X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglsl%2Fresolve.h;fp=source%2Fglsl%2Fresolve.h;h=ca9c4f3231f8416c69b493ba1a0a218ea200e135;hb=bbe2fb7bc1384d7683f1795b5cfa9168df18c580;hp=0000000000000000000000000000000000000000;hpb=b19f8f1c9cfc351cc3aeea3f97a5f8640dd947e2;p=libs%2Fgl.git

diff --git a/source/glsl/resolve.h b/source/glsl/resolve.h
new file mode 100644
index 00000000..ca9c4f32
--- /dev/null
+++ b/source/glsl/resolve.h
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+#ifndef MSP_GL_SL_RESOLVE_H_
+#define MSP_GL_SL_RESOLVE_H_
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include "visitor.h"
+
+namespace Msp {
+namespace GL {
+namespace SL {
+
+/** Forms links between nested blocks in the syntax tree. */
+class BlockHierarchyResolver: private TraversingVisitor
+{
+private:
+	bool r_any_resolved;
+
+public:
+	BlockHierarchyResolver(): r_any_resolved(false) { }
+
+	bool apply(Stage &s) { r_any_resolved = false; s.content.visit(*this); return r_any_resolved; }
+
+private:
+	virtual void enter(Block &);
+};
+
+/** Resolves types of variables and base types of other types. */
+class TypeResolver: private TraversingVisitor
+{
+private:
+	Stage *stage;
+	std::map<TypeDeclaration *, TypeDeclaration *> alias_map;
+	std::map<TypeDeclaration *, TypeDeclaration *> array_types;
+	NodeList<Statement>::iterator type_insert_point;
+	InterfaceBlock *iface_block;
+	bool r_any_resolved;
+
+public:
+	TypeResolver();
+
+	bool apply(Stage &);
+
+private:
+	TypeDeclaration *get_or_create_array_type(TypeDeclaration &);
+	void resolve_type(TypeDeclaration *&, const std::string &, bool);
+	virtual void visit(Block &);
+	virtual void visit(BasicTypeDeclaration &);
+	virtual void visit(ImageTypeDeclaration &);
+	virtual void visit(StructDeclaration &);
+	virtual void visit(VariableDeclaration &);
+	virtual void visit(InterfaceBlock &);
+	virtual void visit(FunctionDeclaration &);
+};
+
+/** Resolves variable references.  Variable references which match the name
+of an interface block are turned into interface block references. */
+class VariableResolver: private TraversingVisitor
+{
+private:
+	Stage *stage;
+	RefPtr<Expression> r_replacement_expr;
+	bool r_any_resolved;
+	bool record_target;
+	bool r_self_referencing;
+	Assignment::Target r_assignment_target;
+	std::vector<VariableDeclaration *> redeclared_builtins;
+	std::set<Node *> nodes_to_remove;
+
+public:
+	VariableResolver();
+
+	bool apply(Stage &);
+
+private:
+	virtual void enter(Block &);
+	virtual void visit(RefPtr<Expression> &);
+	void check_assignment_target(Statement *);
+	virtual void visit(VariableReference &);
+	virtual void visit(InterfaceBlockReference &);
+	void add_to_chain(Assignment::Target::ChainType, unsigned);
+	virtual void visit(MemberAccess &);
+	virtual void visit(Swizzle &);
+	virtual void visit(BinaryExpression &);
+	virtual void visit(Assignment &);
+	void merge_layouts(Layout &, const Layout &);
+	virtual void visit(VariableDeclaration &);
+	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
+	};
+
+	struct ArgumentInfo
+	{
+		BasicTypeDeclaration *type;
+		unsigned component_count;
+	};
+
+	Stage *stage;
+	std::vector<BasicTypeDeclaration *> basic_types;
+	NodeList<Statement>::iterator insert_point;
+	bool r_any_resolved;
+
+public:
+	ExpressionResolver();
+
+	bool apply(Stage &);
+
+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 &);
+	bool truncate_vector(RefPtr<Expression> &, unsigned);
+	void resolve(Expression &, TypeDeclaration *, bool);
+
+	virtual void visit(Block &);
+	virtual void visit(Literal &);
+	virtual void visit(VariableReference &);
+	virtual void visit(InterfaceBlockReference &);
+	virtual void visit(MemberAccess &);
+	virtual void visit(Swizzle &);
+	virtual void visit(UnaryExpression &);
+	void visit(BinaryExpression &, bool);
+	virtual void visit(BinaryExpression &);
+	virtual void visit(Assignment &);
+	virtual void visit(TernaryExpression &);
+	void visit_constructor(FunctionCall &);
+	virtual void visit(FunctionCall &);
+	virtual void visit(BasicTypeDeclaration &);
+	virtual void visit(VariableDeclaration &);
+};
+
+/** Resolves function declarations and calls. */
+class FunctionResolver: private TraversingVisitor
+{
+private:
+	Stage *stage;
+	std::map<std::string, std::vector<FunctionDeclaration *> > declarations;
+	bool r_any_resolved;
+
+public:
+	bool apply(Stage &);
+
+private:
+	virtual void visit(FunctionCall &);
+	virtual void visit(FunctionDeclaration &);
+};
+
+} // namespace SL
+} // namespace GL
+} // namespace Msp
+
+#endif