DeferredGeometryPass.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_DEFERREDGEOMETRYPASS_HPP
#define NAZARA_DEFERREDGEOMETRYPASS_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Graphics/DeferredRenderPass.hpp>
#include <Nazara/Renderer/RenderStates.hpp>
#include <Nazara/Renderer/Shader.hpp>
#include <unordered_map>

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

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

        protected:
            struct ShaderUniforms;

            const ShaderUniforms* GetShaderUniforms(const Shader* shader) const;
            void OnShaderInvalidated(const Shader* shader) const;

            struct ShaderUniforms
            {
                NazaraSlot(Shader, OnShaderUniformInvalidated, shaderUniformInvalidatedSlot);
                NazaraSlot(Shader, OnShaderRelease, shaderReleaseSlot);

                int eyePosition;
                int sceneAmbient;
                int textureOverlay;
            };

            mutable std::unordered_map<const Shader*, ShaderUniforms> m_shaderUniforms;
            RenderStates m_clearStates;
            ShaderRef m_clearShader;
    };
}

#endif // NAZARA_DEFERREDGEOMETRYPASS_HPP