src/mbgl/annotation/point_annotation_impl.cpp


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#include <mbgl/annotation/point_annotation_impl.hpp>
#include <mbgl/annotation/annotation_tile.hpp>

namespace mbgl {

PointAnnotationImpl::PointAnnotationImpl(const AnnotationID id_, const PointAnnotation& point_)
: id(id_),
  point(point_) {
}

void PointAnnotationImpl::updateLayer(const TileID& tileID, AnnotationTileLayer& layer) const {
    std::unordered_map<std::string, std::string> featureProperties;
    featureProperties.emplace("sprite", point.icon.empty() ? std::string("default_marker") : point.icon);

    const uint16_t extent = 4096;
    const mbgl::PrecisionPoint pp = point.position.project();
    const uint32_t z2 = 1 << tileID.z;
    const uint32_t x = pp.x * z2;
    const uint32_t y = pp.y * z2;
    const Coordinate coordinate(extent * (pp.x * z2 - x), extent * (pp.y * z2 - y));

    layer.features.emplace_back(
        std::make_shared<const AnnotationTileFeature>(FeatureType::Point,
                                                      GeometryCollection {{ {{ coordinate }} }},
                                                      featureProperties));
}

LatLngBounds PointAnnotationImpl::bounds() const {
    return LatLngBounds(point.position, point.position);
}

}