784 lines
16 KiB
C++
784 lines
16 KiB
C++
// Copyright (C) 2020 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Shader generator"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Shader/Ast/AstSerializer.hpp>
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#include <Nazara/Shader/Ast/AstExpressionVisitor.hpp>
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#include <Nazara/Shader/Ast/AstStatementVisitor.hpp>
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#include <Nazara/Shader/Debug.hpp>
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namespace Nz::ShaderAst
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{
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namespace
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{
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constexpr UInt32 s_magicNumber = 0x4E534852;
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constexpr UInt32 s_currentVersion = 1;
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class ShaderSerializerVisitor : public AstExpressionVisitor, public AstStatementVisitor
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{
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public:
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ShaderSerializerVisitor(AstSerializerBase& serializer) :
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m_serializer(serializer)
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{
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}
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#define NAZARA_SHADERAST_NODE(Node) void Visit(Node& node) override \
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{ \
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m_serializer.Serialize(node); \
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}
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#include <Nazara/Shader/Ast/AstNodeList.hpp>
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private:
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AstSerializerBase& m_serializer;
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};
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}
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void AstSerializerBase::Serialize(AccessIdentifierExpression& node)
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{
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Node(node.expr);
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Container(node.identifiers);
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for (std::string& identifier : node.identifiers)
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Value(identifier);
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}
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void AstSerializerBase::Serialize(AccessIndexExpression& node)
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{
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Node(node.expr);
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Container(node.indices);
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for (auto& identifier : node.indices)
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Node(identifier);
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}
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void AstSerializerBase::Serialize(AssignExpression& node)
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{
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Enum(node.op);
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Node(node.left);
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Node(node.right);
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}
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void AstSerializerBase::Serialize(BinaryExpression& node)
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{
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Enum(node.op);
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Node(node.left);
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Node(node.right);
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}
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void AstSerializerBase::Serialize(CallFunctionExpression& node)
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{
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UInt32 typeIndex;
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if (IsWriting())
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typeIndex = UInt32(node.targetFunction.index());
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Value(typeIndex);
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// Waiting for template lambda in C++20
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auto SerializeValue = [&](auto dummyType)
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{
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using T = std::decay_t<decltype(dummyType)>;
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auto& value = (IsWriting()) ? std::get<T>(node.targetFunction) : node.targetFunction.emplace<T>();
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Value(value);
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};
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static_assert(std::variant_size_v<decltype(node.targetFunction)> == 2);
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switch (typeIndex)
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{
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case 0: SerializeValue(std::string()); break;
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case 1: SerializeValue(std::size_t()); break;
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}
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Container(node.parameters);
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for (auto& param : node.parameters)
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Node(param);
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}
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void AstSerializerBase::Serialize(CallMethodExpression& node)
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{
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Node(node.object);
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Value(node.methodName);
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Container(node.parameters);
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for (auto& param : node.parameters)
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Node(param);
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}
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void AstSerializerBase::Serialize(CastExpression& node)
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{
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Type(node.targetType);
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for (auto& expr : node.expressions)
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Node(expr);
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}
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void AstSerializerBase::Serialize(ConstantExpression& node)
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{
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SizeT(node.constantId);
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}
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void AstSerializerBase::Serialize(ConditionalExpression& node)
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{
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Node(node.condition);
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Node(node.truePath);
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Node(node.falsePath);
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}
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void AstSerializerBase::Serialize(ConstantValueExpression& node)
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{
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UInt32 typeIndex;
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if (IsWriting())
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typeIndex = UInt32(node.value.index());
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Value(typeIndex);
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// Waiting for template lambda in C++20
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auto SerializeValue = [&](auto dummyType)
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{
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using T = std::decay_t<decltype(dummyType)>;
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auto& value = (IsWriting()) ? std::get<T>(node.value) : node.value.emplace<T>();
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Value(value);
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};
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static_assert(std::variant_size_v<decltype(node.value)> == 11);
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switch (typeIndex)
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{
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case 0: break;
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case 1: SerializeValue(bool()); break;
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case 2: SerializeValue(float()); break;
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case 3: SerializeValue(Int32()); break;
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case 4: SerializeValue(UInt32()); break;
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case 5: SerializeValue(Vector2f()); break;
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case 6: SerializeValue(Vector3f()); break;
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case 7: SerializeValue(Vector4f()); break;
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case 8: SerializeValue(Vector2i32()); break;
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case 9: SerializeValue(Vector3i32()); break;
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case 10: SerializeValue(Vector4i32()); break;
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default: throw std::runtime_error("unexpected data type");
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}
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}
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void AstSerializerBase::Serialize(IdentifierExpression& node)
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{
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Value(node.identifier);
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}
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void AstSerializerBase::Serialize(IntrinsicExpression& node)
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{
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Enum(node.intrinsic);
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Container(node.parameters);
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for (auto& param : node.parameters)
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Node(param);
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}
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void AstSerializerBase::Serialize(SwizzleExpression& node)
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{
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SizeT(node.componentCount);
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Node(node.expression);
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for (std::size_t i = 0; i < node.componentCount; ++i)
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Enum(node.components[i]);
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}
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void AstSerializerBase::Serialize(VariableExpression& node)
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{
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SizeT(node.variableId);
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}
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void AstSerializerBase::Serialize(UnaryExpression& node)
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{
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Enum(node.op);
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Node(node.expression);
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}
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void AstSerializerBase::Serialize(BranchStatement& node)
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{
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Container(node.condStatements);
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for (auto& condStatement : node.condStatements)
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{
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Node(condStatement.condition);
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Node(condStatement.statement);
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}
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Node(node.elseStatement);
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Value(node.isConst);
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}
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void AstSerializerBase::Serialize(ConditionalStatement& node)
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{
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Node(node.condition);
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Node(node.statement);
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}
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void AstSerializerBase::Serialize(DeclareExternalStatement& node)
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{
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OptVal(node.varIndex);
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Attribute(node.bindingSet);
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Container(node.externalVars);
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for (auto& extVar : node.externalVars)
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{
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Value(extVar.name);
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Type(extVar.type);
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Attribute(extVar.bindingIndex);
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Attribute(extVar.bindingSet);
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}
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}
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void AstSerializerBase::Serialize(DeclareConstStatement& node)
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{
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OptVal(node.constIndex);
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Value(node.name);
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Type(node.type);
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Node(node.expression);
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}
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void AstSerializerBase::Serialize(DeclareFunctionStatement& node)
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{
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Value(node.name);
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Type(node.returnType);
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Attribute(node.depthWrite);
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Attribute(node.earlyFragmentTests);
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Attribute(node.entryStage);
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OptVal(node.funcIndex);
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OptVal(node.varIndex);
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Container(node.parameters);
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for (auto& parameter : node.parameters)
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{
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Value(parameter.name);
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Type(parameter.type);
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}
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Container(node.statements);
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for (auto& statement : node.statements)
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Node(statement);
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}
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void AstSerializerBase::Serialize(DeclareOptionStatement& node)
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{
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OptVal(node.optIndex);
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Value(node.optName);
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Type(node.optType);
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Node(node.defaultValue);
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}
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void AstSerializerBase::Serialize(DeclareStructStatement& node)
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{
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OptVal(node.structIndex);
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Value(node.description.name);
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Attribute(node.description.layout);
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Container(node.description.members);
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for (auto& member : node.description.members)
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{
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Value(member.name);
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Type(member.type);
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Attribute(member.builtin);
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Attribute(member.cond);
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Attribute(member.locationIndex);
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}
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}
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void AstSerializerBase::Serialize(DeclareVariableStatement& node)
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{
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OptVal(node.varIndex);
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Value(node.varName);
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Type(node.varType);
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Node(node.initialExpression);
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}
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void AstSerializerBase::Serialize(DiscardStatement& /*node*/)
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{
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/* Nothing to do */
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}
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void AstSerializerBase::Serialize(ExpressionStatement& node)
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{
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Node(node.expression);
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}
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void AstSerializerBase::Serialize(MultiStatement& node)
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{
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Container(node.statements);
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for (auto& statement : node.statements)
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Node(statement);
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}
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void AstSerializerBase::Serialize(NoOpStatement& /*node*/)
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{
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/* Nothing to do */
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}
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void AstSerializerBase::Serialize(ReturnStatement& node)
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{
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Node(node.returnExpr);
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}
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void ShaderAstSerializer::Serialize(StatementPtr& shader)
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{
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m_stream << s_magicNumber << s_currentVersion;
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Node(shader);
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m_stream.FlushBits();
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}
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bool ShaderAstSerializer::IsWriting() const
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{
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return true;
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}
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void ShaderAstSerializer::Node(ExpressionPtr& node)
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{
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NodeType nodeType = (node) ? node->GetType() : NodeType::None;
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m_stream << static_cast<Int32>(nodeType);
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if (node)
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{
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ShaderSerializerVisitor visitor(*this);
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node->Visit(visitor);
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}
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}
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void ShaderAstSerializer::Node(StatementPtr& node)
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{
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NodeType nodeType = (node) ? node->GetType() : NodeType::None;
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m_stream << static_cast<Int32>(nodeType);
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if (node)
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{
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ShaderSerializerVisitor visitor(*this);
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node->Visit(visitor);
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}
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}
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void ShaderAstSerializer::Type(ExpressionType& type)
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{
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std::visit([&](auto&& arg)
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{
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using T = std::decay_t<decltype(arg)>;
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if constexpr (std::is_same_v<T, NoType>)
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m_stream << UInt8(0);
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else if constexpr (std::is_same_v<T, PrimitiveType>)
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{
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m_stream << UInt8(1);
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m_stream << UInt32(arg);
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}
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else if constexpr (std::is_same_v<T, IdentifierType>)
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{
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m_stream << UInt8(2);
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m_stream << arg.name;
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}
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else if constexpr (std::is_same_v<T, MatrixType>)
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{
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m_stream << UInt8(3);
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m_stream << UInt32(arg.columnCount);
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m_stream << UInt32(arg.rowCount);
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m_stream << UInt32(arg.type);
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}
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else if constexpr (std::is_same_v<T, SamplerType>)
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{
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m_stream << UInt8(4);
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m_stream << UInt32(arg.dim);
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m_stream << UInt32(arg.sampledType);
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}
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else if constexpr (std::is_same_v<T, StructType>)
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{
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m_stream << UInt8(5);
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m_stream << UInt32(arg.structIndex);
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}
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else if constexpr (std::is_same_v<T, UniformType>)
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{
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m_stream << UInt8(6);
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m_stream << std::get<IdentifierType>(arg.containedType).name;
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}
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else if constexpr (std::is_same_v<T, VectorType>)
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{
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m_stream << UInt8(7);
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m_stream << UInt32(arg.componentCount);
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m_stream << UInt32(arg.type);
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}
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else
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static_assert(AlwaysFalse<T>::value, "non-exhaustive visitor");
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}, type);
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}
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void ShaderAstSerializer::Value(bool& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(float& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(std::string& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Int32& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Vector2f& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Vector3f& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Vector4f& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Vector2i32& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Vector3i32& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(Vector4i32& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(UInt8& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(UInt16& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(UInt32& val)
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{
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m_stream << val;
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}
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void ShaderAstSerializer::Value(UInt64& val)
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{
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m_stream << val;
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}
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StatementPtr ShaderAstUnserializer::Unserialize()
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{
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UInt32 magicNumber;
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UInt32 version;
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m_stream >> magicNumber;
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if (magicNumber != s_magicNumber)
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throw std::runtime_error("invalid shader file");
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m_stream >> version;
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if (version > s_currentVersion)
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throw std::runtime_error("unsupported version");
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StatementPtr node;
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Node(node);
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if (!node)
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throw std::runtime_error("functions can only have statements");
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return node;
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}
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bool ShaderAstUnserializer::IsWriting() const
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{
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return false;
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}
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void ShaderAstUnserializer::Node(ExpressionPtr& node)
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{
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Int32 nodeTypeInt;
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m_stream >> nodeTypeInt;
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if (nodeTypeInt < static_cast<Int32>(NodeType::None) || nodeTypeInt > static_cast<Int32>(NodeType::Max))
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throw std::runtime_error("invalid node type");
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NodeType nodeType = static_cast<NodeType>(nodeTypeInt);
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switch (nodeType)
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{
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case NodeType::None: break;
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#define NAZARA_SHADERAST_EXPRESSION(Node) case NodeType:: Node : node = std::make_unique<Node>(); break;
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#include <Nazara/Shader/Ast/AstNodeList.hpp>
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default: throw std::runtime_error("unexpected node type");
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}
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if (node)
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{
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ShaderSerializerVisitor visitor(*this);
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node->Visit(visitor);
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}
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}
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void ShaderAstUnserializer::Node(StatementPtr& node)
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{
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Int32 nodeTypeInt;
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m_stream >> nodeTypeInt;
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if (nodeTypeInt < static_cast<Int32>(NodeType::None) || nodeTypeInt > static_cast<Int32>(NodeType::Max))
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throw std::runtime_error("invalid node type");
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NodeType nodeType = static_cast<NodeType>(nodeTypeInt);
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switch (nodeType)
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{
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case NodeType::None: break;
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#define NAZARA_SHADERAST_STATEMENT(Node) case NodeType:: Node : node = std::make_unique<Node>(); break;
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#include <Nazara/Shader/Ast/AstNodeList.hpp>
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default: throw std::runtime_error("unexpected node type");
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}
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if (node)
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{
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ShaderSerializerVisitor visitor(*this);
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node->Visit(visitor);
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}
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}
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void ShaderAstUnserializer::Type(ExpressionType& type)
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{
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UInt8 typeIndex;
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Value(typeIndex);
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switch (typeIndex)
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{
|
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/*
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if constexpr (std::is_same_v<T, NoType>)
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m_stream << UInt8(0);
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else if constexpr (std::is_same_v<T, PrimitiveType>)
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{
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m_stream << UInt8(1);
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m_stream << UInt32(arg);
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}
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else if constexpr (std::is_same_v<T, IdentifierType>)
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{
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m_stream << UInt8(2);
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m_stream << arg.name;
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}
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else if constexpr (std::is_same_v<T, MatrixType>)
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{
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m_stream << UInt8(3);
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m_stream << UInt32(arg.columnCount);
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m_stream << UInt32(arg.rowCount);
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m_stream << UInt32(arg.type);
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}
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else if constexpr (std::is_same_v<T, SamplerType>)
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{
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m_stream << UInt8(4);
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m_stream << UInt32(arg.dim);
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m_stream << UInt32(arg.sampledType);
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}
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else if constexpr (std::is_same_v<T, VectorType>)
|
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{
|
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m_stream << UInt8(5);
|
|
m_stream << UInt32(arg.componentCount);
|
|
m_stream << UInt32(arg.type);
|
|
}
|
|
*/
|
|
|
|
case 0: //< NoType
|
|
type = NoType{};
|
|
break;
|
|
|
|
case 1: //< PrimitiveType
|
|
{
|
|
PrimitiveType primitiveType;
|
|
Enum(primitiveType);
|
|
|
|
type = primitiveType;
|
|
break;
|
|
}
|
|
|
|
case 2: //< Identifier
|
|
{
|
|
std::string identifier;
|
|
Value(identifier);
|
|
|
|
type = IdentifierType{ std::move(identifier) };
|
|
break;
|
|
}
|
|
|
|
case 3: //< MatrixType
|
|
{
|
|
UInt32 columnCount, rowCount;
|
|
PrimitiveType primitiveType;
|
|
Value(columnCount);
|
|
Value(rowCount);
|
|
Enum(primitiveType);
|
|
|
|
type = MatrixType {
|
|
columnCount,
|
|
rowCount,
|
|
primitiveType
|
|
};
|
|
break;
|
|
}
|
|
|
|
case 4: //< SamplerType
|
|
{
|
|
ImageType dim;
|
|
PrimitiveType sampledType;
|
|
Enum(dim);
|
|
Enum(sampledType);
|
|
|
|
type = SamplerType {
|
|
dim,
|
|
sampledType
|
|
};
|
|
break;
|
|
}
|
|
|
|
case 5: //< StructType
|
|
{
|
|
UInt32 structIndex;
|
|
Value(structIndex);
|
|
|
|
type = StructType{
|
|
structIndex
|
|
};
|
|
break;
|
|
}
|
|
|
|
case 6: //< UniformType
|
|
{
|
|
std::string containedType;
|
|
Value(containedType);
|
|
|
|
type = UniformType {
|
|
IdentifierType {
|
|
containedType
|
|
}
|
|
};
|
|
break;
|
|
}
|
|
|
|
case 7: //< VectorType
|
|
{
|
|
UInt32 componentCount;
|
|
PrimitiveType componentType;
|
|
Value(componentCount);
|
|
Enum(componentType);
|
|
|
|
type = VectorType{
|
|
componentCount,
|
|
componentType
|
|
};
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(bool& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(float& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(std::string& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Int32& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Vector2f& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Vector3f& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Vector4f& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Vector2i32& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Vector3i32& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(Vector4i32& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(UInt8& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(UInt16& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(UInt32& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
void ShaderAstUnserializer::Value(UInt64& val)
|
|
{
|
|
m_stream >> val;
|
|
}
|
|
|
|
|
|
ByteArray SerializeShader(StatementPtr& shader)
|
|
{
|
|
ByteArray byteArray;
|
|
ByteStream stream(&byteArray, OpenModeFlags(OpenMode::WriteOnly));
|
|
|
|
ShaderAstSerializer serializer(stream);
|
|
serializer.Serialize(shader);
|
|
|
|
return byteArray;
|
|
}
|
|
|
|
StatementPtr UnserializeShader(ByteStream& stream)
|
|
{
|
|
ShaderAstUnserializer unserializer(stream);
|
|
return unserializer.Unserialize();
|
|
}
|
|
}
|
|
|