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author | Asheem Mamoowala <asheem.mamoowala@mapbox.com> | 2017-11-22 10:18:53 -0800 |
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committer | Asheem Mamoowala <asheem.mamoowala@mapbox.com> | 2017-11-22 13:56:38 -0800 |
commit | acae19386129056b9425b114b01f062feecd297e (patch) | |
tree | 8b0db927fe5a78de3393f735d9317aba1034ba7e /src/mbgl/tile/custom_geometry_tile.cpp | |
parent | e3f1d8e3a0beb648ec90ac4d9baa5f27c6cf3935 (diff) | |
download | qtlocation-mapboxgl-acae19386129056b9425b114b01f062feecd297e.tar.gz |
[core] Custom Geometry Sources
Diffstat (limited to 'src/mbgl/tile/custom_geometry_tile.cpp')
-rw-r--r-- | src/mbgl/tile/custom_geometry_tile.cpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/mbgl/tile/custom_geometry_tile.cpp b/src/mbgl/tile/custom_geometry_tile.cpp new file mode 100644 index 0000000000..0d0ff5be61 --- /dev/null +++ b/src/mbgl/tile/custom_geometry_tile.cpp @@ -0,0 +1,81 @@ +#include <mbgl/tile/custom_geometry_tile.hpp> +#include <mbgl/tile/geojson_tile_data.hpp> +#include <mbgl/renderer/query.hpp> +#include <mbgl/renderer/tile_parameters.hpp> +#include <mbgl/actor/scheduler.hpp> +#include <mbgl/style/filter_evaluator.hpp> + +#include <mapbox/geojsonvt.hpp> + +namespace mbgl { + +CustomGeometryTile::CustomGeometryTile(const OverscaledTileID& overscaledTileID, + std::string sourceID_, + const TileParameters& parameters, + const style::CustomGeometrySource::TileOptions options_, + ActorRef<style::CustomTileLoader> loader_) + : GeometryTile(overscaledTileID, sourceID_, parameters), + necessity(TileNecessity::Optional), + options(options_), + loader(loader_), + actor(*Scheduler::GetCurrent(), std::bind(&CustomGeometryTile::setTileData, this, std::placeholders::_1)) { +} + +CustomGeometryTile::~CustomGeometryTile() { + loader.invoke(&style::CustomTileLoader::removeTile, id); +} + +void CustomGeometryTile::setTileData(const GeoJSON& geoJSON) { + + auto featureData = mapbox::geometry::feature_collection<int16_t>(); + if (geoJSON.is<FeatureCollection>() && !geoJSON.get<FeatureCollection>().empty()) { + const double scale = util::EXTENT / options.tileSize; + + mapbox::geojsonvt::TileOptions vtOptions; + vtOptions.extent = util::EXTENT; + vtOptions.buffer = std::round(scale * options.buffer); + vtOptions.tolerance = scale * options.tolerance; + featureData = mapbox::geojsonvt::geoJSONToTile(geoJSON, id.canonical.z, id.canonical.x, id.canonical.y, vtOptions).features; + } else { + setNecessity(TileNecessity::Optional); + } + setData(std::make_unique<GeoJSONTileData>(std::move(featureData))); +} + +//Fetching tile data for custom sources is assumed to be an expensive operation. +// Only required tiles make fetchTile requests. Attempt to cancel a tile +// that is no longer required. +void CustomGeometryTile::setNecessity(TileNecessity newNecessity) { + if (newNecessity != necessity) { + necessity = newNecessity; + if (necessity == TileNecessity::Required) { + loader.invoke(&style::CustomTileLoader::fetchTile, id, actor.self()); + } else if (!isRenderable()) { + loader.invoke(&style::CustomTileLoader::cancelTile, id); + } + } +} + +void CustomGeometryTile::querySourceFeatures( + std::vector<Feature>& result, + const SourceQueryOptions& queryOptions) { + + // Ignore the sourceLayer, there is only one + auto layer = getData()->getLayer({}); + + if (layer) { + auto featureCount = layer->featureCount(); + for (std::size_t i = 0; i < featureCount; i++) { + auto feature = layer->getFeature(i); + + // Apply filter, if any + if (queryOptions.filter && !(*queryOptions.filter)(*feature)) { + continue; + } + + result.push_back(convertFeature(*feature, id.canonical)); + } + } +} + +} // namespace mbgl |