X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fprogramcompiler.h;h=8681d3638a032cabd389879922fe7378c4a45a76;hb=f1c6ef565577ac322693255d764eea1f2cab9e77;hp=a2dd9401256a34c7659800765f8cf25ca56a8313;hpb=a048354f5be808c97d92504f9e618f6f5558ce1e;p=libs%2Fgl.git

diff --git a/source/programcompiler.h b/source/programcompiler.h
index a2dd9401..8681d363 100644
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -9,21 +9,27 @@ namespace Msp {
 namespace GL {
 
 class Program;
+class Resources;
 
 class ProgramCompiler
 {
 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;
@@ -32,6 +38,7 @@ private:
 
 		Formatter();
 
+		const std::string &get_result() const { return formatted; }
 		virtual void visit(ProgramSyntax::Block &);
 		virtual void visit(ProgramSyntax::Literal &);
 		virtual void visit(ProgramSyntax::ParenthesizedExpression &);
@@ -42,6 +49,7 @@ private:
 		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 &);
@@ -52,6 +60,31 @@ private:
 		virtual void visit(ProgramSyntax::Return &);
 	};
 
+	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;
@@ -75,6 +108,14 @@ private:
 		virtual void visit(ProgramSyntax::InterfaceBlock &);
 	};
 
+	struct FunctionResolver: Visitor
+	{
+		std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
+
+		virtual void visit(ProgramSyntax::FunctionCall &);
+		virtual void visit(ProgramSyntax::FunctionDeclaration &);
+	};
+
 	struct InterfaceGenerator: Visitor
 	{
 		std::string in_prefix;
@@ -103,6 +144,39 @@ private:
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
 	};
 
+	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
+	{
+		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
@@ -112,6 +186,7 @@ private:
 			bool self_referencing;
 		};
 
+		typedef std::set<ProgramSyntax::Node *> ResultType;
 		typedef std::map<ProgramSyntax::VariableDeclaration *, AssignmentList> BlockAssignmentMap;
 
 		std::set<ProgramSyntax::Node *> unused_nodes;
@@ -124,6 +199,7 @@ private:
 		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 &);
@@ -139,14 +215,30 @@ private:
 		virtual void visit(ProgramSyntax::Iteration &);
 	};
 
+	struct UnusedFunctionLocator: Visitor
+	{
+		typedef std::set<ProgramSyntax::Node *> ResultType;
+
+		std::set<ProgramSyntax::Node *> unused_nodes;
+		std::set<ProgramSyntax::FunctionDeclaration *> used_definitions;
+
+		const ResultType &get_result() const { return unused_nodes; }
+		virtual void visit(ProgramSyntax::FunctionCall &);
+		virtual void visit(ProgramSyntax::FunctionDeclaration &);
+	};
+
 	struct NodeRemover: Visitor
 	{
 		std::set<ProgramSyntax::Node *> to_remove;
 
+		NodeRemover() { }
+		NodeRemover(const std::set<ProgramSyntax::Node *> &);
+
 		virtual void visit(ProgramSyntax::Block &);
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
 	};
 
+	Resources *resources;
 	ProgramParser parser;
 	ProgramSyntax::Module *module;
 
@@ -154,7 +246,7 @@ public:
 	ProgramCompiler();
 
 	void compile(const std::string &);
-	void compile(IO::Base &);
+	void compile(IO::Base &, Resources * = 0);
 	void add_shaders(Program &);
 
 private:
@@ -162,12 +254,14 @@ private:
 	static ProgramSyntax::Module &get_builtins_module();
 	static ProgramSyntax::Stage *get_builtins(ProgramSyntax::StageType);
 	void process();
+	void import(const std::string &);
 	void generate(ProgramSyntax::Stage &);
 	bool optimize(ProgramSyntax::Stage &);
 	static void inject_block(ProgramSyntax::Block &, const ProgramSyntax::Block &);
 	template<typename T>
-	static void apply(ProgramSyntax::Stage &);
-	std::string create_source(ProgramSyntax::Stage &);
+	static typename T::ResultType apply(ProgramSyntax::Stage &);
+	template<typename T, typename A>
+	static typename T::ResultType apply(ProgramSyntax::Stage &, const A &);
 };
 
 } // namespace GL