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 ProgramCompiler::ProgramCompiler():
43 ProgramCompiler::~ProgramCompiler()
48 void ProgramCompiler::compile(const string &source, const string &src_name)
52 module = new Module();
54 imported_names.insert(src_name);
55 append_module(parser.parse(source, src_name));
59 void ProgramCompiler::compile(IO::Base &io, Resources *res, const string &src_name)
63 module = new Module();
65 imported_names.insert(src_name);
66 append_module(parser.parse(io, src_name));
70 void ProgramCompiler::compile(IO::Base &io, const string &src_name)
72 compile(io, 0, src_name);
75 void ProgramCompiler::add_shaders(Program &program)
78 throw invalid_operation("ProgramCompiler::add_shaders");
80 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
84 program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
85 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
86 program.bind_attribute(j->second, j->first);
88 else if(i->type==GEOMETRY)
89 program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
90 else if(i->type==FRAGMENT)
92 program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
95 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
96 program.bind_fragment_data(j->second, j->first);
102 Module *ProgramCompiler::create_builtins_module()
104 ProgramParser parser;
105 Module *module = new Module(parser.parse(builtins_src, "<builtin>"));
106 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
108 VariableResolver resolver;
109 i->content.visit(resolver);
110 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
111 j->second->linked_declaration = j->second;
116 Module &ProgramCompiler::get_builtins_module()
118 static RefPtr<Module> builtins_module = create_builtins_module();
119 return *builtins_module;
122 Stage *ProgramCompiler::get_builtins(StageType type)
124 Module &module = get_builtins_module();
125 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
131 void ProgramCompiler::append_module(ProgramSyntax::Module &mod)
133 vector<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
134 for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
135 import((*i)->module);
136 apply<NodeRemover>(mod.shared, set<Node *>(imports.begin(), imports.end()));
138 append_stage(mod.shared);
139 for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
143 void ProgramCompiler::append_stage(Stage &stage)
146 if(stage.type==SHARED)
147 target = &module->shared;
150 list<Stage>::iterator i;
151 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
152 if(i==module->stages.end() || i->type>stage.type)
154 list<Stage>::iterator j = module->stages.insert(i, stage.type);
155 if(i!=module->stages.end())
158 if(i!=module->stages.begin())
165 for(NodeList<Node>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
166 target->content.body.push_back(*i);
167 apply<DeclarationCombiner>(*target);
170 void ProgramCompiler::process()
172 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
174 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
177 i = module->stages.begin();
181 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
185 void ProgramCompiler::import(const string &name)
187 string fn = name+".glsl";
188 if(imported_names.count(fn))
190 imported_names.insert(fn);
192 RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
194 throw runtime_error(format("module %s not found", name));
195 ProgramParser import_parser;
196 append_module(import_parser.parse(*io, fn));
199 void ProgramCompiler::generate(Stage &stage)
201 inject_block(stage.content, module->shared.content);
203 apply<DeclarationReorderer>(stage);
204 apply<FunctionResolver>(stage);
205 apply<VariableResolver>(stage);
206 apply<InterfaceGenerator>(stage);
207 apply<VariableResolver>(stage);
208 apply<DeclarationReorderer>(stage);
209 apply<FunctionResolver>(stage);
210 apply<LegacyConverter>(stage);
213 bool ProgramCompiler::optimize(Stage &stage)
215 apply<ConstantConditionEliminator>(stage);
217 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
218 apply<FunctionInliner>(stage, inlineable);
220 set<Node *> unused = apply<UnusedVariableLocator>(stage);
221 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
222 unused.insert(unused2.begin(), unused2.end());
223 apply<NodeRemover>(stage, unused);
225 return !unused.empty();
228 void ProgramCompiler::finalize(Stage &stage)
230 if(get_gl_api()==OPENGL_ES2)
231 apply<DefaultPrecisionGenerator>(stage);
233 apply<PrecisionRemover>(stage);
236 void ProgramCompiler::inject_block(Block &target, const Block &source)
238 list<RefPtr<Node> >::iterator insert_point = target.body.begin();
239 for(list<RefPtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
240 target.body.insert(insert_point, (*i)->clone());
244 typename T::ResultType ProgramCompiler::apply(Stage &stage)
247 visitor.apply(stage);
248 return visitor.get_result();
251 template<typename T, typename A>
252 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
255 visitor.apply(stage);
256 return visitor.get_result();
260 ProgramCompiler::Visitor::Visitor():
264 void ProgramCompiler::Visitor::apply(Stage &s)
266 SetForScope<Stage *> set(stage, &s);
267 stage->content.visit(*this);
271 ProgramCompiler::BlockModifier::BlockModifier():
275 void ProgramCompiler::BlockModifier::flatten_block(Block &block)
277 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
281 void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
283 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
284 insert_nodes.clear();
287 block.body.erase(i++);
293 void ProgramCompiler::BlockModifier::visit(Block &block)
295 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
298 apply_and_increment(block, i);
303 ProgramCompiler::Formatter::Formatter():
305 parameter_list(false),
309 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
311 GLApi api = get_gl_api();
312 const Version &ver = s.required_version;
316 formatted += format("#version %d%02d", ver.major, ver.minor);
317 if(api==OPENGL_ES2 && ver>=Version(3, 0))
325 void ProgramCompiler::Formatter::visit(Literal &literal)
327 formatted += literal.token;
330 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
333 parexpr.expression->visit(*this);
337 void ProgramCompiler::Formatter::visit(VariableReference &var)
339 formatted += var.name;
342 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
344 memacc.left->visit(*this);
345 formatted += format(".%s", memacc.member);
348 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
351 formatted += unary.oper;
352 unary.expression->visit(*this);
354 formatted += unary.oper;
357 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
359 binary.left->visit(*this);
360 formatted += binary.oper;
361 binary.right->visit(*this);
362 formatted += binary.after;
365 void ProgramCompiler::Formatter::visit(Assignment &assign)
367 assign.left->visit(*this);
368 formatted += format(" %s ", assign.oper);
369 assign.right->visit(*this);
372 void ProgramCompiler::Formatter::visit(FunctionCall &call)
374 formatted += format("%s(", call.name);
375 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
377 if(i!=call.arguments.begin())
384 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
386 expr.expression->visit(*this);
390 void ProgramCompiler::Formatter::visit(Block &block)
395 unsigned brace_indent = indent;
396 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
398 formatted += format("%s{\n", string(brace_indent*2, ' '));
400 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
401 string spaces(indent*2, ' ');
402 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
404 if(i!=block.body.begin())
412 formatted += format("\n%s}", string(brace_indent*2, ' '));
415 void ProgramCompiler::Formatter::visit(Import &import)
417 formatted += format("import %s;", import.module);
420 void ProgramCompiler::Formatter::visit(Precision &prec)
422 formatted += format("precision %s %s;", prec.precision, prec.type);
425 void ProgramCompiler::Formatter::visit(Layout &layout)
427 formatted += "layout(";
428 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
430 if(i!=layout.qualifiers.begin())
432 formatted += i->identifier;
433 if(!i->value.empty())
434 formatted += format("=%s", i->value);
439 void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
441 layout.layout.visit(*this);
442 formatted += format(" %s;", layout.interface);
445 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
447 formatted += format("struct %s\n", strct.name);
448 strct.members.visit(*this);
452 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
456 var.layout->visit(*this);
460 formatted += "const ";
461 if(!var.interpolation.empty())
462 formatted += format("%s ", var.interpolation);
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 if(iter.init_statement)
548 iter.init_statement->visit(*this);
554 iter.condition->visit(*this);
557 if(iter.loop_expression)
560 iter.loop_expression->visit(*this);
563 iter.body.visit(*this);
566 void ProgramCompiler::Formatter::visit(Return &ret)
568 formatted += "return";
572 ret.expression->visit(*this);
577 void ProgramCompiler::Formatter::visit(Jump &jump)
579 formatted += jump.keyword;
584 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
588 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
593 SetForScope<bool> set(toplevel, false);
594 BlockModifier::visit(block);
597 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
599 vector<FunctionDeclaration *> &decls = functions[func.name];
602 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
604 (*i)->definition = func.definition;
605 (*i)->body.body.clear();
608 decls.push_back(&func);
611 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
613 VariableDeclaration *&ptr = variables[var.name];
616 ptr->type = var.type;
617 if(var.init_expression)
618 ptr->init_expression = var.init_expression;
626 ProgramCompiler::VariableResolver::VariableResolver():
628 record_target(false),
629 assignment_target(0),
630 self_referencing(false)
633 void ProgramCompiler::VariableResolver::apply(Stage &s)
635 SetForScope<Stage *> set(stage, &s);
636 Stage *builtins = get_builtins(stage->type);
638 blocks.push_back(&builtins->content);
639 stage->content.visit(*this);
644 void ProgramCompiler::VariableResolver::visit(Block &block)
646 blocks.push_back(&block);
647 block.variables.clear();
648 TraversingVisitor::visit(block);
652 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
656 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
659 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
660 if(j!=(*i)->variables.end())
662 var.declaration = j->second;
663 type = j->second->type_declaration;
670 if(assignment_target)
672 record_target = false;
673 assignment_target = 0;
676 assignment_target = var.declaration;
678 else if(var.declaration && var.declaration==assignment_target)
679 self_referencing = true;
682 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
685 TraversingVisitor::visit(memacc);
686 memacc.declaration = 0;
689 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
690 if(i!=type->members.variables.end())
692 memacc.declaration = i->second;
693 type = i->second->type_declaration;
700 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
705 SetForScope<bool> set(record_target, false);
706 binary.right->visit(*this);
709 binary.left->visit(*this);
713 TraversingVisitor::visit(binary);
718 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
721 SetFlag set(record_target);
722 assignment_target = 0;
723 assign.left->visit(*this);
726 self_referencing = false;
727 assign.right->visit(*this);
729 assign.self_referencing = (self_referencing || assign.oper!="=");
730 assign.target_declaration = assignment_target;
733 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
735 TraversingVisitor::visit(strct);
736 blocks.back()->types[strct.name] = &strct;
739 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
741 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
744 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
745 if(j!=(*i)->types.end())
746 var.type_declaration = j->second;
749 if(!block_interface.empty() && var.interface.empty())
750 var.interface = block_interface;
752 TraversingVisitor::visit(var);
753 blocks.back()->variables[var.name] = &var;
754 if(anonymous && blocks.size()>1)
755 blocks[blocks.size()-2]->variables[var.name] = &var;
758 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
760 SetFlag set(anonymous);
761 SetForScope<string> set2(block_interface, iface.interface);
762 TraversingVisitor::visit(iface);
766 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
768 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
769 if(i!=functions.end())
770 call.declaration = i->second.back();
772 TraversingVisitor::visit(call);
775 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
777 vector<FunctionDeclaration *> &decls = functions[func.name];
780 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
781 (*i)->definition = func.definition;
783 decls.push_back(&func);
785 else if(!decls.empty() && decls.back()->definition)
786 func.definition = decls.back()->definition;
788 decls.push_back(&func);
790 TraversingVisitor::visit(func);
794 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
798 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
802 else if(type==GEOMETRY)
808 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
810 SetForScope<Stage *> set(stage, &s);
812 in_prefix = get_out_prefix(stage->previous->type);
813 out_prefix = get_out_prefix(stage->type);
814 stage->content.visit(*this);
817 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
819 SetForScope<unsigned> set(scope_level, scope_level+1);
820 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
826 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
828 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
831 iface_declarations.clear();
834 apply_and_increment(block, i);
838 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
840 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
841 return prefix+name.substr(offset);
844 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
846 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
847 if(stage_vars.count(name) || iface_declarations.count(name))
850 VariableDeclaration* iface_var = new VariableDeclaration;
851 iface_var->sampling = var.sampling;
852 iface_var->interface = iface;
853 iface_var->type = var.type;
854 iface_var->type_declaration = var.type_declaration;
855 iface_var->name = name;
856 if(stage->type==GEOMETRY)
857 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
859 iface_var->array = var.array;
861 iface_var->array_size = var.array_size;
863 iface_var->linked_declaration = &var;
864 iface_declarations[name] = iface_var;
869 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
871 Assignment *assign = new Assignment;
872 VariableReference *ref = new VariableReference;
876 assign->right = right;
878 ExpressionStatement *stmt = new ExpressionStatement;
879 stmt->expression = assign;
881 insert_nodes.push_back(stmt);
884 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
886 if(var.declaration || !stage->previous)
888 if(iface_declarations.count(var.name))
891 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
892 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
893 if(i==prev_out.end())
894 i = prev_out.find(in_prefix+var.name);
895 if(i!=prev_out.end())
897 generate_interface(*i->second, "in", i->second->name);
898 var.name = i->second->name;
902 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
904 if(var.interface=="out")
907 stage->out_variables[var.name] = &var;
908 else if(generate_interface(var, "out", change_prefix(var.name, string())))
911 if(var.init_expression)
913 insert_assignment(var.name, var.init_expression->clone());
918 else if(var.interface=="in")
920 stage->in_variables[var.name] = &var;
921 if(var.linked_declaration)
922 var.linked_declaration->linked_declaration = &var;
923 else if(stage->previous)
925 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
926 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
927 if(i!=prev_out.end())
929 var.linked_declaration = i->second;
930 i->second->linked_declaration = &var;
935 TraversingVisitor::visit(var);
938 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
940 vector<VariableDeclaration *> pass_vars;
942 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
943 pass_vars.push_back(i->second);
944 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
945 if(i->second->interface=="in")
946 pass_vars.push_back(i->second.get());
950 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
951 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
954 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
955 linked = ((*j)->linked_declaration==i->second);
957 if(!linked && generate_interface(*i->second, "in", i->second->name))
958 pass_vars.push_back(i->second);
962 if(stage->type==GEOMETRY)
964 VariableReference *ref = new VariableReference;
967 BinaryExpression *subscript = new BinaryExpression;
968 subscript->left = ref;
969 subscript->oper = "[";
970 subscript->right = pass.subscript;
971 subscript->after = "]";
973 MemberAccess *memacc = new MemberAccess;
974 memacc->left = subscript;
975 memacc->member = "gl_Position";
977 insert_assignment("gl_Position", memacc);
980 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
982 string out_name = change_prefix((*i)->name, out_prefix);
983 generate_interface(**i, "out", out_name);
985 VariableReference *ref = new VariableReference;
986 ref->name = (*i)->name;
989 BinaryExpression *subscript = new BinaryExpression;
990 subscript->left = ref;
991 subscript->oper = "[";
992 subscript->right = pass.subscript;
993 subscript->after = "]";
994 insert_assignment(out_name, subscript);
997 insert_assignment(out_name, ref);
1004 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
1006 kind(NO_DECLARATION)
1009 void ProgramCompiler::DeclarationReorderer::visit(FunctionCall &call)
1011 FunctionDeclaration *def = call.declaration;
1013 def = def->definition;
1014 if(def && !ordered_funcs.count(def))
1015 needed_funcs.insert(def);
1018 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
1020 SetForScope<unsigned> set(scope_level, scope_level+1);
1022 return Visitor::visit(block);
1024 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
1025 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
1026 list<RefPtr<Node> >::iterator function_insert_point = block.body.end();
1027 unsigned unordered_func_count = 0;
1028 bool ordered_any_funcs = false;
1030 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1032 kind = NO_DECLARATION;
1036 if(kind==STRUCT && struct_insert_point!=block.body.end())
1038 block.body.insert(struct_insert_point, *i);
1041 else if(kind>STRUCT && struct_insert_point==block.body.end())
1042 struct_insert_point = i;
1044 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1046 block.body.insert(variable_insert_point, *i);
1049 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1050 variable_insert_point = i;
1054 if(function_insert_point==block.body.end())
1055 function_insert_point = i;
1057 if(needed_funcs.empty())
1059 ordered_funcs.insert(i->get());
1060 if(i!=function_insert_point)
1062 block.body.insert(function_insert_point, *i);
1066 ++function_insert_point;
1067 ordered_any_funcs = true;
1070 ++unordered_func_count;
1075 if(function_insert_point==i)
1076 ++function_insert_point;
1077 block.body.erase(i++);
1082 if(i==block.body.end() && unordered_func_count)
1084 if(!ordered_any_funcs)
1085 // A subset of the remaining functions forms a recursive loop
1086 /* TODO pick a function and move it up, adding any necessary
1090 i = function_insert_point;
1091 unordered_func_count = 0;
1096 void ProgramCompiler::DeclarationReorderer::visit(ProgramSyntax::VariableDeclaration &var)
1098 Visitor::visit(var);
1102 void ProgramCompiler::DeclarationReorderer::visit(FunctionDeclaration &func)
1104 needed_funcs.clear();
1105 func.body.visit(*this);
1106 needed_funcs.erase(&func);
1111 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1115 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1117 FunctionDeclaration *def = call.declaration;
1118 if(def && def->definition!=def)
1119 def = def->definition;
1123 unsigned &count = refcounts[def];
1125 if(count>1 || def==in_function)
1126 inlineable.erase(def);
1129 TraversingVisitor::visit(call);
1132 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1134 unsigned &count = refcounts[func.definition];
1135 if(!count && func.parameters.empty())
1136 inlineable.insert(func.definition);
1138 SetForScope<FunctionDeclaration *> set(in_function, &func);
1139 TraversingVisitor::visit(func);
1143 ProgramCompiler::FunctionInliner::FunctionInliner():
1147 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1152 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1157 ptr = inline_result;
1160 void ProgramCompiler::FunctionInliner::visit(Block &block)
1165 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1173 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1175 visit_and_inline(unary.expression);
1179 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1181 visit_and_inline(binary.left);
1182 visit_and_inline(binary.right);
1186 void ProgramCompiler::FunctionInliner::visit(MemberAccess &memacc)
1188 visit_and_inline(memacc.left);
1192 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1194 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1195 visit_and_inline(*i);
1197 FunctionDeclaration *def = call.declaration;
1198 if(def && def->definition!=def)
1199 def = def->definition;
1201 if(def && inlineable.count(def))
1210 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1212 TraversingVisitor::visit(ret);
1215 inline_result = ret.expression->clone();
1219 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1225 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1226 variable_values(&v),
1231 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1233 if(literal.token=="true")
1235 else if(literal.token=="false")
1238 result = lexical_cast<float>(literal.token);
1239 result_valid = true;
1242 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1244 parexp.expression->visit(*this);
1247 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1249 if(!var.declaration)
1254 ValueMap::const_iterator i = variable_values->find(var.declaration);
1255 if(i!=variable_values->end())
1256 i->second->visit(*this);
1258 else if(var.declaration->init_expression)
1259 var.declaration->init_expression->visit(*this);
1262 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1264 result_valid = false;
1265 unary.expression->visit(*this);
1272 result_valid = false;
1275 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1277 result_valid = false;
1278 binary.left->visit(*this);
1282 float left_result = result;
1283 result_valid = false;
1284 binary.right->visit(*this);
1288 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);
1294 else if(binary.oper==">=")
1295 result = (left_result>=result);
1296 else if(binary.oper=="==")
1297 result = (left_result==result);
1298 else if(binary.oper=="!=")
1299 result = (left_result!=result);
1300 else if(binary.oper=="&&")
1301 result = (left_result && result);
1302 else if(binary.oper=="||")
1303 result = (left_result || result);
1305 result_valid = false;
1309 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1314 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1316 SetForScope<unsigned> set(scope_level, scope_level+1);
1317 BlockModifier::visit(block);
1319 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1320 variable_values.erase(i->second);
1323 void ProgramCompiler::ConstantConditionEliminator::visit(UnaryExpression &unary)
1325 if(VariableReference *var = dynamic_cast<VariableReference *>(unary.expression.get()))
1326 if(unary.oper=="++" || unary.oper=="--")
1327 variable_values.erase(var->declaration);
1330 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1332 variable_values.erase(assign.target_declaration);
1335 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1337 if(var.constant || scope_level>1)
1338 variable_values[&var] = var.init_expression.get();
1341 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1345 ExpressionEvaluator eval(variable_values);
1346 cond.condition->visit(eval);
1347 if(eval.result_valid)
1349 flatten_block(eval.result ? cond.body : cond.else_body);
1354 TraversingVisitor::visit(cond);
1357 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1363 /* If the loop condition is always false on the first iteration, the
1364 entire loop can be removed */
1365 if(iter.init_statement)
1366 iter.init_statement->visit(*this);
1367 ExpressionEvaluator eval(variable_values);
1368 iter.condition->visit(eval);
1369 if(eval.result_valid && !eval.result)
1376 /* Record all assignments that occur inside the loop body so those
1377 variables won't be considered as constant */
1378 SetFlag set_record(record_only);
1379 TraversingVisitor::visit(iter);
1382 TraversingVisitor::visit(iter);
1384 if(VariableDeclaration *init_decl = dynamic_cast<VariableDeclaration *>(iter.init_statement.get()))
1385 variable_values.erase(init_decl);
1389 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1392 assignment_target(false),
1396 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1398 variables.push_back(BlockVariableMap());
1400 BlockVariableMap &global_variables = variables.back();
1401 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1403 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1405 if(!i->second.referenced)
1407 unused_nodes.insert(i->first);
1408 clear_assignments(i->second, true);
1411 variables.pop_back();
1414 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1416 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1417 if(i!=aggregates.end())
1418 unused_nodes.erase(i->second);
1420 if(var.declaration && !assignment_target)
1422 VariableInfo &var_info = variables.back()[var.declaration];
1423 var_info.assignments.clear();
1424 var_info.referenced = true;
1428 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1430 TraversingVisitor::visit(memacc);
1431 unused_nodes.erase(memacc.declaration);
1434 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1436 if(binary.oper=="[")
1438 binary.left->visit(*this);
1439 SetForScope<bool> set(assignment_target, false);
1440 binary.right->visit(*this);
1443 TraversingVisitor::visit(binary);
1446 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1449 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1450 assign.left->visit(*this);
1452 assign.right->visit(*this);
1453 assignment = &assign;
1456 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1458 VariableInfo &var_info = variables.back()[&var];
1460 clear_assignments(var_info, true);
1461 var_info.assignments.push_back(&node);
1462 var_info.conditionally_assigned = false;
1465 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1469 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1470 unused_nodes.insert(*i);
1472 var_info.assignments.clear();
1475 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1478 TraversingVisitor::visit(expr);
1479 if(assignment && assignment->target_declaration)
1480 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1483 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1485 SetForScope<Node *> set(aggregate, &strct);
1486 unused_nodes.insert(&strct);
1487 TraversingVisitor::visit(strct);
1490 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1493 aggregates[&var] = aggregate;
1496 variables.back()[&var].local = true;
1497 if(var.init_expression)
1498 record_assignment(var, *var.init_expression, false);
1500 unused_nodes.erase(var.type_declaration);
1501 TraversingVisitor::visit(var);
1504 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1506 SetForScope<Node *> set(aggregate, &iface);
1507 unused_nodes.insert(&iface);
1508 TraversingVisitor::visit(iface);
1511 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1513 variables.push_back(BlockVariableMap());
1516 SetForScope<bool> set(global_scope, false);
1517 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1519 func.body.visit(*this);
1522 BlockVariableMap &block_variables = variables.back();
1523 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1524 i->second.conditionally_assigned = true;
1525 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1526 block_variables[i->get()].referenced = true;
1527 merge_down_variables();
1530 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1532 BlockVariableMap &parent_variables = variables[variables.size()-2];
1533 BlockVariableMap &block_variables = variables.back();
1534 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1538 if(!i->second.referenced)
1539 unused_nodes.insert(i->first);
1540 clear_assignments(i->second, true);
1544 BlockVariableMap::iterator j = parent_variables.find(i->first);
1545 if(j==parent_variables.end())
1546 parent_variables.insert(*i);
1549 if(i->second.referenced || !i->second.conditionally_assigned)
1550 clear_assignments(j->second, !i->second.referenced);
1551 j->second.conditionally_assigned = i->second.conditionally_assigned;
1552 j->second.referenced |= i->second.referenced;
1553 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1556 variables.pop_back();
1559 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1561 cond.condition->visit(*this);
1562 variables.push_back(BlockVariableMap());
1563 cond.body.visit(*this);
1565 BlockVariableMap if_variables;
1566 swap(variables.back(), if_variables);
1567 cond.else_body.visit(*this);
1569 BlockVariableMap &else_variables = variables.back();
1570 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1572 BlockVariableMap::iterator j = if_variables.find(i->first);
1573 if(j!=if_variables.end())
1575 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1576 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1577 if_variables.erase(j);
1580 i->second.conditionally_assigned = true;
1583 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1585 i->second.conditionally_assigned = true;
1586 else_variables.insert(*i);
1589 merge_down_variables();
1592 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1594 variables.push_back(BlockVariableMap());
1595 TraversingVisitor::visit(iter);
1597 BlockVariableMap &block_variables = variables.back();
1598 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1599 if(!i->second.local && i->second.referenced)
1600 i->second.assignments.clear();
1602 merge_down_variables();
1606 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1608 conditionally_assigned(false),
1613 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1615 TraversingVisitor::visit(call);
1617 unused_nodes.erase(call.declaration);
1618 if(call.declaration && call.declaration->definition!=call.declaration)
1619 used_definitions.insert(call.declaration->definition);
1622 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1624 TraversingVisitor::visit(func);
1626 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1627 unused_nodes.insert(&func);
1631 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1635 void ProgramCompiler::NodeRemover::visit(Block &block)
1637 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1640 if(to_remove.count(i->get()))
1641 block.body.erase(i++);
1647 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1649 if(to_remove.count(&var))
1651 stage->in_variables.erase(var.name);
1652 stage->out_variables.erase(var.name);
1653 stage->locations.erase(var.name);
1654 if(var.linked_declaration)
1655 var.linked_declaration->linked_declaration = 0;
1657 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1658 var.init_expression = 0;
1661 void ProgramCompiler::NodeRemover::visit(Iteration &iter)
1663 if(to_remove.count(iter.init_statement.get()))
1664 iter.init_statement = 0;
1668 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1673 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1675 var.precision.clear();
1679 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1683 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1687 SetForScope<bool> set(toplevel, false);
1688 BlockModifier::visit(block);
1691 Visitor::visit(block);
1694 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1696 have_default.insert(prec.type);
1699 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1701 if(var.type_declaration)
1704 string type = var.type;
1705 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1707 else if(!type.compare(0, 3, "ivec") || type=="uint")
1710 if(!have_default.count(type))
1712 Precision *prec = new Precision;
1713 if(!type.compare(0, 7, "sampler"))
1714 prec->precision = "lowp";
1715 else if(stage->type==FRAGMENT)
1716 prec->precision = "mediump";
1718 prec->precision = "highp";
1720 insert_nodes.push_back(prec);
1722 have_default.insert(type);
1727 ProgramCompiler::LegacyConverter::LegacyConverter():
1728 target_api(get_gl_api()),
1729 target_version(get_glsl_version()),
1733 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1734 target_api(get_gl_api()),
1739 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1741 if(target_version<feature_version)
1743 else if(stage->required_version<feature_version)
1744 stage->required_version = feature_version;
1749 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1751 if(target_api==OPENGL_ES2)
1752 return check_version(Version(3, 0));
1754 return check_version(Version(1, 30));
1757 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1759 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1761 var.name = "gl_FragColor";
1762 var.declaration = 0;
1765 else if(var.declaration)
1766 type = var.declaration->type;
1771 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1773 TraversingVisitor::visit(assign);
1774 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1775 assign.target_declaration = 0;
1778 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1780 if(target_api==OPENGL_ES2)
1781 return check_version(Version(3, 0));
1783 return check_version(Version(1, 30));
1786 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1788 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1790 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1791 if(i!=call.arguments.end())
1794 if(type=="sampler1D")
1795 call.name = "texture1D";
1796 else if(type=="sampler2D")
1797 call.name = "texture2D";
1798 else if(type=="sampler3D")
1799 call.name = "texture3D";
1800 else if(type=="sampler1DShadow")
1801 call.name = "shadow1D";
1802 else if(type=="sampler2DShadow")
1803 call.name = "shadow2D";
1805 for(; i!=call.arguments.end(); ++i)
1810 TraversingVisitor::visit(call);
1813 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1815 if(target_api==OPENGL_ES2)
1816 return check_version(Version(3, 0));
1818 return check_version(Version(3, 30));
1821 bool ProgramCompiler::LegacyConverter::supports_centroid_sampling() const
1823 if(target_api==OPENGL_ES2)
1824 return check_version(Version(3, 0));
1826 return check_version(Version(1, 20));
1829 bool ProgramCompiler::LegacyConverter::supports_sample_sampling() const
1831 if(target_api==OPENGL_ES2)
1832 return check_version(Version(3, 20));
1834 return check_version(Version(4, 0));
1837 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1839 if(var.layout && !supports_interface_layouts())
1841 vector<Layout::Qualifier>::iterator i;
1842 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1843 if(i!=var.layout->qualifiers.end())
1845 unsigned location = lexical_cast<unsigned>(i->value);
1846 if(stage->type==VERTEX && var.interface=="in")
1848 stage->locations[var.name] = location;
1849 var.layout->qualifiers.erase(i);
1851 else if(stage->type==FRAGMENT && var.interface=="out")
1854 static Require _req(EXT_gpu_shader4);
1855 stage->locations[var.name] = location;
1856 var.layout->qualifiers.erase(i);
1859 if(var.layout->qualifiers.empty())
1864 if(var.sampling=="centroid")
1866 if(!supports_centroid_sampling())
1867 var.sampling = string();
1869 else if(var.sampling=="sample")
1871 if(!supports_sample_sampling())
1872 var.sampling = string();
1875 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1877 if(stage->type==FRAGMENT && var.interface=="out")
1884 TraversingVisitor::visit(var);
1887 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1889 if(target_api==OPENGL_ES2)
1891 if(iface=="uniform")
1892 return check_version(Version(3, 0));
1894 return check_version(Version(3, 20));
1897 return check_version(Version(1, 50));
1900 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1902 if(!supports_interface_blocks(iface.interface))
1903 flatten_block(iface.members);