GraphicsPipelineAsset.hpp

#pragma once
 
#include <string>
#include <vector>
 
#include <Common/Buffer.hpp>
#include <Common/HashedString.hpp>
#include <Common/Graphics/Core.hpp>
#include <Common/Graphics/GraphicsPipeline.hpp>
#include <EngineCore/Assets/Asset.hpp>
#include <EngineCore/Assets/Textures/TextureAsset.hpp>
#include <EngineCore/EngineCore.hpp>
 
#include "PipelineAsset.hpp"
 
namespace Grindstone {
    namespace GraphicsAPI {
        class GraphicsPipeline;
        class DescriptorSetLayout;
    }
 
    struct GraphicsPipelineAsset : public Asset {
        constexpr static size_t noMaterialBufferIndex = SIZE_MAX;
 
        GraphicsPipelineAsset(Uuid uuid) : Asset(uuid, uuid.ToString()) {}
        
        // TODO: Support Configurations
        struct Pass {
            std::string passDebugName;
            std::string passPipelineName;
            Grindstone::HashedString renderQueue;
            GraphicsAPI::PipelineLayout* pipelineLayout = nullptr;
            GraphicsAPI::GraphicsPipeline::PipelineData pipelineData;
            std::array<Grindstone::Buffer, GraphicsAPI::numShaderGraphicStage> stageBuffers;
            std::array<GraphicsAPI::ShaderStage, GraphicsAPI::numShaderGraphicStage> stageTypes;
            std::array<GraphicsAPI::GraphicsPipeline::AttachmentData, 8> colorAttachmentData;
        };
 
        struct MetaData {
            std::vector<Grindstone::PipelineAssetMetaData::Buffer> buffers;
 
            // Images and Samplers
            std::vector<Grindstone::PipelineAssetMetaData::ResourceSlot> resources;
 
            size_t materialBufferIndex = SIZE_MAX;
        };
 
        MetaData metaData;
        std::vector<Pass> passes;
 
        const Grindstone::PipelineAssetMetaData::Buffer* GetBufferMetaData() const {
            if (metaData.materialBufferIndex == SIZE_MAX) {
                return nullptr;
            }
 
            return &(metaData.buffers[metaData.materialBufferIndex]);
        }
 
        const Grindstone::PipelineAssetMetaData::ResourceSlot& GetTextureMetaDataByIndex(size_t index) const {
            return metaData.resources[index];
        }
 
        size_t GetTextureMetaDataSize() const {
            return metaData.resources.size();
        }
 
        const Grindstone::GraphicsAPI::DescriptorSetLayout* GetMaterialDescriptorLayout() const {
            if (passes.size() == 0) {
                return nullptr;
            }
 
            return passes[0].pipelineLayout->descriptorSetLayouts[1];
        }
 
        const Grindstone::GraphicsPipelineAsset::Pass* GetFirstPass() const {
            if (passes.size() == 0) {
                return nullptr;
            }
 
            return &passes[0];
        }
 
        const Grindstone::GraphicsAPI::GraphicsPipeline::PipelineData* GetFirstPassPipelineData() const {
            if (passes.size() == 0) {
                return nullptr;
            }
 
            return &passes[0].pipelineData;
        }
 
        Grindstone::GraphicsAPI::GraphicsPipeline* GetFirstPassPipeline(const Grindstone::GraphicsAPI::VertexInputLayout* vertexInputLayout) {
            if (passes.size() == 0) {
                return nullptr;
            }
 
            auto& pass = passes[0];
            return GetPassPipeline(pass, vertexInputLayout);
        }
 
        Grindstone::GraphicsAPI::PipelineLayout* GetFirstPassPipelineLayout() {
            if (passes.size() == 0) {
                return nullptr;
            }
 
            auto& pass = passes[0];
            return pass.pipelineLayout;
        }
 
        Grindstone::GraphicsAPI::PipelineLayout* GetPassPipelineLayout(Grindstone::HashedString renderQueue) {
            const Grindstone::GraphicsPipelineAsset::Pass* selectedPass = GetPassByRenderQueue(renderQueue);
 
            if (selectedPass == nullptr) {
                return nullptr;
            }
 
            auto& pass = passes[0];
            return pass.pipelineLayout;
        }
 
        Grindstone::GraphicsAPI::GraphicsPipeline* GetPassPipelineByRenderQueue(Grindstone::HashedString renderQueue, const Grindstone::GraphicsAPI::VertexInputLayout* vertexInputLayout) const {
            const Grindstone::GraphicsPipelineAsset::Pass* selectedPass = GetPassByRenderQueue(renderQueue);
 
            if (selectedPass == nullptr) {
                return nullptr;
            }
 
            return GetPassPipeline(*selectedPass, vertexInputLayout);
        }
 
        Grindstone::GraphicsAPI::GraphicsPipeline* GetPassPipelineByName(std::string name, const Grindstone::GraphicsAPI::VertexInputLayout* vertexInputLayout) const {
            const Grindstone::GraphicsPipelineAsset::Pass* selectedPass = GetPassByName(name);
 
            if (selectedPass == nullptr) {
                return nullptr;
            }
 
            return GetPassPipeline(*selectedPass, vertexInputLayout);
        }
 
        Grindstone::GraphicsAPI::GraphicsPipeline* GetPassPipeline(const Grindstone::GraphicsPipelineAsset::Pass& pass, const Grindstone::GraphicsAPI::VertexInputLayout* vertexInputLayout) const {
            std::vector<Grindstone::GraphicsAPI::GraphicsPipeline::ShaderStageData> stages;
            stages.resize(pass.pipelineData.shaderStageCreateInfoCount);
 
            for (size_t stageIndex = 0; stageIndex < pass.pipelineData.shaderStageCreateInfoCount; ++stageIndex) {
                stages[stageIndex].content = reinterpret_cast<const char*>(pass.stageBuffers[stageIndex].Get());
                stages[stageIndex].size = static_cast<uint32_t>(pass.stageBuffers[stageIndex].GetCapacity());
                stages[stageIndex].type = pass.stageTypes[stageIndex];
            }
 
            GraphicsAPI::PipelineLayout* pipelineLayout = pass.pipelineLayout;
            GraphicsAPI::GraphicsPipeline::PipelineData pipelineData = pass.pipelineData;
            pipelineData.debugName = pass.passDebugName.c_str();
            pipelineData.colorAttachmentData = pass.colorAttachmentData.data();
            pipelineData.shaderStageCreateInfos = stages.data();
 
            Grindstone::GraphicsAPI::Core* graphicsCore = Grindstone::EngineCore::GetInstance().GetGraphicsCore();
            return graphicsCore->GetOrCreateGraphicsPipelineFromCache(pipelineLayout, pipelineData, vertexInputLayout);
        }
 
        const Grindstone::GraphicsPipelineAsset::Pass* GetPassByName(std::string name) const {
            for (const Grindstone::GraphicsPipelineAsset::Pass& pass : passes) {
                if (pass.passPipelineName == name) {
                    return &pass;
                }
            }
 
            return nullptr;
        }
 
        const Grindstone::GraphicsPipelineAsset::Pass* GetPassByRenderQueue(Grindstone::HashedString renderQueue) const {
            for (const Grindstone::GraphicsPipelineAsset::Pass& pass : passes) {
                if (pass.renderQueue == renderQueue) {
                    return &pass;
                }
            }
 
            return nullptr;
        }
 
        DEFINE_ASSET_TYPE("Graphics PipelineSet", AssetType::GraphicsPipelineSet)
    };
}