1 files changed, 118 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_orchestrator.hpp b/src/mbgl/renderer/render_orchestrator.hpp
new file mode 100644
index 0000000000..a60bac2e16
--- /dev/null
+++ b/src/mbgl/renderer/render_orchestrator.hpp
@@ -0,0 +1,118 @@
+#pragma once
+
+#include <mbgl/renderer/renderer.hpp>
+#include <mbgl/renderer/render_source_observer.hpp>
+#include <mbgl/renderer/render_light.hpp>
+#include <mbgl/style/image.hpp>
+#include <mbgl/style/source.hpp>
+#include <mbgl/style/layer.hpp>
+#include <mbgl/map/transform_state.hpp>
+#include <mbgl/map/zoom_history.hpp>
+#include <mbgl/text/cross_tile_symbol_index.hpp>
+#include <mbgl/text/glyph_manager_observer.hpp>
+#include <mbgl/renderer/image_manager_observer.hpp>
+#include <mbgl/text/placement.hpp>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace mbgl {
+
+class RendererObserver;
+class RenderSource;
+class RenderLayer;
+class UpdateParameters;
+class RenderStaticData;
+class RenderedQueryOptions;
+class SourceQueryOptions;
+class GlyphManager;
+class ImageManager;
+class LineAtlas;
+class PatternAtlas;
+class CrossTileSymbolIndex;
+class RenderTree;
+
+class RenderOrchestrator final : public GlyphManagerObserver,
+                                 public ImageManagerObserver,
+                                 public RenderSourceObserver {
+public:
+    RenderOrchestrator(
+        bool backgroundLayerAsColor_,
+        optional<std::string> localFontFamily_);
+    ~RenderOrchestrator() override;
+
+    void markContextLost() {
+        contextLost = true;
+    };
+    // TODO: Introduce RenderOrchestratorObserver.
+    void setObserver(RendererObserver*);
+
+    std::unique_ptr<RenderTree> createRenderTree(const UpdateParameters&);
+
+    std::vector<Feature> queryRenderedFeatures(const ScreenLineString&, const RenderedQueryOptions&) const;
+    std::vector<Feature> querySourceFeatures(const std::string& sourceID, const SourceQueryOptions&) const;
+    std::vector<Feature> queryShapeAnnotations(const ScreenLineString&) const;
+
+    FeatureExtensionValue queryFeatureExtensions(const std::string& sourceID,
+                                                 const Feature& feature,
+                                                 const std::string& extension,
+                                                 const std::string& extensionField,
+                                                 const optional<std::map<std::string, Value>>& args) const;
+
+    void reduceMemoryUse();
+    void dumpDebugLogs();
+
+private:
+    bool isLoaded() const;
+    bool hasTransitions(TimePoint) const;
+
+    RenderSource* getRenderSource(const std::string& id) const;
+
+          RenderLayer* getRenderLayer(const std::string& id);
+    const RenderLayer* getRenderLayer(const std::string& id) const;
+              
+    void queryRenderedSymbols(std::unordered_map<std::string, std::vector<Feature>>& resultsByLayer,
+                              const ScreenLineString& geometry,
+                              const std::vector<const RenderLayer*>& layers,
+                              const RenderedQueryOptions& options) const;
+    
+    std::vector<Feature> queryRenderedFeatures(const ScreenLineString&, const RenderedQueryOptions&, const std::vector<const RenderLayer*>&) const;
+
+    // GlyphManagerObserver implementation.
+    void onGlyphsError(const FontStack&, const GlyphRange&, std::exception_ptr) override;
+
+    // RenderSourceObserver implementation.
+    void onTileChanged(RenderSource&, const OverscaledTileID&) override;
+    void onTileError(RenderSource&, const OverscaledTileID&, std::exception_ptr) override;
+
+    // ImageManagerObserver implementation
+    void onStyleImageMissing(const std::string&, std::function<void()>) override;
+    void onRemoveUnusedStyleImages(const std::vector<std::string>&) override;
+
+    RendererObserver* observer;
+
+    ZoomHistory zoomHistory;
+    TransformState transformState;
+
+    std::unique_ptr<GlyphManager> glyphManager;
+    std::unique_ptr<ImageManager> imageManager;
+    std::unique_ptr<LineAtlas> lineAtlas;
+    std::unique_ptr<PatternAtlas> patternAtlas;
+
+    Immutable<std::vector<Immutable<style::Image::Impl>>> imageImpls;
+    Immutable<std::vector<Immutable<style::Source::Impl>>> sourceImpls;
+    Immutable<std::vector<Immutable<style::Layer::Impl>>> layerImpls;
+
+    std::unordered_map<std::string, std::unique_ptr<RenderSource>> renderSources;
+    std::unordered_map<std::string, std::unique_ptr<RenderLayer>> renderLayers;
+    RenderLight renderLight;
+
+    CrossTileSymbolIndex crossTileSymbolIndex;
+    std::unique_ptr<Placement> placement;
+
+    const bool backgroundLayerAsColor;
+    bool contextLost = false;
+};
+
+} // namespace mbgl