Give declaration nodes to all GLSL types.

[libs/gl.git] / source / glsl / generate.h

diff --git a/source/glsl/generate.h b/source/glsl/generate.h
index 6740f38ea5c49e531b9fbbabf9b285e08ea7f24b..d303af3664b3294c74209b6dce738b999c8213ff 100644 (file)
--- a/source/glsl/generate.h
+++ b/source/glsl/generate.h
@@ -11,6 +11,7 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
+/** Combines multiple declarations of the same identifier into one. */
 class DeclarationCombiner: private TraversingVisitor
 {
 private:
@@ -23,29 +24,67 @@ public:
 
 private:
        virtual void visit(Block &);
-       virtual void visit(FunctionDeclaration &);
+       virtual void visit(VariableDeclaration &);
+       virtual void visit(FunctionDeclaration &) { }
+};
+
+/** Manipulates specialization constants.  If values are specified, turns
+specialization constants into normal constants.  Without values assigns
+automatic constant_ids to specialization constants. */
+class ConstantSpecializer: private TraversingVisitor
+{
+private:
+       const std::map<std::string, int> *values;
+
+public:
+       ConstantSpecializer();
+
+       void apply(Stage &, const std::map<std::string, int> *);
+
+private:
        virtual void visit(VariableDeclaration &);
 };
 
-class BlockResolver: private TraversingVisitor
+/** Forms links between nested blocks in the syntax tree. */
+class BlockHierarchyResolver: private TraversingVisitor
 {
 public:
        void apply(Stage &s) { s.content.visit(*this); }
 
 private:
-       virtual void visit(Block &);
-       virtual void visit(InterfaceBlock &);
+       virtual void enter(Block &);
+};
+
+/** Resolves types of variables and base types of other types. */
+class TypeResolver: private TraversingVisitor
+{
+private:
+       Stage *stage;
+
+public:
+       TypeResolver();
+
+       void apply(Stage &);
+
+private:
+       virtual void visit(BasicTypeDeclaration &);
+       virtual void visit(ImageTypeDeclaration &);
+       virtual void visit(StructDeclaration &);
+       virtual void visit(VariableDeclaration &);
 };
 
+/** Resolves variable references.  Variable references which match the name
+of an interface block are turned into interface block references. */
 class VariableResolver: private TraversingVisitor
 {
 private:
-       Block *builtins;
-       StructDeclaration *type;
+       Stage *stage;
+       std::map<std::string, VariableDeclaration *> *r_members;
+       RefPtr<InterfaceBlockReference> r_iface_ref;
        std::string block_interface;
        bool record_target;
-       VariableDeclaration *assignment_target;
-       bool self_referencing;
+       bool r_self_referencing;
+       VariableDeclaration *r_assignment_target;
 
 public:
        VariableResolver();
@@ -53,39 +92,51 @@ public:
        void apply(Stage &);
 
 private:
-       Block *next_block(Block &);
-
-       virtual void visit(Block &);
+       virtual void enter(Block &);
        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(StructDeclaration &);
+       virtual void visit(FunctionCall &);
        virtual void visit(VariableDeclaration &);
        virtual void visit(InterfaceBlock &);
-       virtual void visit(FunctionDeclaration &);
-       virtual void visit(Iteration &);
 };
 
+/** Resolves function declarations and calls. */
 class FunctionResolver: private TraversingVisitor
 {
 private:
-       std::map<std::string, std::vector<FunctionDeclaration *> > functions;
+       Stage *stage;
+       std::map<std::string, std::vector<FunctionDeclaration *> > declarations;
 
 public:
-       void apply(Stage &s) { s.content.visit(*this); }
+       void apply(Stage &);
 
 private:
        virtual void visit(FunctionCall &);
        virtual void visit(FunctionDeclaration &);
 };
 
+/** Materializes implicitly declared interfaces.
+
+Out variable declarations inside functions are moved to the global scope.
+
+Passthrough statements are processed, generating out variables to match in
+variables and copying values.
+
+Unresolved variables are looked up in the previous stage's out variables. */
 class InterfaceGenerator: private TraversingVisitor
 {
 private:
        Stage *stage;
        std::string in_prefix;
        std::string out_prefix;
+       bool function_scope;
+       InterfaceBlock *iface_block;
+       bool copy_block;
+       Block *iface_target_block;
        NodeList<Statement>::iterator iface_insert_point;
        NodeList<Statement>::iterator assignment_insert_point;
        std::set<Node *> nodes_to_remove;
@@ -99,42 +150,14 @@ private:
        static std::string get_out_prefix(Stage::Type);
        std::string change_prefix(const std::string &, const std::string &) const;
        virtual void visit(Block &);
-       bool generate_interface(VariableDeclaration &, const std::string &, const std::string &);
+       VariableDeclaration *generate_interface(VariableDeclaration &, const std::string &, const std::string &);
+       InterfaceBlock *generate_interface(InterfaceBlock &);
        ExpressionStatement &insert_assignment(const std::string &, Expression *);
        virtual void visit(VariableReference &);
        virtual void visit(VariableDeclaration &);
-       virtual void visit(Passthrough &);
-};
-
-class DeclarationReorderer: private TraversingVisitor
-{
-private:
-       enum DeclarationKind
-       {
-               NO_DECLARATION,
-               LAYOUT,
-               STRUCT,
-               VARIABLE,
-               FUNCTION
-       };
-
-       DeclarationKind kind;
-       std::set<Node *> ordered_funcs;
-       std::set<Node *> needed_funcs;
-
-public:
-       DeclarationReorderer();
-
-       void apply(Stage &s) { s.content.visit(*this); }
-
-private:
-       virtual void visit(Block &);
-       virtual void visit(FunctionCall &);
-       virtual void visit(InterfaceLayout &) { kind = LAYOUT; }
-       virtual void visit(StructDeclaration &) { kind = STRUCT; }
-       virtual void visit(VariableDeclaration &);
-       virtual void visit(InterfaceBlock &) { kind = VARIABLE; }
+       virtual void visit(InterfaceBlock &);
        virtual void visit(FunctionDeclaration &);
+       virtual void visit(Passthrough &);
 };
 
 } // namespace SL