Inject builtins into the module

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

diff --git a/source/glsl/generate.h b/source/glsl/generate.h
index a09c552f1fd9f05c5329edabae112ece237017b0..977ed156f4490ab9e282b328d59c6c88074db3f2 100644 (file)
--- a/source/glsl/generate.h
+++ b/source/glsl/generate.h
@@ -11,28 +11,58 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
-class DeclarationCombiner: public BlockModifier
+/** Combines multiple declarations of the same identifier into one. */
+class DeclarationCombiner: private TraversingVisitor
 {
 private:
-       bool toplevel;
        std::map<std::string, std::vector<FunctionDeclaration *> > functions;
        std::map<std::string, VariableDeclaration *> variables;
+       std::set<Node *> nodes_to_remove;
 
 public:
-       DeclarationCombiner();
+       void apply(Stage &);
 
-       using StageVisitor::visit;
+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 &);
+};
+
+/** 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 enter(Block &);
 };
 
-class VariableResolver: public StageVisitor
+/** Resolves variable references.  Variable references which match the name
+of an interface block are turned into interface block references. */
+class VariableResolver: private TraversingVisitor
 {
 private:
-       std::vector<Block *> blocks;
-       StructDeclaration *type;
-       bool anonymous;
+       Stage *stage;
+       std::map<std::string, VariableDeclaration *> *members;
+       RefPtr<InterfaceBlockReference> iface_ref;
        std::string block_interface;
        bool record_target;
        VariableDeclaration *assignment_target;
@@ -41,10 +71,12 @@ private:
 public:
        VariableResolver();
 
-       virtual void apply(Stage &);
-       using StageVisitor::visit;
-       virtual void visit(Block &);
+       void apply(Stage &);
+
+private:
+       virtual void enter(Block &);
        virtual void visit(VariableReference &);
+       virtual void visit(InterfaceBlockReference &);
        virtual void visit(MemberAccess &);
        virtual void visit(BinaryExpression &);
        virtual void visit(Assignment &);
@@ -53,41 +85,65 @@ public:
        virtual void visit(InterfaceBlock &);
 };
 
-class FunctionResolver: public StageVisitor
+/** 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:
-       using StageVisitor::visit;
+       void apply(Stage &);
+
+private:
        virtual void visit(FunctionCall &);
        virtual void visit(FunctionDeclaration &);
 };
 
-class InterfaceGenerator: public BlockModifier
+/** 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;
-       unsigned scope_level;
-       std::map<std::string, RefPtr<VariableDeclaration> > iface_declarations;
+       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;
 
 public:
        InterfaceGenerator();
 
+       void apply(Stage &);
+
+private:
        static std::string get_out_prefix(Stage::Type);
-       virtual void apply(Stage &);
-       using StageVisitor::visit;
-       virtual void visit(Block &);
        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 &);
+       bool generate_interface(InterfaceBlock &);
        ExpressionStatement &insert_assignment(const std::string &, Expression *);
        virtual void visit(VariableReference &);
        virtual void visit(VariableDeclaration &);
+       virtual void visit(InterfaceBlock &);
+       virtual void visit(FunctionDeclaration &);
        virtual void visit(Passthrough &);
 };
 
-class DeclarationReorderer: public StageVisitor
+/** Reorders declarations to ensure that declarations always appear before
+references. */
+class DeclarationReorderer: private TraversingVisitor
 {
 private:
        enum DeclarationKind
@@ -99,7 +155,6 @@ private:
                FUNCTION
        };
 
-       unsigned scope_level;
        DeclarationKind kind;
        std::set<Node *> ordered_funcs;
        std::set<Node *> needed_funcs;
@@ -107,7 +162,9 @@ private:
 public:
        DeclarationReorderer();
 
-       using StageVisitor::visit;
+       void apply(Stage &s) { s.content.visit(*this); }
+
+private:
        virtual void visit(Block &);
        virtual void visit(FunctionCall &);
        virtual void visit(InterfaceLayout &) { kind = LAYOUT; }