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#pragma once
#include <mbgl/style/image_impl.hpp>
#include <mbgl/renderer/image_atlas.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/immutable.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/gfx/texture.hpp>
#include <mbgl/renderer/image_manager_observer.hpp>
#include <mapbox/shelf-pack.hpp>
#include <set>
#include <string>
namespace mbgl {
template <class T>
class Actor;
namespace gfx {
class Context;
} // namespace gfx
class ImageRequestor;
/*
ImageManager does two things:
1. Tracks requests for icon images from tile workers and sends responses when the requests are fulfilled.
2. Builds a texture atlas for pattern images.
These are disparate responsibilities and should eventually be handled by different classes. When we implement
data-driven support for `*-pattern`, we'll likely use per-bucket pattern atlases, and that would be a good time
to refactor this.
*/
class ImageManager : public util::noncopyable {
public:
ImageManager();
~ImageManager();
void setObserver(ImageManagerObserver*);
void setLoaded(bool);
bool isLoaded() const;
void dumpDebugLogs() const;
const style::Image::Impl* getImage(const std::string&) const;
void addImage(Immutable<style::Image::Impl>);
bool updateImage(Immutable<style::Image::Impl>);
void removeImage(const std::string&);
void getImages(ImageRequestor&, ImageRequestPair&&);
void removeRequestor(ImageRequestor&);
void notifyIfMissingImageAdded();
void reduceMemoryUse();
ImageVersionMap updatedImageVersions;
private:
void checkMissingAndNotify(ImageRequestor&, const ImageRequestPair&);
void notify(ImageRequestor&, const ImageRequestPair&) const;
void removePattern(const std::string&);
bool loaded = false;
std::map<ImageRequestor*, ImageRequestPair> requestors;
using Callback = std::function<void()>;
using ActorCallback = Actor<Callback>;
struct MissingImageRequestPair {
ImageRequestPair pair;
std::map<std::string, std::unique_ptr<ActorCallback>> callbacks;
};
std::map<ImageRequestor*, MissingImageRequestPair> missingImageRequestors;
std::map<std::string, std::set<ImageRequestor*>> requestedImages;
ImageMap images;
ImageManagerObserver* observer = nullptr;
// Pattern stuff
public:
optional<ImagePosition> getPattern(const std::string& name);
gfx::TextureBinding textureBinding(gfx::Context&);
void upload(gfx::Context&);
Size getPixelSize() const;
// Only for use in tests.
const PremultipliedImage& getAtlasImage() const {
return atlasImage;
}
private:
struct Pattern {
mapbox::Bin* bin;
ImagePosition position;
};
mapbox::ShelfPack shelfPack;
std::unordered_map<std::string, Pattern> patterns;
PremultipliedImage atlasImage;
mbgl::optional<gfx::Texture> atlasTexture;
bool dirty = true;
};
class ImageRequestor {
public:
explicit ImageRequestor(ImageManager&);
virtual ~ImageRequestor();
virtual void onImagesAvailable(ImageMap icons, ImageMap patterns, ImageVersionMap versionMap, uint64_t imageCorrelationID) = 0;
private:
ImageManager& imageManager;
};
} // namespace mbgl
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