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Shader: Add support for depth_write and early_fragment_tests attributes (+ FragDepth builtin)

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This commit is contained in:
Jérôme Leclercq
2021-06-01 12:32:24 +02:00
parent 465837ff12
commit 16e2f5f819
12 changed files with 456 additions and 136 deletions
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22
include/Nazara/Shader/Ast/SanitizeVisitor.hpp
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@@ -8,6 +8,7 @@
#define NAZARA_SHADERAST_TRANSFORMVISITOR_HPP
#include <Nazara/Prerequisites.hpp>
#include <Nazara/Core/Bitset.hpp>
#include <Nazara/Shader/Config.hpp>
#include <Nazara/Shader/Ast/AstCloner.hpp>
#include <unordered_map>
@@ -39,6 +40,7 @@ namespace Nz::ShaderAst
};
private:
struct FunctionData;
struct Identifier;
const ExpressionType& CheckField(const ExpressionType& structType, const std::string* memberIdentifier, std::size_t remainingMembers, std::size_t* structIndices);
@@ -65,6 +67,7 @@ namespace Nz::ShaderAst
StatementPtr Clone(DeclareOptionStatement& node) override;
StatementPtr Clone(DeclareStructStatement& node) override;
StatementPtr Clone(DeclareVariableStatement& node) override;
StatementPtr Clone(DiscardStatement& node) override;
StatementPtr Clone(ExpressionStatement& node) override;
StatementPtr Clone(MultiStatement& node) override;
@@ -78,12 +81,18 @@ namespace Nz::ShaderAst
void PushScope();
void PopScope();
std::size_t RegisterFunction(DeclareFunctionStatement* funcDecl);
std::size_t DeclareFunction(DeclareFunctionStatement* funcDecl);
void PropagateFunctionFlags(std::size_t funcIndex, FunctionFlags flags, Bitset<>& seen);
FunctionData& RegisterFunction(std::size_t functionIndex);
std::size_t RegisterIntrinsic(std::string name, IntrinsicType type);
std::size_t RegisterOption(std::string name, ExpressionType type);
std::size_t RegisterStruct(std::string name, StructDescription description);
std::size_t RegisterVariable(std::string name, ExpressionType type);
void ResolveFunctions();
std::size_t ResolveStruct(const ExpressionType& exprType);
std::size_t ResolveStruct(const IdentifierType& identifierType);
std::size_t ResolveStruct(const StructType& structType);
@@ -95,6 +104,14 @@ namespace Nz::ShaderAst
void Validate(CallFunctionExpression& node, const DeclareFunctionStatement* referenceDeclaration);
void Validate(IntrinsicExpression& node);
struct FunctionData
{
Bitset<> calledByFunctions;
DeclareFunctionStatement* node;
FunctionFlags flags;
bool defined = false;
};
struct Identifier
{
enum class Type
@@ -112,9 +129,8 @@ namespace Nz::ShaderAst
Type type;
};
std::unordered_map<std::string /*functionName*/, std::pair<const DeclareFunctionStatement*, std::size_t>> m_functionDeclarations;
std::vector<Identifier> m_identifiersInScope;
std::vector<DeclareFunctionStatement*> m_functions;
std::vector<FunctionData> m_functions;
std::vector<IntrinsicType> m_intrinsics;
std::vector<ExpressionType> m_options;
std::vector<StructDescription> m_structs;