source/programcompiler.h

   1 #ifndef MSP_GL_PROGRAMCOMPILER_H_
   2 #define MSP_GL_PROGRAMCOMPILER_H_
   3
   4 #include <set>
   5 #include "programparser.h"
   6 #include "programsyntax.h"
   7
   8 namespace Msp {
   9 namespace GL {
  10
  11 class Program;
  12 class Resources;
  13
  14 class ProgramCompiler
  15 {
  16 private:
  17         struct Visitor: ProgramSyntax::TraversingVisitor
  18         {
  19                 typedef void ResultType;
  20
  21                 ProgramSyntax::Stage *stage;
  22
  23                 Visitor();
  24
  25                 virtual void apply(ProgramSyntax::Stage &);
  26                 void get_result() const { }
  27         };
  28
  29         struct Formatter: Visitor
  30         {
  31                 typedef std::string ResultType;
  32
  33                 std::string formatted;
  34                 unsigned indent;
  35                 bool parameter_list;
  36                 unsigned else_if;
  37                 std::string block_interface;
  38
  39                 Formatter();
  40
  41                 const std::string &get_result() const { return formatted; }
  42                 virtual void visit(ProgramSyntax::Block &);
  43                 virtual void visit(ProgramSyntax::Literal &);
  44                 virtual void visit(ProgramSyntax::ParenthesizedExpression &);
  45                 virtual void visit(ProgramSyntax::VariableReference &);
  46                 virtual void visit(ProgramSyntax::MemberAccess &);
  47                 virtual void visit(ProgramSyntax::UnaryExpression &);
  48                 virtual void visit(ProgramSyntax::BinaryExpression &);
  49                 virtual void visit(ProgramSyntax::Assignment &);
  50                 virtual void visit(ProgramSyntax::FunctionCall &);
  51                 virtual void visit(ProgramSyntax::ExpressionStatement &);
  52                 virtual void visit(ProgramSyntax::Import &);
  53                 virtual void visit(ProgramSyntax::Layout &);
  54                 virtual void visit(ProgramSyntax::StructDeclaration &);
  55                 virtual void visit(ProgramSyntax::VariableDeclaration &);
  56                 virtual void visit(ProgramSyntax::InterfaceBlock &);
  57                 virtual void visit(ProgramSyntax::FunctionDeclaration &);
  58                 virtual void visit(ProgramSyntax::Conditional &);
  59                 virtual void visit(ProgramSyntax::Iteration &);
  60                 virtual void visit(ProgramSyntax::Return &);
  61         };
  62
  63         template<typename T>
  64         struct NodeGatherer: Visitor
  65         {
  66                 typedef std::list<T *> ResultType;
  67
  68                 std::list<T *> nodes;
  69
  70                 const ResultType &get_result() const { return nodes; }
  71                 virtual void visit(T &n) { nodes.push_back(&n); }
  72         };
  73
  74         struct DeclarationCombiner: Visitor
  75         {
  76                 bool toplevel;
  77                 std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
  78                 std::map<std::string, ProgramSyntax::VariableDeclaration *> variables;
  79                 bool remove_node;
  80
  81                 DeclarationCombiner();
  82
  83                 virtual void visit(ProgramSyntax::Block &);
  84                 virtual void visit(ProgramSyntax::FunctionDeclaration &);
  85                 virtual void visit(ProgramSyntax::VariableDeclaration &);
  86         };
  87
  88         struct VariableResolver: Visitor
  89         {
  90                 std::vector<ProgramSyntax::Block *> blocks;
  91                 ProgramSyntax::StructDeclaration *type;
  92                 bool anonymous;
  93                 std::string block_interface;
  94                 bool record_target;
  95                 ProgramSyntax::VariableDeclaration *assignment_target;
  96                 bool self_referencing;
  97
  98                 VariableResolver();
  99
 100                 virtual void apply(ProgramSyntax::Stage &);
 101                 virtual void visit(ProgramSyntax::Block &);
 102                 virtual void visit(ProgramSyntax::VariableReference &);
 103                 virtual void visit(ProgramSyntax::MemberAccess &);
 104                 virtual void visit(ProgramSyntax::BinaryExpression &);
 105                 virtual void visit(ProgramSyntax::Assignment &);
 106                 virtual void visit(ProgramSyntax::StructDeclaration &);
 107                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 108                 virtual void visit(ProgramSyntax::InterfaceBlock &);
 109         };
 110
 111         struct InterfaceGenerator: Visitor
 112         {
 113                 std::string in_prefix;
 114                 std::string out_prefix;
 115                 unsigned scope_level;
 116                 std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
 117                 bool remove_node;
 118                 std::list<ProgramSyntax::Node *> insert_nodes;
 119
 120                 InterfaceGenerator();
 121
 122                 static std::string get_out_prefix(ProgramSyntax::StageType);
 123                 virtual void apply(ProgramSyntax::Stage &);
 124                 virtual void visit(ProgramSyntax::Block &);
 125                 std::string change_prefix(const std::string &, const std::string &) const;
 126                 bool generate_interface(ProgramSyntax::VariableDeclaration &, const std::string &, const std::string &);
 127                 void insert_assignment(const std::string &, ProgramSyntax::Expression *);
 128                 virtual void visit(ProgramSyntax::VariableReference &);
 129                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 130                 virtual void visit(ProgramSyntax::Passthrough &);
 131         };
 132
 133         struct VariableRenamer: Visitor
 134         {
 135                 virtual void visit(ProgramSyntax::VariableReference &);
 136                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 137         };
 138
 139         struct UnusedVariableLocator: Visitor
 140         {
 141                 struct AssignmentList
 142                 {
 143                         std::vector<ProgramSyntax::Node *> nodes;
 144                         bool conditional;
 145                         bool self_referencing;
 146                 };
 147
 148                 typedef std::set<ProgramSyntax::Node *> ResultType;
 149                 typedef std::map<ProgramSyntax::VariableDeclaration *, AssignmentList> BlockAssignmentMap;
 150
 151                 std::set<ProgramSyntax::Node *> unused_nodes;
 152                 std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Node *> aggregates;
 153                 ProgramSyntax::Node *aggregate;
 154                 std::vector<BlockAssignmentMap> assignments;
 155                 ProgramSyntax::Assignment *assignment;
 156                 bool assignment_target;
 157
 158                 UnusedVariableLocator();
 159
 160                 virtual void apply(ProgramSyntax::Stage &);
 161                 const ResultType &get_result() const { return unused_nodes; }
 162                 virtual void visit(ProgramSyntax::VariableReference &);
 163                 virtual void visit(ProgramSyntax::MemberAccess &);
 164                 virtual void visit(ProgramSyntax::BinaryExpression &);
 165                 virtual void visit(ProgramSyntax::Assignment &);
 166                 void record_assignment(ProgramSyntax::VariableDeclaration &, ProgramSyntax::Node &, bool);
 167                 virtual void visit(ProgramSyntax::ExpressionStatement &);
 168                 virtual void visit(ProgramSyntax::StructDeclaration &);
 169                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 170                 virtual void visit(ProgramSyntax::InterfaceBlock &);
 171                 virtual void visit(ProgramSyntax::FunctionDeclaration &);
 172                 void merge_down_assignments();
 173                 virtual void visit(ProgramSyntax::Conditional &);
 174                 virtual void visit(ProgramSyntax::Iteration &);
 175         };
 176
 177         struct NodeRemover: Visitor
 178         {
 179                 std::set<ProgramSyntax::Node *> to_remove;
 180
 181                 NodeRemover() { }
 182                 NodeRemover(const std::set<ProgramSyntax::Node *> &);
 183
 184                 virtual void visit(ProgramSyntax::Block &);
 185                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 186         };
 187
 188         Resources *resources;
 189         ProgramParser parser;
 190         ProgramSyntax::Module *module;
 191
 192 public:
 193         ProgramCompiler();
 194
 195         void compile(const std::string &);
 196         void compile(IO::Base &, Resources * = 0);
 197         void add_shaders(Program &);
 198
 199 private:
 200         static ProgramSyntax::Module *create_builtins_module();
 201         static ProgramSyntax::Module &get_builtins_module();
 202         static ProgramSyntax::Stage *get_builtins(ProgramSyntax::StageType);
 203         void process();
 204         void import(const std::string &);
 205         void generate(ProgramSyntax::Stage &);
 206         bool optimize(ProgramSyntax::Stage &);
 207         static void inject_block(ProgramSyntax::Block &, const ProgramSyntax::Block &);
 208         template<typename T>
 209         static typename T::ResultType apply(ProgramSyntax::Stage &);
 210         template<typename T, typename A>
 211         static typename T::ResultType apply(ProgramSyntax::Stage &, const A &);
 212 };
 213
 214 } // namespace GL
 215 } // namespace Msp
 216
 217 #endif