mapnik/test/standalone/agg_rasterizer_integer_overflow_test.cpp

#define CATCH_CONFIG_MAIN
#include "catch.hpp"

#include <mapnik/map.hpp>
#include <mapnik/memory_datasource.hpp>
#include <mapnik/json/feature_parser.hpp>
#include <mapnik/feature_type_style.hpp>
#include <mapnik/rule.hpp>
#include <mapnik/symbolizer.hpp>
#include <mapnik/layer.hpp>
#include <mapnik/agg_renderer.hpp>
#include <mapnik/debug.hpp>

#include <iostream>

// geojson box of the world
const std::string geojson("{ \"type\": \"Feature\", \"properties\": { }, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -17963313.143242701888084, -6300857.11560364998877 ], [ -17963313.143242701888084, 13071343.332991421222687 ], [ 7396658.353099936619401, 13071343.332991421222687 ], [ 7396658.353099936619401, -6300857.11560364998877 ], [ -17963313.143242701888084, -6300857.11560364998877 ] ] ] } }");

TEST_CASE("agg_rasterizer_integer_overflow") {

SECTION("coordinates_do_not_overflow_and_polygon_is_rendered") {
  auto expected_color = mapnik::color("white");

  mapnik::Map m(256,256);
  m.set_background(mapnik::color("black"));

  mapnik::feature_type_style s;
  {
    mapnik::rule r;
    mapnik::polygon_symbolizer sym;
    mapnik::put(sym, mapnik::keys::fill, expected_color);
    mapnik::put(sym, mapnik::keys::clip, false);
    r.append(std::move(sym));
    s.add_rule(std::move(r));
  }
  m.insert_style("style",std::move(s));

  mapnik::layer lyr("Layer");
  lyr.styles().emplace_back("style");
  {
    auto ds = std::make_shared<mapnik::memory_datasource>(mapnik::parameters());
    auto context = std::make_shared<mapnik::context_type>();
    auto f = std::make_shared<mapnik::feature_impl>(context, 0);
    REQUIRE(mapnik::json::from_geojson(geojson, *f));
    ds->push(f);
    lyr.set_datasource(ds);
  }
  m.add_layer(std::move(lyr));

  // 17/20864/45265.png
  m.zoom_to_box(mapnik::box2d<double>(-13658379.710221574,6197514.253362091,-13657768.213995293,6198125.749588372));

  // works 15/5216/11316.png
  //m.zoom_to_box(mapnik::box2d<double>(-13658379.710221574,6195679.764683247,-13655933.72531645,6198125.749588372));

  mapnik::image_rgba8 im(256, 256);
  {
    mapnik::agg_renderer<mapnik::image_rgba8> ren(m, im);
    ren.apply();
  }

  REQUIRE(im(128,128) == expected_color.rgba());
} // SECTION
} // TEST_CASE