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#pragma once
#include <mbgl/style/layer_impl.hpp>
namespace mbgl {
namespace style {
/**
* @brief An interface, wrapping evaluated layer properties.
*
* It is an abstract base class; concrete derived classes that hold the actual data are provided for each layer type.
*/
class LayerProperties {
public:
virtual ~LayerProperties() = default;
// Returns constants mask for the data-driven properties.
virtual unsigned long constantsMask() const { return 0u; }
Immutable<Layer::Impl> baseImpl;
protected:
LayerProperties(Immutable<Layer::Impl> impl) : baseImpl(std::move(impl)) {}
};
template <class Derived>
inline const auto& getEvaluated(const Immutable<LayerProperties>& properties) {
return static_cast<const Derived&>(*properties).evaluated;
}
template <class Derived>
inline const auto& getCrossfade(const Immutable<LayerProperties>& properties) {
return static_cast<const Derived&>(*properties).crossfade;
}
} // namespace style
} // namespace mbgl
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