "C" MAPNIK_EXP void on_plugin_load()
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{
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// initialize gdal formats
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std::call_once(once_flag, []() { GDALAllRegister(); });
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}
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gdal_datasource::gdal_datasource(parameters const& params)
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: datasource(params)
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, dataset_(nullptr, &GDALClose)
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, desc_(gdal_datasource::name(), "utf-8")
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, nodata_value_(params.get<double>("nodata"))
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, nodata_tolerance_(*params.get<double>("nodata_tolerance", 1e-12))
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{
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource: Initializing...";
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#ifdef MAPNIK_STATS
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mapnik::progress_timer __stats__(std::clog, "gdal_datasource::init");
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#endif
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boost::optional<std::string> file = params.get<std::string>("file");
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if (!file)
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throw datasource_exception("missing <file> parameter");
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boost::optional<std::string> base = params.get<std::string>("base");
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if (base)
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{
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dataset_name_ = *base + "/" + *file;
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}
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else
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{
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dataset_name_ = *file;
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}
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shared_dataset_ = *params.get<mapnik::boolean_type>("shared", false);
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band_ = *params.get<mapnik::value_integer>("band", -1);
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// Maximum memory limitation for image will be simply based on the maximum
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// area we allow for an image. The true memory footprint therefore will vary based
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// on the type of imagery that exists. This is not the maximum size of an image
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// on disk but rather the maximum size we will load into mapnik from GDAL.
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// max_im_area based on 50 mb limit for RGBA
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max_image_area_ = *params.get<mapnik::value_integer>("max_image_area", (50 * 1024 * 1024) / 4);
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#if GDAL_VERSION_NUM >= 1600
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if (shared_dataset_)
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{
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auto ds = GDALOpenShared(dataset_name_.c_str(), GA_ReadOnly);
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dataset_.reset(static_cast<GDALDataset*>(ds));
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}
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else
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#endif
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{
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auto ds = GDALOpen(dataset_name_.c_str(), GA_ReadOnly);
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dataset_.reset(static_cast<GDALDataset*>(ds));
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}
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if (!dataset_)
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{
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throw datasource_exception(CPLGetLastErrorMsg());
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}
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MAPNIK_LOG_DEBUG(gdal) << "gdal_featureset: opened Dataset=" << dataset_.get();
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nbands_ = dataset_->GetRasterCount();
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width_ = dataset_->GetRasterXSize();
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height_ = dataset_->GetRasterYSize();
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desc_.add_descriptor(mapnik::attribute_descriptor("nodata", mapnik::Double));
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double tr[6];
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bool bbox_override = false;
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boost::optional<std::string> bbox_s = params.get<std::string>("extent");
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if (bbox_s)
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{
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource: BBox Parameter=" << *bbox_s;
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bbox_override = extent_.from_string(*bbox_s);
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if (!bbox_override)
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{
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throw datasource_exception("GDAL Plugin: bbox parameter '" + *bbox_s + "' invalid");
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}
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}
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if (bbox_override)
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{
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tr[0] = extent_.minx();
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tr[1] = extent_.width() / (double)width_;
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tr[2] = 0;
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tr[3] = extent_.maxy();
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tr[4] = 0;
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tr[5] = -extent_.height() / (double)height_;
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource extent override gives Geotransform=" << tr[0] << "," << tr[1] << ","
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<< tr[2] << "," << tr[3] << "," << tr[4] << "," << tr[5];
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}
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else
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{
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if (dataset_->GetGeoTransform(tr) != CPLE_None)
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{
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource GetGeotransform failure gives=" << tr[0] << "," << tr[1] << ","
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<< tr[2] << "," << tr[3] << "," << tr[4] << "," << tr[5];
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}
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else
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{
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource Geotransform=" << tr[0] << "," << tr[1] << "," << tr[2] << ","
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<< tr[3] << "," << tr[4] << "," << tr[5];
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}
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}
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// TODO - We should throw for true non-north up images, but the check
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// below is clearly too restrictive.
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// https://github.com/mapnik/mapnik/issues/970
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/*
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if (tr[2] != 0 || tr[4] != 0)
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{
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throw datasource_exception("GDAL Plugin: only 'north up' images are supported");
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}
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*/
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dx_ = tr[1];
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dy_ = tr[5];
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if (!bbox_override)
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{
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double x0 = tr[0];
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double y0 = tr[3];
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double x1 = tr[0] + width_ * dx_ + height_ * tr[2];
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double y1 = tr[3] + width_ * tr[4] + height_ * dy_;
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/*
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double x0 = tr[0] + (height_) * tr[2]; // minx
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double y0 = tr[3] + (height_) * tr[5]; // miny
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double x1 = tr[0] + (width_) * tr[1]; // maxx
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double y1 = tr[3] + (width_) * tr[4]; // maxy
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*/
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extent_.init(x0, y0, x1, y1);
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}
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource: Raster Size=" << width_ << "," << height_;
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MAPNIK_LOG_DEBUG(gdal) << "gdal_datasource: Raster Extent=" << extent_;
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}
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gdal_datasource::~gdal_datasource()
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{
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MAPNIK_LOG_DEBUG(gdal) << "gdal_featureset: Closing Dataset=" << dataset_.get();
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}
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datasource::datasource_t gdal_datasource::type() const
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{
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return datasource::Raster;
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}
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const char* gdal_datasource::name()
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{
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return "gdal";
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}
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box2d<double> gdal_datasource::envelope() const
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{
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return extent_;
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}
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boost::optional<mapnik::datasource_geometry_t> gdal_datasource::get_geometry_type() const
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{
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return boost::optional<mapnik::datasource_geometry_t>();
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}
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layer_descriptor gdal_datasource::get_descriptor() const
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{
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return desc_;
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}
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featureset_ptr gdal_datasource::features(query const& q) const
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{
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#ifdef MAPNIK_STATS
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mapnik::progress_timer __stats__(std::clog, "gdal_datasource::features");
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#endif
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return std::make_shared<gdal_featureset>(*dataset_,
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band_,
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gdal_query(q),
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extent_,
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width_,
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height_,
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nbands_,
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dx_,
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dy_,
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nodata_value_,
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nodata_tolerance_,
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max_image_area_);
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}
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featureset_ptr gdal_datasource::features_at_point(coord2d const& pt, double tol) const
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{
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#ifdef MAPNIK_STATS
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mapnik::progress_timer __stats__(std::clog, "gdal_datasource::features_at_point");
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#endif
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return std::make_shared<gdal_featureset>(*dataset_,
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band_,
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gdal_query(pt),
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extent_,
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width_,
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height_,
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nbands_,
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dx_,
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dy_,
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nodata_value_,
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nodata_tolerance_,
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max_image_area_);
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}
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