1 #include <msp/core/raii.h>
2 #include <msp/gl/extensions/ext_gpu_shader4.h>
3 #include <msp/strings/format.h>
4 #include <msp/strings/utils.h>
7 #include "programcompiler.h"
15 const char builtins_src[] =
16 "#pragma MSP stage(vertex)\n"
17 "out gl_PerVertex {\n"
18 " vec4 gl_Position;\n"
19 " float gl_ClipDistance[];\n"
21 "#pragma MSP stage(geometry)\n"
23 " vec4 gl_Position;\n"
24 " float gl_ClipDistance[];\n"
26 "out gl_PerVertex {\n"
27 " vec4 gl_Position;\n"
28 " float gl_ClipDistance[];\n"
36 using namespace ProgramSyntax;
38 // XXX For some reason global declarations are emitted for otherwise undeclared local variables
40 ProgramCompiler::ProgramCompiler():
45 ProgramCompiler::~ProgramCompiler()
50 void ProgramCompiler::compile(const string &source, const string &src_name)
54 module = new Module();
56 imported_names.insert(src_name);
57 append_module(parser.parse(source, src_name));
61 void ProgramCompiler::compile(IO::Base &io, Resources *res, const string &src_name)
65 module = new Module();
67 imported_names.insert(src_name);
68 append_module(parser.parse(io, src_name));
72 void ProgramCompiler::compile(IO::Base &io, const string &src_name)
74 compile(io, 0, src_name);
77 void ProgramCompiler::add_shaders(Program &program)
80 throw invalid_operation("ProgramCompiler::add_shaders");
82 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
86 program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
87 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
88 program.bind_attribute(j->second, j->first);
90 else if(i->type==GEOMETRY)
91 program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
92 else if(i->type==FRAGMENT)
94 program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
97 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
98 program.bind_fragment_data(j->second, j->first);
104 Module *ProgramCompiler::create_builtins_module()
106 ProgramParser parser;
107 Module *module = new Module(parser.parse(builtins_src, "<builtin>"));
108 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
110 VariableResolver resolver;
111 i->content.visit(resolver);
112 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
113 j->second->linked_declaration = j->second;
118 Module &ProgramCompiler::get_builtins_module()
120 static RefPtr<Module> builtins_module = create_builtins_module();
121 return *builtins_module;
124 Stage *ProgramCompiler::get_builtins(StageType type)
126 Module &module = get_builtins_module();
127 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
133 void ProgramCompiler::append_module(ProgramSyntax::Module &mod)
135 vector<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
136 for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
137 import((*i)->module);
138 apply<NodeRemover>(mod.shared, set<Node *>(imports.begin(), imports.end()));
140 append_stage(mod.shared);
141 for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
145 void ProgramCompiler::append_stage(Stage &stage)
148 if(stage.type==SHARED)
149 target = &module->shared;
152 list<Stage>::iterator i;
153 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
154 if(i==module->stages.end() || i->type>stage.type)
156 list<Stage>::iterator j = module->stages.insert(i, stage.type);
157 if(i!=module->stages.end())
160 if(i!=module->stages.begin())
167 for(NodeList<Node>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
168 target->content.body.push_back(*i);
169 apply<DeclarationCombiner>(*target);
172 void ProgramCompiler::process()
174 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
176 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
179 i = module->stages.begin();
183 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
187 void ProgramCompiler::import(const string &name)
189 string fn = name+".glsl";
190 if(imported_names.count(fn))
192 imported_names.insert(fn);
194 RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
196 throw runtime_error(format("module %s not found", name));
197 ProgramParser import_parser;
198 append_module(import_parser.parse(*io, fn));
201 void ProgramCompiler::generate(Stage &stage)
203 inject_block(stage.content, module->shared.content);
205 apply<DeclarationReorderer>(stage);
206 apply<FunctionResolver>(stage);
207 apply<VariableResolver>(stage);
208 apply<InterfaceGenerator>(stage);
209 apply<VariableResolver>(stage);
210 apply<DeclarationReorderer>(stage);
211 apply<FunctionResolver>(stage);
212 apply<LegacyConverter>(stage);
215 bool ProgramCompiler::optimize(Stage &stage)
217 apply<ConstantConditionEliminator>(stage);
219 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
220 apply<FunctionInliner>(stage, inlineable);
222 set<Node *> unused = apply<UnusedVariableLocator>(stage);
223 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
224 unused.insert(unused2.begin(), unused2.end());
225 apply<NodeRemover>(stage, unused);
227 return !unused.empty();
230 void ProgramCompiler::finalize(Stage &stage)
232 if(get_gl_api()==OPENGL_ES2)
233 apply<DefaultPrecisionGenerator>(stage);
235 apply<PrecisionRemover>(stage);
238 void ProgramCompiler::inject_block(Block &target, const Block &source)
240 list<RefPtr<Node> >::iterator insert_point = target.body.begin();
241 for(list<RefPtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
242 target.body.insert(insert_point, (*i)->clone());
246 typename T::ResultType ProgramCompiler::apply(Stage &stage)
249 visitor.apply(stage);
250 return visitor.get_result();
253 template<typename T, typename A>
254 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
257 visitor.apply(stage);
258 return visitor.get_result();
262 ProgramCompiler::Visitor::Visitor():
266 void ProgramCompiler::Visitor::apply(Stage &s)
268 SetForScope<Stage *> set(stage, &s);
269 stage->content.visit(*this);
273 ProgramCompiler::BlockModifier::BlockModifier():
277 void ProgramCompiler::BlockModifier::flatten_block(Block &block)
279 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
283 void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
285 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
286 insert_nodes.clear();
289 block.body.erase(i++);
295 void ProgramCompiler::BlockModifier::visit(Block &block)
297 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
300 apply_and_increment(block, i);
305 ProgramCompiler::Formatter::Formatter():
307 parameter_list(false),
311 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
313 GLApi api = get_gl_api();
314 const Version &ver = s.required_version;
318 formatted += format("#version %d%02d", ver.major, ver.minor);
319 if(api==OPENGL_ES2 && ver>=Version(3, 0))
327 void ProgramCompiler::Formatter::visit(Literal &literal)
329 formatted += literal.token;
332 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
335 parexpr.expression->visit(*this);
339 void ProgramCompiler::Formatter::visit(VariableReference &var)
341 formatted += var.name;
344 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
346 memacc.left->visit(*this);
347 formatted += format(".%s", memacc.member);
350 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
353 formatted += unary.oper;
354 unary.expression->visit(*this);
356 formatted += unary.oper;
359 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
361 binary.left->visit(*this);
362 formatted += binary.oper;
363 binary.right->visit(*this);
364 formatted += binary.after;
367 void ProgramCompiler::Formatter::visit(Assignment &assign)
369 assign.left->visit(*this);
370 formatted += format(" %s ", assign.oper);
371 assign.right->visit(*this);
374 void ProgramCompiler::Formatter::visit(FunctionCall &call)
376 formatted += format("%s(", call.name);
377 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
379 if(i!=call.arguments.begin())
386 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
388 expr.expression->visit(*this);
392 void ProgramCompiler::Formatter::visit(Block &block)
397 unsigned brace_indent = indent;
398 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
400 formatted += format("%s{\n", string(brace_indent*2, ' '));
402 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
403 string spaces(indent*2, ' ');
404 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
406 if(i!=block.body.begin())
414 formatted += format("\n%s}", string(brace_indent*2, ' '));
417 void ProgramCompiler::Formatter::visit(Import &import)
419 formatted += format("import %s;", import.module);
422 void ProgramCompiler::Formatter::visit(Precision &prec)
424 formatted += format("precision %s %s;", prec.precision, prec.type);
427 void ProgramCompiler::Formatter::visit(Layout &layout)
429 formatted += "layout(";
430 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
432 if(i!=layout.qualifiers.begin())
434 formatted += i->identifier;
435 if(!i->value.empty())
436 formatted += format("=%s", i->value);
441 void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
443 layout.layout.visit(*this);
444 formatted += format(" %s;", layout.interface);
447 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
449 formatted += format("struct %s\n", strct.name);
450 strct.members.visit(*this);
454 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
458 var.layout->visit(*this);
462 formatted += "const ";
463 if(!var.sampling.empty())
464 formatted += format("%s ", var.sampling);
465 if(!var.interface.empty() && var.interface!=block_interface)
467 string interface = var.interface;
468 if(stage->required_version<Version(1, 30))
470 if(stage->type==VERTEX && var.interface=="in")
471 interface = "attribute";
472 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
473 interface = "varying";
475 formatted += format("%s ", interface);
477 if(!var.precision.empty())
478 formatted += format("%s ", var.precision);
479 formatted += format("%s %s", var.type, var.name);
484 var.array_size->visit(*this);
487 if(var.init_expression)
490 var.init_expression->visit(*this);
496 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
498 SetForScope<string> set(block_interface, iface.interface);
499 formatted += format("%s %s\n", iface.interface, iface.name);
500 iface.members.visit(*this);
504 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
506 formatted += format("%s %s(", func.return_type, func.name);
507 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
509 if(i!=func.parameters.begin())
511 SetFlag set(parameter_list);
515 if(func.definition==&func)
518 func.body.visit(*this);
524 void ProgramCompiler::Formatter::visit(Conditional &cond)
527 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
532 cond.condition->visit(*this);
535 cond.body.visit(*this);
536 if(!cond.else_body.body.empty())
538 formatted += format("\n%selse\n", string(indent*2, ' '));
539 SetForScope<unsigned> set(else_if, 2);
540 cond.else_body.visit(*this);
544 void ProgramCompiler::Formatter::visit(Iteration &iter)
547 iter.init_statement->visit(*this);
549 iter.condition->visit(*this);
551 iter.loop_expression->visit(*this);
553 iter.body.visit(*this);
556 void ProgramCompiler::Formatter::visit(Return &ret)
558 formatted += "return ";
559 ret.expression->visit(*this);
563 void ProgramCompiler::Formatter::visit(Jump &jump)
565 formatted += jump.keyword;
570 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
574 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
579 SetForScope<bool> set(toplevel, false);
580 BlockModifier::visit(block);
583 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
585 vector<FunctionDeclaration *> &decls = functions[func.name];
588 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
590 (*i)->definition = func.definition;
591 (*i)->body.body.clear();
594 decls.push_back(&func);
597 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
599 VariableDeclaration *&ptr = variables[var.name];
602 ptr->type = var.type;
603 if(var.init_expression)
604 ptr->init_expression = var.init_expression;
612 ProgramCompiler::VariableResolver::VariableResolver():
614 record_target(false),
615 assignment_target(0),
616 self_referencing(false)
619 void ProgramCompiler::VariableResolver::apply(Stage &s)
621 SetForScope<Stage *> set(stage, &s);
622 Stage *builtins = get_builtins(stage->type);
624 blocks.push_back(&builtins->content);
625 stage->content.visit(*this);
630 void ProgramCompiler::VariableResolver::visit(Block &block)
632 blocks.push_back(&block);
633 block.variables.clear();
634 TraversingVisitor::visit(block);
638 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
642 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
645 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
646 if(j!=(*i)->variables.end())
648 var.declaration = j->second;
649 type = j->second->type_declaration;
656 if(assignment_target)
658 record_target = false;
659 assignment_target = 0;
662 assignment_target = var.declaration;
664 else if(var.declaration && var.declaration==assignment_target)
665 self_referencing = true;
668 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
671 TraversingVisitor::visit(memacc);
672 memacc.declaration = 0;
675 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
676 if(i!=type->members.variables.end())
678 memacc.declaration = i->second;
679 type = i->second->type_declaration;
686 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
691 SetForScope<bool> set(record_target, false);
692 binary.right->visit(*this);
695 binary.left->visit(*this);
699 TraversingVisitor::visit(binary);
704 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
707 SetFlag set(record_target);
708 assignment_target = 0;
709 assign.left->visit(*this);
712 self_referencing = false;
713 assign.right->visit(*this);
715 assign.self_referencing = (self_referencing || assign.oper!="=");
716 assign.target_declaration = assignment_target;
719 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
721 TraversingVisitor::visit(strct);
722 blocks.back()->types[strct.name] = &strct;
725 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
727 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
730 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
731 if(j!=(*i)->types.end())
732 var.type_declaration = j->second;
735 if(!block_interface.empty() && var.interface.empty())
736 var.interface = block_interface;
738 TraversingVisitor::visit(var);
739 blocks.back()->variables[var.name] = &var;
740 if(anonymous && blocks.size()>1)
741 blocks[blocks.size()-2]->variables[var.name] = &var;
744 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
746 SetFlag set(anonymous);
747 SetForScope<string> set2(block_interface, iface.interface);
748 TraversingVisitor::visit(iface);
752 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
754 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
755 if(i!=functions.end())
756 call.declaration = i->second.back();
758 TraversingVisitor::visit(call);
761 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
763 vector<FunctionDeclaration *> &decls = functions[func.name];
766 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
767 (*i)->definition = func.definition;
769 decls.push_back(&func);
771 else if(!decls.empty() && decls.back()->definition)
772 func.definition = decls.back()->definition;
774 decls.push_back(&func);
776 TraversingVisitor::visit(func);
780 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
784 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
788 else if(type==GEOMETRY)
794 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
796 SetForScope<Stage *> set(stage, &s);
798 in_prefix = get_out_prefix(stage->previous->type);
799 out_prefix = get_out_prefix(stage->type);
800 stage->content.visit(*this);
803 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
805 SetForScope<unsigned> set(scope_level, scope_level+1);
806 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
812 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
814 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
817 iface_declarations.clear();
820 apply_and_increment(block, i);
824 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
826 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
827 return prefix+name.substr(offset);
830 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
832 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
833 if(stage_vars.count(name) || iface_declarations.count(name))
836 VariableDeclaration* iface_var = new VariableDeclaration;
837 iface_var->sampling = var.sampling;
838 iface_var->interface = iface;
839 iface_var->type = var.type;
840 iface_var->type_declaration = var.type_declaration;
841 iface_var->name = name;
842 if(stage->type==GEOMETRY)
843 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
845 iface_var->array = var.array;
847 iface_var->array_size = var.array_size;
849 iface_var->linked_declaration = &var;
850 iface_declarations[name] = iface_var;
855 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
857 Assignment *assign = new Assignment;
858 VariableReference *ref = new VariableReference;
862 assign->right = right;
864 ExpressionStatement *stmt = new ExpressionStatement;
865 stmt->expression = assign;
867 insert_nodes.push_back(stmt);
870 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
872 if(var.declaration || !stage->previous)
874 if(iface_declarations.count(var.name))
877 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
878 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
879 if(i==prev_out.end())
880 i = prev_out.find(in_prefix+var.name);
881 if(i!=prev_out.end())
883 generate_interface(*i->second, "in", i->second->name);
884 var.name = i->second->name;
888 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
890 if(var.interface=="out")
893 stage->out_variables[var.name] = &var;
894 else if(generate_interface(var, "out", change_prefix(var.name, string())))
897 if(var.init_expression)
899 insert_assignment(var.name, var.init_expression->clone());
904 else if(var.interface=="in")
906 stage->in_variables[var.name] = &var;
907 if(var.linked_declaration)
908 var.linked_declaration->linked_declaration = &var;
909 else if(stage->previous)
911 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
912 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
913 if(i!=prev_out.end())
915 var.linked_declaration = i->second;
916 i->second->linked_declaration = &var;
921 TraversingVisitor::visit(var);
924 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
926 vector<VariableDeclaration *> pass_vars;
928 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
929 pass_vars.push_back(i->second);
930 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
931 if(i->second->interface=="in")
932 pass_vars.push_back(i->second.get());
936 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
937 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
940 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
941 linked = ((*j)->linked_declaration==i->second);
943 if(!linked && generate_interface(*i->second, "in", i->second->name))
944 pass_vars.push_back(i->second);
948 if(stage->type==GEOMETRY)
950 VariableReference *ref = new VariableReference;
953 BinaryExpression *subscript = new BinaryExpression;
954 subscript->left = ref;
955 subscript->oper = "[";
956 subscript->right = pass.subscript;
957 subscript->after = "]";
959 MemberAccess *memacc = new MemberAccess;
960 memacc->left = subscript;
961 memacc->member = "gl_Position";
963 insert_assignment("gl_Position", memacc);
966 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
968 string out_name = change_prefix((*i)->name, out_prefix);
969 generate_interface(**i, "out", out_name);
971 VariableReference *ref = new VariableReference;
972 ref->name = (*i)->name;
975 BinaryExpression *subscript = new BinaryExpression;
976 subscript->left = ref;
977 subscript->oper = "[";
978 subscript->right = pass.subscript;
979 subscript->after = "]";
980 insert_assignment(out_name, subscript);
983 insert_assignment(out_name, ref);
990 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
995 void ProgramCompiler::DeclarationReorderer::visit(FunctionCall &call)
997 FunctionDeclaration *def = call.declaration;
999 def = def->definition;
1000 if(def && !ordered_funcs.count(def))
1001 needed_funcs.insert(def);
1004 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
1006 SetForScope<unsigned> set(scope_level, scope_level+1);
1008 return Visitor::visit(block);
1010 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
1011 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
1012 list<RefPtr<Node> >::iterator function_insert_point = block.body.end();
1013 unsigned unordered_func_count = 0;
1014 bool ordered_any_funcs = false;
1016 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1018 kind = NO_DECLARATION;
1022 if(kind==STRUCT && struct_insert_point!=block.body.end())
1024 block.body.insert(struct_insert_point, *i);
1027 else if(kind>STRUCT && struct_insert_point==block.body.end())
1028 struct_insert_point = i;
1030 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1032 block.body.insert(variable_insert_point, *i);
1035 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1036 variable_insert_point = i;
1040 if(function_insert_point==block.body.end())
1041 function_insert_point = i;
1043 if(needed_funcs.empty())
1045 ordered_funcs.insert(i->get());
1046 if(i!=function_insert_point)
1048 block.body.insert(function_insert_point, *i);
1052 ++function_insert_point;
1053 ordered_any_funcs = true;
1056 ++unordered_func_count;
1061 if(function_insert_point==i)
1062 ++function_insert_point;
1063 block.body.erase(i++);
1068 if(i==block.body.end() && unordered_func_count)
1070 if(!ordered_any_funcs)
1071 // A subset of the remaining functions forms a recursive loop
1072 /* TODO pick a function and move it up, adding any necessary
1076 i = function_insert_point;
1077 unordered_func_count = 0;
1082 void ProgramCompiler::DeclarationReorderer::visit(ProgramSyntax::VariableDeclaration &var)
1084 Visitor::visit(var);
1088 void ProgramCompiler::DeclarationReorderer::visit(FunctionDeclaration &func)
1090 needed_funcs.clear();
1091 func.body.visit(*this);
1092 needed_funcs.erase(&func);
1097 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1101 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1103 FunctionDeclaration *def = call.declaration;
1104 if(def && def->definition!=def)
1105 def = def->definition;
1109 unsigned &count = refcounts[def];
1111 if(count>1 || def==in_function)
1112 inlineable.erase(def);
1115 TraversingVisitor::visit(call);
1118 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1120 unsigned &count = refcounts[func.definition];
1121 if(!count && func.parameters.empty())
1122 inlineable.insert(func.definition);
1124 SetForScope<FunctionDeclaration *> set(in_function, &func);
1125 TraversingVisitor::visit(func);
1129 ProgramCompiler::FunctionInliner::FunctionInliner():
1133 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1138 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1143 ptr = inline_result;
1146 void ProgramCompiler::FunctionInliner::visit(Block &block)
1151 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1159 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1161 visit_and_inline(unary.expression);
1165 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1167 visit_and_inline(binary.left);
1168 visit_and_inline(binary.right);
1172 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1174 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1175 visit_and_inline(*i);
1177 FunctionDeclaration *def = call.declaration;
1178 if(def && def->definition!=def)
1179 def = def->definition;
1181 if(def && inlineable.count(def))
1190 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1192 TraversingVisitor::visit(ret);
1195 inline_result = ret.expression->clone();
1199 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1205 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1206 variable_values(&v),
1211 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1213 if(literal.token=="true")
1215 else if(literal.token=="false")
1218 result = lexical_cast<float>(literal.token);
1219 result_valid = true;
1222 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1224 parexp.expression->visit(*this);
1227 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1229 if(!var.declaration)
1234 ValueMap::const_iterator i = variable_values->find(var.declaration);
1235 if(i!=variable_values->end())
1236 i->second->visit(*this);
1238 else if(var.declaration->init_expression)
1239 var.declaration->init_expression->visit(*this);
1242 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1244 result_valid = false;
1245 unary.expression->visit(*this);
1252 result_valid = false;
1255 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1257 result_valid = false;
1258 binary.left->visit(*this);
1262 float left_result = result;
1263 result_valid = false;
1264 binary.right->visit(*this);
1268 if(binary.oper=="<")
1269 result = (left_result<result);
1270 else if(binary.oper=="<=")
1271 result = (left_result<=result);
1272 else if(binary.oper==">")
1273 result = (left_result>result);
1274 else if(binary.oper==">=")
1275 result = (left_result>=result);
1276 else if(binary.oper=="==")
1277 result = (left_result==result);
1278 else if(binary.oper=="!=")
1279 result = (left_result!=result);
1280 else if(binary.oper=="&&")
1281 result = (left_result && result);
1282 else if(binary.oper=="||")
1283 result = (left_result || result);
1285 result_valid = false;
1289 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1293 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1295 SetForScope<unsigned> set(scope_level, scope_level+1);
1296 BlockModifier::visit(block);
1298 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1299 variable_values.erase(i->second);
1302 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1304 variable_values.erase(assign.target_declaration);
1307 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1309 if(var.constant || scope_level>1)
1310 variable_values[&var] = var.init_expression.get();
1313 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1315 ExpressionEvaluator eval(variable_values);
1316 cond.condition->visit(eval);
1317 if(eval.result_valid)
1318 flatten_block(eval.result ? cond.body : cond.else_body);
1320 TraversingVisitor::visit(cond);
1323 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1327 ExpressionEvaluator eval;
1328 iter.condition->visit(eval);
1329 if(eval.result_valid && !eval.result)
1336 TraversingVisitor::visit(iter);
1340 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1343 assignment_target(false),
1347 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1349 variables.push_back(BlockVariableMap());
1351 BlockVariableMap &global_variables = variables.back();
1352 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1354 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1356 if(!i->second.referenced)
1358 unused_nodes.insert(i->first);
1359 clear_assignments(i->second, true);
1362 variables.pop_back();
1365 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1367 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1368 if(i!=aggregates.end())
1369 unused_nodes.erase(i->second);
1371 if(var.declaration && !assignment_target)
1373 VariableInfo &var_info = variables.back()[var.declaration];
1374 var_info.assignments.clear();
1375 var_info.referenced = true;
1379 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1381 TraversingVisitor::visit(memacc);
1382 unused_nodes.erase(memacc.declaration);
1385 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1387 if(binary.oper=="[")
1389 binary.left->visit(*this);
1390 SetForScope<bool> set(assignment_target, false);
1391 binary.right->visit(*this);
1394 TraversingVisitor::visit(binary);
1397 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1400 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1401 assign.left->visit(*this);
1403 assign.right->visit(*this);
1404 assignment = &assign;
1407 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1409 VariableInfo &var_info = variables.back()[&var];
1411 clear_assignments(var_info, true);
1412 var_info.assignments.push_back(&node);
1413 var_info.conditionally_assigned = false;
1416 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1420 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1421 unused_nodes.insert(*i);
1423 var_info.assignments.clear();
1426 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1429 TraversingVisitor::visit(expr);
1430 if(assignment && assignment->target_declaration)
1431 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1434 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1436 SetForScope<Node *> set(aggregate, &strct);
1437 unused_nodes.insert(&strct);
1438 TraversingVisitor::visit(strct);
1441 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1444 aggregates[&var] = aggregate;
1447 variables.back()[&var].local = true;
1448 if(var.init_expression)
1449 record_assignment(var, *var.init_expression, false);
1451 unused_nodes.erase(var.type_declaration);
1452 TraversingVisitor::visit(var);
1455 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1457 SetForScope<Node *> set(aggregate, &iface);
1458 unused_nodes.insert(&iface);
1459 TraversingVisitor::visit(iface);
1462 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1464 variables.push_back(BlockVariableMap());
1467 SetForScope<bool> set(global_scope, false);
1468 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1470 func.body.visit(*this);
1473 BlockVariableMap &block_variables = variables.back();
1474 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1475 i->second.conditionally_assigned = true;
1476 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1477 block_variables[i->get()].referenced = true;
1478 merge_down_variables();
1481 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1483 BlockVariableMap &parent_variables = variables[variables.size()-2];
1484 BlockVariableMap &block_variables = variables.back();
1485 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1489 if(!i->second.referenced)
1490 unused_nodes.insert(i->first);
1491 clear_assignments(i->second, true);
1495 BlockVariableMap::iterator j = parent_variables.find(i->first);
1496 if(j==parent_variables.end())
1497 parent_variables.insert(*i);
1500 if(i->second.referenced || !i->second.conditionally_assigned)
1501 clear_assignments(j->second, !i->second.referenced);
1502 j->second.conditionally_assigned = i->second.conditionally_assigned;
1503 j->second.referenced |= i->second.referenced;
1504 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1507 variables.pop_back();
1510 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1512 cond.condition->visit(*this);
1513 variables.push_back(BlockVariableMap());
1514 cond.body.visit(*this);
1516 BlockVariableMap if_variables;
1517 swap(variables.back(), if_variables);
1518 cond.else_body.visit(*this);
1520 BlockVariableMap &else_variables = variables.back();
1521 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1523 BlockVariableMap::iterator j = if_variables.find(i->first);
1524 if(j!=if_variables.end())
1526 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1527 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1528 if_variables.erase(j);
1531 i->second.conditionally_assigned = true;
1534 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1536 i->second.conditionally_assigned = true;
1537 else_variables.insert(*i);
1540 merge_down_variables();
1543 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1545 variables.push_back(BlockVariableMap());
1546 TraversingVisitor::visit(iter);
1548 BlockVariableMap &block_variables = variables.back();
1549 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1550 if(!i->second.local && i->second.referenced)
1551 i->second.assignments.clear();
1553 merge_down_variables();
1557 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1559 conditionally_assigned(false),
1564 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1566 TraversingVisitor::visit(call);
1568 unused_nodes.erase(call.declaration);
1569 if(call.declaration && call.declaration->definition!=call.declaration)
1570 used_definitions.insert(call.declaration->definition);
1573 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1575 TraversingVisitor::visit(func);
1577 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1578 unused_nodes.insert(&func);
1582 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1586 void ProgramCompiler::NodeRemover::visit(Block &block)
1588 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1591 if(to_remove.count(i->get()))
1592 block.body.erase(i++);
1598 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1600 if(to_remove.count(&var))
1602 stage->in_variables.erase(var.name);
1603 stage->out_variables.erase(var.name);
1604 stage->locations.erase(var.name);
1605 if(var.linked_declaration)
1606 var.linked_declaration->linked_declaration = 0;
1608 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1609 var.init_expression = 0;
1613 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1618 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1620 var.precision.clear();
1624 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1628 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1632 SetForScope<bool> set(toplevel, false);
1633 BlockModifier::visit(block);
1636 Visitor::visit(block);
1639 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1641 have_default.insert(prec.type);
1644 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1646 if(var.type_declaration)
1649 string type = var.type;
1650 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1652 else if(!type.compare(0, 3, "ivec") || type=="uint")
1655 if(!have_default.count(type))
1657 Precision *prec = new Precision;
1658 if(!type.compare(0, 7, "sampler"))
1659 prec->precision = "lowp";
1660 else if(stage->type==FRAGMENT)
1661 prec->precision = "mediump";
1663 prec->precision = "highp";
1665 insert_nodes.push_back(prec);
1667 have_default.insert(type);
1672 ProgramCompiler::LegacyConverter::LegacyConverter():
1673 target_api(get_gl_api()),
1674 target_version(get_glsl_version()),
1678 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1679 target_api(get_gl_api()),
1684 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1686 if(target_version<feature_version)
1688 else if(stage->required_version<feature_version)
1689 stage->required_version = feature_version;
1694 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1696 if(target_api==OPENGL_ES2)
1697 return check_version(Version(3, 0));
1699 return check_version(Version(1, 30));
1702 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1704 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1706 var.name = "gl_FragColor";
1707 var.declaration = 0;
1710 else if(var.declaration)
1711 type = var.declaration->type;
1716 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1718 TraversingVisitor::visit(assign);
1719 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1720 assign.target_declaration = 0;
1723 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1725 if(target_api==OPENGL_ES2)
1726 return check_version(Version(3, 0));
1728 return check_version(Version(1, 30));
1731 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1733 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1735 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1736 if(i!=call.arguments.end())
1739 if(type=="sampler1D")
1740 call.name = "texture1D";
1741 else if(type=="sampler2D")
1742 call.name = "texture2D";
1743 else if(type=="sampler3D")
1744 call.name = "texture3D";
1745 else if(type=="sampler1DShadow")
1746 call.name = "shadow1D";
1747 else if(type=="sampler2DShadow")
1748 call.name = "shadow2D";
1750 for(; i!=call.arguments.end(); ++i)
1755 TraversingVisitor::visit(call);
1758 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1760 if(target_api==OPENGL_ES2)
1761 return check_version(Version(3, 0));
1763 return check_version(Version(3, 30));
1766 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1768 if(var.layout && !supports_interface_layouts())
1770 vector<Layout::Qualifier>::iterator i;
1771 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1772 if(i!=var.layout->qualifiers.end())
1774 unsigned location = lexical_cast<unsigned>(i->value);
1775 if(stage->type==VERTEX && var.interface=="in")
1777 stage->locations[var.name] = location;
1778 var.layout->qualifiers.erase(i);
1780 else if(stage->type==FRAGMENT && var.interface=="out")
1783 static Require _req(EXT_gpu_shader4);
1784 stage->locations[var.name] = location;
1785 var.layout->qualifiers.erase(i);
1788 if(var.layout->qualifiers.empty())
1793 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1795 if(stage->type==FRAGMENT && var.interface=="out")
1802 TraversingVisitor::visit(var);
1805 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1807 if(target_api==OPENGL_ES2)
1809 if(iface=="uniform")
1810 return check_version(Version(3, 0));
1812 return check_version(Version(3, 20));
1815 return check_version(Version(1, 50));
1818 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1820 if(!supports_interface_blocks(iface.interface))
1821 flatten_block(iface.members);