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 list<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
134 for(list<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<VariableRenamer>(stage);
209 apply<DeclarationReorderer>(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.sampling.empty())
462 formatted += format("%s ", var.sampling);
463 if(!var.interface.empty() && var.interface!=block_interface)
465 string interface = var.interface;
466 if(stage->required_version<Version(1, 30))
468 if(stage->type==VERTEX && var.interface=="in")
469 interface = "attribute";
470 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
471 interface = "varying";
473 formatted += format("%s ", interface);
475 if(!var.precision.empty())
476 formatted += format("%s ", var.precision);
477 formatted += format("%s %s", var.type, var.name);
482 var.array_size->visit(*this);
485 if(var.init_expression)
488 var.init_expression->visit(*this);
494 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
496 SetForScope<string> set(block_interface, iface.interface);
497 formatted += format("%s %s\n", iface.interface, iface.name);
498 iface.members.visit(*this);
502 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
504 formatted += format("%s %s(", func.return_type, func.name);
505 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
507 if(i!=func.parameters.begin())
509 SetFlag set(parameter_list);
513 if(func.definition==&func)
516 func.body.visit(*this);
522 void ProgramCompiler::Formatter::visit(Conditional &cond)
525 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
530 cond.condition->visit(*this);
533 cond.body.visit(*this);
534 if(!cond.else_body.body.empty())
536 formatted += format("\n%selse\n", string(indent*2, ' '));
537 SetForScope<unsigned> set(else_if, 2);
538 cond.else_body.visit(*this);
542 void ProgramCompiler::Formatter::visit(Iteration &iter)
545 iter.init_statement->visit(*this);
547 iter.condition->visit(*this);
549 iter.loop_expression->visit(*this);
551 iter.body.visit(*this);
554 void ProgramCompiler::Formatter::visit(Return &ret)
556 formatted += "return ";
557 ret.expression->visit(*this);
561 void ProgramCompiler::Formatter::visit(Jump &jump)
563 formatted += jump.keyword;
568 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
572 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
577 SetForScope<bool> set(toplevel, false);
578 BlockModifier::visit(block);
581 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
583 vector<FunctionDeclaration *> &decls = functions[func.name];
586 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
588 (*i)->definition = func.definition;
589 (*i)->body.body.clear();
592 decls.push_back(&func);
595 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
597 VariableDeclaration *&ptr = variables[var.name];
600 ptr->type = var.type;
601 if(var.init_expression)
602 ptr->init_expression = var.init_expression;
610 ProgramCompiler::VariableResolver::VariableResolver():
612 record_target(false),
613 assignment_target(0),
614 self_referencing(false)
617 void ProgramCompiler::VariableResolver::apply(Stage &s)
619 SetForScope<Stage *> set(stage, &s);
620 Stage *builtins = get_builtins(stage->type);
622 blocks.push_back(&builtins->content);
623 stage->content.visit(*this);
628 void ProgramCompiler::VariableResolver::visit(Block &block)
630 blocks.push_back(&block);
631 block.variables.clear();
632 TraversingVisitor::visit(block);
636 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
640 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
643 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
644 if(j!=(*i)->variables.end())
646 var.declaration = j->second;
647 type = j->second->type_declaration;
654 if(assignment_target)
656 record_target = false;
657 assignment_target = 0;
660 assignment_target = var.declaration;
662 else if(var.declaration && var.declaration==assignment_target)
663 self_referencing = true;
666 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
669 TraversingVisitor::visit(memacc);
670 memacc.declaration = 0;
673 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
674 if(i!=type->members.variables.end())
676 memacc.declaration = i->second;
677 type = i->second->type_declaration;
684 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
689 SetForScope<bool> set(record_target, false);
690 binary.right->visit(*this);
693 binary.left->visit(*this);
697 TraversingVisitor::visit(binary);
702 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
705 SetFlag set(record_target);
706 assignment_target = 0;
707 assign.left->visit(*this);
710 self_referencing = false;
711 assign.right->visit(*this);
713 assign.self_referencing = (self_referencing || assign.oper!="=");
714 assign.target_declaration = assignment_target;
717 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
719 TraversingVisitor::visit(strct);
720 blocks.back()->types[strct.name] = &strct;
723 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
725 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
728 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
729 if(j!=(*i)->types.end())
730 var.type_declaration = j->second;
733 if(!block_interface.empty() && var.interface.empty())
734 var.interface = block_interface;
736 TraversingVisitor::visit(var);
737 blocks.back()->variables[var.name] = &var;
738 if(anonymous && blocks.size()>1)
739 blocks[blocks.size()-2]->variables[var.name] = &var;
742 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
744 SetFlag set(anonymous);
745 SetForScope<string> set2(block_interface, iface.interface);
746 TraversingVisitor::visit(iface);
750 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
752 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
753 if(i!=functions.end())
754 call.declaration = i->second.back();
756 TraversingVisitor::visit(call);
759 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
761 vector<FunctionDeclaration *> &decls = functions[func.name];
764 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
765 (*i)->definition = func.definition;
767 decls.push_back(&func);
769 else if(!decls.empty() && decls.back()->definition)
770 func.definition = decls.back()->definition;
772 decls.push_back(&func);
774 TraversingVisitor::visit(func);
778 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
782 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
786 else if(type==GEOMETRY)
792 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
794 SetForScope<Stage *> set(stage, &s);
796 in_prefix = get_out_prefix(stage->previous->type);
797 out_prefix = get_out_prefix(stage->type);
798 stage->content.visit(*this);
801 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
803 SetForScope<unsigned> set(scope_level, scope_level+1);
804 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
810 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
812 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
815 iface_declarations.clear();
818 apply_and_increment(block, i);
822 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
824 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
825 return prefix+name.substr(offset);
828 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
830 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
831 if(stage_vars.count(name) || iface_declarations.count(name))
834 VariableDeclaration* iface_var = new VariableDeclaration;
835 iface_var->sampling = var.sampling;
836 iface_var->interface = iface;
837 iface_var->type = var.type;
838 iface_var->type_declaration = var.type_declaration;
839 iface_var->name = name;
840 if(stage->type==GEOMETRY)
841 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
843 iface_var->array = var.array;
845 iface_var->array_size = var.array_size;
847 iface_var->linked_declaration = &var;
848 iface_declarations[name] = iface_var;
853 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
855 Assignment *assign = new Assignment;
856 VariableReference *ref = new VariableReference;
860 assign->right = right;
862 ExpressionStatement *stmt = new ExpressionStatement;
863 stmt->expression = assign;
864 insert_nodes.push_back(stmt);
867 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
869 if(var.declaration || !stage->previous)
871 if(iface_declarations.count(var.name))
874 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
875 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
876 if(i==prev_out.end())
877 i = prev_out.find(in_prefix+var.name);
878 if(i!=prev_out.end())
879 generate_interface(*i->second, "in", var.name);
882 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
884 if(var.interface=="out")
887 stage->out_variables[var.name] = &var;
888 else if(generate_interface(var, "out", change_prefix(var.name, string())))
891 if(var.init_expression)
892 insert_assignment(var.name, var.init_expression->clone());
895 else if(var.interface=="in")
897 stage->in_variables[var.name] = &var;
898 if(var.linked_declaration)
899 var.linked_declaration->linked_declaration = &var;
900 else if(stage->previous)
902 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
903 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
904 if(i!=prev_out.end())
906 var.linked_declaration = i->second;
907 i->second->linked_declaration = &var;
912 TraversingVisitor::visit(var);
915 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
917 vector<VariableDeclaration *> pass_vars;
919 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
920 pass_vars.push_back(i->second);
921 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
922 if(i->second->interface=="in")
923 pass_vars.push_back(i->second.get());
927 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
928 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
931 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
932 linked = ((*j)->linked_declaration==i->second);
934 if(!linked && generate_interface(*i->second, "in", i->second->name))
935 pass_vars.push_back(i->second);
939 if(stage->type==GEOMETRY)
941 VariableReference *ref = new VariableReference;
944 BinaryExpression *subscript = new BinaryExpression;
945 subscript->left = ref;
946 subscript->oper = "[";
947 subscript->right = pass.subscript;
948 subscript->after = "]";
950 MemberAccess *memacc = new MemberAccess;
951 memacc->left = subscript;
952 memacc->member = "gl_Position";
954 insert_assignment("gl_Position", memacc);
957 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
959 string out_name = change_prefix((*i)->name, out_prefix);
960 generate_interface(**i, "out", out_name);
962 VariableReference *ref = new VariableReference;
963 ref->name = (*i)->name;
966 BinaryExpression *subscript = new BinaryExpression;
967 subscript->left = ref;
968 subscript->oper = "[";
969 subscript->right = pass.subscript;
970 subscript->after = "]";
971 insert_assignment(out_name, subscript);
974 insert_assignment(out_name, ref);
981 void ProgramCompiler::VariableRenamer::visit(VariableReference &var)
984 var.name = var.declaration->name;
987 void ProgramCompiler::VariableRenamer::visit(VariableDeclaration &var)
989 if(var.linked_declaration)
990 var.name = var.linked_declaration->name;
991 TraversingVisitor::visit(var);
995 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
999 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
1001 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
1002 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
1004 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1006 kind = NO_DECLARATION;
1010 if(kind==STRUCT && struct_insert_point!=block.body.end())
1012 block.body.insert(struct_insert_point, *i);
1015 else if(kind>STRUCT && struct_insert_point==block.body.end())
1016 struct_insert_point = i;
1018 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1020 block.body.insert(variable_insert_point, *i);
1023 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1024 variable_insert_point = i;
1027 block.body.erase(i++);
1034 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1038 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1040 FunctionDeclaration *def = call.declaration;
1041 if(def && def->definition!=def)
1042 def = def->definition;
1046 unsigned &count = refcounts[def];
1048 if(count>1 || def==in_function)
1049 inlineable.erase(def);
1052 TraversingVisitor::visit(call);
1055 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1057 unsigned &count = refcounts[func.definition];
1058 if(!count && func.parameters.empty())
1059 inlineable.insert(func.definition);
1061 SetForScope<FunctionDeclaration *> set(in_function, &func);
1062 TraversingVisitor::visit(func);
1066 ProgramCompiler::FunctionInliner::FunctionInliner():
1070 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1075 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1080 ptr = inline_result;
1083 void ProgramCompiler::FunctionInliner::visit(Block &block)
1088 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1096 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1098 visit_and_inline(unary.expression);
1102 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1104 visit_and_inline(binary.left);
1105 visit_and_inline(binary.right);
1109 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1111 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1112 visit_and_inline(*i);
1114 FunctionDeclaration *def = call.declaration;
1115 if(def && def->definition!=def)
1116 def = def->definition;
1118 if(def && inlineable.count(def))
1127 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1129 TraversingVisitor::visit(ret);
1132 inline_result = ret.expression->clone();
1136 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1142 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1143 variable_values(&v),
1148 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1150 if(literal.token=="true")
1152 else if(literal.token=="false")
1155 result = lexical_cast<float>(literal.token);
1156 result_valid = true;
1159 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1161 parexp.expression->visit(*this);
1164 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1166 if(!var.declaration)
1171 ValueMap::const_iterator i = variable_values->find(var.declaration);
1172 if(i!=variable_values->end())
1173 i->second->visit(*this);
1175 else if(var.declaration->init_expression)
1176 var.declaration->init_expression->visit(*this);
1179 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1181 result_valid = false;
1182 unary.expression->visit(*this);
1189 result_valid = false;
1192 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1194 result_valid = false;
1195 binary.left->visit(*this);
1199 float left_result = result;
1200 result_valid = false;
1201 binary.right->visit(*this);
1205 if(binary.oper=="<")
1206 result = (left_result<result);
1207 else if(binary.oper=="<=")
1208 result = (left_result<=result);
1209 else if(binary.oper==">")
1210 result = (left_result>result);
1211 else if(binary.oper==">=")
1212 result = (left_result>=result);
1213 else if(binary.oper=="==")
1214 result = (left_result==result);
1215 else if(binary.oper=="!=")
1216 result = (left_result!=result);
1217 else if(binary.oper=="&&")
1218 result = (left_result && result);
1219 else if(binary.oper=="||")
1220 result = (left_result || result);
1222 result_valid = false;
1226 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1230 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1232 SetForScope<unsigned> set(scope_level, scope_level+1);
1233 BlockModifier::visit(block);
1235 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1236 variable_values.erase(i->second);
1239 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1241 variable_values.erase(assign.target_declaration);
1244 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1246 if(var.constant || scope_level>1)
1247 variable_values[&var] = var.init_expression.get();
1250 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1252 ExpressionEvaluator eval(variable_values);
1253 cond.condition->visit(eval);
1254 if(eval.result_valid)
1255 flatten_block(eval.result ? cond.body : cond.else_body);
1257 TraversingVisitor::visit(cond);
1260 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1264 ExpressionEvaluator eval;
1265 iter.condition->visit(eval);
1266 if(eval.result_valid && !eval.result)
1273 TraversingVisitor::visit(iter);
1277 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1280 assignment_target(false),
1284 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1286 variables.push_back(BlockVariableMap());
1288 BlockVariableMap &global_variables = variables.back();
1289 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1291 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1293 if(!i->second.referenced)
1295 unused_nodes.insert(i->first);
1296 clear_assignments(i->second, true);
1299 variables.pop_back();
1302 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1304 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1305 if(i!=aggregates.end())
1306 unused_nodes.erase(i->second);
1308 if(var.declaration && !assignment_target)
1310 VariableInfo &var_info = variables.back()[var.declaration];
1311 var_info.assignments.clear();
1312 var_info.referenced = true;
1316 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1318 TraversingVisitor::visit(memacc);
1319 unused_nodes.erase(memacc.declaration);
1322 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1324 if(binary.oper=="[")
1326 binary.left->visit(*this);
1327 SetForScope<bool> set(assignment_target, false);
1328 binary.right->visit(*this);
1331 TraversingVisitor::visit(binary);
1334 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1337 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1338 assign.left->visit(*this);
1340 assign.right->visit(*this);
1341 assignment = &assign;
1344 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1346 VariableInfo &var_info = variables.back()[&var];
1348 clear_assignments(var_info, true);
1349 var_info.assignments.push_back(&node);
1350 var_info.conditionally_assigned = false;
1353 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1357 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1358 unused_nodes.insert(*i);
1360 var_info.assignments.clear();
1363 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1366 TraversingVisitor::visit(expr);
1367 if(assignment && assignment->target_declaration)
1368 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1371 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1373 SetForScope<Node *> set(aggregate, &strct);
1374 unused_nodes.insert(&strct);
1375 TraversingVisitor::visit(strct);
1378 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1381 aggregates[&var] = aggregate;
1384 variables.back()[&var].local = true;
1385 if(var.init_expression)
1386 record_assignment(var, *var.init_expression, false);
1388 unused_nodes.erase(var.type_declaration);
1389 TraversingVisitor::visit(var);
1392 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1394 SetForScope<Node *> set(aggregate, &iface);
1395 unused_nodes.insert(&iface);
1396 TraversingVisitor::visit(iface);
1399 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1401 variables.push_back(BlockVariableMap());
1404 SetForScope<bool> set(global_scope, false);
1405 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1407 func.body.visit(*this);
1410 BlockVariableMap &block_variables = variables.back();
1411 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1412 i->second.conditionally_assigned = true;
1413 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1414 block_variables[i->get()].referenced = true;
1415 merge_down_variables();
1418 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1420 BlockVariableMap &parent_variables = variables[variables.size()-2];
1421 BlockVariableMap &block_variables = variables.back();
1422 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1426 if(!i->second.referenced)
1427 unused_nodes.insert(i->first);
1428 clear_assignments(i->second, true);
1432 BlockVariableMap::iterator j = parent_variables.find(i->first);
1433 if(j==parent_variables.end())
1434 parent_variables.insert(*i);
1437 if(i->second.referenced || !i->second.conditionally_assigned)
1438 clear_assignments(j->second, !i->second.referenced);
1439 j->second.conditionally_assigned = i->second.conditionally_assigned;
1440 j->second.referenced |= i->second.referenced;
1441 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1444 variables.pop_back();
1447 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1449 cond.condition->visit(*this);
1450 variables.push_back(BlockVariableMap());
1451 cond.body.visit(*this);
1453 BlockVariableMap if_variables;
1454 swap(variables.back(), if_variables);
1455 cond.else_body.visit(*this);
1457 BlockVariableMap &else_variables = variables.back();
1458 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1460 BlockVariableMap::iterator j = if_variables.find(i->first);
1461 if(j!=if_variables.end())
1463 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1464 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1465 if_variables.erase(j);
1468 i->second.conditionally_assigned = true;
1471 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1473 i->second.conditionally_assigned = true;
1474 else_variables.insert(*i);
1477 merge_down_variables();
1480 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1482 variables.push_back(BlockVariableMap());
1483 TraversingVisitor::visit(iter);
1485 BlockVariableMap &block_variables = variables.back();
1486 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1487 if(!i->second.local && i->second.referenced)
1488 i->second.assignments.clear();
1490 merge_down_variables();
1494 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1496 conditionally_assigned(false),
1501 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1503 TraversingVisitor::visit(call);
1505 unused_nodes.erase(call.declaration);
1506 if(call.declaration && call.declaration->definition!=call.declaration)
1507 used_definitions.insert(call.declaration->definition);
1510 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1512 TraversingVisitor::visit(func);
1514 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1515 unused_nodes.insert(&func);
1519 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1523 void ProgramCompiler::NodeRemover::visit(Block &block)
1525 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1528 if(to_remove.count(i->get()))
1529 block.body.erase(i++);
1535 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1537 if(to_remove.count(&var))
1539 stage->in_variables.erase(var.name);
1540 stage->out_variables.erase(var.name);
1541 stage->locations.erase(var.name);
1542 if(var.linked_declaration)
1543 var.linked_declaration->linked_declaration = 0;
1545 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1546 var.init_expression = 0;
1550 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1555 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1557 var.precision.clear();
1561 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1565 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1569 SetForScope<bool> set(toplevel, false);
1570 BlockModifier::visit(block);
1573 Visitor::visit(block);
1576 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1578 have_default.insert(prec.type);
1581 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1583 if(var.type_declaration)
1586 string type = var.type;
1587 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1589 else if(!type.compare(0, 3, "ivec") || type=="uint")
1592 if(!have_default.count(type))
1594 Precision *prec = new Precision;
1595 if(!type.compare(0, 7, "sampler"))
1596 prec->precision = "lowp";
1597 else if(stage->type==FRAGMENT)
1598 prec->precision = "mediump";
1600 prec->precision = "highp";
1602 insert_nodes.push_back(prec);
1604 have_default.insert(type);
1609 ProgramCompiler::LegacyConverter::LegacyConverter():
1610 target_api(get_gl_api()),
1611 target_version(get_glsl_version()),
1615 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1616 target_api(get_gl_api()),
1621 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1623 if(target_version<feature_version)
1625 else if(stage->required_version<feature_version)
1626 stage->required_version = feature_version;
1631 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1633 if(target_api==OPENGL_ES2)
1634 return check_version(Version(3, 0));
1636 return check_version(Version(1, 30));
1639 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1641 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1643 var.name = "gl_FragColor";
1644 var.declaration = 0;
1647 else if(var.declaration)
1648 type = var.declaration->type;
1653 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1655 TraversingVisitor::visit(assign);
1656 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1657 assign.target_declaration = 0;
1660 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1662 if(target_api==OPENGL_ES2)
1663 return check_version(Version(3, 0));
1665 return check_version(Version(1, 30));
1668 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1670 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1672 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1673 if(i!=call.arguments.end())
1676 if(type=="sampler1D")
1677 call.name = "texture1D";
1678 else if(type=="sampler2D")
1679 call.name = "texture2D";
1680 else if(type=="sampler3D")
1681 call.name = "texture3D";
1682 else if(type=="sampler1DShadow")
1683 call.name = "shadow1D";
1684 else if(type=="sampler2DShadow")
1685 call.name = "shadow2D";
1687 for(; i!=call.arguments.end(); ++i)
1692 TraversingVisitor::visit(call);
1695 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1697 if(target_api==OPENGL_ES2)
1698 return check_version(Version(3, 0));
1700 return check_version(Version(3, 30));
1703 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1705 if(var.layout && !supports_interface_layouts())
1707 vector<Layout::Qualifier>::iterator i;
1708 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1709 if(i!=var.layout->qualifiers.end())
1711 unsigned location = lexical_cast<unsigned>(i->value);
1712 if(stage->type==VERTEX && var.interface=="in")
1714 stage->locations[var.name] = location;
1715 var.layout->qualifiers.erase(i);
1717 else if(stage->type==FRAGMENT && var.interface=="out")
1720 static Require _req(EXT_gpu_shader4);
1721 stage->locations[var.name] = location;
1722 var.layout->qualifiers.erase(i);
1725 if(var.layout->qualifiers.empty())
1730 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1732 if(stage->type==FRAGMENT && var.interface=="out")
1739 TraversingVisitor::visit(var);
1742 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1744 if(target_api==OPENGL_ES2)
1746 if(iface=="uniform")
1747 return check_version(Version(3, 0));
1749 return check_version(Version(3, 20));
1752 return check_version(Version(1, 50));
1755 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1757 if(!supports_interface_blocks(iface.interface))
1758 flatten_block(iface.members);