80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
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// This file is part of the "Nazara Engine - Shader module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_SHADER_AST_DEPENDENCYCHECKERVISITOR_HPP
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#define NAZARA_SHADER_AST_DEPENDENCYCHECKERVISITOR_HPP
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#include <Nazara/Prerequisites.hpp>
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#include <Nazara/Core/Bitset.hpp>
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#include <Nazara/Shader/Config.hpp>
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#include <Nazara/Shader/Ast/AstRecursiveVisitor.hpp>
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namespace Nz::ShaderAst
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{
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class NAZARA_SHADER_API DependencyCheckerVisitor : public AstRecursiveVisitor
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{
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public:
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struct Config;
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struct UsageSet;
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DependencyCheckerVisitor() = default;
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DependencyCheckerVisitor(const DependencyCheckerVisitor&) = delete;
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DependencyCheckerVisitor(DependencyCheckerVisitor&&) = delete;
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~DependencyCheckerVisitor() = default;
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inline const UsageSet& GetUsage() const;
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inline void MarkFunctionAsUsed(std::size_t funcIndex);
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inline void MarkStructAsUsed(std::size_t structIndex);
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inline void Process(Statement& statement);
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void Process(Statement& statement, const Config& config);
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inline void Resolve();
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DependencyCheckerVisitor& operator=(const DependencyCheckerVisitor&) = delete;
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DependencyCheckerVisitor& operator=(DependencyCheckerVisitor&&) = delete;
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struct Config
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{
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ShaderStageTypeFlags usedShaderStages;
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};
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struct UsageSet
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{
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Bitset<> usedFunctions;
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Bitset<> usedStructs;
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Bitset<> usedVariables;
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};
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private:
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void Resolve(const UsageSet& usageSet);
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using AstRecursiveVisitor::Visit;
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void Visit(CallFunctionExpression& node) override;
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void Visit(VariableValueExpression& node) override;
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void Visit(DeclareExternalStatement& node) override;
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void Visit(DeclareFunctionStatement& node) override;
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void Visit(DeclareStructStatement& node) override;
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void Visit(DeclareVariableStatement& node) override;
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std::optional<std::size_t> m_currentFunctionIndex;
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std::optional<std::size_t> m_currentVariableDeclIndex;
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std::unordered_map<std::size_t, UsageSet> m_functionUsages;
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std::unordered_map<std::size_t, UsageSet> m_structUsages;
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std::unordered_map<std::size_t, UsageSet> m_variableUsages;
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Config m_config;
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UsageSet m_globalUsage;
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UsageSet m_resolvedUsage;
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};
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}
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#include <Nazara/Shader/Ast/DependencyCheckerVisitor.inl>
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#endif // NAZARA_SHADER_AST_DEPENDENCYCHECKERVISITOR_HPP
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