118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
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#include "catch.hpp"
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// mapnik
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#include <mapnik/util/conversions.hpp>
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#include <mapnik/util/trim.hpp>
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#include <mapnik/path.hpp>
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#include <mapnik/warning.hpp>
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MAPNIK_DISABLE_WARNING_PUSH
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#include <mapnik/warning_ignore.hpp>
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#include <boost/algorithm/string.hpp>
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MAPNIK_DISABLE_WARNING_POP
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// stl
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#include <stdexcept>
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#include <iostream>
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#include <sstream>
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#include <fstream>
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#include <vector>
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// agg
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#include "agg_conv_clip_polyline.h"
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template<typename T>
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std::string dump_path(T& path)
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{
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unsigned cmd = 1;
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double x = 0;
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double y = 0;
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unsigned idx = 0;
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std::ostringstream s;
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path.rewind(0);
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while ((cmd = path.vertex(&x, &y)) != mapnik::SEG_END)
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{
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if (idx > 0)
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s << ",";
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s << x << " " << y << " " << cmd;
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idx++;
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}
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return s.str();
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}
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std::string clip_line(mapnik::box2d<double> const& bbox, mapnik::path_type const& path)
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{
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using line_clipper = agg::conv_clip_polyline<mapnik::vertex_adapter>;
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mapnik::vertex_adapter va(path);
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line_clipper clipped(va);
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clipped.clip_box(bbox.minx(), bbox.miny(), bbox.maxx(), bbox.maxy());
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return dump_path(clipped);
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}
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void parse_geom(mapnik::path_type& path, std::string const& geom_string)
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{
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std::vector<std::string> vertices;
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boost::split(vertices, geom_string, boost::is_any_of(","));
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for (std::string const& vert : vertices)
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{
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std::vector<std::string> commands;
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boost::split(commands, vert, boost::is_any_of(" "));
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if (commands.size() != 3)
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{
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throw std::runtime_error(std::string("could not parse geometry '") + geom_string + "'");
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}
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double x = 0;
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double y = 0;
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int c = 0;
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if (mapnik::util::string2double(commands[0], x) && mapnik::util::string2double(commands[1], y) &&
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mapnik::util::string2int(commands[2], c))
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{
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path.push_vertex(x, y, (mapnik::CommandType)c);
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}
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else
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{
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throw std::runtime_error(std::string("could not parse geometry '") + geom_string + "'");
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}
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}
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}
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TEST_CASE("clipping")
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{
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SECTION("lines")
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{
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try
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{
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std::string filename("test/unit/data/cases.txt");
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std::ifstream stream(filename.c_str(), std::ios_base::in | std::ios_base::binary);
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if (!stream.is_open())
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throw std::runtime_error("could not open: '" + filename + "'");
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std::string csv_line;
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while (std::getline(stream, csv_line, '\n'))
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{
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if (csv_line.empty() || csv_line[0] == '#')
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continue;
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std::vector<std::string> parts;
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boost::split(parts, csv_line, boost::is_any_of(";"));
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// first part is clipping box
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mapnik::box2d<double> bbox;
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if (!bbox.from_string(parts[0]))
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{
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throw std::runtime_error(std::string("could not parse bbox '") + parts[0] + "'");
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}
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// second part is input geometry
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mapnik::path_type path;
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parse_geom(path, parts[1]);
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// std::clog << dump_path(path) << "\n";
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// third part is expected, clipped geometry
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REQUIRE(clip_line(bbox, path) == mapnik::util::trim_copy(parts[2]));
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}
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stream.close();
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}
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catch (std::exception const& ex)
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{
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std::cerr << ex.what() << "\n";
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}
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}
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}
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