Interface for IHV metrics

metrics.h

#pragma once

#include <vector>
#include <map>
#include <string>


struct ID3D11Device;
typedef unsigned __int64 uint64;

class MetricsInterface
{

public:

	// The Intel metrics API has some initialization work that must be done _before_
	// the D3D device is initialized.
	virtual bool InitializeAPI() = 0;
	virtual bool DeinitializeAPI() = 0;

	// Our metrics API operates different depending on which rendering API is used, so there
	// would probably need to be some hardcoded mechanisms for providing API-specific context,
	// a la this method
	virtual void SetD3D11Device(ID3D11Device *pDevice) = 0;

	// Called before the query to profile
	virtual void BeginQuery() = 0;
	
	// ... and called after
	virtual void EndQuery() = 0;

	virtual std::vector<std::string> GetAvailableMetrics() = 0;
	
	// Most of the metrics I am looking at right now use 32 and 64bit unsigned integers
	// We have some that may be better represented as a floating point type (e.g. percentages)
	// So possibly some wrapper like boost::any should be used here
	virtual std::map<std::string, uint64> GetAllMetrics() = 0;
	virtual uint64 GetMetric(std::string const & label) = 0;

};