DeferredRenderQueue.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_DEFERREDRENDERQUEUE_HPP
#define NAZARA_DEFERREDRENDERQUEUE_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Graphics/ForwardRenderQueue.hpp>
#include <Nazara/Graphics/Material.hpp>
#include <Nazara/Math/Box.hpp>
#include <Nazara/Math/Matrix4.hpp>
#include <Nazara/Utility/IndexBuffer.hpp>
#include <Nazara/Utility/MeshData.hpp>
#include <Nazara/Utility/VertexBuffer.hpp>
#include <map>

namespace Nz
{
    class NAZARA_GRAPHICS_API DeferredRenderQueue : public AbstractRenderQueue
    {
        public:
            DeferredRenderQueue(ForwardRenderQueue* forwardQueue);
            ~DeferredRenderQueue() = default;

            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const Vector2f> sizePtr, SparsePtr<const Vector2f> sinCosPtr = nullptr, SparsePtr<const Color> colorPtr = nullptr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const Vector2f> sizePtr, SparsePtr<const Vector2f> sinCosPtr, SparsePtr<const float> alphaPtr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const Vector2f> sizePtr, SparsePtr<const float> anglePtr, SparsePtr<const Color> colorPtr = nullptr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const Vector2f> sizePtr, SparsePtr<const float> anglePtr, SparsePtr<const float> alphaPtr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const float> sizePtr, SparsePtr<const Vector2f> sinCosPtr = nullptr, SparsePtr<const Color> colorPtr = nullptr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const float> sizePtr, SparsePtr<const Vector2f> sinCosPtr, SparsePtr<const float> alphaPtr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const float> sizePtr, SparsePtr<const float> anglePtr, SparsePtr<const Color> colorPtr = nullptr) override;
            void AddBillboards(int renderOrder, const Material* material, unsigned int count, SparsePtr<const Vector3f> positionPtr, SparsePtr<const float> sizePtr, SparsePtr<const float> anglePtr, SparsePtr<const float> alphaPtr) override;
            void AddDrawable(int renderOrder, const Drawable* drawable) override;
            void AddMesh(int renderOrder, const Material* material, const MeshData& meshData, const Boxf& meshAABB, const Matrix4f& transformMatrix) override;
            void AddSprites(int renderOrder, const Material* material, const VertexStruct_XYZ_Color_UV* vertices, std::size_t spriteCount, const Texture* overlay = nullptr) override;

            void Clear(bool fully = false) override;

            struct MeshInstanceEntry
            {
                NazaraSlot(IndexBuffer, OnIndexBufferRelease, indexBufferReleaseSlot);
                NazaraSlot(VertexBuffer, OnVertexBufferRelease, vertexBufferReleaseSlot);

                std::vector<Matrix4f> instances;
            };

            typedef std::map<MeshData, MeshInstanceEntry, ForwardRenderQueue::MeshDataComparator> MeshInstanceContainer;

            struct BatchedModelEntry
            {
                NazaraSlot(Material, OnMaterialRelease, materialReleaseSlot);

                MeshInstanceContainer meshMap;
                bool enabled = false;
            };

            typedef std::map<const Material*, BatchedModelEntry, ForwardRenderQueue::MaterialComparator> MeshMaterialBatches;

            struct BatchedMaterialEntry
            {
                std::size_t maxInstanceCount = 0;
                MeshMaterialBatches materialMap;
            };

            typedef std::map<const MaterialPipeline*, BatchedMaterialEntry, ForwardRenderQueue::MaterialPipelineComparator> MeshPipelineBatches;

            struct Layer
            {
                MeshPipelineBatches opaqueModels;
                unsigned int clearCount = 0;
            };

            std::map<int, Layer> layers;

        private:
            Layer& GetLayer(unsigned int i); 

            ForwardRenderQueue* m_forwardQueue;

            void OnIndexBufferInvalidation(const IndexBuffer* indexBuffer);
            void OnMaterialInvalidation(const Material* material);
            void OnVertexBufferInvalidation(const VertexBuffer* vertexBuffer);
    };
}

#endif // NAZARA_DEFERREDRENDERQUEUE_HPP