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.interpolation.empty())
464 formatted += format("%s ", var.interpolation);
465 if(!var.sampling.empty())
466 formatted += format("%s ", var.sampling);
467 if(!var.interface.empty() && var.interface!=block_interface)
469 string interface = var.interface;
470 if(stage->required_version<Version(1, 30))
472 if(stage->type==VERTEX && var.interface=="in")
473 interface = "attribute";
474 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
475 interface = "varying";
477 formatted += format("%s ", interface);
479 if(!var.precision.empty())
480 formatted += format("%s ", var.precision);
481 formatted += format("%s %s", var.type, var.name);
486 var.array_size->visit(*this);
489 if(var.init_expression)
492 var.init_expression->visit(*this);
498 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
500 SetForScope<string> set(block_interface, iface.interface);
501 formatted += format("%s %s\n", iface.interface, iface.name);
502 iface.members.visit(*this);
506 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
508 formatted += format("%s %s(", func.return_type, func.name);
509 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
511 if(i!=func.parameters.begin())
513 SetFlag set(parameter_list);
517 if(func.definition==&func)
520 func.body.visit(*this);
526 void ProgramCompiler::Formatter::visit(Conditional &cond)
529 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
534 cond.condition->visit(*this);
537 cond.body.visit(*this);
538 if(!cond.else_body.body.empty())
540 formatted += format("\n%selse\n", string(indent*2, ' '));
541 SetForScope<unsigned> set(else_if, 2);
542 cond.else_body.visit(*this);
546 void ProgramCompiler::Formatter::visit(Iteration &iter)
549 iter.init_statement->visit(*this);
551 iter.condition->visit(*this);
553 iter.loop_expression->visit(*this);
555 iter.body.visit(*this);
558 void ProgramCompiler::Formatter::visit(Return &ret)
560 formatted += "return";
564 ret.expression->visit(*this);
569 void ProgramCompiler::Formatter::visit(Jump &jump)
571 formatted += jump.keyword;
576 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
580 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
585 SetForScope<bool> set(toplevel, false);
586 BlockModifier::visit(block);
589 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
591 vector<FunctionDeclaration *> &decls = functions[func.name];
594 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
596 (*i)->definition = func.definition;
597 (*i)->body.body.clear();
600 decls.push_back(&func);
603 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
605 VariableDeclaration *&ptr = variables[var.name];
608 ptr->type = var.type;
609 if(var.init_expression)
610 ptr->init_expression = var.init_expression;
618 ProgramCompiler::VariableResolver::VariableResolver():
620 record_target(false),
621 assignment_target(0),
622 self_referencing(false)
625 void ProgramCompiler::VariableResolver::apply(Stage &s)
627 SetForScope<Stage *> set(stage, &s);
628 Stage *builtins = get_builtins(stage->type);
630 blocks.push_back(&builtins->content);
631 stage->content.visit(*this);
636 void ProgramCompiler::VariableResolver::visit(Block &block)
638 blocks.push_back(&block);
639 block.variables.clear();
640 TraversingVisitor::visit(block);
644 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
648 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
651 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
652 if(j!=(*i)->variables.end())
654 var.declaration = j->second;
655 type = j->second->type_declaration;
662 if(assignment_target)
664 record_target = false;
665 assignment_target = 0;
668 assignment_target = var.declaration;
670 else if(var.declaration && var.declaration==assignment_target)
671 self_referencing = true;
674 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
677 TraversingVisitor::visit(memacc);
678 memacc.declaration = 0;
681 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
682 if(i!=type->members.variables.end())
684 memacc.declaration = i->second;
685 type = i->second->type_declaration;
692 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
697 SetForScope<bool> set(record_target, false);
698 binary.right->visit(*this);
701 binary.left->visit(*this);
705 TraversingVisitor::visit(binary);
710 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
713 SetFlag set(record_target);
714 assignment_target = 0;
715 assign.left->visit(*this);
718 self_referencing = false;
719 assign.right->visit(*this);
721 assign.self_referencing = (self_referencing || assign.oper!="=");
722 assign.target_declaration = assignment_target;
725 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
727 TraversingVisitor::visit(strct);
728 blocks.back()->types[strct.name] = &strct;
731 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
733 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
736 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
737 if(j!=(*i)->types.end())
738 var.type_declaration = j->second;
741 if(!block_interface.empty() && var.interface.empty())
742 var.interface = block_interface;
744 TraversingVisitor::visit(var);
745 blocks.back()->variables[var.name] = &var;
746 if(anonymous && blocks.size()>1)
747 blocks[blocks.size()-2]->variables[var.name] = &var;
750 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
752 SetFlag set(anonymous);
753 SetForScope<string> set2(block_interface, iface.interface);
754 TraversingVisitor::visit(iface);
758 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
760 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
761 if(i!=functions.end())
762 call.declaration = i->second.back();
764 TraversingVisitor::visit(call);
767 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
769 vector<FunctionDeclaration *> &decls = functions[func.name];
772 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
773 (*i)->definition = func.definition;
775 decls.push_back(&func);
777 else if(!decls.empty() && decls.back()->definition)
778 func.definition = decls.back()->definition;
780 decls.push_back(&func);
782 TraversingVisitor::visit(func);
786 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
790 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
794 else if(type==GEOMETRY)
800 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
802 SetForScope<Stage *> set(stage, &s);
804 in_prefix = get_out_prefix(stage->previous->type);
805 out_prefix = get_out_prefix(stage->type);
806 stage->content.visit(*this);
809 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
811 SetForScope<unsigned> set(scope_level, scope_level+1);
812 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
818 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
820 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
823 iface_declarations.clear();
826 apply_and_increment(block, i);
830 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
832 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
833 return prefix+name.substr(offset);
836 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
838 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
839 if(stage_vars.count(name) || iface_declarations.count(name))
842 VariableDeclaration* iface_var = new VariableDeclaration;
843 iface_var->sampling = var.sampling;
844 iface_var->interface = iface;
845 iface_var->type = var.type;
846 iface_var->type_declaration = var.type_declaration;
847 iface_var->name = name;
848 if(stage->type==GEOMETRY)
849 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
851 iface_var->array = var.array;
853 iface_var->array_size = var.array_size;
855 iface_var->linked_declaration = &var;
856 iface_declarations[name] = iface_var;
861 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
863 Assignment *assign = new Assignment;
864 VariableReference *ref = new VariableReference;
868 assign->right = right;
870 ExpressionStatement *stmt = new ExpressionStatement;
871 stmt->expression = assign;
873 insert_nodes.push_back(stmt);
876 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
878 if(var.declaration || !stage->previous)
880 if(iface_declarations.count(var.name))
883 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
884 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
885 if(i==prev_out.end())
886 i = prev_out.find(in_prefix+var.name);
887 if(i!=prev_out.end())
889 generate_interface(*i->second, "in", i->second->name);
890 var.name = i->second->name;
894 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
896 if(var.interface=="out")
899 stage->out_variables[var.name] = &var;
900 else if(generate_interface(var, "out", change_prefix(var.name, string())))
903 if(var.init_expression)
905 insert_assignment(var.name, var.init_expression->clone());
910 else if(var.interface=="in")
912 stage->in_variables[var.name] = &var;
913 if(var.linked_declaration)
914 var.linked_declaration->linked_declaration = &var;
915 else if(stage->previous)
917 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
918 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
919 if(i!=prev_out.end())
921 var.linked_declaration = i->second;
922 i->second->linked_declaration = &var;
927 TraversingVisitor::visit(var);
930 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
932 vector<VariableDeclaration *> pass_vars;
934 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
935 pass_vars.push_back(i->second);
936 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
937 if(i->second->interface=="in")
938 pass_vars.push_back(i->second.get());
942 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
943 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
946 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
947 linked = ((*j)->linked_declaration==i->second);
949 if(!linked && generate_interface(*i->second, "in", i->second->name))
950 pass_vars.push_back(i->second);
954 if(stage->type==GEOMETRY)
956 VariableReference *ref = new VariableReference;
959 BinaryExpression *subscript = new BinaryExpression;
960 subscript->left = ref;
961 subscript->oper = "[";
962 subscript->right = pass.subscript;
963 subscript->after = "]";
965 MemberAccess *memacc = new MemberAccess;
966 memacc->left = subscript;
967 memacc->member = "gl_Position";
969 insert_assignment("gl_Position", memacc);
972 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
974 string out_name = change_prefix((*i)->name, out_prefix);
975 generate_interface(**i, "out", out_name);
977 VariableReference *ref = new VariableReference;
978 ref->name = (*i)->name;
981 BinaryExpression *subscript = new BinaryExpression;
982 subscript->left = ref;
983 subscript->oper = "[";
984 subscript->right = pass.subscript;
985 subscript->after = "]";
986 insert_assignment(out_name, subscript);
989 insert_assignment(out_name, ref);
996 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
1001 void ProgramCompiler::DeclarationReorderer::visit(FunctionCall &call)
1003 FunctionDeclaration *def = call.declaration;
1005 def = def->definition;
1006 if(def && !ordered_funcs.count(def))
1007 needed_funcs.insert(def);
1010 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
1012 SetForScope<unsigned> set(scope_level, scope_level+1);
1014 return Visitor::visit(block);
1016 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
1017 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
1018 list<RefPtr<Node> >::iterator function_insert_point = block.body.end();
1019 unsigned unordered_func_count = 0;
1020 bool ordered_any_funcs = false;
1022 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1024 kind = NO_DECLARATION;
1028 if(kind==STRUCT && struct_insert_point!=block.body.end())
1030 block.body.insert(struct_insert_point, *i);
1033 else if(kind>STRUCT && struct_insert_point==block.body.end())
1034 struct_insert_point = i;
1036 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1038 block.body.insert(variable_insert_point, *i);
1041 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1042 variable_insert_point = i;
1046 if(function_insert_point==block.body.end())
1047 function_insert_point = i;
1049 if(needed_funcs.empty())
1051 ordered_funcs.insert(i->get());
1052 if(i!=function_insert_point)
1054 block.body.insert(function_insert_point, *i);
1058 ++function_insert_point;
1059 ordered_any_funcs = true;
1062 ++unordered_func_count;
1067 if(function_insert_point==i)
1068 ++function_insert_point;
1069 block.body.erase(i++);
1074 if(i==block.body.end() && unordered_func_count)
1076 if(!ordered_any_funcs)
1077 // A subset of the remaining functions forms a recursive loop
1078 /* TODO pick a function and move it up, adding any necessary
1082 i = function_insert_point;
1083 unordered_func_count = 0;
1088 void ProgramCompiler::DeclarationReorderer::visit(ProgramSyntax::VariableDeclaration &var)
1090 Visitor::visit(var);
1094 void ProgramCompiler::DeclarationReorderer::visit(FunctionDeclaration &func)
1096 needed_funcs.clear();
1097 func.body.visit(*this);
1098 needed_funcs.erase(&func);
1103 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1107 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1109 FunctionDeclaration *def = call.declaration;
1110 if(def && def->definition!=def)
1111 def = def->definition;
1115 unsigned &count = refcounts[def];
1117 if(count>1 || def==in_function)
1118 inlineable.erase(def);
1121 TraversingVisitor::visit(call);
1124 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1126 unsigned &count = refcounts[func.definition];
1127 if(!count && func.parameters.empty())
1128 inlineable.insert(func.definition);
1130 SetForScope<FunctionDeclaration *> set(in_function, &func);
1131 TraversingVisitor::visit(func);
1135 ProgramCompiler::FunctionInliner::FunctionInliner():
1139 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1144 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1149 ptr = inline_result;
1152 void ProgramCompiler::FunctionInliner::visit(Block &block)
1157 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1165 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1167 visit_and_inline(unary.expression);
1171 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1173 visit_and_inline(binary.left);
1174 visit_and_inline(binary.right);
1178 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1180 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1181 visit_and_inline(*i);
1183 FunctionDeclaration *def = call.declaration;
1184 if(def && def->definition!=def)
1185 def = def->definition;
1187 if(def && inlineable.count(def))
1196 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1198 TraversingVisitor::visit(ret);
1201 inline_result = ret.expression->clone();
1205 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1212 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap *v, bool c):
1219 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1221 if(literal.token=="true")
1223 else if(literal.token=="false")
1226 result = lexical_cast<float>(literal.token);
1227 result_valid = true;
1230 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1232 parexp.expression->visit(*this);
1235 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1237 if(!var.declaration)
1239 if(const_only && !var.declaration->constant)
1244 ValueMap::const_iterator i = variable_values->find(var.declaration);
1245 if(i!=variable_values->end())
1246 i->second->visit(*this);
1248 else if(var.declaration->init_expression)
1249 var.declaration->init_expression->visit(*this);
1252 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1254 result_valid = false;
1255 unary.expression->visit(*this);
1262 result_valid = false;
1265 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1267 result_valid = false;
1268 binary.left->visit(*this);
1272 float left_result = result;
1273 result_valid = false;
1274 binary.right->visit(*this);
1278 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);
1284 else if(binary.oper==">=")
1285 result = (left_result>=result);
1286 else if(binary.oper=="==")
1287 result = (left_result==result);
1288 else if(binary.oper=="!=")
1289 result = (left_result!=result);
1290 else if(binary.oper=="&&")
1291 result = (left_result && result);
1292 else if(binary.oper=="||")
1293 result = (left_result || result);
1295 result_valid = false;
1299 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1304 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1306 SetForScope<unsigned> set(scope_level, scope_level+1);
1307 BlockModifier::visit(block);
1309 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1310 variable_values.erase(i->second);
1313 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1315 variable_values.erase(assign.target_declaration);
1318 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1320 if(var.constant || scope_level>1)
1321 variable_values[&var] = var.init_expression.get();
1324 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1326 ExpressionEvaluator eval(&variable_values, in_loop);
1327 cond.condition->visit(eval);
1328 if(eval.result_valid)
1329 flatten_block(eval.result ? cond.body : cond.else_body);
1331 TraversingVisitor::visit(cond);
1334 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1336 // XXX Should this not visit init_statement first?
1339 ExpressionEvaluator eval(0, in_loop);
1340 iter.condition->visit(eval);
1341 if(eval.result_valid && !eval.result)
1348 SetFlag set_loop(in_loop);
1349 TraversingVisitor::visit(iter);
1353 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1356 assignment_target(false),
1360 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1362 variables.push_back(BlockVariableMap());
1364 BlockVariableMap &global_variables = variables.back();
1365 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1367 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1369 if(!i->second.referenced)
1371 unused_nodes.insert(i->first);
1372 clear_assignments(i->second, true);
1375 variables.pop_back();
1378 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1380 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1381 if(i!=aggregates.end())
1382 unused_nodes.erase(i->second);
1384 if(var.declaration && !assignment_target)
1386 VariableInfo &var_info = variables.back()[var.declaration];
1387 var_info.assignments.clear();
1388 var_info.referenced = true;
1392 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1394 TraversingVisitor::visit(memacc);
1395 unused_nodes.erase(memacc.declaration);
1398 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1400 if(binary.oper=="[")
1402 binary.left->visit(*this);
1403 SetForScope<bool> set(assignment_target, false);
1404 binary.right->visit(*this);
1407 TraversingVisitor::visit(binary);
1410 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1413 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1414 assign.left->visit(*this);
1416 assign.right->visit(*this);
1417 assignment = &assign;
1420 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1422 VariableInfo &var_info = variables.back()[&var];
1424 clear_assignments(var_info, true);
1425 var_info.assignments.push_back(&node);
1426 var_info.conditionally_assigned = false;
1429 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1433 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1434 unused_nodes.insert(*i);
1436 var_info.assignments.clear();
1439 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1442 TraversingVisitor::visit(expr);
1443 if(assignment && assignment->target_declaration)
1444 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1447 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1449 SetForScope<Node *> set(aggregate, &strct);
1450 unused_nodes.insert(&strct);
1451 TraversingVisitor::visit(strct);
1454 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1457 aggregates[&var] = aggregate;
1460 variables.back()[&var].local = true;
1461 if(var.init_expression)
1462 record_assignment(var, *var.init_expression, false);
1464 unused_nodes.erase(var.type_declaration);
1465 TraversingVisitor::visit(var);
1468 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1470 SetForScope<Node *> set(aggregate, &iface);
1471 unused_nodes.insert(&iface);
1472 TraversingVisitor::visit(iface);
1475 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1477 variables.push_back(BlockVariableMap());
1480 SetForScope<bool> set(global_scope, false);
1481 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1483 func.body.visit(*this);
1486 BlockVariableMap &block_variables = variables.back();
1487 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1488 i->second.conditionally_assigned = true;
1489 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1490 block_variables[i->get()].referenced = true;
1491 merge_down_variables();
1494 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1496 BlockVariableMap &parent_variables = variables[variables.size()-2];
1497 BlockVariableMap &block_variables = variables.back();
1498 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1502 if(!i->second.referenced)
1503 unused_nodes.insert(i->first);
1504 clear_assignments(i->second, true);
1508 BlockVariableMap::iterator j = parent_variables.find(i->first);
1509 if(j==parent_variables.end())
1510 parent_variables.insert(*i);
1513 if(i->second.referenced || !i->second.conditionally_assigned)
1514 clear_assignments(j->second, !i->second.referenced);
1515 j->second.conditionally_assigned = i->second.conditionally_assigned;
1516 j->second.referenced |= i->second.referenced;
1517 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1520 variables.pop_back();
1523 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1525 cond.condition->visit(*this);
1526 variables.push_back(BlockVariableMap());
1527 cond.body.visit(*this);
1529 BlockVariableMap if_variables;
1530 swap(variables.back(), if_variables);
1531 cond.else_body.visit(*this);
1533 BlockVariableMap &else_variables = variables.back();
1534 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1536 BlockVariableMap::iterator j = if_variables.find(i->first);
1537 if(j!=if_variables.end())
1539 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1540 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1541 if_variables.erase(j);
1544 i->second.conditionally_assigned = true;
1547 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1549 i->second.conditionally_assigned = true;
1550 else_variables.insert(*i);
1553 merge_down_variables();
1556 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1558 variables.push_back(BlockVariableMap());
1559 TraversingVisitor::visit(iter);
1561 BlockVariableMap &block_variables = variables.back();
1562 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1563 if(!i->second.local && i->second.referenced)
1564 i->second.assignments.clear();
1566 merge_down_variables();
1570 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1572 conditionally_assigned(false),
1577 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1579 TraversingVisitor::visit(call);
1581 unused_nodes.erase(call.declaration);
1582 if(call.declaration && call.declaration->definition!=call.declaration)
1583 used_definitions.insert(call.declaration->definition);
1586 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1588 TraversingVisitor::visit(func);
1590 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1591 unused_nodes.insert(&func);
1595 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1599 void ProgramCompiler::NodeRemover::visit(Block &block)
1601 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1604 if(to_remove.count(i->get()))
1605 block.body.erase(i++);
1611 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1613 if(to_remove.count(&var))
1615 stage->in_variables.erase(var.name);
1616 stage->out_variables.erase(var.name);
1617 stage->locations.erase(var.name);
1618 if(var.linked_declaration)
1619 var.linked_declaration->linked_declaration = 0;
1621 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1622 var.init_expression = 0;
1626 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1631 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1633 var.precision.clear();
1637 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1641 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1645 SetForScope<bool> set(toplevel, false);
1646 BlockModifier::visit(block);
1649 Visitor::visit(block);
1652 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1654 have_default.insert(prec.type);
1657 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1659 if(var.type_declaration)
1662 string type = var.type;
1663 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1665 else if(!type.compare(0, 3, "ivec") || type=="uint")
1668 if(!have_default.count(type))
1670 Precision *prec = new Precision;
1671 if(!type.compare(0, 7, "sampler"))
1672 prec->precision = "lowp";
1673 else if(stage->type==FRAGMENT)
1674 prec->precision = "mediump";
1676 prec->precision = "highp";
1678 insert_nodes.push_back(prec);
1680 have_default.insert(type);
1685 ProgramCompiler::LegacyConverter::LegacyConverter():
1686 target_api(get_gl_api()),
1687 target_version(get_glsl_version()),
1691 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1692 target_api(get_gl_api()),
1697 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1699 if(target_version<feature_version)
1701 else if(stage->required_version<feature_version)
1702 stage->required_version = feature_version;
1707 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1709 if(target_api==OPENGL_ES2)
1710 return check_version(Version(3, 0));
1712 return check_version(Version(1, 30));
1715 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1717 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1719 var.name = "gl_FragColor";
1720 var.declaration = 0;
1723 else if(var.declaration)
1724 type = var.declaration->type;
1729 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1731 TraversingVisitor::visit(assign);
1732 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1733 assign.target_declaration = 0;
1736 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1738 if(target_api==OPENGL_ES2)
1739 return check_version(Version(3, 0));
1741 return check_version(Version(1, 30));
1744 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1746 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1748 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1749 if(i!=call.arguments.end())
1752 if(type=="sampler1D")
1753 call.name = "texture1D";
1754 else if(type=="sampler2D")
1755 call.name = "texture2D";
1756 else if(type=="sampler3D")
1757 call.name = "texture3D";
1758 else if(type=="sampler1DShadow")
1759 call.name = "shadow1D";
1760 else if(type=="sampler2DShadow")
1761 call.name = "shadow2D";
1763 for(; i!=call.arguments.end(); ++i)
1768 TraversingVisitor::visit(call);
1771 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1773 if(target_api==OPENGL_ES2)
1774 return check_version(Version(3, 0));
1776 return check_version(Version(3, 30));
1779 bool ProgramCompiler::LegacyConverter::supports_centroid_sampling() const
1781 if(target_api==OPENGL_ES2)
1782 return check_version(Version(3, 0));
1784 return check_version(Version(1, 20));
1787 bool ProgramCompiler::LegacyConverter::supports_sample_sampling() const
1789 if(target_api==OPENGL_ES2)
1790 return check_version(Version(3, 20));
1792 return check_version(Version(4, 0));
1795 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1797 if(var.layout && !supports_interface_layouts())
1799 vector<Layout::Qualifier>::iterator i;
1800 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1801 if(i!=var.layout->qualifiers.end())
1803 unsigned location = lexical_cast<unsigned>(i->value);
1804 if(stage->type==VERTEX && var.interface=="in")
1806 stage->locations[var.name] = location;
1807 var.layout->qualifiers.erase(i);
1809 else if(stage->type==FRAGMENT && var.interface=="out")
1812 static Require _req(EXT_gpu_shader4);
1813 stage->locations[var.name] = location;
1814 var.layout->qualifiers.erase(i);
1817 if(var.layout->qualifiers.empty())
1822 if(var.sampling=="centroid")
1824 if(!supports_centroid_sampling())
1825 var.sampling = string();
1827 else if(var.sampling=="sample")
1829 if(!supports_sample_sampling())
1830 var.sampling = string();
1833 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1835 if(stage->type==FRAGMENT && var.interface=="out")
1842 TraversingVisitor::visit(var);
1845 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1847 if(target_api==OPENGL_ES2)
1849 if(iface=="uniform")
1850 return check_version(Version(3, 0));
1852 return check_version(Version(3, 20));
1855 return check_version(Version(1, 50));
1858 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1860 if(!supports_interface_blocks(iface.interface))
1861 flatten_block(iface.members);