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/strings/format.h>
8 #include <msp/strings/regex.h>
9 #include <msp/strings/utils.h>
12 #include "programcompiler.h"
13 #include "resources.h"
22 const char builtins_src[] =
23 "#pragma MSP stage(vertex)\n"
24 "out gl_PerVertex {\n"
25 " vec4 gl_Position;\n"
26 " float gl_ClipDistance[];\n"
28 "#pragma MSP stage(geometry)\n"
30 " vec4 gl_Position;\n"
31 " float gl_ClipDistance[];\n"
33 "out gl_PerVertex {\n"
34 " vec4 gl_Position;\n"
35 " float gl_ClipDistance[];\n"
43 using namespace ProgramSyntax;
45 ProgramCompiler::ProgramCompiler():
50 ProgramCompiler::~ProgramCompiler()
55 void ProgramCompiler::compile(const string &source, const string &src_name)
59 module = new Module();
61 imported_names.push_back(src_name);
62 append_module(parser.parse(source, src_name, 1));
66 void ProgramCompiler::compile(IO::Base &io, Resources *res, const string &src_name)
70 module = new Module();
72 imported_names.push_back(src_name);
73 append_module(parser.parse(io, src_name, 1));
77 void ProgramCompiler::compile(IO::Base &io, const string &src_name)
79 compile(io, 0, src_name);
82 void ProgramCompiler::add_shaders(Program &program)
85 throw invalid_operation("ProgramCompiler::add_shaders");
89 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
93 program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
94 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
95 program.bind_attribute(j->second, j->first);
97 else if(i->type==GEOMETRY)
98 program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
99 else if(i->type==FRAGMENT)
101 program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
104 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
105 program.bind_fragment_data(j->second, j->first);
110 catch(const compile_error &e)
112 static const Regex r_message("^(([0-9]+)\\(([0-9]+)\\) :|ERROR: ([0-9]+):([0-9]+):) (.*)$");
113 vector<string> lines = split(e.what(), '\n');
115 for(vector<string>::const_iterator i=lines.begin(); i!=lines.end(); ++i)
117 RegMatch m = r_message.match(*i);
124 index = lexical_cast<unsigned>(m[2].str);
125 line = lexical_cast<unsigned>(m[3].str);
129 index = lexical_cast<unsigned>(m[4].str);
130 line = lexical_cast<unsigned>(m[5].str);
132 const char *src = "<unknown>";
135 else if(index-1<imported_names.size())
136 src = imported_names[index-1].c_str();
137 translated += format("%s:%d: %s", src, line, m[6].str);
144 throw compile_error(translated);
148 Module *ProgramCompiler::create_builtins_module()
150 ProgramParser parser;
151 Module *module = new Module(parser.parse(builtins_src, "<builtin>"));
152 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
154 VariableResolver resolver;
155 i->content.visit(resolver);
156 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
157 j->second->linked_declaration = j->second;
162 Module &ProgramCompiler::get_builtins_module()
164 static RefPtr<Module> builtins_module = create_builtins_module();
165 return *builtins_module;
168 Stage *ProgramCompiler::get_builtins(StageType type)
170 Module &module = get_builtins_module();
171 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
177 void ProgramCompiler::append_module(ProgramSyntax::Module &mod)
179 vector<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
180 for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
181 import((*i)->module);
182 apply<NodeRemover>(mod.shared, set<Node *>(imports.begin(), imports.end()));
184 append_stage(mod.shared);
185 for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
189 void ProgramCompiler::append_stage(Stage &stage)
192 if(stage.type==SHARED)
193 target = &module->shared;
196 list<Stage>::iterator i;
197 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
198 if(i==module->stages.end() || i->type>stage.type)
200 list<Stage>::iterator j = module->stages.insert(i, stage.type);
201 if(i!=module->stages.end())
204 if(i!=module->stages.begin())
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 ProgramCompiler::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 ProgramCompiler::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 ProgramParser import_parser;
242 append_module(import_parser.parse(*io, fn, imported_names.size()));
245 void ProgramCompiler::generate(Stage &stage)
247 inject_block(stage.content, module->shared.content);
249 apply<DeclarationReorderer>(stage);
250 apply<FunctionResolver>(stage);
251 apply<VariableResolver>(stage);
252 apply<InterfaceGenerator>(stage);
253 apply<VariableResolver>(stage);
254 apply<DeclarationReorderer>(stage);
255 apply<FunctionResolver>(stage);
256 apply<LegacyConverter>(stage);
259 bool ProgramCompiler::optimize(Stage &stage)
261 apply<ConstantConditionEliminator>(stage);
263 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
264 apply<FunctionInliner>(stage, inlineable);
266 set<Node *> unused = apply<UnusedVariableLocator>(stage);
267 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
268 unused.insert(unused2.begin(), unused2.end());
269 apply<NodeRemover>(stage, unused);
271 return !unused.empty();
274 void ProgramCompiler::finalize(Stage &stage)
276 if(get_gl_api()==OPENGL_ES2)
277 apply<DefaultPrecisionGenerator>(stage);
279 apply<PrecisionRemover>(stage);
282 void ProgramCompiler::inject_block(Block &target, const Block &source)
284 NodeList<Statement>::iterator insert_point = target.body.begin();
285 for(NodeList<Statement>::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
286 target.body.insert(insert_point, (*i)->clone());
290 typename T::ResultType ProgramCompiler::apply(Stage &stage)
293 visitor.apply(stage);
294 return visitor.get_result();
297 template<typename T, typename A>
298 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
301 visitor.apply(stage);
302 return visitor.get_result();
306 ProgramCompiler::Visitor::Visitor():
310 void ProgramCompiler::Visitor::apply(Stage &s)
312 SetForScope<Stage *> set(stage, &s);
313 stage->content.visit(*this);
317 ProgramCompiler::BlockModifier::BlockModifier():
321 void ProgramCompiler::BlockModifier::flatten_block(Block &block)
323 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
327 void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, NodeList<Statement>::iterator &i)
329 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
330 insert_nodes.clear();
333 block.body.erase(i++);
339 void ProgramCompiler::BlockModifier::visit(Block &block)
341 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
344 apply_and_increment(block, i);
349 ProgramCompiler::Formatter::Formatter():
352 parameter_list(false)
355 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
357 GLApi api = get_gl_api();
358 const Version &ver = s.required_version;
362 append(format("#version %d%02d", ver.major, ver.minor));
363 if(api==OPENGL_ES2 && ver>=Version(3, 0))
368 for(vector<const Extension *>::const_iterator i=s.required_extensions.begin(); i!=s.required_extensions.end(); ++i)
369 append(format("#extension %s: require\n", (*i)->get_name()));
370 if(!s.required_extensions.empty())
376 void ProgramCompiler::Formatter::append(const string &text)
379 for(string::const_iterator i=text.begin(); i!=text.end(); ++i)
384 void ProgramCompiler::Formatter::append(char c)
391 void ProgramCompiler::Formatter::set_source(unsigned index, unsigned line)
393 if(index!=source_index || (index && line!=source_line))
395 if(index==source_index && line==source_line+1)
400 if(stage->required_version<Version(3, 30))
402 formatted += format("#line %d %d\n", l, index);
405 source_index = index;
409 void ProgramCompiler::Formatter::visit(Literal &literal)
411 append(literal.token);
414 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
417 parexpr.expression->visit(*this);
421 void ProgramCompiler::Formatter::visit(VariableReference &var)
426 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
428 memacc.left->visit(*this);
429 append(format(".%s", memacc.member));
432 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
436 unary.expression->visit(*this);
441 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
443 binary.left->visit(*this);
445 binary.right->visit(*this);
446 append(binary.after);
449 void ProgramCompiler::Formatter::visit(Assignment &assign)
451 assign.left->visit(*this);
452 append(format(" %s ", assign.oper));
453 assign.right->visit(*this);
456 void ProgramCompiler::Formatter::visit(FunctionCall &call)
458 append(format("%s(", call.name));
459 for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
461 if(i!=call.arguments.begin())
468 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
470 expr.expression->visit(*this);
474 void ProgramCompiler::Formatter::visit(Block &block)
476 unsigned brace_indent = indent;
477 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
479 append(format("%s{\n", string(brace_indent*2, ' ')));
481 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
482 string spaces(indent*2, ' ');
483 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
485 if(i!=block.body.begin())
487 set_source((*i)->source, (*i)->line);
493 append(format("\n%s}", string(brace_indent*2, ' ')));
496 void ProgramCompiler::Formatter::visit(Import &import)
498 append(format("import %s;", import.module));
501 void ProgramCompiler::Formatter::visit(Precision &prec)
503 append(format("precision %s %s;", prec.precision, prec.type));
506 void ProgramCompiler::Formatter::visit(Layout &layout)
509 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
511 if(i!=layout.qualifiers.begin())
513 append(i->identifier);
514 if(!i->value.empty())
515 append(format("=%s", i->value));
520 void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
522 layout.layout.visit(*this);
523 append(format(" %s;", layout.interface));
526 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
528 append(format("struct %s\n", strct.name));
529 strct.members.visit(*this);
533 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
537 var.layout->visit(*this);
542 if(!var.interpolation.empty())
543 append(format("%s ", var.interpolation));
544 if(!var.sampling.empty())
545 append(format("%s ", var.sampling));
546 if(!var.interface.empty() && var.interface!=block_interface)
548 string interface = var.interface;
549 if(stage->required_version<Version(1, 30))
551 if(stage->type==VERTEX && var.interface=="in")
552 interface = "attribute";
553 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
554 interface = "varying";
556 append(format("%s ", interface));
558 if(!var.precision.empty())
559 append(format("%s ", var.precision));
560 append(format("%s %s", var.type, var.name));
565 var.array_size->visit(*this);
568 if(var.init_expression)
571 var.init_expression->visit(*this);
577 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
579 SetForScope<string> set(block_interface, iface.interface);
580 append(format("%s %s\n", iface.interface, iface.name));
581 iface.members.visit(*this);
585 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
587 append(format("%s %s(", func.return_type, func.name));
588 for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
590 if(i!=func.parameters.begin())
592 SetFlag set(parameter_list);
596 if(func.definition==&func)
599 func.body.visit(*this);
605 void ProgramCompiler::Formatter::visit(Conditional &cond)
608 cond.condition->visit(*this);
611 cond.body.visit(*this);
612 if(!cond.else_body.body.empty())
614 Conditional *else_cond = dynamic_cast<Conditional *>(cond.else_body.body.front().get());
615 if(cond.else_body.body.size()==1 && else_cond)
618 set_source(else_cond->source, else_cond->line);
619 append(format("%selse ", string(indent*2, ' ')));
620 else_cond->visit(*this);
624 append(format("\n%selse\n", string(indent*2, ' ')));
625 cond.else_body.visit(*this);
630 void ProgramCompiler::Formatter::visit(Iteration &iter)
632 if(!iter.init_statement && iter.condition && !iter.loop_expression)
635 iter.condition->visit(*this);
641 if(iter.init_statement)
642 iter.init_statement->visit(*this);
648 iter.condition->visit(*this);
651 if(iter.loop_expression)
654 iter.loop_expression->visit(*this);
659 if(iter.body.body.empty())
664 iter.body.visit(*this);
668 void ProgramCompiler::Formatter::visit(Return &ret)
674 ret.expression->visit(*this);
679 void ProgramCompiler::Formatter::visit(Jump &jump)
681 append(jump.keyword);
686 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
690 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
695 SetForScope<bool> set(toplevel, false);
696 BlockModifier::visit(block);
699 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
701 vector<FunctionDeclaration *> &decls = functions[func.name];
704 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
706 (*i)->definition = func.definition;
707 (*i)->body.body.clear();
710 decls.push_back(&func);
713 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
715 VariableDeclaration *&ptr = variables[var.name];
718 ptr->type = var.type;
719 if(var.init_expression)
720 ptr->init_expression = var.init_expression;
725 for(vector<Layout::Qualifier>::iterator i=var.layout->qualifiers.begin(); i!=var.layout->qualifiers.end(); ++i)
728 for(vector<Layout::Qualifier>::iterator j=ptr->layout->qualifiers.begin(); (!found && j!=ptr->layout->qualifiers.end()); ++j)
729 if(j->identifier==i->identifier)
736 ptr->layout->qualifiers.push_back(*i);
740 ptr->layout = var.layout;
749 ProgramCompiler::VariableResolver::VariableResolver():
751 record_target(false),
752 assignment_target(0),
753 self_referencing(false)
756 void ProgramCompiler::VariableResolver::apply(Stage &s)
758 SetForScope<Stage *> set(stage, &s);
759 Stage *builtins = get_builtins(stage->type);
761 blocks.push_back(&builtins->content);
762 stage->content.visit(*this);
767 void ProgramCompiler::VariableResolver::visit(Block &block)
769 blocks.push_back(&block);
770 block.variables.clear();
771 TraversingVisitor::visit(block);
775 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
779 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
782 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
783 if(j!=(*i)->variables.end())
785 var.declaration = j->second;
786 type = j->second->type_declaration;
793 if(assignment_target)
795 record_target = false;
796 assignment_target = 0;
799 assignment_target = var.declaration;
801 else if(var.declaration && var.declaration==assignment_target)
802 self_referencing = true;
805 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
808 TraversingVisitor::visit(memacc);
809 memacc.declaration = 0;
812 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
813 if(i!=type->members.variables.end())
815 memacc.declaration = i->second;
816 type = i->second->type_declaration;
823 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
828 SetForScope<bool> set(record_target, false);
829 binary.right->visit(*this);
832 binary.left->visit(*this);
836 TraversingVisitor::visit(binary);
841 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
844 SetFlag set(record_target);
845 assignment_target = 0;
846 assign.left->visit(*this);
849 self_referencing = false;
850 assign.right->visit(*this);
852 assign.self_referencing = (self_referencing || assign.oper!="=");
853 assign.target_declaration = assignment_target;
856 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
858 TraversingVisitor::visit(strct);
859 blocks.back()->types[strct.name] = &strct;
862 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
864 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
867 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
868 if(j!=(*i)->types.end())
869 var.type_declaration = j->second;
872 if(!block_interface.empty() && var.interface.empty())
873 var.interface = block_interface;
875 TraversingVisitor::visit(var);
876 blocks.back()->variables[var.name] = &var;
877 if(anonymous && blocks.size()>1)
878 blocks[blocks.size()-2]->variables[var.name] = &var;
881 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
883 SetFlag set(anonymous);
884 SetForScope<string> set2(block_interface, iface.interface);
885 TraversingVisitor::visit(iface);
889 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
891 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
892 if(i!=functions.end())
893 call.declaration = i->second.back();
895 TraversingVisitor::visit(call);
898 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
900 vector<FunctionDeclaration *> &decls = functions[func.name];
903 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
904 (*i)->definition = func.definition;
906 decls.push_back(&func);
908 else if(!decls.empty() && decls.back()->definition)
909 func.definition = decls.back()->definition;
911 decls.push_back(&func);
913 TraversingVisitor::visit(func);
917 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
921 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
925 else if(type==GEOMETRY)
931 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
933 SetForScope<Stage *> set(stage, &s);
935 in_prefix = get_out_prefix(stage->previous->type);
936 out_prefix = get_out_prefix(stage->type);
937 stage->content.visit(*this);
940 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
942 SetForScope<unsigned> set(scope_level, scope_level+1);
943 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
949 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
951 NodeList<Statement>::iterator k = block.body.insert(i, j->second);
954 iface_declarations.clear();
957 apply_and_increment(block, i);
961 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
963 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
964 return prefix+name.substr(offset);
967 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
969 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
970 if(stage_vars.count(name) || iface_declarations.count(name))
973 VariableDeclaration* iface_var = new VariableDeclaration;
974 iface_var->sampling = var.sampling;
975 iface_var->interface = iface;
976 iface_var->type = var.type;
977 iface_var->type_declaration = var.type_declaration;
978 iface_var->name = name;
979 if(stage->type==GEOMETRY)
980 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
982 iface_var->array = var.array;
984 iface_var->array_size = var.array_size;
986 iface_var->linked_declaration = &var;
987 iface_declarations[name] = iface_var;
992 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
994 Assignment *assign = new Assignment;
995 VariableReference *ref = new VariableReference;
999 assign->right = right;
1001 ExpressionStatement *stmt = new ExpressionStatement;
1002 stmt->expression = assign;
1004 insert_nodes.push_back(stmt);
1007 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
1009 if(var.declaration || !stage->previous)
1011 if(iface_declarations.count(var.name))
1014 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
1015 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
1016 if(i==prev_out.end())
1017 i = prev_out.find(in_prefix+var.name);
1018 if(i!=prev_out.end())
1020 generate_interface(*i->second, "in", i->second->name);
1021 var.name = i->second->name;
1025 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
1027 if(var.interface=="out")
1030 stage->out_variables[var.name] = &var;
1031 else if(generate_interface(var, "out", change_prefix(var.name, string())))
1034 if(var.init_expression)
1036 insert_assignment(var.name, var.init_expression->clone());
1041 else if(var.interface=="in")
1043 stage->in_variables[var.name] = &var;
1044 if(var.linked_declaration)
1045 var.linked_declaration->linked_declaration = &var;
1046 else if(stage->previous)
1048 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
1049 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
1050 if(i!=prev_out.end())
1052 var.linked_declaration = i->second;
1053 i->second->linked_declaration = &var;
1058 TraversingVisitor::visit(var);
1061 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
1063 vector<VariableDeclaration *> pass_vars;
1065 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
1066 pass_vars.push_back(i->second);
1067 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
1068 if(i->second->interface=="in")
1069 pass_vars.push_back(i->second.get());
1073 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
1074 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
1076 bool linked = false;
1077 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
1078 linked = ((*j)->linked_declaration==i->second);
1080 if(!linked && generate_interface(*i->second, "in", i->second->name))
1081 pass_vars.push_back(i->second);
1085 if(stage->type==GEOMETRY)
1087 VariableReference *ref = new VariableReference;
1088 ref->name = "gl_in";
1090 BinaryExpression *subscript = new BinaryExpression;
1091 subscript->left = ref;
1092 subscript->oper = "[";
1093 subscript->right = pass.subscript;
1094 subscript->after = "]";
1096 MemberAccess *memacc = new MemberAccess;
1097 memacc->left = subscript;
1098 memacc->member = "gl_Position";
1100 insert_assignment("gl_Position", memacc);
1103 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
1105 string out_name = change_prefix((*i)->name, out_prefix);
1106 generate_interface(**i, "out", out_name);
1108 VariableReference *ref = new VariableReference;
1109 ref->name = (*i)->name;
1112 BinaryExpression *subscript = new BinaryExpression;
1113 subscript->left = ref;
1114 subscript->oper = "[";
1115 subscript->right = pass.subscript;
1116 subscript->after = "]";
1117 insert_assignment(out_name, subscript);
1120 insert_assignment(out_name, ref);
1127 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
1129 kind(NO_DECLARATION)
1132 void ProgramCompiler::DeclarationReorderer::visit(FunctionCall &call)
1134 FunctionDeclaration *def = call.declaration;
1136 def = def->definition;
1137 if(def && !ordered_funcs.count(def))
1138 needed_funcs.insert(def);
1141 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
1143 SetForScope<unsigned> set(scope_level, scope_level+1);
1145 return Visitor::visit(block);
1147 NodeList<Statement>::iterator struct_insert_point = block.body.end();
1148 NodeList<Statement>::iterator variable_insert_point = block.body.end();
1149 NodeList<Statement>::iterator function_insert_point = block.body.end();
1150 unsigned unordered_func_count = 0;
1151 bool ordered_any_funcs = false;
1153 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
1155 kind = NO_DECLARATION;
1159 if(kind==STRUCT && struct_insert_point!=block.body.end())
1161 block.body.insert(struct_insert_point, *i);
1164 else if(kind>STRUCT && struct_insert_point==block.body.end())
1165 struct_insert_point = i;
1167 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1169 block.body.insert(variable_insert_point, *i);
1172 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1173 variable_insert_point = i;
1177 if(function_insert_point==block.body.end())
1178 function_insert_point = i;
1180 if(needed_funcs.empty())
1182 ordered_funcs.insert(i->get());
1183 if(i!=function_insert_point)
1185 block.body.insert(function_insert_point, *i);
1189 ++function_insert_point;
1190 ordered_any_funcs = true;
1193 ++unordered_func_count;
1198 if(function_insert_point==i)
1199 ++function_insert_point;
1200 block.body.erase(i++);
1205 if(i==block.body.end() && unordered_func_count)
1207 if(!ordered_any_funcs)
1208 // A subset of the remaining functions forms a recursive loop
1209 /* TODO pick a function and move it up, adding any necessary
1213 i = function_insert_point;
1214 unordered_func_count = 0;
1219 void ProgramCompiler::DeclarationReorderer::visit(ProgramSyntax::VariableDeclaration &var)
1221 Visitor::visit(var);
1225 void ProgramCompiler::DeclarationReorderer::visit(FunctionDeclaration &func)
1227 needed_funcs.clear();
1228 func.body.visit(*this);
1229 needed_funcs.erase(&func);
1234 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1238 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1240 FunctionDeclaration *def = call.declaration;
1241 if(def && def->definition!=def)
1242 def = def->definition;
1246 unsigned &count = refcounts[def];
1248 if(count>1 || def==in_function)
1249 inlineable.erase(def);
1252 TraversingVisitor::visit(call);
1255 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1257 unsigned &count = refcounts[func.definition];
1258 if(!count && func.parameters.empty())
1259 inlineable.insert(func.definition);
1261 SetForScope<FunctionDeclaration *> set(in_function, &func);
1262 TraversingVisitor::visit(func);
1266 ProgramCompiler::FunctionInliner::FunctionInliner():
1270 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1275 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1280 ptr = inline_result;
1283 void ProgramCompiler::FunctionInliner::visit(Block &block)
1288 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1296 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1298 visit_and_inline(unary.expression);
1302 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1304 visit_and_inline(binary.left);
1305 visit_and_inline(binary.right);
1309 void ProgramCompiler::FunctionInliner::visit(MemberAccess &memacc)
1311 visit_and_inline(memacc.left);
1315 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1317 for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1318 visit_and_inline(*i);
1320 FunctionDeclaration *def = call.declaration;
1321 if(def && def->definition!=def)
1322 def = def->definition;
1324 if(def && inlineable.count(def))
1333 void ProgramCompiler::FunctionInliner::visit(VariableDeclaration &var)
1335 if(var.init_expression)
1336 visit_and_inline(var.init_expression);
1340 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1342 TraversingVisitor::visit(ret);
1345 inline_result = ret.expression->clone();
1349 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1355 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1356 variable_values(&v),
1361 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1363 if(literal.token=="true")
1365 else if(literal.token=="false")
1368 result = lexical_cast<float>(literal.token);
1369 result_valid = true;
1372 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1374 parexp.expression->visit(*this);
1377 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1379 if(!var.declaration)
1384 ValueMap::const_iterator i = variable_values->find(var.declaration);
1385 if(i!=variable_values->end())
1386 i->second->visit(*this);
1388 else if(var.declaration->init_expression)
1389 var.declaration->init_expression->visit(*this);
1392 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1394 result_valid = false;
1395 unary.expression->visit(*this);
1402 result_valid = false;
1405 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1407 result_valid = false;
1408 binary.left->visit(*this);
1412 float left_result = result;
1413 result_valid = false;
1414 binary.right->visit(*this);
1418 if(binary.oper=="<")
1419 result = (left_result<result);
1420 else if(binary.oper=="<=")
1421 result = (left_result<=result);
1422 else if(binary.oper==">")
1423 result = (left_result>result);
1424 else if(binary.oper==">=")
1425 result = (left_result>=result);
1426 else if(binary.oper=="==")
1427 result = (left_result==result);
1428 else if(binary.oper=="!=")
1429 result = (left_result!=result);
1430 else if(binary.oper=="&&")
1431 result = (left_result && result);
1432 else if(binary.oper=="||")
1433 result = (left_result || result);
1435 result_valid = false;
1439 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1444 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1446 SetForScope<unsigned> set(scope_level, scope_level+1);
1447 BlockModifier::visit(block);
1449 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1450 variable_values.erase(i->second);
1453 void ProgramCompiler::ConstantConditionEliminator::visit(UnaryExpression &unary)
1455 if(VariableReference *var = dynamic_cast<VariableReference *>(unary.expression.get()))
1456 if(unary.oper=="++" || unary.oper=="--")
1457 variable_values.erase(var->declaration);
1460 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1462 variable_values.erase(assign.target_declaration);
1465 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1467 if(var.constant || scope_level>1)
1468 variable_values[&var] = var.init_expression.get();
1471 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1475 ExpressionEvaluator eval(variable_values);
1476 cond.condition->visit(eval);
1477 if(eval.result_valid)
1479 flatten_block(eval.result ? cond.body : cond.else_body);
1484 TraversingVisitor::visit(cond);
1487 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1493 /* If the loop condition is always false on the first iteration, the
1494 entire loop can be removed */
1495 if(iter.init_statement)
1496 iter.init_statement->visit(*this);
1497 ExpressionEvaluator eval(variable_values);
1498 iter.condition->visit(eval);
1499 if(eval.result_valid && !eval.result)
1506 /* Record all assignments that occur inside the loop body so those
1507 variables won't be considered as constant */
1508 SetFlag set_record(record_only);
1509 TraversingVisitor::visit(iter);
1512 TraversingVisitor::visit(iter);
1514 if(VariableDeclaration *init_decl = dynamic_cast<VariableDeclaration *>(iter.init_statement.get()))
1515 variable_values.erase(init_decl);
1519 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1522 assignment_target(false),
1523 assign_to_subscript(false),
1527 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1529 variables.push_back(BlockVariableMap());
1531 BlockVariableMap &global_variables = variables.back();
1532 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1534 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1536 if(!i->second.referenced)
1538 unused_nodes.insert(i->first);
1539 clear_assignments(i->second, true);
1542 variables.pop_back();
1545 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1547 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1548 if(i!=aggregates.end())
1549 unused_nodes.erase(i->second);
1551 if(var.declaration && !assignment_target)
1553 VariableInfo &var_info = variables.back()[var.declaration];
1554 var_info.assignments.clear();
1555 var_info.referenced = true;
1559 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1561 TraversingVisitor::visit(memacc);
1562 unused_nodes.erase(memacc.declaration);
1565 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1567 if(binary.oper=="[")
1569 if(assignment_target)
1570 assign_to_subscript = true;
1571 binary.left->visit(*this);
1572 SetForScope<bool> set(assignment_target, false);
1573 binary.right->visit(*this);
1576 TraversingVisitor::visit(binary);
1579 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1582 assign_to_subscript = false;
1583 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1584 assign.left->visit(*this);
1586 assign.right->visit(*this);
1587 assignment = &assign;
1590 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool chained)
1592 VariableInfo &var_info = variables.back()[&var];
1594 clear_assignments(var_info, true);
1595 var_info.assignments.push_back(&node);
1596 var_info.conditionally_assigned = false;
1599 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1603 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1604 unused_nodes.insert(*i);
1606 var_info.assignments.clear();
1609 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1612 TraversingVisitor::visit(expr);
1613 if(assignment && assignment->target_declaration)
1614 record_assignment(*assignment->target_declaration, expr, (assignment->self_referencing || assign_to_subscript));
1617 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1619 SetForScope<Node *> set(aggregate, &strct);
1620 unused_nodes.insert(&strct);
1621 TraversingVisitor::visit(strct);
1624 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1627 aggregates[&var] = aggregate;
1630 variables.back()[&var].local = true;
1631 if(var.init_expression)
1632 record_assignment(var, *var.init_expression, false);
1634 unused_nodes.erase(var.type_declaration);
1635 TraversingVisitor::visit(var);
1638 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1640 SetForScope<Node *> set(aggregate, &iface);
1641 unused_nodes.insert(&iface);
1642 TraversingVisitor::visit(iface);
1645 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1647 variables.push_back(BlockVariableMap());
1650 SetForScope<bool> set(global_scope, false);
1651 for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1653 func.body.visit(*this);
1656 BlockVariableMap &block_variables = variables.back();
1657 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1658 i->second.conditionally_assigned = true;
1659 for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1660 block_variables[i->get()].referenced = true;
1661 merge_down_variables();
1664 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1666 BlockVariableMap &parent_variables = variables[variables.size()-2];
1667 BlockVariableMap &block_variables = variables.back();
1668 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1672 if(!i->second.referenced)
1673 unused_nodes.insert(i->first);
1674 clear_assignments(i->second, true);
1678 BlockVariableMap::iterator j = parent_variables.find(i->first);
1679 if(j==parent_variables.end())
1680 parent_variables.insert(*i);
1683 if(i->second.referenced || !i->second.conditionally_assigned)
1684 clear_assignments(j->second, !i->second.referenced);
1685 j->second.conditionally_assigned = i->second.conditionally_assigned;
1686 j->second.referenced |= i->second.referenced;
1687 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1690 variables.pop_back();
1693 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1695 cond.condition->visit(*this);
1696 variables.push_back(BlockVariableMap());
1697 cond.body.visit(*this);
1699 BlockVariableMap if_variables;
1700 swap(variables.back(), if_variables);
1701 cond.else_body.visit(*this);
1703 BlockVariableMap &else_variables = variables.back();
1704 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1706 BlockVariableMap::iterator j = if_variables.find(i->first);
1707 if(j!=if_variables.end())
1709 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1710 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1711 if_variables.erase(j);
1714 i->second.conditionally_assigned = true;
1717 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1719 i->second.conditionally_assigned = true;
1720 else_variables.insert(*i);
1723 merge_down_variables();
1726 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1728 variables.push_back(BlockVariableMap());
1729 TraversingVisitor::visit(iter);
1731 BlockVariableMap &block_variables = variables.back();
1732 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1733 if(!i->second.local && i->second.referenced)
1734 i->second.assignments.clear();
1736 merge_down_variables();
1740 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1742 conditionally_assigned(false),
1747 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1749 TraversingVisitor::visit(call);
1751 unused_nodes.erase(call.declaration);
1752 if(call.declaration && call.declaration->definition!=call.declaration)
1753 used_definitions.insert(call.declaration->definition);
1756 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1758 TraversingVisitor::visit(func);
1760 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1761 unused_nodes.insert(&func);
1765 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1769 void ProgramCompiler::NodeRemover::visit(Block &block)
1771 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
1774 if(to_remove.count(i->get()))
1775 block.body.erase(i++);
1781 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1783 if(to_remove.count(&var))
1785 stage->in_variables.erase(var.name);
1786 stage->out_variables.erase(var.name);
1787 stage->locations.erase(var.name);
1788 if(var.linked_declaration)
1789 var.linked_declaration->linked_declaration = 0;
1791 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1792 var.init_expression = 0;
1795 void ProgramCompiler::NodeRemover::visit(Iteration &iter)
1797 if(to_remove.count(iter.init_statement.get()))
1798 iter.init_statement = 0;
1799 TraversingVisitor::visit(iter);
1803 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1808 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1810 var.precision.clear();
1814 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1818 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1822 SetForScope<bool> set(toplevel, false);
1823 BlockModifier::visit(block);
1826 Visitor::visit(block);
1829 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1831 have_default.insert(prec.type);
1834 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1836 if(var.type_declaration)
1839 string type = var.type;
1840 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1842 else if(!type.compare(0, 3, "ivec") || type=="uint")
1845 if(!have_default.count(type))
1847 Precision *prec = new Precision;
1848 if(!type.compare(0, 7, "sampler"))
1849 prec->precision = "lowp";
1850 else if(stage->type==FRAGMENT)
1851 prec->precision = "mediump";
1853 prec->precision = "highp";
1855 insert_nodes.push_back(prec);
1857 have_default.insert(type);
1862 ProgramCompiler::LegacyConverter::LegacyConverter():
1863 target_api(get_gl_api()),
1864 target_version(get_glsl_version()),
1868 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1869 target_api(get_gl_api()),
1874 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1876 if(target_version<feature_version)
1878 else if(stage->required_version<feature_version)
1879 stage->required_version = feature_version;
1884 bool ProgramCompiler::LegacyConverter::check_extension(const Extension &extension) const
1889 vector<const Extension *>::iterator i = find(stage->required_extensions, &extension);
1890 if(i==stage->required_extensions.end())
1891 stage->required_extensions.push_back(&extension);
1896 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1898 if(target_api==OPENGL_ES2)
1899 return check_version(Version(3, 0));
1901 return check_version(Version(1, 30));
1904 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1906 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1908 var.name = "gl_FragColor";
1909 var.declaration = 0;
1912 else if(var.declaration)
1913 type = var.declaration->type;
1918 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1920 TraversingVisitor::visit(assign);
1921 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1922 assign.target_declaration = 0;
1925 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1927 if(target_api==OPENGL_ES2)
1928 return check_version(Version(3, 0));
1930 return check_version(Version(1, 30));
1933 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1935 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1937 NodeArray<Expression>::iterator i = call.arguments.begin();
1938 if(i!=call.arguments.end())
1941 if(type=="sampler1D")
1942 call.name = "texture1D";
1943 else if(type=="sampler2D")
1944 call.name = "texture2D";
1945 else if(type=="sampler3D")
1946 call.name = "texture3D";
1947 else if(type=="sampler1DShadow")
1948 call.name = "shadow1D";
1949 else if(type=="sampler2DShadow")
1950 call.name = "shadow2D";
1952 for(; i!=call.arguments.end(); ++i)
1957 TraversingVisitor::visit(call);
1960 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1962 if(target_api==OPENGL_ES2)
1963 return check_version(Version(3, 0));
1964 else if(check_version(Version(3, 30)))
1967 return check_extension(ARB_explicit_attrib_location);
1970 bool ProgramCompiler::LegacyConverter::supports_centroid_sampling() const
1972 if(target_api==OPENGL_ES2)
1973 return check_version(Version(3, 0));
1974 else if(check_version(Version(1, 20)))
1977 return check_extension(EXT_gpu_shader4);
1980 bool ProgramCompiler::LegacyConverter::supports_sample_sampling() const
1982 if(target_api==OPENGL_ES2)
1983 return check_version(Version(3, 20));
1984 else if(check_version(Version(4, 0)))
1987 return check_extension(ARB_gpu_shader5);
1990 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1992 if(var.layout && !supports_interface_layouts())
1994 vector<Layout::Qualifier>::iterator i;
1995 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1996 if(i!=var.layout->qualifiers.end())
1998 unsigned location = lexical_cast<unsigned>(i->value);
1999 if(stage->type==VERTEX && var.interface=="in")
2001 stage->locations[var.name] = location;
2002 var.layout->qualifiers.erase(i);
2004 else if(stage->type==FRAGMENT && var.interface=="out")
2007 static Require _req(EXT_gpu_shader4);
2008 stage->locations[var.name] = location;
2009 var.layout->qualifiers.erase(i);
2012 if(var.layout->qualifiers.empty())
2017 if(var.sampling=="centroid")
2019 if(!supports_centroid_sampling())
2020 var.sampling = string();
2022 else if(var.sampling=="sample")
2024 if(!supports_sample_sampling())
2025 var.sampling = string();
2028 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
2030 if(stage->type==FRAGMENT && var.interface=="out")
2037 TraversingVisitor::visit(var);
2040 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
2042 if(target_api==OPENGL_ES2)
2044 if(iface=="uniform")
2045 return check_version(Version(3, 0));
2047 return check_version(Version(3, 20));
2049 else if(check_version(Version(1, 50)))
2051 else if(iface=="uniform")
2052 return check_extension(ARB_uniform_buffer_object);
2057 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
2059 if(!supports_interface_blocks(iface.interface))
2060 flatten_block(iface.members);