X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogramcompiler.h;h=f585ba92347ae52e580eec7c5d42ce993fc8c483;hp=978b01e2d159135d3dcf5dbb7b0ef6b4b5bb6c0d;hb=ba97b71564cadd322fe1bf3d8afe556b38ef0647;hpb=961715848c111907b5f443c5b545a429b40583e6

diff --git a/source/programcompiler.h b/source/programcompiler.h
index 978b01e2..f585ba92 100644
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -9,19 +9,36 @@ namespace Msp {
 namespace GL {
 
 class Program;
+class Resources;
 
 class ProgramCompiler
 {
-public:
-	struct Formatter: ProgramSyntax::NodeVisitor
+private:
+	struct Visitor: ProgramSyntax::TraversingVisitor
+	{
+		typedef void ResultType;
+
+		ProgramSyntax::Stage *stage;
+
+		Visitor();
+
+		virtual void apply(ProgramSyntax::Stage &);
+		void get_result() const { }
+	};
+
+	struct Formatter: Visitor
 	{
+		typedef std::string ResultType;
+
 		std::string formatted;
 		unsigned indent;
 		bool parameter_list;
-		bool else_if;
+		unsigned else_if;
+		std::string block_interface;
 
 		Formatter();
 
+		const std::string &get_result() const { return formatted; }
 		virtual void visit(ProgramSyntax::Block &);
 		virtual void visit(ProgramSyntax::Literal &);
 		virtual void visit(ProgramSyntax::ParenthesizedExpression &);
@@ -29,8 +46,10 @@ public:
 		virtual void visit(ProgramSyntax::MemberAccess &);
 		virtual void visit(ProgramSyntax::UnaryExpression &);
 		virtual void visit(ProgramSyntax::BinaryExpression &);
+		virtual void visit(ProgramSyntax::Assignment &);
 		virtual void visit(ProgramSyntax::FunctionCall &);
 		virtual void visit(ProgramSyntax::ExpressionStatement &);
+		virtual void visit(ProgramSyntax::Import &);
 		virtual void visit(ProgramSyntax::Layout &);
 		virtual void visit(ProgramSyntax::StructDeclaration &);
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
@@ -41,38 +60,67 @@ public:
 		virtual void visit(ProgramSyntax::Return &);
 	};
 
-private:
-	struct VariableResolver: ProgramSyntax::TraversingVisitor
+	template<typename T>
+	struct NodeGatherer: Visitor
+	{
+		typedef std::list<T *> ResultType;
+
+		std::list<T *> nodes;
+
+		const ResultType &get_result() const { return nodes; }
+		virtual void visit(T &n) { nodes.push_back(&n); }
+	};
+
+	struct DeclarationCombiner: Visitor
+	{
+		bool toplevel;
+		std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
+		std::map<std::string, ProgramSyntax::VariableDeclaration *> variables;
+		bool remove_node;
+
+		DeclarationCombiner();
+
+		virtual void visit(ProgramSyntax::Block &);
+		virtual void visit(ProgramSyntax::FunctionDeclaration &);
+		virtual void visit(ProgramSyntax::VariableDeclaration &);
+	};
+
+	struct VariableResolver: Visitor
 	{
 		std::vector<ProgramSyntax::Block *> blocks;
 		ProgramSyntax::StructDeclaration *type;
 		bool anonymous;
+		std::string block_interface;
+		bool record_target;
+		ProgramSyntax::VariableDeclaration *assignment_target;
+		bool self_referencing;
 
 		VariableResolver();
 
+		virtual void apply(ProgramSyntax::Stage &);
 		virtual void visit(ProgramSyntax::Block &);
 		virtual void visit(ProgramSyntax::VariableReference &);
 		virtual void visit(ProgramSyntax::MemberAccess &);
 		virtual void visit(ProgramSyntax::BinaryExpression &);
+		virtual void visit(ProgramSyntax::Assignment &);
 		virtual void visit(ProgramSyntax::StructDeclaration &);
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
 		virtual void visit(ProgramSyntax::InterfaceBlock &);
 	};
 
-	struct InterfaceGenerator: ProgramSyntax::TraversingVisitor
+	struct InterfaceGenerator: Visitor
 	{
-		ProgramSyntax::Context *context;
 		std::string in_prefix;
 		std::string out_prefix;
 		unsigned scope_level;
-		std::map<std::string, ProgramSyntax::NodePtr<ProgramSyntax::Node> > iface_declarations;
+		std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
 		bool remove_node;
-		std::list<ProgramSyntax::NodePtr<ProgramSyntax::Node> > insert_nodes;
+		std::list<ProgramSyntax::Node *> insert_nodes;
 
 		InterfaceGenerator();
 
-		static std::string get_out_prefix(ProgramSyntax::ContextType);
-		void visit(ProgramSyntax::Context &);
+		static std::string get_out_prefix(ProgramSyntax::StageType);
+		virtual void apply(ProgramSyntax::Stage &);
 		virtual void visit(ProgramSyntax::Block &);
 		std::string change_prefix(const std::string &, const std::string &) const;
 		bool generate_interface(ProgramSyntax::VariableDeclaration &, const std::string &, const std::string &);
@@ -82,35 +130,95 @@ private:
 		virtual void visit(ProgramSyntax::Passthrough &);
 	};
 
-	struct VariableRenamer: ProgramSyntax::TraversingVisitor
+	struct VariableRenamer: Visitor
 	{
 		virtual void visit(ProgramSyntax::VariableReference &);
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
 	};
 
-	struct UnusedVariableLocator: ProgramSyntax::TraversingVisitor
+	struct ExpressionEvaluator: ProgramSyntax::NodeVisitor
+	{
+		typedef std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Expression *> ValueMap;
+
+		const ValueMap *variable_values;
+		float result;
+		bool result_valid;
+
+		ExpressionEvaluator();
+		ExpressionEvaluator(const ValueMap &);
+
+		virtual void visit(ProgramSyntax::Literal &);
+		virtual void visit(ProgramSyntax::VariableReference &);
+		virtual void visit(ProgramSyntax::UnaryExpression &);
+		virtual void visit(ProgramSyntax::BinaryExpression &);
+	};
+
+	struct ConstantConditionEliminator: Visitor
 	{
-		std::set<ProgramSyntax::VariableDeclaration *> unused_variables;
+		unsigned scope_level;
+		ExpressionEvaluator::ValueMap variable_values;
+		bool remove_node;
+		ProgramSyntax::Block *replacement_block;
 
+		ConstantConditionEliminator();
+
+		virtual void visit(ProgramSyntax::Block &);
+		virtual void visit(ProgramSyntax::Assignment &);
+		virtual void visit(ProgramSyntax::VariableDeclaration &);
+		virtual void visit(ProgramSyntax::Conditional &);
+		virtual void visit(ProgramSyntax::Iteration &);
+	};
+
+	struct UnusedVariableLocator: Visitor
+	{
+		struct AssignmentList
+		{
+			std::vector<ProgramSyntax::Node *> nodes;
+			bool conditional;
+			bool self_referencing;
+		};
+
+		typedef std::set<ProgramSyntax::Node *> ResultType;
+		typedef std::map<ProgramSyntax::VariableDeclaration *, AssignmentList> BlockAssignmentMap;
+
+		std::set<ProgramSyntax::Node *> unused_nodes;
+		std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Node *> aggregates;
+		ProgramSyntax::Node *aggregate;
+		std::vector<BlockAssignmentMap> assignments;
+		ProgramSyntax::Assignment *assignment;
+		bool assignment_target;
+
+		UnusedVariableLocator();
+
+		virtual void apply(ProgramSyntax::Stage &);
+		const ResultType &get_result() const { return unused_nodes; }
 		virtual void visit(ProgramSyntax::VariableReference &);
 		virtual void visit(ProgramSyntax::MemberAccess &);
+		virtual void visit(ProgramSyntax::BinaryExpression &);
+		virtual void visit(ProgramSyntax::Assignment &);
+		void record_assignment(ProgramSyntax::VariableDeclaration &, ProgramSyntax::Node &, bool);
+		virtual void visit(ProgramSyntax::ExpressionStatement &);
+		virtual void visit(ProgramSyntax::StructDeclaration &);
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
+		virtual void visit(ProgramSyntax::InterfaceBlock &);
+		virtual void visit(ProgramSyntax::FunctionDeclaration &);
+		void merge_down_assignments();
+		virtual void visit(ProgramSyntax::Conditional &);
+		virtual void visit(ProgramSyntax::Iteration &);
 	};
 
-	struct NodeRemover: ProgramSyntax::TraversingVisitor
+	struct NodeRemover: Visitor
 	{
 		std::set<ProgramSyntax::Node *> to_remove;
-		unsigned n_removed;
-		bool immutable_block;
-		bool remove_block;
 
-		NodeRemover();
+		NodeRemover() { }
+		NodeRemover(const std::set<ProgramSyntax::Node *> &);
 
 		virtual void visit(ProgramSyntax::Block &);
-		virtual void visit(ProgramSyntax::StructDeclaration &);
-		virtual void visit(ProgramSyntax::InterfaceBlock &);
+		virtual void visit(ProgramSyntax::VariableDeclaration &);
 	};
 
+	Resources *resources;
 	ProgramParser parser;
 	ProgramSyntax::Module *module;
 
@@ -118,15 +226,22 @@ public:
 	ProgramCompiler();
 
 	void compile(const std::string &);
-	void compile(IO::Base &);
+	void compile(IO::Base &, Resources * = 0);
 	void add_shaders(Program &);
 
 private:
+	static ProgramSyntax::Module *create_builtins_module();
+	static ProgramSyntax::Module &get_builtins_module();
+	static ProgramSyntax::Stage *get_builtins(ProgramSyntax::StageType);
 	void process();
-	void process(ProgramSyntax::Context &);
+	void import(const std::string &);
+	void generate(ProgramSyntax::Stage &);
+	bool optimize(ProgramSyntax::Stage &);
 	static void inject_block(ProgramSyntax::Block &, const ProgramSyntax::Block &);
-	static void resolve_variables(ProgramSyntax::Context &);
-	std::string format_context(ProgramSyntax::Context &);
+	template<typename T>
+	static typename T::ResultType apply(ProgramSyntax::Stage &);
+	template<typename T, typename A>
+	static typename T::ResultType apply(ProgramSyntax::Stage &, const A &);
 };
 
 } // namespace GL