RenderGraph.h

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//
// Created by Administrator on 2025/8/10.
//
 
#ifndef RENDERGRAPH_H
#define RENDERGRAPH_H
 
#include "./ResourceManager.h"
#include "../RHI/ImageAspect.h"
#include "../RHI/ImageLayout.h"
#include "../RHI/PipelineStage.h"
#include "../RHI/AccessFlags.h"
 
#include "../ThirdParty.h"
#include "./Format.h"
#include "../Base/TokenGraph.h"
#include "../Base/UnionFind.h"
#include "../RHI/ImageUsageFlags.h"
#include "./ShaderStage.h"
#include "./ClearTypes.h"
#include "Vec.h"
#include "../Base/Graph.h"
#include "./SizeNode.h"
#include "CommandBufferGraph.h"
#include "../Base/UnionFind.h"
#include "../Base/IEventSystem.h"
#include "./FlowControl.h"
#include "./Device.h"
 
namespace FCT
{
    class TextureEdge;
    class Context;
    class Window;
    namespace RHI
    {
        class CommandBuffer;
    }
}
#include "./RenderGraph_EnablePassClear.h"
#include "./RenderGraph_TextureSize.h"
#include "./RenderGraph_Texture.h"
#include "./RenderGraph_Target.h"
#include "./RenderGraph_DepthStencil.h"
#include "./RenderGraph_PassDesc.h"
namespace FCT
{
    class RenderGraphNode
    {
    protected:
        std::string m_name;
    public:
        RenderGraphNode() = default;
        RenderGraphNode(const std::string& name) : m_name(name) {}
    };
 
    class Edge
    {
    public:
 
    };
 
    class TargetEdge : public Edge
    {
    public:
        std::string fromPass;
        std::string toImage;
        uint32_t order;
    };
 
    class DepthStencilEdge : public Edge
    {
    public:
        std::string fromPass;
        std::string toImage;
        uint32_t order;
    };
 
    class RenderGraphImageNode : public SizeNode, public RenderGraphNode
    {
    public:
        RenderGraphImageNode() = default;
        RenderGraphImageNode(const std::string& name) : RenderGraphNode(name), m_targetOrderCounter(0), m_depthStencilOrderCounter(0) {}
        virtual RenderGraphImageNode& operator|=(const Texture& other) = 0;
        virtual RenderGraphImageNode& operator|=(const Target& other) = 0;
        virtual RenderGraphImageNode& operator|=(const DepthStencil& other) = 0;
 
        void addOutgoingEdge(TextureEdge* edge) {
            m_textureOutgoingEdges.push_back(edge);
        }
 
        void addIncomingEdge(TargetEdge* edge) {
            edge->order = m_targetOrderCounter++;
            m_targetIncomingEdges.push_back(edge);
        }
 
        void addIncomingEdge(DepthStencilEdge* edge) {
            edge->order = m_depthStencilOrderCounter++;
            m_depthStencilIncomingEdges.push_back(edge);
        }
 
        const std::vector<TextureEdge*>& getTextureOutgoingEdges() const {
            return m_textureOutgoingEdges;
        }
 
        const std::vector<TargetEdge*>& getTargetIncomingEdges() const {
            return m_targetIncomingEdges;
        }
 
        const std::vector<DepthStencilEdge*>& getDepthStencilIncomingEdges() const {
            return m_depthStencilIncomingEdges;
        }
        virtual Image* getImage() const = 0;
        virtual void fillDefaultData() = 0;
    private:
        std::vector<TextureEdge*> m_textureOutgoingEdges;
        std::vector<TargetEdge*> m_targetIncomingEdges;
        std::vector<DepthStencilEdge*> m_depthStencilIncomingEdges;
        uint32_t m_targetOrderCounter;
        uint32_t m_depthStencilOrderCounter;
    };
}
#include "./RenderGraph_RenderGraphBufferNode.h"
namespace FCT
{
    class RenderGraphPassNode;
    class TextureEdge : public Edge
    {
    public:
        TextureSize size;
        std::string fromImage;
        std::string toPass;
        ShaderStage stage;
    };
 
    class RenderGraphPassNode : public RenderGraphNode
    {
    public:
        RenderGraphPassNode(){}
 
        RenderGraphPassNode(std::string name) : RenderGraphNode(name)
        {
 
        }
 
        void addIncomingEdge(TextureEdge* edge) {
            m_textureIncomingEdges.push_back(edge);
        }
 
        void addOutgoingEdge(TargetEdge* edge) {
            m_targetOutgoingEdges.push_back(edge);
        }
 
        void addOutgoingEdge(DepthStencilEdge* edge) {
            m_depthStencilOutgoingEdges.push_back(edge);
        }
 
        const std::vector<TextureEdge*>& getTextureIncomingEdges() const {
            return m_textureIncomingEdges;
        }
 
        const std::vector<TargetEdge*>& getTargetOutgoingEdges() const {
            return m_targetOutgoingEdges;
        }
 
        const std::vector<DepthStencilEdge*>& getDepthStencilOutgoingEdges() const {
            return m_depthStencilOutgoingEdges;
        }
        void applyPassDesc(const PassDesc& desc) {
            m_clearInfo = desc.clear;
        }
        const EnablePassClear& getClearInfo() const {
            return m_clearInfo;
        }
    private:
        std::vector<TextureEdge*> m_textureIncomingEdges;
        std::vector<TargetEdge*> m_targetOutgoingEdges;
        std::vector<DepthStencilEdge*> m_depthStencilOutgoingEdges;
        EnablePassClear m_clearInfo;
    };
    struct PassSubmitEvent
    {
        std::string passName;
        RHI::CommandBuffer* cmdBuf;
    };
 
    namespace RenderGraphTickers
    {
        constexpr const char* RenderGraphSubmit = "RenderGraphSubmit";
    }
    class RenderGraph : private IEventSystem<EventSystemConfig::TriggerOnly>{
    private:
        uint32_t m_commandBufferIndex = 0;
        CommandBufferToken m_commandBufferToken;
        void initForSubmit();
        void allocateCommandBuffer();
    public:
    private:
        Device* m_resourceDevice;
        FlowControl* m_flowControl;
        CommandBufferGraph* m_commandBufferGraph;
        ResourceManager* m_resourceManager;
    public:
        RenderGraph(Device* device, FlowControl* flowControl, CommandBufferGraph* commandBufferGraph, ResourceManager* resourceManager);
    private:
        struct ImageState {
            ImageLayout currentLayout = ImageLayout::undefined;
            PipelineStage lastStage = PipelineStage::topOfPipe;
            AccessFlag lastAccess = AccessFlag::none;
            std::string lastWriterGroup;
            bool needsBarrier = false;
        };
        struct BarrierInfo {
            Image* image;
            ImageLayout oldLayout;
            ImageLayout newLayout;
            PipelineStage srcStage;
            PipelineStage dstStage;
            AccessFlag srcAccess;
            AccessFlag dstAccess;
            ImageAspect aspect;
        };
        std::unordered_map<std::string, std::vector<BarrierInfo>> m_passGroupBarriers;
        std::map<std::string, std::set<std::string>> m_passGroupDependencies;
        std::unordered_map<std::string, std::unique_ptr<RenderGraphImageNode>> m_imageNodes;
        std::unordered_map<std::string,RenderGraphPassNode> m_passNodes;
        UnionFind<std::string,char> m_passesUnions;
        std::vector<std::unique_ptr<Edge>> m_edges;
        std::unordered_map<std::string, Image*> m_allocatedImages;
        std::unordered_map<std::string, RHI::Pass*> m_allocatedPasses;
        RenderGraphImageNode* getOrCreateImageNode(const std::string& name, const Texture& texture);
        RenderGraphImageNode* getOrCreateImageNode(const std::string& name, const Target& target);
        RenderGraphImageNode* getOrCreateImageNode(const std::string& name, const DepthStencil& depthStencil);
        void createTextureEdge(const std::string& passName, const std::string& textureName, const Texture& texture);
        void createTargetEdge(const std::string& passName, const std::string& targetName, const Target& target);
        void createDepthStencilEdge(const std::string& passName, const std::string& depthStencilName, const DepthStencil& depthStencil);
        void simulatePassGroupExecution(const std::string& groupLeader,
                                   const std::vector<std::string>& groupMembers,
                                   std::unordered_map<Image*, ImageState>& imageStates);
        void simulateExecutionAndAnalyzeBarriers();
        std::vector<BarrierInfo> checkBarriersBeforePassGroup(const std::string& groupLeader,
                                                                const std::vector<std::string>& groupMembers,
                                                                const std::unordered_map<Image*, ImageState>& imageStates);
 
        void executeBarriers(RHI::CommandBuffer* cmdBuffer, const std::vector<BarrierInfo>& barriers);
        void addPass(const PassDesc& desc);
        void cleanUpCompile();
        void cleanUp();
        void resolveTextureSizes();
        void groupPasses();
 
        void allocateResources();
        void createRHIPasses();
        void analyzePassGroupDependencies(const std::string& groupLeader, const std::vector<std::string>& groupMembers,
                                          std::map<std::string, std::set<std::string>>& dependencies) const;
        std::vector<std::string> topologicalSort(const std::map<std::string, std::set<std::string>>& dependencies) const;
        void analyzePassGroupBarriers();
        void computePassGroupExecutionOrder();
        std::unordered_map<std::string, RHI::PassGroup*> m_allocatedPassGroups; // 存储创建的PassGroup
        void createPassGroups();
    public:
        template<typename Func>
        SubscribeId subscribe(std::string passName,Func&& func)
        {
            SubscribeId subId = IEventSystem<EventSystemConfig::TriggerOnly>::subscribe<PassSubmitEvent>([passName, func](const PassSubmitEvent& env)
            {
                if (env.passName == passName)
                {
                    func(env);
                }
            });
            return subId;
        }
        void unsubscribe(SubscribeId subscribeId)
        {
            IEventSystem<EventSystemConfig::TriggerOnly>::unsubscribe(subscribeId);
        }
        template<typename... Args>
        void addPass(std::string name,Args&&... args)
        {
            PassDesc desc(name);
            desc.processArgs(std::forward<Args>(args)...);
            addPass(desc);
        }
        void compile()
        {
            allocateCommandBuffer();
            resolveTextureSizes();
            groupPasses();
            allocateResources();
            createRHIPasses();
            createPassGroups();
            computePassGroupExecutionOrder();
        }
        void executeAllPassGroups(RHI::CommandBuffer* cmdBuffer);
        RHI::Pass* getPass(const std::string& name) const;
        Image* getImage(const std::string& name) const;
        std::vector<TextureEdge*> getTextureEdges(const std::string& passName) const;
    private:
        PipelineStage convertShaderStageToPipelineStage(ShaderStage stage) const;
        std::unordered_map<std::string, std::vector<std::string>> m_passGroupOrders;
        std::vector<std::string> m_passGroupExecutionOrder;
        void submitPassGroup(RHI::CommandBuffer* cmdBuffer,
                             const std::string& groupLeader);
 
    };
 
} // FCT
 
#endif //RENDERGRAPH_H