40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#pragma once
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#include <mbgl/style/layer_impl.hpp>
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namespace mbgl {
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namespace style {
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/**
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* @brief An interface, wrapping evaluated layer properties.
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*
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* It is an abstract base class; concrete derived classes that hold the actual
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* data are provided for each layer type.
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*/
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class LayerProperties {
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public:
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virtual ~LayerProperties() = default;
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/// Returns constants mask for the data-driven properties.
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virtual unsigned long constantsMask() const { return 0u; }
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Immutable<Layer::Impl> baseImpl;
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/// Contains render passes used by the renderer, see `mbgl::RenderPass`.
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uint8_t renderPasses = 0u;
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protected:
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LayerProperties(Immutable<Layer::Impl> impl)
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: baseImpl(std::move(impl)) {}
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};
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template <class Derived>
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inline const auto& getEvaluated(const Immutable<LayerProperties>& properties) {
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return static_cast<const Derived&>(*properties).evaluated;
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}
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template <class Derived>
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inline const auto& getCrossfade(const Immutable<LayerProperties>& properties) {
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return static_cast<const Derived&>(*properties).crossfade;
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}
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} // namespace style
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} // namespace mbgl
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