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[core] Calculate GeoJSON tile geometries in a background thread

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Call `mapbox::geojsonvt::GeoJSONVT::getTile()` in a background
thread, so that the rendering thread is not blocked.
This commit is contained in:
Mikhail Pozdnyakov
2019-11-20 21:05:45 +02:00
parent ab5572b0bc
commit 6419cd0ab2
6 changed files with 87 additions and 53 deletions
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12
include/mbgl/style/sources/geojson_source.hpp
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@@ -39,17 +39,19 @@ struct GeoJSONOptions {
};
class GeoJSONData {
public:
using TileFeatures = mapbox::feature::feature_collection<int16_t>;
using Features = mapbox::feature::feature_collection<double>;
static std::shared_ptr<GeoJSONData> create(const GeoJSON&,
Immutable<GeoJSONOptions> = GeoJSONOptions::defaultOptions());
virtual ~GeoJSONData() = default;
virtual mapbox::feature::feature_collection<int16_t> getTile(const CanonicalTileID&) = 0;
virtual void getTile(const CanonicalTileID&, const std::function<void(TileFeatures)>&) = 0;
// SuperclusterData
virtual mapbox::feature::feature_collection<double> getChildren(const std::uint32_t) = 0;
virtual mapbox::feature::feature_collection<double> getLeaves(const std::uint32_t,
const std::uint32_t limit = 10u,
const std::uint32_t offset = 0u) = 0;
virtual Features getChildren(const std::uint32_t) = 0;
virtual Features getLeaves(const std::uint32_t,
const std::uint32_t limit = 10u,
const std::uint32_t offset = 0u) = 0;
virtual std::uint8_t getClusterExpansionZoom(std::uint32_t) = 0;
};