X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglsl%2Fgenerate.h;h=ddf2b5f629cb0a8aadedd76dd0eab5041dfe1fa4;hb=50ab5ca;hp=63f1b0770ba435b287157eef975514b7e41cab9d;hpb=de87bb70ae10de39a39b2415407a234ab28099cf;p=libs%2Fgl.git

diff --git a/source/glsl/generate.h b/source/glsl/generate.h
index 63f1b077..ddf2b5f6 100644
--- a/source/glsl/generate.h
+++ b/source/glsl/generate.h
@@ -110,6 +110,48 @@ private:
 	virtual void visit(InterfaceBlock &);
 };
 
+/** Resolves types and lvalueness of expressions. */
+class ExpressionResolver: private TraversingVisitor
+{
+private:
+	enum Compatibility
+	{
+		NOT_COMPATIBLE,
+		LEFT_CONVERTIBLE,
+		RIGHT_CONVERTIBLE,
+		SAME_TYPE
+	};
+
+	Stage *stage;
+	std::vector<BasicTypeDeclaration *> basic_types;
+
+public:
+	void apply(Stage &s) { stage = &s; s.content.visit(*this); }
+
+private:
+	static bool is_scalar(BasicTypeDeclaration &);
+	static bool is_vector_or_matrix(BasicTypeDeclaration &);
+	static BasicTypeDeclaration *get_element_type(BasicTypeDeclaration &);
+	static bool can_convert(BasicTypeDeclaration &, BasicTypeDeclaration &);
+	static Compatibility get_compatibility(BasicTypeDeclaration &, BasicTypeDeclaration &);
+	BasicTypeDeclaration *find_type(BasicTypeDeclaration::Kind, unsigned);
+	BasicTypeDeclaration *find_type(BasicTypeDeclaration &, BasicTypeDeclaration::Kind, unsigned);
+	void convert_to(RefPtr<Expression> &, BasicTypeDeclaration &);
+	bool convert_to_element(RefPtr<Expression> &, BasicTypeDeclaration &);
+
+	virtual void visit(Literal &);
+	virtual void visit(ParenthesizedExpression &);
+	virtual void visit(VariableReference &);
+	virtual void visit(InterfaceBlockReference &);
+	virtual void visit(MemberAccess &);
+	virtual void visit(UnaryExpression &);
+	virtual void visit(BinaryExpression &);
+	virtual void visit(Assignment &);
+	virtual void visit(FunctionCall &);
+	virtual void visit(BasicTypeDeclaration &);
+	virtual void visit(VariableDeclaration &);
+};
+
 /** Resolves function declarations and calls. */
 class FunctionResolver: private TraversingVisitor
 {