DepthRenderTechnique.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_DEPTHRENDERTECHNIQUE_HPP
#define NAZARA_DEPTHRENDERTECHNIQUE_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Graphics/AbstractRenderTechnique.hpp>
#include <Nazara/Graphics/Config.hpp>
#include <Nazara/Graphics/DepthRenderQueue.hpp>
#include <Nazara/Renderer/Shader.hpp>
#include <Nazara/Utility/IndexBuffer.hpp>
#include <Nazara/Utility/VertexBuffer.hpp>

namespace Nz
{
    class NAZARA_GRAPHICS_API DepthRenderTechnique : public AbstractRenderTechnique
    {
        public:
            DepthRenderTechnique();
            ~DepthRenderTechnique() = default;

            void Clear(const SceneData& sceneData) const override;
            bool Draw(const SceneData& sceneData) const override;

            AbstractRenderQueue* GetRenderQueue() override;
            RenderTechniqueType GetType() const override;

            static bool Initialize();
            static void Uninitialize();

        private:
            struct ShaderUniforms;

            void DrawBasicSprites(const SceneData& sceneData, ForwardRenderQueue::Layer& layer) const;
            void DrawBillboards(const SceneData& sceneData, ForwardRenderQueue::Layer& layer) const;
            void DrawOpaqueModels(const SceneData& sceneData, ForwardRenderQueue::Layer& layer) const;
            const ShaderUniforms* GetShaderUniforms(const Shader* shader) const;
            void OnShaderInvalidated(const Shader* shader) const;

            struct LightIndex
            {
                LightType type;
                float score;
                unsigned int index;
            };

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

                // Autre uniformes
                int sceneAmbient;
                int textureOverlay;
            };

            mutable std::unordered_map<const Shader*, ShaderUniforms> m_shaderUniforms;
            Buffer m_vertexBuffer;
            mutable DepthRenderQueue m_renderQueue;
            Texture m_whiteTexture;
            VertexBuffer m_billboardPointBuffer;
            VertexBuffer m_spriteBuffer;

            static IndexBuffer s_quadIndexBuffer;
            static VertexBuffer s_quadVertexBuffer;
            static VertexDeclaration s_billboardInstanceDeclaration;
            static VertexDeclaration s_billboardVertexDeclaration;
    };
}


#include <Nazara/Graphics/DepthRenderTechnique.inl>

#endif // NAZARA_DEPTHRENDERTECHNIQUE_HPP