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#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 <mbgl/util/string.hpp>
#include <mbgl/tile/tile_observer.hpp>
#include <mbgl/style/custom_tile_loader.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_),
mailbox(std::make_shared<Mailbox>(*Scheduler::GetCurrent())),
actorRef(*this, mailbox) {
}
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 = ::round(scale * options.buffer);
vtOptions.tolerance = scale * options.tolerance;
featureData = mapbox::geojsonvt::geoJSONToTile(geoJSON, id.canonical.z, id.canonical.x, id.canonical.y, vtOptions, options.wrap, options.clip).features;
} else {
setNecessity(TileNecessity::Optional);
}
setData(std::make_unique<GeoJSONTileData>(std::move(featureData)));
}
void CustomGeometryTile::invalidateTileData() {
stale = true;
observer->onTileChanged(*this);
}
//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 || stale ) {
necessity = newNecessity;
if (necessity == TileNecessity::Required) {
loader.invoke(&style::CustomTileLoader::fetchTile, id, actorRef);
stale = false;
} 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)(style::expression::EvaluationContext { static_cast<float>(id.overscaledZ), feature.get() })) {
continue;
}
result.push_back(convertFeature(*feature, id.canonical));
}
}
}
} // namespace mbgl
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