da81211fea
The callback will be called when any of the resources requested from the network failed to load. There is not recovery implemented yet, so the closest thing to reseting the Map object and reloading all the resources would be setting a new style.
104 lines
2.6 KiB
C++
104 lines
2.6 KiB
C++
#ifndef MBGL_MAP_MAP_CONTEXT
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#define MBGL_MAP_MAP_CONTEXT
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#include <mbgl/map/tile_id.hpp>
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#include <mbgl/map/update.hpp>
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#include <mbgl/map/environment.hpp>
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#include <mbgl/map/resource_loader.hpp>
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#include <mbgl/map/transform_state.hpp>
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#include <mbgl/util/ptr.hpp>
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#include <vector>
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typedef struct uv_loop_s uv_loop_t;
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namespace uv {
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class async;
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}
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namespace mbgl {
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class View;
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class MapData;
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class GlyphStore;
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class GlyphAtlas;
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class SpriteAtlas;
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class LineAtlas;
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class TexturePool;
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class Painter;
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class Sprite;
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class Style;
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class Worker;
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class StillImage;
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struct LatLng;
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struct LatLngBounds;
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class MapContext : public ResourceLoader::Observer {
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public:
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MapContext(uv_loop_t*, View&, FileSource&, MapData&);
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~MapContext();
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void pause();
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void render();
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void resize(uint16_t width, uint16_t height, float ratio);
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using StillImageCallback = std::function<void(std::exception_ptr, std::unique_ptr<const StillImage>)>;
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void renderStill(StillImageCallback callback);
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void triggerUpdate(Update = Update::Nothing);
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void setStyleURL(const std::string&);
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void setStyleJSON(const std::string& json, const std::string& base);
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std::string getStyleURL() const { return styleURL; }
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std::string getStyleJSON() const { return styleJSON; }
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double getTopOffsetPixelsForAnnotationSymbol(const std::string& symbol);
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void updateAnnotationTiles(const std::vector<TileID>&);
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void setSourceTileCacheSize(size_t size);
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void onLowMemory();
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// ResourceLoader::Observer implementation.
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void onTileDataChanged() override;
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void onResourceLoadingFailed(std::exception_ptr error) override;
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private:
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void updateTiles();
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// Update the state indicated by the accumulated Update flags, then render.
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void update();
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// Loads the actual JSON object an creates a new Style object.
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void loadStyleJSON(const std::string& json, const std::string& base);
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View& view;
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MapData& data;
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Environment env;
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EnvironmentScope envScope;
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UpdateType updated { static_cast<UpdateType>(Update::Nothing) };
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std::unique_ptr<uv::async> asyncUpdate;
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std::unique_ptr<GlyphStore> glyphStore;
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std::unique_ptr<GlyphAtlas> glyphAtlas;
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std::unique_ptr<SpriteAtlas> spriteAtlas;
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std::unique_ptr<LineAtlas> lineAtlas;
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std::unique_ptr<TexturePool> texturePool;
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std::unique_ptr<Painter> painter;
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std::unique_ptr<Style> style;
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std::unique_ptr<ResourceLoader> resourceLoader;
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std::string styleURL;
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std::string styleJSON;
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StillImageCallback callback;
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size_t sourceCacheSize;
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TransformState transformState;
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};
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}
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#endif
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