+void ProgramCompiler::import(const string &name)
+{
+ if(!resources)
+ throw runtime_error("no resources");
+ RefPtr<IO::Seekable> io = resources->open_raw(name+".glsl");
+ if(!io)
+ throw runtime_error(format("module %s not found", name));
+ ProgramParser import_parser;
+ Module &imported_module = import_parser.parse(*io);
+
+ inject_block(module->shared.content, imported_module.shared.content);
+ apply<DeclarationCombiner>(module->shared);
+ for(list<Stage>::iterator i=imported_module.stages.begin(); i!=imported_module.stages.end(); ++i)
+ {
+ list<Stage>::iterator j;
+ for(j=module->stages.begin(); (j!=module->stages.end() && j->type<i->type); ++j) ;
+ if(j==module->stages.end() || j->type>i->type)
+ {
+ j = module->stages.insert(j, *i);
+ list<Stage>::iterator k = j;
+ if(++k!=module->stages.end())
+ k->previous = &*j;
+ if(j!=module->stages.begin())
+ j->previous = &*--(k=j);
+ }
+ else
+ {
+ inject_block(j->content, i->content);
+ apply<DeclarationCombiner>(*j);
+ }
+ }
+}
+