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#pragma once
#include <mbgl/gl/implementation.hpp>
#if MBGL_USE_QT
class QGLWidget;
#elif MBGL_USE_CGL
#include <OpenGL/OpenGL.h>
#endif
#include <mbgl/map/backend.hpp>
#include <mbgl/gl/extension.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); }
private:
void activateContext();
void deactivateContext();
private:
// Implementation specific functions
static gl::glProc initializeExtension(const char*);
void createContext();
void destroyContext();
std::shared_ptr<HeadlessDisplay> display;
bool extensionsLoaded = false;
bool active = false;
#if MBGL_USE_QT
QGLWidget* glContext = nullptr;
#endif
#if MBGL_USE_CGL
CGLContextObj glContext = nullptr;
#endif
#if MBGL_USE_EGL
void *glContext = nullptr;
#endif
std::function<void(MapChange)> mapChangeCallback;
};
} // namespace mbgl
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