// Copyright (C) 2009-present, Panagiotis Christopoulos Charitos and contributors.
// All rights reserved.
// Code licensed under the BSD License.
// http://www.anki3d.org/LICENSE

#pragma once

#include <AnKi/Renderer/RendererObject.h>

namespace anki {

/// @addtogroup renderer
/// @{

ANKI_CVAR2(NumericCVar<F32>, Render, VolumetricLightingAccumulation, QualityXY, 4.0f, 1.0f, 16.0f, "Quality of XY dimensions of volumetric lights")
ANKI_CVAR2(NumericCVar<F32>, Render, VolumetricLightingAccumulation, QualityZ, 4.0f, 1.0f, 16.0f, "Quality of Z dimension of volumetric lights")
ANKI_CVAR2(NumericCVar<U32>, Render, VolumetricLightingAccumulation, FinalZSplit, 26, 1, 256,
		   "Final cluster split that will recieve volumetric lights")

/// Volumetric lighting. It accumulates lighting in a volume texture.
class VolumetricLightingAccumulation : public RendererObject
{
public:
	Error init();

	/// Populate the rendergraph.
	void populateRenderGraph(RenderingContext& ctx);

	RenderTargetHandle getRt() const
	{
		return m_runCtx.m_rts[1];
	}

private:
	ShaderProgramResourcePtr m_prog;
	ShaderProgramPtr m_grProg;

	Array<TexturePtr, 2> m_rtTextures;
	ImageResourcePtr m_noiseImage;

	Array<U32, 3> m_volumeSize;

	class
	{
	public:
		Array<RenderTargetHandle, 2> m_rts;
	} m_runCtx; ///< Runtime context.
};
/// @}

} // end namespace anki