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#ifndef MBGL_MAP_TILE_WORKER
#define MBGL_MAP_TILE_WORKER
#include <mapbox/variant.hpp>
#include <mbgl/map/mode.hpp>
#include <mbgl/map/tile_data.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/ptr.hpp>
#include <mbgl/text/placement_config.hpp>
#include <string>
#include <memory>
#include <mutex>
#include <list>
#include <unordered_map>
namespace mbgl {
class CollisionTile;
class GeometryTile;
class SpriteStore;
class GlyphAtlas;
class GlyphStore;
class Bucket;
class StyleLayer;
class SymbolLayer;
// We're using this class to shuttle the resulting buckets from the worker thread to the MapContext
// thread. This class is movable-only because the vector contains movable-only value elements.
class TileParseResultBuckets {
public:
TileData::State state = TileData::State::invalid;
std::unordered_map<std::string, std::unique_ptr<Bucket>> buckets;
};
using TileParseResult = mapbox::util::variant<
TileParseResultBuckets, // success
std::exception_ptr>; // error
class TileWorker : public util::noncopyable {
public:
TileWorker(TileID,
std::string sourceID,
SpriteStore&,
GlyphAtlas&,
GlyphStore&,
const std::atomic<TileData::State>&,
const MapMode);
~TileWorker();
TileParseResult parseAllLayers(std::vector<std::unique_ptr<StyleLayer>>,
std::unique_ptr<const GeometryTile> geometryTile,
PlacementConfig);
TileParseResult parsePendingLayers(PlacementConfig);
void redoPlacement(const std::unordered_map<std::string, std::unique_ptr<Bucket>>*,
PlacementConfig);
private:
void parseLayer(const StyleLayer*, const GeometryTile&);
void insertBucket(const std::string& name, std::unique_ptr<Bucket>);
void placeLayers(PlacementConfig);
const TileID id;
const std::string sourceID;
SpriteStore& spriteStore;
GlyphAtlas& glyphAtlas;
GlyphStore& glyphStore;
const std::atomic<TileData::State>& state;
const MapMode mode;
bool partialParse = false;
std::vector<std::unique_ptr<StyleLayer>> layers;
// Contains buckets that we couldn't parse so far due to missing resources.
// They will be attempted on subsequent parses.
std::list<std::pair<const SymbolLayer*, std::unique_ptr<Bucket>>> pending;
// Contains buckets that have been parsed, but still need placement.
// They will be placed when all buckets have been parsed.
std::unordered_map<std::string, std::unique_ptr<Bucket>> placementPending;
// Temporary holder
TileParseResultBuckets result;
};
} // namespace mbgl
#endif
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