Refactor block modification operations into an intermediate base class

[libs/gl.git] / source / programcompiler.h

diff --git a/source/programcompiler.h b/source/programcompiler.h
index 2ef4aa7d9b77c5f853968da6e4e9dbc310c9abec..96fee471cc7e5351a59e7d51f9b3772862bcc195 100644 (file)
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -9,6 +9,7 @@ namespace Msp {
 namespace GL {
 
 class Program;
+class Resources;
 
 class ProgramCompiler
 {
@@ -48,6 +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 &);
@@ -58,6 +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;
@@ -81,14 +108,32 @@ private:
                virtual void visit(ProgramSyntax::InterfaceBlock &);
        };
 
-       struct InterfaceGenerator: Visitor
+       struct FunctionResolver: Visitor
+       {
+               std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
+
+               virtual void visit(ProgramSyntax::FunctionCall &);
+               virtual void visit(ProgramSyntax::FunctionDeclaration &);
+       };
+
+       struct BlockModifier: Visitor
+       {
+               bool remove_node;
+               std::list<ProgramSyntax::Node *> insert_nodes;
+
+               BlockModifier();
+
+               void flatten_block(ProgramSyntax::Block &);
+               void apply_and_increment(ProgramSyntax::Block &, std::list<ProgramSyntax::NodePtr<ProgramSyntax::Node> >::iterator &);
+               virtual void visit(ProgramSyntax::Block &);
+       };
+
+       struct InterfaceGenerator: BlockModifier
        {
                std::string in_prefix;
                std::string out_prefix;
                unsigned scope_level;
                std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
-               bool remove_node;
-               std::list<ProgramSyntax::Node *> insert_nodes;
 
                InterfaceGenerator();
 
@@ -109,6 +154,37 @@ 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: BlockModifier
+       {
+               unsigned scope_level;
+               ExpressionEvaluator::ValueMap variable_values;
+
+               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
@@ -147,6 +223,18 @@ 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;
@@ -158,6 +246,7 @@ private:
                virtual void visit(ProgramSyntax::VariableDeclaration &);
        };
 
+       Resources *resources;
        ProgramParser parser;
        ProgramSyntax::Module *module;
 
@@ -165,7 +254,7 @@ public:
        ProgramCompiler();
 
        void compile(const std::string &);
-       void compile(IO::Base &);
+       void compile(IO::Base &, Resources * = 0);
        void add_shaders(Program &);
 
 private:
@@ -173,6 +262,7 @@ 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 &);