#pragma once
#include "RenderingRun.h"

/**
	@brief Base abstract class __declspec( dllexport ) that defines a rendering process of a shadow map.

	A shadow map stores depth values from the lightsource.
*/
class __declspec( dllexport ) DepthShadowMapRenderingRun : virtual public RenderingRun
{	
public:
	/**
		@brief Constructor.

		@param resolutionX	width of the depth map texture
		@param resolutionY	height of the depth map texture
	*/
	DepthShadowMapRenderingRun( unsigned int resolutionX,
								  unsigned int resolutionY)
							:RenderingRun(1, 1)
	{
		this->resolutionX = resolutionX;
		this->resolutionY = resolutionY;
	}

	virtual ~DepthShadowMapRenderingRun(){}

protected:
	/**
		@brief	width of the depth map texture
	*/
    unsigned int resolutionX;
	/**
		@brief	height of the depth map texture
	*/
	unsigned int resolutionY;
	
	/**
		@brief Creates the depth map texture (2D or CUBE according to light type).		
	*/
	virtual inline void createDepthMap() = 0;
	/**
		@brief Updates one face of the depth cubemap (used only in case of point lights).

		@param facenum the number of the face to be updated
	*/
	virtual inline void updateDepthCubeFace(int facenum) = 0;
	/**
		@brief Updates the depth map (in case of directional and spot lights).		
	*/
	virtual inline void updateDepthMap() = 0;
	//inherited
	virtual void updateFrame(unsigned long frameNum) = 0;		
};