DeferredBloomPass.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Graphics module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_DEFERREDBLOOMPASS_HPP
#define NAZARA_DEFERREDBLOOMPASS_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Graphics/DeferredRenderPass.hpp>
#include <Nazara/Renderer/RenderStates.hpp>
#include <Nazara/Renderer/RenderTexture.hpp>
#include <Nazara/Renderer/Shader.hpp>
#include <Nazara/Renderer/Texture.hpp>
#include <Nazara/Renderer/TextureSampler.hpp>

namespace Nz
{
    class NAZARA_GRAPHICS_API DeferredBloomPass : public DeferredRenderPass
    {
        public:
            DeferredBloomPass();
            virtual ~DeferredBloomPass();

            unsigned int GetBlurPassCount() const;
            float GetBrightLuminance() const;
            float GetBrightMiddleGrey() const;
            float GetBrightThreshold() const;
            Texture* GetTexture(unsigned int i) const;

            bool Process(const SceneData& sceneData, unsigned int firstWorkTexture, unsigned int secondWorkTexture) const override;
            bool Resize(const Vector2ui& dimensions) override;

            void SetBlurPassCount(unsigned int passCount);
            void SetBrightLuminance(float luminance);
            void SetBrightMiddleGrey(float middleGrey);
            void SetBrightThreshold(float threshold);

        protected:
            RenderStates m_bloomStates;
            RenderTexture m_bloomRTT;
            ShaderRef m_bloomBrightShader;
            ShaderRef m_bloomFinalShader;
            ShaderRef m_gaussianBlurShader;
            TextureRef m_bloomTextures[2];
            TextureSampler m_bilinearSampler;
            mutable bool m_uniformUpdated;
            float m_brightLuminance;
            float m_brightMiddleGrey;
            float m_brightThreshold;
            int m_gaussianBlurShaderFilterLocation;
            unsigned int m_blurPassCount;
    };
}

#endif // NAZARA_DEFERREDBLOOMPASS_HPP