88 lines
2.6 KiB
C++
88 lines
2.6 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) 2024 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 "catch.hpp"
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#include <mapnik/datasource.hpp>
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#include <mapnik/datasource_cache.hpp>
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#include <mapnik/raster.hpp>
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#include <mapnik/util/fs.hpp>
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namespace {
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mapnik::datasource_ptr get_gdal_ds(std::string const& file_name, std::optional<mapnik::value_integer> band)
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{
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const bool have_gdal_plugin = mapnik::datasource_cache::instance().plugin_registered("gdal");
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if (!have_gdal_plugin)
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{
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return mapnik::datasource_ptr();
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}
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mapnik::parameters params;
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params["type"] = std::string("gdal");
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params["file"] = file_name;
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if (band)
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{
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params["band"] = *band;
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}
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auto ds = mapnik::datasource_cache::instance().create(params);
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REQUIRE(ds != nullptr);
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return ds;
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}
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} // anonymous namespace
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TEST_CASE("gdal")
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{
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SECTION("upsampling")
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{
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std::string dataset = "test/data/tiff/ndvi_256x256_gray32f_tiled.tif";
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mapnik::datasource_ptr ds = get_gdal_ds(dataset, 1);
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if (!ds)
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{
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// GDAL plugin not built.
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return;
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}
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mapnik::box2d<double> envelope = ds->envelope();
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CHECK(envelope.width() == 256);
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CHECK(envelope.height() == 256);
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// Indicate four times bigger resolution.
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mapnik::query::resolution_type resolution(2.0, 2.0);
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mapnik::query query(envelope, resolution, 1.0);
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auto features = ds->features(query);
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auto feature = features->next();
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mapnik::raster_ptr raster = feature->get_raster();
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REQUIRE(raster != nullptr);
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// Check whether result is not scaled up.
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CHECK(raster->data_.width() == 256);
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CHECK(raster->data_.height() == 256);
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}
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} // END TEST CASE
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