source/glsl/builtin.cpp

   1 #include <msp/gl/resources.h>
   2 #include <msp/io/seekable.h>
   3 #include "builtin.h"
   4 #include "generate.h"
   5 #include "parser.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace GL {
  11 namespace SL {
  12
  13 Module *get_builtins_module()
  14 {
  15         static RefPtr<Module> builtins_module;
  16         static bool initialized = false;
  17         if(!initialized)
  18         {
  19                 initialized = true;
  20
  21                 RefPtr<IO::Seekable> io = Resources::get_builtins().open("_builtin.glsl");
  22                 if(!io)
  23                         return 0;
  24
  25                 Parser parser;
  26                 Module *module = new Module(parser.parse(*io, "<builtin>", BUILTIN_SOURCE));
  27
  28                 NodeList<Statement> &shared_body = module->shared.content.body;
  29                 NodeList<Statement>::iterator insert_point = shared_body.begin();
  30
  31                 RefPtr<BasicTypeDeclaration> type = new BasicTypeDeclaration;
  32                 type->source = BUILTIN_SOURCE;
  33                 type->name = "void";
  34                 type->kind = BasicTypeDeclaration::VOID;
  35                 shared_body.insert(insert_point, type);
  36
  37                 type = new BasicTypeDeclaration;
  38                 type->source = BUILTIN_SOURCE;
  39                 type->name = "bool";
  40                 type->size = 1;
  41                 type->kind = BasicTypeDeclaration::BOOL;
  42                 shared_body.insert(insert_point, type);
  43
  44                 type = new BasicTypeDeclaration;
  45                 type->source = BUILTIN_SOURCE;
  46                 type->name = "int";
  47                 type->size = 32;
  48                 type->kind = BasicTypeDeclaration::INT;
  49                 shared_body.insert(insert_point, type);
  50
  51                 type = new BasicTypeDeclaration;
  52                 type->source = BUILTIN_SOURCE;
  53                 type->name = "float";
  54                 type->size = 32;
  55                 type->kind = BasicTypeDeclaration::FLOAT;
  56                 shared_body.insert(insert_point, type);
  57
  58                 TypeResolver().apply(module->shared);
  59                 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  60                         TypeResolver().apply(*i);
  61
  62                 builtins_module = module;
  63         }
  64         return builtins_module.get();
  65 }
  66
  67 const Stage *get_builtins(Stage::Type type)
  68 {
  69         Module *module = get_builtins_module();
  70         if(!module)
  71                 return 0;
  72
  73         if(type==Stage::SHARED)
  74                 return &module->shared;
  75         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  76                 if(i->type==type)
  77                         return &*i;
  78         return 0;
  79 }
  80
  81 } // namespace SL
  82 } // namespace GL
  83 } // namespace Msp