#ifndef __RENDERSTATE_H
#define __RENDERSTATE_H


#include "common.h"
#include "glInterface.h"
#include <Cg/cg.h>
#include <Cg/cgGL.h>


namespace CHCDemoEngine 
{

/** The current render state.
*/
class RenderState
{
public:

	enum Mode
	{
		QUERY,
		RENDER
	};

	enum RenderType
	{
		FIXED,
		DEPTH_PASS,
		DEFERRED
	};

	/** Constructor setting render as default state.
	*/
	RenderState();
	
	~RenderState() { Reset(); };

	/** This must be called each time before and after an occlusion test.
		Mode is one of render mode or query mode. Returns true if a state
		change was issued.
	*/
	bool SetState(Mode mode);
	/** Sets the current render state.
	*/
	void SetState(bool texturing, bool alphaTest, bool cullFace);
	/** Returns either query or render mode
	*/
	inline Mode GetMode() const { return mMode; }
	/** Reset the state.
	*/
	void Reset();
	/** Stores the current vbo id.
	*/
	inline void SetCurrentVboId(int id) { mCurrentVboId = id; }
	/** Returns the current vbo id.
	*/
	inline int GetCurrentVboId() const { return mCurrentVboId; }

	void SetRenderType(RenderType type) { mRenderType = type; }
	RenderType GetRenderType() const { return mRenderType; }


	///////////////////


	///////////////////
	//-- for deferred shading, we have to switch shaders on and off

	static CGprofile sCgFragmentProfile;
	static CGprofile sCgVertexProfile; 

	static CGprogram sCgMrtFragmentProgram;
	static CGprogram sCgMrtFragmentTexProgram;


protected:

	bool mAlphaTestEnabled;
	bool mCullFaceEnabled;
	bool mTexturesEnabled;

	Mode mMode;

	int mCurrentVboId;

	RenderType mRenderType;
};


}

#endif // __RENDERSTATE_H