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#pragma once
#include <mbgl/gl/extension.hpp>
#include <mbgl/map/backend.hpp>
#include <memory>
#include <functional>
namespace mbgl {
class HeadlessDisplay;
class HeadlessBackend : public Backend {
public:
HeadlessBackend();
HeadlessBackend(std::shared_ptr<HeadlessDisplay>);
~HeadlessBackend() override;
void invalidate() override;
void activate() override;
void deactivate() override;
void notifyMapChange(MapChange) override;
void setMapChangeCallback(std::function<void(MapChange)>&& cb) { mapChangeCallback = std::move(cb); }
struct Impl {
virtual ~Impl() {}
virtual void activateContext() = 0;
virtual void deactivateContext() {}
};
private:
// Implementation specific functions
static gl::glProc initializeExtension(const char*);
bool hasContext() const { return bool(impl); }
bool hasDisplay();
void createContext();
private:
void destroyContext();
void activateContext();
void deactivateContext();
std::unique_ptr<Impl> impl;
std::shared_ptr<HeadlessDisplay> display;
bool extensionsLoaded = false;
bool active = false;
std::function<void(MapChange)> mapChangeCallback;
};
} // namespace mbgl
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