module;
#include <array>
#include <chrono>
#include <cstddef>
#include <deque>
#include <limits>
#include <mutex>
#include <ostream>
#include <sstream>
#include <string>
#include <type_traits>
#include <unordered_map>
#include <utility>
#include <vector>
#include "glad/glad.h"
#include <cstdint>
#include <optional>

export module eu07.gl.query;
import eu07.gl.object;

export {


namespace gl
{
class query : public object
{
public:
	enum targets
	{
		SAMPLES_PASSED = 0,
		ANY_SAMPLES_PASSED,
		ANY_SAMPLES_PASSED_CONSERVATIVE,
		PRIMITIVES_GENERATED,
		TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN,
		TIME_ELAPSED
	};

private:
	targets target;
	thread_local static query* active_queries[6];

protected:
	GLenum glenum_target(targets target);

public:
	query(targets target);
	~query();

	void begin();
	void end();

	std::optional<int64_t> result();
};
}

}  // export