1 #include <msp/core/algorithm.h>
2 #include <msp/core/raii.h>
3 #include <msp/gl/extensions/arb_explicit_attrib_location.h>
4 #include <msp/gl/extensions/arb_gpu_shader5.h>
5 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
6 #include <msp/gl/extensions/ext_gpu_shader4.h>
7 #include <msp/gl/extensions/ext_texture_array.h>
8 #include <msp/strings/format.h>
9 #include <msp/strings/regex.h>
10 #include <msp/strings/utils.h>
21 const char builtins_src[] =
22 "#pragma MSP stage(vertex)\n"
23 "out gl_PerVertex {\n"
24 " vec4 gl_Position;\n"
25 " float gl_ClipDistance[];\n"
27 "#pragma MSP stage(geometry)\n"
29 " vec4 gl_Position;\n"
30 " float gl_ClipDistance[];\n"
32 "out gl_PerVertex {\n"
33 " vec4 gl_Position;\n"
34 " float gl_ClipDistance[];\n"
53 void Compiler::compile(const string &source, const string &src_name)
57 module = new Module();
59 imported_names.push_back(src_name);
60 append_module(parser.parse(source, src_name, 1));
64 void Compiler::compile(IO::Base &io, Resources *res, const string &src_name)
68 module = new Module();
70 imported_names.push_back(src_name);
71 append_module(parser.parse(io, src_name, 1));
75 void Compiler::compile(IO::Base &io, const string &src_name)
77 compile(io, 0, src_name);
80 void Compiler::add_shaders(Program &program)
83 throw invalid_operation("Compiler::add_shaders");
87 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
91 program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
92 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
93 program.bind_attribute(j->second, j->first);
95 else if(i->type==GEOMETRY)
96 program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
97 else if(i->type==FRAGMENT)
99 program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
102 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
103 program.bind_fragment_data(j->second, j->first);
108 catch(const compile_error &e)
110 static const Regex r_message("^(([0-9]+)\\(([0-9]+)\\) :|ERROR: ([0-9]+):([0-9]+):) (.*)$");
111 vector<string> lines = split(e.what(), '\n');
113 for(vector<string>::const_iterator i=lines.begin(); i!=lines.end(); ++i)
115 RegMatch m = r_message.match(*i);
122 index = lexical_cast<unsigned>(m[2].str);
123 line = lexical_cast<unsigned>(m[3].str);
127 index = lexical_cast<unsigned>(m[4].str);
128 line = lexical_cast<unsigned>(m[5].str);
130 const char *src = "<unknown>";
133 else if(index-1<imported_names.size())
134 src = imported_names[index-1].c_str();
135 translated += format("%s:%d: %s", src, line, m[6].str);
142 throw compile_error(translated);
146 Module *Compiler::create_builtins_module()
149 Module *module = new Module(parser.parse(builtins_src, "<builtin>"));
150 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
152 VariableResolver resolver;
153 i->content.visit(resolver);
154 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
155 j->second->linked_declaration = j->second;
160 Module &Compiler::get_builtins_module()
162 static RefPtr<Module> builtins_module = create_builtins_module();
163 return *builtins_module;
166 Stage *Compiler::get_builtins(StageType type)
168 Module &module = get_builtins_module();
169 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
175 void Compiler::append_module(Module &mod)
177 vector<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
178 for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
179 import((*i)->module);
180 apply<NodeRemover>(mod.shared, set<Node *>(imports.begin(), imports.end()));
182 append_stage(mod.shared);
183 for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
187 void Compiler::append_stage(Stage &stage)
190 if(stage.type==SHARED)
191 target = &module->shared;
194 list<Stage>::iterator i;
195 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
196 if(i==module->stages.end() || i->type>stage.type)
198 list<Stage>::iterator j = module->stages.insert(i, stage.type);
199 if(i!=module->stages.end())
202 if(i!=module->stages.begin())
209 if(stage.required_version>target->required_version)
210 target->required_version = stage.required_version;
211 for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
212 target->content.body.push_back(*i);
213 apply<DeclarationCombiner>(*target);
216 void Compiler::process()
218 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
220 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
223 i = module->stages.begin();
227 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
231 void Compiler::import(const string &name)
233 string fn = name+".glsl";
234 if(find(imported_names, fn)!=imported_names.end())
236 imported_names.push_back(fn);
238 RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
240 throw runtime_error(format("module %s not found", name));
241 Parser import_parser;
242 append_module(import_parser.parse(*io, fn, imported_names.size()));
245 void Compiler::generate(Stage &stage)
247 if(module->shared.required_version>stage.required_version)
248 stage.required_version = module->shared.required_version;
249 inject_block(stage.content, module->shared.content);
251 apply<DeclarationReorderer>(stage);
252 apply<FunctionResolver>(stage);
253 apply<VariableResolver>(stage);
254 apply<InterfaceGenerator>(stage);
255 apply<VariableResolver>(stage);
256 apply<DeclarationReorderer>(stage);
257 apply<FunctionResolver>(stage);
258 apply<LegacyConverter>(stage);
261 bool Compiler::optimize(Stage &stage)
263 apply<ConstantConditionEliminator>(stage);
265 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
266 apply<FunctionInliner>(stage, inlineable);
268 set<Node *> unused = apply<UnusedVariableLocator>(stage);
269 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
270 unused.insert(unused2.begin(), unused2.end());
271 apply<NodeRemover>(stage, unused);
273 return !unused.empty();
276 void Compiler::finalize(Stage &stage)
278 if(get_gl_api()==OPENGL_ES2)
279 apply<DefaultPrecisionGenerator>(stage);
281 apply<PrecisionRemover>(stage);
284 void Compiler::inject_block(Block &target, const Block &source)
286 NodeList<Statement>::iterator insert_point = target.body.begin();
287 for(NodeList<Statement>::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
288 target.body.insert(insert_point, (*i)->clone());
292 typename T::ResultType Compiler::apply(Stage &stage)
295 visitor.apply(stage);
296 return visitor.get_result();
299 template<typename T, typename A>
300 typename T::ResultType Compiler::apply(Stage &stage, const A &arg)
303 visitor.apply(stage);
304 return visitor.get_result();
308 Compiler::Visitor::Visitor():
312 void Compiler::Visitor::apply(Stage &s)
314 SetForScope<Stage *> set(stage, &s);
315 stage->content.visit(*this);
319 Compiler::BlockModifier::BlockModifier():
323 void Compiler::BlockModifier::flatten_block(Block &block)
325 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
329 void Compiler::BlockModifier::apply_and_increment(Block &block, NodeList<Statement>::iterator &i)
331 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
332 insert_nodes.clear();
335 block.body.erase(i++);
341 void Compiler::BlockModifier::visit(Block &block)
343 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
346 apply_and_increment(block, i);
351 Compiler::Formatter::Formatter():
355 parameter_list(false)
358 void Compiler::Formatter::apply(Stage &s)
360 GLApi api = get_gl_api();
361 const Version &ver = s.required_version;
365 append(format("#version %d%02d", ver.major, ver.minor));
366 if(api==OPENGL_ES2 && ver>=Version(3, 0))
371 for(vector<const Extension *>::const_iterator i=s.required_extensions.begin(); i!=s.required_extensions.end(); ++i)
372 append(format("#extension %s: require\n", (*i)->get_name()));
373 if(!s.required_extensions.empty())
379 void Compiler::Formatter::append(const string &text)
382 for(string::const_iterator i=text.begin(); i!=text.end(); ++i)
387 void Compiler::Formatter::append(char c)
394 void Compiler::Formatter::set_source(unsigned index, unsigned line)
396 if(index!=source_index || (index && line!=source_line))
398 if(index==source_index && line==source_line+1)
403 if(stage->required_version<Version(3, 30))
405 formatted += format("#line %d %d\n", l, index);
408 source_index = index;
412 void Compiler::Formatter::visit(Literal &literal)
414 append(literal.token);
417 void Compiler::Formatter::visit(ParenthesizedExpression &parexpr)
420 parexpr.expression->visit(*this);
424 void Compiler::Formatter::visit(VariableReference &var)
429 void Compiler::Formatter::visit(MemberAccess &memacc)
431 memacc.left->visit(*this);
432 append(format(".%s", memacc.member));
435 void Compiler::Formatter::visit(UnaryExpression &unary)
439 unary.expression->visit(*this);
444 void Compiler::Formatter::visit(BinaryExpression &binary)
446 binary.left->visit(*this);
448 binary.right->visit(*this);
449 append(binary.after);
452 void Compiler::Formatter::visit(Assignment &assign)
454 assign.left->visit(*this);
455 append(format(" %s ", assign.oper));
456 assign.right->visit(*this);
459 void Compiler::Formatter::visit(FunctionCall &call)
461 append(format("%s(", call.name));
462 for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
464 if(i!=call.arguments.begin())
471 void Compiler::Formatter::visit(ExpressionStatement &expr)
473 expr.expression->visit(*this);
477 void Compiler::Formatter::visit(Block &block)
479 unsigned brace_indent = indent;
480 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
482 append(format("%s{\n", string(brace_indent*2, ' ')));
484 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
485 string spaces(indent*2, ' ');
486 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
488 if(i!=block.body.begin())
490 set_source((*i)->source, (*i)->line);
496 append(format("\n%s}", string(brace_indent*2, ' ')));
499 void Compiler::Formatter::visit(Import &import)
501 append(format("import %s;", import.module));
504 void Compiler::Formatter::visit(Precision &prec)
506 append(format("precision %s %s;", prec.precision, prec.type));
509 void Compiler::Formatter::visit(Layout &layout)
512 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
514 if(i!=layout.qualifiers.begin())
516 append(i->identifier);
517 if(!i->value.empty())
518 append(format("=%s", i->value));
523 void Compiler::Formatter::visit(InterfaceLayout &layout)
525 layout.layout.visit(*this);
526 append(format(" %s;", layout.interface));
529 void Compiler::Formatter::visit(StructDeclaration &strct)
531 append(format("struct %s\n", strct.name));
532 strct.members.visit(*this);
536 void Compiler::Formatter::visit(VariableDeclaration &var)
540 var.layout->visit(*this);
545 if(!var.interpolation.empty())
546 append(format("%s ", var.interpolation));
547 if(!var.sampling.empty())
548 append(format("%s ", var.sampling));
549 if(!var.interface.empty() && var.interface!=block_interface)
551 string interface = var.interface;
552 if(stage->required_version<Version(1, 30))
554 if(stage->type==VERTEX && var.interface=="in")
555 interface = "attribute";
556 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
557 interface = "varying";
559 append(format("%s ", interface));
561 if(!var.precision.empty())
562 append(format("%s ", var.precision));
563 append(format("%s %s", var.type, var.name));
568 var.array_size->visit(*this);
571 if(var.init_expression)
574 var.init_expression->visit(*this);
580 void Compiler::Formatter::visit(InterfaceBlock &iface)
582 SetForScope<string> set(block_interface, iface.interface);
583 append(format("%s %s\n", iface.interface, iface.name));
584 iface.members.visit(*this);
588 void Compiler::Formatter::visit(FunctionDeclaration &func)
590 append(format("%s %s(", func.return_type, func.name));
591 for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
593 if(i!=func.parameters.begin())
595 SetFlag set(parameter_list);
599 if(func.definition==&func)
602 func.body.visit(*this);
608 void Compiler::Formatter::visit(Conditional &cond)
611 cond.condition->visit(*this);
614 cond.body.visit(*this);
615 if(!cond.else_body.body.empty())
617 Conditional *else_cond = dynamic_cast<Conditional *>(cond.else_body.body.front().get());
618 if(cond.else_body.body.size()==1 && else_cond)
621 set_source(else_cond->source, else_cond->line);
622 append(format("%selse ", string(indent*2, ' ')));
623 else_cond->visit(*this);
627 append(format("\n%selse\n", string(indent*2, ' ')));
628 cond.else_body.visit(*this);
633 void Compiler::Formatter::visit(Iteration &iter)
635 if(!iter.init_statement && iter.condition && !iter.loop_expression)
638 iter.condition->visit(*this);
644 if(iter.init_statement)
645 iter.init_statement->visit(*this);
651 iter.condition->visit(*this);
654 if(iter.loop_expression)
657 iter.loop_expression->visit(*this);
662 if(iter.body.body.empty())
667 iter.body.visit(*this);
671 void Compiler::Formatter::visit(Return &ret)
677 ret.expression->visit(*this);
682 void Compiler::Formatter::visit(Jump &jump)
684 append(jump.keyword);
689 Compiler::DeclarationCombiner::DeclarationCombiner():
693 void Compiler::DeclarationCombiner::visit(Block &block)
698 SetForScope<bool> set(toplevel, false);
699 BlockModifier::visit(block);
702 void Compiler::DeclarationCombiner::visit(FunctionDeclaration &func)
704 vector<FunctionDeclaration *> &decls = functions[func.name];
707 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
709 (*i)->definition = func.definition;
710 (*i)->body.body.clear();
713 decls.push_back(&func);
716 void Compiler::DeclarationCombiner::visit(VariableDeclaration &var)
718 VariableDeclaration *&ptr = variables[var.name];
721 ptr->type = var.type;
722 if(var.init_expression)
723 ptr->init_expression = var.init_expression;
728 for(vector<Layout::Qualifier>::iterator i=var.layout->qualifiers.begin(); i!=var.layout->qualifiers.end(); ++i)
731 for(vector<Layout::Qualifier>::iterator j=ptr->layout->qualifiers.begin(); (!found && j!=ptr->layout->qualifiers.end()); ++j)
732 if(j->identifier==i->identifier)
739 ptr->layout->qualifiers.push_back(*i);
743 ptr->layout = var.layout;
752 Compiler::VariableResolver::VariableResolver():
754 record_target(false),
755 assignment_target(0),
756 self_referencing(false)
759 void Compiler::VariableResolver::apply(Stage &s)
761 SetForScope<Stage *> set(stage, &s);
762 Stage *builtins = get_builtins(stage->type);
764 blocks.push_back(&builtins->content);
765 stage->content.visit(*this);
770 void Compiler::VariableResolver::visit(Block &block)
772 blocks.push_back(&block);
773 block.variables.clear();
774 TraversingVisitor::visit(block);
778 void Compiler::VariableResolver::visit(VariableReference &var)
782 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
785 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
786 if(j!=(*i)->variables.end())
788 var.declaration = j->second;
789 type = j->second->type_declaration;
796 if(assignment_target)
798 record_target = false;
799 assignment_target = 0;
802 assignment_target = var.declaration;
804 else if(var.declaration && var.declaration==assignment_target)
805 self_referencing = true;
808 void Compiler::VariableResolver::visit(MemberAccess &memacc)
811 TraversingVisitor::visit(memacc);
812 memacc.declaration = 0;
815 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
816 if(i!=type->members.variables.end())
818 memacc.declaration = i->second;
819 type = i->second->type_declaration;
826 void Compiler::VariableResolver::visit(BinaryExpression &binary)
831 SetForScope<bool> set(record_target, false);
832 binary.right->visit(*this);
835 binary.left->visit(*this);
839 TraversingVisitor::visit(binary);
844 void Compiler::VariableResolver::visit(Assignment &assign)
847 SetFlag set(record_target);
848 assignment_target = 0;
849 assign.left->visit(*this);
852 self_referencing = false;
853 assign.right->visit(*this);
855 assign.self_referencing = (self_referencing || assign.oper!="=");
856 assign.target_declaration = assignment_target;
859 void Compiler::VariableResolver::visit(StructDeclaration &strct)
861 TraversingVisitor::visit(strct);
862 blocks.back()->types[strct.name] = &strct;
865 void Compiler::VariableResolver::visit(VariableDeclaration &var)
867 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
870 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
871 if(j!=(*i)->types.end())
872 var.type_declaration = j->second;
875 if(!block_interface.empty() && var.interface.empty())
876 var.interface = block_interface;
878 TraversingVisitor::visit(var);
879 blocks.back()->variables[var.name] = &var;
880 if(anonymous && blocks.size()>1)
881 blocks[blocks.size()-2]->variables[var.name] = &var;
884 void Compiler::VariableResolver::visit(InterfaceBlock &iface)
886 SetFlag set(anonymous);
887 SetForScope<string> set2(block_interface, iface.interface);
888 TraversingVisitor::visit(iface);
892 void Compiler::FunctionResolver::visit(FunctionCall &call)
894 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
895 if(i!=functions.end())
896 call.declaration = i->second.back();
898 TraversingVisitor::visit(call);
901 void Compiler::FunctionResolver::visit(FunctionDeclaration &func)
903 vector<FunctionDeclaration *> &decls = functions[func.name];
906 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
907 (*i)->definition = func.definition;
909 decls.push_back(&func);
911 else if(!decls.empty() && decls.back()->definition)
912 func.definition = decls.back()->definition;
914 decls.push_back(&func);
916 TraversingVisitor::visit(func);
920 Compiler::InterfaceGenerator::InterfaceGenerator():
924 string Compiler::InterfaceGenerator::get_out_prefix(StageType type)
928 else if(type==GEOMETRY)
934 void Compiler::InterfaceGenerator::apply(Stage &s)
936 SetForScope<Stage *> set(stage, &s);
938 in_prefix = get_out_prefix(stage->previous->type);
939 out_prefix = get_out_prefix(stage->type);
940 stage->content.visit(*this);
943 void Compiler::InterfaceGenerator::visit(Block &block)
945 SetForScope<unsigned> set(scope_level, scope_level+1);
946 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
952 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
954 NodeList<Statement>::iterator k = block.body.insert(i, j->second);
957 iface_declarations.clear();
960 apply_and_increment(block, i);
964 string Compiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
966 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
967 return prefix+name.substr(offset);
970 bool Compiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
972 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
973 if(stage_vars.count(name) || iface_declarations.count(name))
976 VariableDeclaration* iface_var = new VariableDeclaration;
977 iface_var->sampling = var.sampling;
978 iface_var->interface = iface;
979 iface_var->type = var.type;
980 iface_var->type_declaration = var.type_declaration;
981 iface_var->name = name;
982 if(stage->type==GEOMETRY)
983 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
985 iface_var->array = var.array;
987 iface_var->array_size = var.array_size;
989 iface_var->linked_declaration = &var;
990 iface_declarations[name] = iface_var;
995 ExpressionStatement &Compiler::InterfaceGenerator::insert_assignment(const string &left, Expression *right)
997 Assignment *assign = new Assignment;
998 VariableReference *ref = new VariableReference;
1002 assign->right = right;
1004 ExpressionStatement *stmt = new ExpressionStatement;
1005 stmt->expression = assign;
1007 insert_nodes.push_back(stmt);
1012 void Compiler::InterfaceGenerator::visit(VariableReference &var)
1014 if(var.declaration || !stage->previous)
1016 if(iface_declarations.count(var.name))
1019 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
1020 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
1021 if(i==prev_out.end())
1022 i = prev_out.find(in_prefix+var.name);
1023 if(i!=prev_out.end())
1025 generate_interface(*i->second, "in", i->second->name);
1026 var.name = i->second->name;
1030 void Compiler::InterfaceGenerator::visit(VariableDeclaration &var)
1032 if(var.interface=="out")
1035 stage->out_variables[var.name] = &var;
1036 else if(generate_interface(var, "out", change_prefix(var.name, string())))
1039 if(var.init_expression)
1041 ExpressionStatement &stmt = insert_assignment(var.name, var.init_expression->clone());
1042 stmt.source = var.source;
1043 stmt.line = var.line;
1048 else if(var.interface=="in")
1050 stage->in_variables[var.name] = &var;
1051 if(var.linked_declaration)
1052 var.linked_declaration->linked_declaration = &var;
1053 else if(stage->previous)
1055 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
1056 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
1057 if(i!=prev_out.end())
1059 var.linked_declaration = i->second;
1060 i->second->linked_declaration = &var;
1065 TraversingVisitor::visit(var);
1068 void Compiler::InterfaceGenerator::visit(Passthrough &pass)
1070 vector<VariableDeclaration *> pass_vars;
1072 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
1073 pass_vars.push_back(i->second);
1074 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
1075 if(i->second->interface=="in")
1076 pass_vars.push_back(i->second.get());
1080 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
1081 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
1083 bool linked = false;
1084 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
1085 linked = ((*j)->linked_declaration==i->second);
1087 if(!linked && generate_interface(*i->second, "in", i->second->name))
1088 pass_vars.push_back(i->second);
1092 if(stage->type==GEOMETRY)
1094 VariableReference *ref = new VariableReference;
1095 ref->name = "gl_in";
1097 BinaryExpression *subscript = new BinaryExpression;
1098 subscript->left = ref;
1099 subscript->oper = "[";
1100 subscript->right = pass.subscript;
1101 subscript->after = "]";
1103 MemberAccess *memacc = new MemberAccess;
1104 memacc->left = subscript;
1105 memacc->member = "gl_Position";
1107 insert_assignment("gl_Position", memacc);
1110 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
1112 string out_name = change_prefix((*i)->name, out_prefix);
1113 generate_interface(**i, "out", out_name);
1115 VariableReference *ref = new VariableReference;
1116 ref->name = (*i)->name;
1119 BinaryExpression *subscript = new BinaryExpression;
1120 subscript->left = ref;
1121 subscript->oper = "[";
1122 subscript->right = pass.subscript;
1123 subscript->after = "]";
1124 insert_assignment(out_name, subscript);
1127 insert_assignment(out_name, ref);
1134 Compiler::DeclarationReorderer::DeclarationReorderer():
1136 kind(NO_DECLARATION)
1139 void Compiler::DeclarationReorderer::visit(FunctionCall &call)
1141 FunctionDeclaration *def = call.declaration;
1143 def = def->definition;
1144 if(def && !ordered_funcs.count(def))
1145 needed_funcs.insert(def);
1148 void Compiler::DeclarationReorderer::visit(Block &block)
1150 SetForScope<unsigned> set(scope_level, scope_level+1);
1152 return Visitor::visit(block);
1154 NodeList<Statement>::iterator struct_insert_point = block.body.end();
1155 NodeList<Statement>::iterator variable_insert_point = block.body.end();
1156 NodeList<Statement>::iterator function_insert_point = block.body.end();
1157 unsigned unordered_func_count = 0;
1158 bool ordered_any_funcs = false;
1160 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
1162 kind = NO_DECLARATION;
1166 if(kind==STRUCT && struct_insert_point!=block.body.end())
1168 block.body.insert(struct_insert_point, *i);
1171 else if(kind>STRUCT && struct_insert_point==block.body.end())
1172 struct_insert_point = i;
1174 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1176 block.body.insert(variable_insert_point, *i);
1179 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1180 variable_insert_point = i;
1184 if(function_insert_point==block.body.end())
1185 function_insert_point = i;
1187 if(needed_funcs.empty())
1189 ordered_funcs.insert(i->get());
1190 if(i!=function_insert_point)
1192 block.body.insert(function_insert_point, *i);
1196 ++function_insert_point;
1197 ordered_any_funcs = true;
1200 ++unordered_func_count;
1205 if(function_insert_point==i)
1206 ++function_insert_point;
1207 block.body.erase(i++);
1212 if(i==block.body.end() && unordered_func_count)
1214 if(!ordered_any_funcs)
1215 // A subset of the remaining functions forms a recursive loop
1216 /* TODO pick a function and move it up, adding any necessary
1220 i = function_insert_point;
1221 unordered_func_count = 0;
1226 void Compiler::DeclarationReorderer::visit(VariableDeclaration &var)
1228 Visitor::visit(var);
1232 void Compiler::DeclarationReorderer::visit(FunctionDeclaration &func)
1234 needed_funcs.clear();
1235 func.body.visit(*this);
1236 needed_funcs.erase(&func);
1241 Compiler::InlineableFunctionLocator::InlineableFunctionLocator():
1245 void Compiler::InlineableFunctionLocator::visit(FunctionCall &call)
1247 FunctionDeclaration *def = call.declaration;
1248 if(def && def->definition!=def)
1249 def = def->definition;
1253 unsigned &count = refcounts[def];
1255 if(count>1 || def==in_function)
1256 inlineable.erase(def);
1259 TraversingVisitor::visit(call);
1262 void Compiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1264 unsigned &count = refcounts[func.definition];
1265 if(!count && func.parameters.empty())
1266 inlineable.insert(func.definition);
1268 SetForScope<FunctionDeclaration *> set(in_function, &func);
1269 TraversingVisitor::visit(func);
1273 Compiler::FunctionInliner::FunctionInliner():
1277 Compiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1282 void Compiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1287 ptr = inline_result;
1290 void Compiler::FunctionInliner::visit(Block &block)
1295 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1303 void Compiler::FunctionInliner::visit(UnaryExpression &unary)
1305 visit_and_inline(unary.expression);
1309 void Compiler::FunctionInliner::visit(BinaryExpression &binary)
1311 visit_and_inline(binary.left);
1312 visit_and_inline(binary.right);
1316 void Compiler::FunctionInliner::visit(MemberAccess &memacc)
1318 visit_and_inline(memacc.left);
1322 void Compiler::FunctionInliner::visit(FunctionCall &call)
1324 for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1325 visit_and_inline(*i);
1327 FunctionDeclaration *def = call.declaration;
1328 if(def && def->definition!=def)
1329 def = def->definition;
1331 if(def && inlineable.count(def))
1340 void Compiler::FunctionInliner::visit(VariableDeclaration &var)
1342 if(var.init_expression)
1343 visit_and_inline(var.init_expression);
1347 void Compiler::FunctionInliner::visit(Return &ret)
1349 TraversingVisitor::visit(ret);
1352 inline_result = ret.expression->clone();
1356 Compiler::ExpressionEvaluator::ExpressionEvaluator():
1362 Compiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1363 variable_values(&v),
1368 void Compiler::ExpressionEvaluator::visit(Literal &literal)
1370 if(literal.token=="true")
1372 else if(literal.token=="false")
1375 result = lexical_cast<float>(literal.token);
1376 result_valid = true;
1379 void Compiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1381 parexp.expression->visit(*this);
1384 void Compiler::ExpressionEvaluator::visit(VariableReference &var)
1386 if(!var.declaration)
1391 ValueMap::const_iterator i = variable_values->find(var.declaration);
1392 if(i!=variable_values->end())
1393 i->second->visit(*this);
1395 else if(var.declaration->init_expression)
1396 var.declaration->init_expression->visit(*this);
1399 void Compiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1401 result_valid = false;
1402 unary.expression->visit(*this);
1409 result_valid = false;
1412 void Compiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1414 result_valid = false;
1415 binary.left->visit(*this);
1419 float left_result = result;
1420 result_valid = false;
1421 binary.right->visit(*this);
1425 if(binary.oper=="<")
1426 result = (left_result<result);
1427 else if(binary.oper=="<=")
1428 result = (left_result<=result);
1429 else if(binary.oper==">")
1430 result = (left_result>result);
1431 else if(binary.oper==">=")
1432 result = (left_result>=result);
1433 else if(binary.oper=="==")
1434 result = (left_result==result);
1435 else if(binary.oper=="!=")
1436 result = (left_result!=result);
1437 else if(binary.oper=="&&")
1438 result = (left_result && result);
1439 else if(binary.oper=="||")
1440 result = (left_result || result);
1442 result_valid = false;
1446 Compiler::ConstantConditionEliminator::ConstantConditionEliminator():
1451 void Compiler::ConstantConditionEliminator::visit(Block &block)
1453 SetForScope<unsigned> set(scope_level, scope_level+1);
1454 BlockModifier::visit(block);
1456 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1457 variable_values.erase(i->second);
1460 void Compiler::ConstantConditionEliminator::visit(UnaryExpression &unary)
1462 if(VariableReference *var = dynamic_cast<VariableReference *>(unary.expression.get()))
1463 if(unary.oper=="++" || unary.oper=="--")
1464 variable_values.erase(var->declaration);
1467 void Compiler::ConstantConditionEliminator::visit(Assignment &assign)
1469 variable_values.erase(assign.target_declaration);
1472 void Compiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1474 if(var.constant || scope_level>1)
1475 variable_values[&var] = var.init_expression.get();
1478 void Compiler::ConstantConditionEliminator::visit(Conditional &cond)
1482 ExpressionEvaluator eval(variable_values);
1483 cond.condition->visit(eval);
1484 if(eval.result_valid)
1486 flatten_block(eval.result ? cond.body : cond.else_body);
1491 TraversingVisitor::visit(cond);
1494 void Compiler::ConstantConditionEliminator::visit(Iteration &iter)
1500 /* If the loop condition is always false on the first iteration, the
1501 entire loop can be removed */
1502 if(iter.init_statement)
1503 iter.init_statement->visit(*this);
1504 ExpressionEvaluator eval(variable_values);
1505 iter.condition->visit(eval);
1506 if(eval.result_valid && !eval.result)
1513 /* Record all assignments that occur inside the loop body so those
1514 variables won't be considered as constant */
1515 SetFlag set_record(record_only);
1516 TraversingVisitor::visit(iter);
1519 TraversingVisitor::visit(iter);
1521 if(VariableDeclaration *init_decl = dynamic_cast<VariableDeclaration *>(iter.init_statement.get()))
1522 variable_values.erase(init_decl);
1526 Compiler::UnusedVariableLocator::UnusedVariableLocator():
1529 assignment_target(false),
1530 assign_to_subscript(false),
1534 void Compiler::UnusedVariableLocator::apply(Stage &s)
1536 variables.push_back(BlockVariableMap());
1538 BlockVariableMap &global_variables = variables.back();
1539 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1541 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1543 if(!i->second.referenced)
1545 unused_nodes.insert(i->first);
1546 clear_assignments(i->second, true);
1549 variables.pop_back();
1552 void Compiler::UnusedVariableLocator::visit(VariableReference &var)
1554 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1555 if(i!=aggregates.end())
1556 unused_nodes.erase(i->second);
1558 if(var.declaration && !assignment_target)
1560 VariableInfo &var_info = variables.back()[var.declaration];
1561 var_info.assignments.clear();
1562 var_info.referenced = true;
1566 void Compiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1568 TraversingVisitor::visit(memacc);
1569 unused_nodes.erase(memacc.declaration);
1572 void Compiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1574 if(binary.oper=="[")
1576 if(assignment_target)
1577 assign_to_subscript = true;
1578 binary.left->visit(*this);
1579 SetForScope<bool> set(assignment_target, false);
1580 binary.right->visit(*this);
1583 TraversingVisitor::visit(binary);
1586 void Compiler::UnusedVariableLocator::visit(Assignment &assign)
1589 assign_to_subscript = false;
1590 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1591 assign.left->visit(*this);
1593 assign.right->visit(*this);
1594 assignment = &assign;
1597 void Compiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool chained)
1599 VariableInfo &var_info = variables.back()[&var];
1601 clear_assignments(var_info, true);
1602 var_info.assignments.push_back(&node);
1603 var_info.conditionally_assigned = false;
1606 void Compiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1610 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1611 unused_nodes.insert(*i);
1613 var_info.assignments.clear();
1616 void Compiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1619 TraversingVisitor::visit(expr);
1620 if(assignment && assignment->target_declaration)
1621 record_assignment(*assignment->target_declaration, expr, (assignment->self_referencing || assign_to_subscript));
1624 void Compiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1626 SetForScope<Node *> set(aggregate, &strct);
1627 unused_nodes.insert(&strct);
1628 TraversingVisitor::visit(strct);
1631 void Compiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1634 aggregates[&var] = aggregate;
1637 variables.back()[&var].local = true;
1638 if(var.init_expression)
1639 record_assignment(var, *var.init_expression, false);
1641 unused_nodes.erase(var.type_declaration);
1642 TraversingVisitor::visit(var);
1645 void Compiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1647 SetForScope<Node *> set(aggregate, &iface);
1648 unused_nodes.insert(&iface);
1649 TraversingVisitor::visit(iface);
1652 void Compiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1654 variables.push_back(BlockVariableMap());
1657 SetForScope<bool> set(global_scope, false);
1658 for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1660 func.body.visit(*this);
1663 BlockVariableMap &block_variables = variables.back();
1664 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1665 i->second.conditionally_assigned = true;
1666 for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1667 block_variables[i->get()].referenced = true;
1668 merge_down_variables();
1671 void Compiler::UnusedVariableLocator::merge_down_variables()
1673 BlockVariableMap &parent_variables = variables[variables.size()-2];
1674 BlockVariableMap &block_variables = variables.back();
1675 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1679 if(!i->second.referenced)
1680 unused_nodes.insert(i->first);
1681 clear_assignments(i->second, i->first->interface!="out");
1685 BlockVariableMap::iterator j = parent_variables.find(i->first);
1686 if(j==parent_variables.end())
1687 parent_variables.insert(*i);
1690 if(i->second.referenced || !i->second.conditionally_assigned)
1691 clear_assignments(j->second, !i->second.referenced);
1692 j->second.conditionally_assigned = i->second.conditionally_assigned;
1693 j->second.referenced |= i->second.referenced;
1694 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1697 variables.pop_back();
1700 void Compiler::UnusedVariableLocator::visit(Conditional &cond)
1702 cond.condition->visit(*this);
1703 variables.push_back(BlockVariableMap());
1704 cond.body.visit(*this);
1706 BlockVariableMap if_variables;
1707 swap(variables.back(), if_variables);
1708 cond.else_body.visit(*this);
1710 BlockVariableMap &else_variables = variables.back();
1711 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1713 BlockVariableMap::iterator j = if_variables.find(i->first);
1714 if(j!=if_variables.end())
1716 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1717 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1718 if_variables.erase(j);
1721 i->second.conditionally_assigned = true;
1724 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1726 i->second.conditionally_assigned = true;
1727 else_variables.insert(*i);
1730 merge_down_variables();
1733 void Compiler::UnusedVariableLocator::visit(Iteration &iter)
1735 variables.push_back(BlockVariableMap());
1736 TraversingVisitor::visit(iter);
1738 BlockVariableMap &block_variables = variables.back();
1739 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1740 if(!i->second.local && i->second.referenced)
1741 i->second.assignments.clear();
1743 merge_down_variables();
1747 Compiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1749 conditionally_assigned(false),
1754 void Compiler::UnusedFunctionLocator::visit(FunctionCall &call)
1756 TraversingVisitor::visit(call);
1758 unused_nodes.erase(call.declaration);
1759 if(call.declaration && call.declaration->definition!=call.declaration)
1760 used_definitions.insert(call.declaration->definition);
1763 void Compiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1765 TraversingVisitor::visit(func);
1767 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1768 unused_nodes.insert(&func);
1772 Compiler::NodeRemover::NodeRemover(const set<Node *> &r):
1776 void Compiler::NodeRemover::visit(Block &block)
1778 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
1781 if(to_remove.count(i->get()))
1782 block.body.erase(i++);
1788 void Compiler::NodeRemover::visit(VariableDeclaration &var)
1790 if(to_remove.count(&var))
1792 stage->in_variables.erase(var.name);
1793 stage->out_variables.erase(var.name);
1794 stage->locations.erase(var.name);
1795 if(var.linked_declaration)
1796 var.linked_declaration->linked_declaration = 0;
1798 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1799 var.init_expression = 0;
1802 void Compiler::NodeRemover::visit(Iteration &iter)
1804 if(to_remove.count(iter.init_statement.get()))
1805 iter.init_statement = 0;
1806 TraversingVisitor::visit(iter);
1810 void Compiler::PrecisionRemover::visit(Precision &)
1815 void Compiler::PrecisionRemover::visit(VariableDeclaration &var)
1817 var.precision.clear();
1821 Compiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1825 void Compiler::DefaultPrecisionGenerator::visit(Block &block)
1829 SetForScope<bool> set(toplevel, false);
1830 BlockModifier::visit(block);
1833 Visitor::visit(block);
1836 void Compiler::DefaultPrecisionGenerator::visit(Precision &prec)
1838 have_default.insert(prec.type);
1841 void Compiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1843 if(var.type_declaration)
1846 string type = var.type;
1847 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1849 else if(!type.compare(0, 3, "ivec") || type=="uint")
1852 if(!have_default.count(type))
1854 Precision *prec = new Precision;
1855 if(!type.compare(0, 7, "sampler"))
1856 prec->precision = "lowp";
1857 else if(stage->type==FRAGMENT)
1858 prec->precision = "mediump";
1860 prec->precision = "highp";
1862 insert_nodes.push_back(prec);
1864 have_default.insert(type);
1869 Compiler::LegacyConverter::LegacyConverter():
1870 target_api(get_gl_api()),
1871 target_version(get_glsl_version()),
1875 Compiler::LegacyConverter::LegacyConverter(const Version &v):
1876 target_api(get_gl_api()),
1881 bool Compiler::LegacyConverter::check_version(const Version &feature_version) const
1883 if(target_version<feature_version)
1885 else if(stage->required_version<feature_version)
1886 stage->required_version = feature_version;
1891 bool Compiler::LegacyConverter::check_extension(const Extension &extension) const
1896 vector<const Extension *>::iterator i = find(stage->required_extensions, &extension);
1897 if(i==stage->required_extensions.end())
1898 stage->required_extensions.push_back(&extension);
1903 bool Compiler::LegacyConverter::supports_unified_interface_syntax() const
1905 if(target_api==OPENGL_ES2)
1906 return check_version(Version(3, 0));
1908 return check_version(Version(1, 30));
1911 void Compiler::LegacyConverter::visit(VariableReference &var)
1913 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1915 var.name = "gl_FragColor";
1916 var.declaration = 0;
1919 else if(var.declaration)
1920 type = var.declaration->type;
1925 void Compiler::LegacyConverter::visit(Assignment &assign)
1927 TraversingVisitor::visit(assign);
1928 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1929 assign.target_declaration = 0;
1932 bool Compiler::LegacyConverter::supports_unified_sampling_functions() const
1934 if(target_api==OPENGL_ES2)
1935 return check_version(Version(3, 0));
1937 return check_version(Version(1, 30));
1940 void Compiler::LegacyConverter::visit(FunctionCall &call)
1942 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1944 NodeArray<Expression>::iterator i = call.arguments.begin();
1945 if(i!=call.arguments.end())
1948 if(type=="sampler1D")
1949 call.name = "texture1D";
1950 else if(type=="sampler2D")
1951 call.name = "texture2D";
1952 else if(type=="sampler3D")
1953 call.name = "texture3D";
1954 else if(type=="samplerCube")
1955 call.name = "textureCube";
1956 else if(type=="sampler1DShadow")
1957 call.name = "shadow1D";
1958 else if(type=="sampler2DShadow")
1959 call.name = "shadow2D";
1960 else if(type=="sampler1DArray")
1962 check_extension(EXT_texture_array);
1963 call.name = "texture1DArray";
1965 else if(type=="sampler2DArray")
1967 check_extension(EXT_texture_array);
1968 call.name = "texture2DArray";
1970 else if(type=="sampler1DArrayShadow")
1972 check_extension(EXT_texture_array);
1973 call.name = "shadow1DArray";
1975 else if(type=="sampler2DArrayShadow")
1977 check_extension(EXT_texture_array);
1978 call.name = "shadow2DArray";
1981 for(; i!=call.arguments.end(); ++i)
1986 TraversingVisitor::visit(call);
1989 bool Compiler::LegacyConverter::supports_interface_layouts() const
1991 if(target_api==OPENGL_ES2)
1992 return check_version(Version(3, 0));
1993 else if(check_version(Version(3, 30)))
1996 return check_extension(ARB_explicit_attrib_location);
1999 bool Compiler::LegacyConverter::supports_centroid_sampling() const
2001 if(target_api==OPENGL_ES2)
2002 return check_version(Version(3, 0));
2003 else if(check_version(Version(1, 20)))
2006 return check_extension(EXT_gpu_shader4);
2009 bool Compiler::LegacyConverter::supports_sample_sampling() const
2011 if(target_api==OPENGL_ES2)
2012 return check_version(Version(3, 20));
2013 else if(check_version(Version(4, 0)))
2016 return check_extension(ARB_gpu_shader5);
2019 void Compiler::LegacyConverter::visit(VariableDeclaration &var)
2021 if(var.layout && !supports_interface_layouts())
2023 vector<Layout::Qualifier>::iterator i;
2024 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
2025 if(i!=var.layout->qualifiers.end())
2027 unsigned location = lexical_cast<unsigned>(i->value);
2028 if(stage->type==VERTEX && var.interface=="in")
2030 stage->locations[var.name] = location;
2031 var.layout->qualifiers.erase(i);
2033 else if(stage->type==FRAGMENT && var.interface=="out")
2036 static Require _req(EXT_gpu_shader4);
2037 stage->locations[var.name] = location;
2038 var.layout->qualifiers.erase(i);
2041 if(var.layout->qualifiers.empty())
2046 if(var.sampling=="centroid")
2048 if(!supports_centroid_sampling())
2049 var.sampling = string();
2051 else if(var.sampling=="sample")
2053 if(!supports_sample_sampling())
2054 var.sampling = string();
2057 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
2059 if(stage->type==FRAGMENT && var.interface=="out")
2066 TraversingVisitor::visit(var);
2069 bool Compiler::LegacyConverter::supports_interface_blocks(const string &iface) const
2071 if(target_api==OPENGL_ES2)
2073 if(iface=="uniform")
2074 return check_version(Version(3, 0));
2076 return check_version(Version(3, 20));
2078 else if(check_version(Version(1, 50)))
2080 else if(iface=="uniform")
2081 return check_extension(ARB_uniform_buffer_object);
2086 void Compiler::LegacyConverter::visit(InterfaceBlock &iface)
2088 if(!supports_interface_blocks(iface.interface))
2089 flatten_block(iface.members);