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Diffstat (limited to 'src/mbgl/renderer/render_layer.hpp')
-rw-r--r-- | src/mbgl/renderer/render_layer.hpp | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_layer.hpp b/src/mbgl/renderer/render_layer.hpp new file mode 100644 index 0000000000..af5345d5e3 --- /dev/null +++ b/src/mbgl/renderer/render_layer.hpp @@ -0,0 +1,87 @@ +#pragma once + +#include <mbgl/renderer/render_pass.hpp> +#include <mbgl/style/layer_impl.hpp> +#include <mbgl/style/layer_type.hpp> +#include <mbgl/tile/geometry_tile_data.hpp> + +#include <memory> +#include <string> + +namespace mbgl { + +class Bucket; +class BucketParameters; + +namespace style { +class CascadeParameters; +class PropertyEvaluationParameters; +} // namespace style + +class RenderLayer { + +protected: + RenderLayer(style::LayerType, const style::Layer::Impl&); + + const style::LayerType type; + +public: + + virtual ~RenderLayer() = default; + + // Create an identical copy of this layer. + virtual std::unique_ptr<RenderLayer> clone() const = 0; + + // Partially evaluate paint properties based on a set of classes. + virtual void cascade(const style::CascadeParameters&) = 0; + + // Fully evaluate cascaded paint properties based on a zoom level. + // Returns true if any paint properties have active transitions. + virtual bool evaluate(const style::PropertyEvaluationParameters&) = 0; + + // Check whether this layer is of the given subtype. + template <class T> + bool is() const; + + // Dynamically cast this layer to the given subtype. + template <class T> + T* as() { + return is<T>() ? reinterpret_cast<T*>(this) : nullptr; + } + + template <class T> + const T* as() const { + return is<T>() ? reinterpret_cast<const T*>(this) : nullptr; + } + + const std::string& getID() const; + + // Checks whether this layer needs to be rendered in the given render pass. + bool hasRenderPass(RenderPass) const; + + // Checks whether this layer can be rendered. + bool needsRendering(float zoom) const; + + // Check wether the given geometry intersects + // with the feature + virtual bool queryIntersectsFeature( + const GeometryCoordinates&, + const GeometryTileFeature&, + const float, + const float, + const float) const { return false; }; + + virtual std::unique_ptr<Bucket> createBucket(const BucketParameters&, const std::vector<const RenderLayer*>&) const = 0; + + // Private implementation + const style::Layer::Impl& baseImpl; + + friend std::string layoutKey(const RenderLayer&); +protected: + + // Stores what render passes this layer is currently enabled for. This depends on the + // evaluated StyleProperties object and is updated accordingly. + RenderPass passes = RenderPass::None; +}; + +} // namespace mbgl |