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 ExpressionEvaluator: ProgramSyntax::NodeVisitor
 140         {
 141                 typedef std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Expression *> ValueMap;
 142
 143                 const ValueMap *variable_values;
 144                 float result;
 145                 bool result_valid;
 146
 147                 ExpressionEvaluator();
 148                 ExpressionEvaluator(const ValueMap &);
 149
 150                 virtual void visit(ProgramSyntax::Literal &);
 151                 virtual void visit(ProgramSyntax::VariableReference &);
 152                 virtual void visit(ProgramSyntax::UnaryExpression &);
 153                 virtual void visit(ProgramSyntax::BinaryExpression &);
 154         };
 155
 156         struct ConstantConditionEliminator: Visitor
 157         {
 158                 unsigned scope_level;
 159                 ExpressionEvaluator::ValueMap variable_values;
 160                 bool remove_node;
 161                 ProgramSyntax::Block *replacement_block;
 162
 163                 ConstantConditionEliminator();
 164
 165                 virtual void visit(ProgramSyntax::Block &);
 166                 virtual void visit(ProgramSyntax::Assignment &);
 167                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 168                 virtual void visit(ProgramSyntax::Conditional &);
 169                 virtual void visit(ProgramSyntax::Iteration &);
 170         };
 171
 172         struct UnusedVariableLocator: Visitor
 173         {
 174                 struct AssignmentList
 175                 {
 176                         std::vector<ProgramSyntax::Node *> nodes;
 177                         bool conditional;
 178                         bool self_referencing;
 179                 };
 180
 181                 typedef std::set<ProgramSyntax::Node *> ResultType;
 182                 typedef std::map<ProgramSyntax::VariableDeclaration *, AssignmentList> BlockAssignmentMap;
 183
 184                 std::set<ProgramSyntax::Node *> unused_nodes;
 185                 std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Node *> aggregates;
 186                 ProgramSyntax::Node *aggregate;
 187                 std::vector<BlockAssignmentMap> assignments;
 188                 ProgramSyntax::Assignment *assignment;
 189                 bool assignment_target;
 190
 191                 UnusedVariableLocator();
 192
 193                 virtual void apply(ProgramSyntax::Stage &);
 194                 const ResultType &get_result() const { return unused_nodes; }
 195                 virtual void visit(ProgramSyntax::VariableReference &);
 196                 virtual void visit(ProgramSyntax::MemberAccess &);
 197                 virtual void visit(ProgramSyntax::BinaryExpression &);
 198                 virtual void visit(ProgramSyntax::Assignment &);
 199                 void record_assignment(ProgramSyntax::VariableDeclaration &, ProgramSyntax::Node &, bool);
 200                 virtual void visit(ProgramSyntax::ExpressionStatement &);
 201                 virtual void visit(ProgramSyntax::StructDeclaration &);
 202                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 203                 virtual void visit(ProgramSyntax::InterfaceBlock &);
 204                 virtual void visit(ProgramSyntax::FunctionDeclaration &);
 205                 void merge_down_assignments();
 206                 virtual void visit(ProgramSyntax::Conditional &);
 207                 virtual void visit(ProgramSyntax::Iteration &);
 208         };
 209
 210         struct NodeRemover: Visitor
 211         {
 212                 std::set<ProgramSyntax::Node *> to_remove;
 213
 214                 NodeRemover() { }
 215                 NodeRemover(const std::set<ProgramSyntax::Node *> &);
 216
 217                 virtual void visit(ProgramSyntax::Block &);
 218                 virtual void visit(ProgramSyntax::VariableDeclaration &);
 219         };
 220
 221         Resources *resources;
 222         ProgramParser parser;
 223         ProgramSyntax::Module *module;
 224
 225 public:
 226         ProgramCompiler();
 227
 228         void compile(const std::string &);
 229         void compile(IO::Base &, Resources * = 0);
 230         void add_shaders(Program &);
 231
 232 private:
 233         static ProgramSyntax::Module *create_builtins_module();
 234         static ProgramSyntax::Module &get_builtins_module();
 235         static ProgramSyntax::Stage *get_builtins(ProgramSyntax::StageType);
 236         void process();
 237         void import(const std::string &);
 238         void generate(ProgramSyntax::Stage &);
 239         bool optimize(ProgramSyntax::Stage &);
 240         static void inject_block(ProgramSyntax::Block &, const ProgramSyntax::Block &);
 241         template<typename T>
 242         static typename T::ResultType apply(ProgramSyntax::Stage &);
 243         template<typename T, typename A>
 244         static typename T::ResultType apply(ProgramSyntax::Stage &, const A &);
 245 };
 246
 247 } // namespace GL
 248 } // namespace Msp
 249
 250 #endif