RenderTargetNotifier.h
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RenderTargetNotifier.h
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	#ifndef _ECHOGRENDERTARGETNOTIFIER_H_
	#define _ECHOGRENDERTARGETNOTIFIER_H_
	#include <echo/Types.h>
	#include <string>
	#include <map>

	namespace Echo
	{
	class RenderTarget;

	/**
	* Class to notify render targets of rendering context events.
	* This class is a general class that allows multiple render targets to be
	* notified of lost context without managing a list of render targets. It
	* allows systems to be more distant to the RenderTarget class which has other
	* dependencies.
	*/
	class RenderTargetNotifier
	{
	public:
	RenderTargetNotifier();
	~RenderTargetNotifier();

	//!\brief Add a render target.
	//!\param name A unique name for the render target. This name can be used later to
	//! get a reference to the render target.
	//!\param renderTarget A pointer to the render target.
	//!\param isPrimary set to true if this is the primary render target. The primary render target is usually
	bool AddRenderTarget(const std::string& name, shared_ptr<RenderTarget> renderTarget, bool isPrimary = false);
	shared_ptr<RenderTarget> GetRenderTarget(const std::string& name);

	void RemoveRenderTarget(const std::string& name);
	void RemoveAllRenderTargets();

	shared_ptr<RenderTarget> GetPrimaryRenderTarget() const;

	void GraphicsContextLost();
	void GraphicsContextRestored();
	protected:
	shared_ptr<RenderTarget> mPrimaryRenderTarget;
	typedef std::pair< const std::string, shared_ptr<RenderTarget> > NamedRenderTargetPair;
	typedef std::map < std::string, shared_ptr<RenderTarget> > NamedRenderTargetMap;
	NamedRenderTargetMap mRenderTargets;
	};
	}
	#endif