#pragma once

#include "IEngine.h"
#include "IShader.h"
#include "ITexture.h"
#include "IRenderCommandNode.h"
#include "IResourceFactory.h"
#include "IPingPongBuffer.h"


class PingPongBuffer
	: public IPingPongBuffer
{
public:
	PingPongBuffer(IEngine& argEngine);
	virtual ~PingPongBuffer();

	virtual ITexture& get_InputTexture() const;
	virtual void set_InputTexture(ITexture& argTexture);

	virtual ITexture& get_OutputTexture() const;

	virtual const PingPongBufferDescription& get_Descriptor() const;
	virtual void set_Descriptor(const PingPongBufferDescription& argValue);
	virtual IRenderCommandNode& get_RootNode() const;
	virtual IRenderCommandNode& get_PreProcessNode() const;

protected:
	void Rebuild(const PingPongBufferDescription& argValue);

private:
	IEngine& m_Engine;

	PingPongBufferDescription m_Descriptor;

	ITexture* m_InputTexture;

	IRenderCommandNode* m_RootNode;
	IRenderCommandNode* m_PreProcessNode;
	IRenderCommandNode* m_RenderTargetNodeA;
	IRenderCommandNode* m_RenderTargetNodeB;
	IShader* m_ShaderA;
	IShader* m_ShaderB;
	IShader* m_ShaderPreProcess;
	IRenderTargetTexture* m_TextureA;
	IRenderTargetTexture* m_TextureB;
	IGeometryBuffer* m_ScreenQuad;
	IShaderParameterCollection* m_ShaderParameterA;
	IShaderParameterCollection* m_ShaderParameterB;
	IShaderParameterCollection* m_ShaderParameterPreProcess;
};