1 #include <msp/core/raii.h>
2 #include <msp/strings/format.h>
3 #include <msp/strings/utils.h>
6 #include "programcompiler.h"
14 const char builtins_src[] =
16 "out gl_PerVertex {\n"
17 " vec4 gl_Position;\n"
18 " float gl_ClipDistance[];\n"
22 " vec4 gl_Position;\n"
23 " float gl_ClipDistance[];\n"
25 "out gl_PerVertex {\n"
26 " vec4 gl_Position;\n"
27 " float gl_ClipDistance[];\n"
35 using namespace ProgramSyntax;
37 ProgramCompiler::ProgramCompiler():
42 void ProgramCompiler::compile(const string &source)
45 module = &parser.parse(source);
49 void ProgramCompiler::compile(IO::Base &io, Resources *res)
52 module = &parser.parse(io);
56 void ProgramCompiler::add_shaders(Program &program)
59 throw invalid_operation("ProgramCompiler::add_shaders");
61 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
65 program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
66 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
67 program.bind_attribute(j->second, j->first);
69 else if(i->type==GEOMETRY)
70 program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
71 else if(i->type==FRAGMENT)
73 program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
74 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
75 program.bind_fragment_data(j->second, j->first);
80 Module *ProgramCompiler::create_builtins_module()
83 Module *module = new Module(parser.parse(builtins_src));
84 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
86 VariableResolver resolver;
87 i->content.visit(resolver);
88 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
89 j->second->linked_declaration = j->second;
94 Module &ProgramCompiler::get_builtins_module()
96 static RefPtr<Module> builtins_module = create_builtins_module();
97 return *builtins_module;
100 Stage *ProgramCompiler::get_builtins(StageType type)
102 Module &module = get_builtins_module();
103 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
109 void ProgramCompiler::process()
111 list<Import *> imports = apply<NodeGatherer<Import> >(module->shared);
112 for(list<Import *>::iterator i=imports.end(); i!=imports.begin(); )
113 import((*--i)->module);
114 apply<NodeRemover>(module->shared, set<Node *>(imports.begin(), imports.end()));
116 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
118 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
121 i = module->stages.begin();
127 void ProgramCompiler::import(const string &name)
129 string fn = name+".glsl";
130 RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
132 throw runtime_error(format("module %s not found", name));
133 ProgramParser import_parser;
134 Module &imported_module = import_parser.parse(*io);
136 inject_block(module->shared.content, imported_module.shared.content);
137 apply<DeclarationCombiner>(module->shared);
138 for(list<Stage>::iterator i=imported_module.stages.begin(); i!=imported_module.stages.end(); ++i)
140 list<Stage>::iterator j;
141 for(j=module->stages.begin(); (j!=module->stages.end() && j->type<i->type); ++j) ;
142 if(j==module->stages.end() || j->type>i->type)
144 j = module->stages.insert(j, *i);
145 list<Stage>::iterator k = j;
146 if(++k!=module->stages.end())
148 if(j!=module->stages.begin())
149 j->previous = &*--(k=j);
153 inject_block(j->content, i->content);
154 apply<DeclarationCombiner>(*j);
159 void ProgramCompiler::generate(Stage &stage)
161 inject_block(stage.content, module->shared.content);
163 apply<DeclarationReorderer>(stage);
164 apply<FunctionResolver>(stage);
165 apply<VariableResolver>(stage);
166 apply<InterfaceGenerator>(stage);
167 apply<VariableResolver>(stage);
168 apply<VariableRenamer>(stage);
169 apply<DeclarationReorderer>(stage);
170 apply<LegacyConverter>(stage);
173 bool ProgramCompiler::optimize(Stage &stage)
175 apply<ConstantConditionEliminator>(stage);
177 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
178 apply<FunctionInliner>(stage, inlineable);
180 set<Node *> unused = apply<UnusedVariableLocator>(stage);
181 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
182 unused.insert(unused2.begin(), unused2.end());
183 apply<NodeRemover>(stage, unused);
185 return !unused.empty();
188 void ProgramCompiler::inject_block(Block &target, const Block &source)
190 list<RefPtr<Node> >::iterator insert_point = target.body.begin();
191 for(list<RefPtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
192 target.body.insert(insert_point, (*i)->clone());
196 typename T::ResultType ProgramCompiler::apply(Stage &stage)
199 visitor.apply(stage);
200 return visitor.get_result();
203 template<typename T, typename A>
204 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
207 visitor.apply(stage);
208 return visitor.get_result();
212 ProgramCompiler::Visitor::Visitor():
216 void ProgramCompiler::Visitor::apply(Stage &s)
218 SetForScope<Stage *> set(stage, &s);
219 stage->content.visit(*this);
223 ProgramCompiler::Formatter::Formatter():
225 parameter_list(false),
229 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
231 GLApi api = get_gl_api();
232 const Version &ver = s.required_version;
236 formatted += format("#version %d%02d", ver.major, ver.minor);
237 if(api==OPENGL_ES2 && ver>=Version(3, 0))
245 formatted += "precision mediump float;\n";
251 void ProgramCompiler::Formatter::visit(Literal &literal)
253 formatted += literal.token;
256 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
259 parexpr.expression->visit(*this);
263 void ProgramCompiler::Formatter::visit(VariableReference &var)
265 formatted += var.name;
268 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
270 memacc.left->visit(*this);
271 formatted += format(".%s", memacc.member);
274 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
277 formatted += unary.oper;
278 unary.expression->visit(*this);
280 formatted += unary.oper;
283 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
285 binary.left->visit(*this);
286 formatted += binary.oper;
287 binary.right->visit(*this);
288 formatted += binary.after;
291 void ProgramCompiler::Formatter::visit(Assignment &assign)
293 assign.left->visit(*this);
294 formatted += format(" %s ", assign.oper);
295 assign.right->visit(*this);
298 void ProgramCompiler::Formatter::visit(FunctionCall &call)
300 formatted += format("%s(", call.name);
301 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
303 if(i!=call.arguments.begin())
310 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
312 expr.expression->visit(*this);
316 void ProgramCompiler::Formatter::visit(Block &block)
321 unsigned brace_indent = indent;
322 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
324 formatted += format("%s{\n", string(brace_indent*2, ' '));
326 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
327 string spaces(indent*2, ' ');
328 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
330 if(i!=block.body.begin())
338 formatted += format("\n%s}", string(brace_indent*2, ' '));
341 void ProgramCompiler::Formatter::visit(Import &import)
343 formatted += format("import %s;", import.module);
346 void ProgramCompiler::Formatter::visit(Layout &layout)
348 formatted += "layout(";
349 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
351 if(i!=layout.qualifiers.begin())
353 formatted += i->identifier;
354 if(!i->value.empty())
355 formatted += format("=%s", i->value);
360 void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
362 layout.layout.visit(*this);
363 formatted += format(" %s;", layout.interface);
366 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
368 formatted += format("struct %s\n", strct.name);
369 strct.members.visit(*this);
373 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
377 var.layout->visit(*this);
381 formatted += "const ";
382 if(!var.sampling.empty())
383 formatted += format("%s ", var.sampling);
384 if(!var.interface.empty() && var.interface!=block_interface)
386 string interface = var.interface;
387 if(stage->required_version<Version(1, 30))
389 if(stage->type==VERTEX && var.interface=="in")
390 interface = "attribute";
391 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
392 interface = "varying";
394 formatted += format("%s ", interface);
396 formatted += format("%s %s", var.type, var.name);
401 var.array_size->visit(*this);
404 if(var.init_expression)
407 var.init_expression->visit(*this);
413 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
415 SetForScope<string> set(block_interface, iface.interface);
416 formatted += format("%s %s\n", iface.interface, iface.name);
417 iface.members.visit(*this);
421 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
423 formatted += format("%s %s(", func.return_type, func.name);
424 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
426 if(i!=func.parameters.begin())
428 SetFlag set(parameter_list);
432 if(func.definition==&func)
435 func.body.visit(*this);
441 void ProgramCompiler::Formatter::visit(Conditional &cond)
444 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
449 cond.condition->visit(*this);
452 cond.body.visit(*this);
453 if(!cond.else_body.body.empty())
455 formatted += format("\n%selse\n", string(indent*2, ' '));
456 SetForScope<unsigned> set(else_if, 2);
457 cond.else_body.visit(*this);
461 void ProgramCompiler::Formatter::visit(Iteration &iter)
464 iter.init_statement->visit(*this);
466 iter.condition->visit(*this);
468 iter.loop_expression->visit(*this);
470 iter.body.visit(*this);
473 void ProgramCompiler::Formatter::visit(Return &ret)
475 formatted += "return ";
476 ret.expression->visit(*this);
480 void ProgramCompiler::Formatter::visit(Jump &jump)
482 formatted += jump.keyword;
487 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
492 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
497 SetForScope<bool> set(toplevel, false);
498 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
503 block.body.erase(i++);
509 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
511 vector<FunctionDeclaration *> &decls = functions[func.name];
514 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
516 (*i)->definition = func.definition;
517 (*i)->body.body.clear();
520 decls.push_back(&func);
523 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
525 VariableDeclaration *&ptr = variables[var.name];
528 ptr->type = var.type;
529 if(var.init_expression)
530 ptr->init_expression = var.init_expression;
538 ProgramCompiler::VariableResolver::VariableResolver():
540 record_target(false),
541 assignment_target(0),
542 self_referencing(false)
545 void ProgramCompiler::VariableResolver::apply(Stage &s)
547 SetForScope<Stage *> set(stage, &s);
548 Stage *builtins = get_builtins(stage->type);
550 blocks.push_back(&builtins->content);
551 stage->content.visit(*this);
556 void ProgramCompiler::VariableResolver::visit(Block &block)
558 blocks.push_back(&block);
559 block.variables.clear();
560 TraversingVisitor::visit(block);
564 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
568 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
571 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
572 if(j!=(*i)->variables.end())
574 var.declaration = j->second;
575 type = j->second->type_declaration;
582 if(assignment_target)
584 record_target = false;
585 assignment_target = 0;
588 assignment_target = var.declaration;
590 else if(var.declaration && var.declaration==assignment_target)
591 self_referencing = true;
594 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
597 TraversingVisitor::visit(memacc);
598 memacc.declaration = 0;
601 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
602 if(i!=type->members.variables.end())
604 memacc.declaration = i->second;
605 type = i->second->type_declaration;
612 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
617 SetForScope<bool> set(record_target, false);
618 binary.right->visit(*this);
621 binary.left->visit(*this);
625 TraversingVisitor::visit(binary);
630 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
633 SetFlag set(record_target);
634 assignment_target = 0;
635 assign.left->visit(*this);
638 self_referencing = false;
639 assign.right->visit(*this);
641 assign.self_referencing = (self_referencing || assign.oper!="=");
642 assign.target_declaration = assignment_target;
645 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
647 TraversingVisitor::visit(strct);
648 blocks.back()->types[strct.name] = &strct;
651 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
653 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
656 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
657 if(j!=(*i)->types.end())
658 var.type_declaration = j->second;
661 if(!block_interface.empty() && var.interface.empty())
662 var.interface = block_interface;
664 TraversingVisitor::visit(var);
665 blocks.back()->variables[var.name] = &var;
666 if(anonymous && blocks.size()>1)
667 blocks[blocks.size()-2]->variables[var.name] = &var;
670 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
672 SetFlag set(anonymous);
673 SetForScope<string> set2(block_interface, iface.interface);
674 TraversingVisitor::visit(iface);
678 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
680 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
681 if(i!=functions.end())
682 call.declaration = i->second.back();
684 TraversingVisitor::visit(call);
687 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
689 vector<FunctionDeclaration *> &decls = functions[func.name];
692 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
693 (*i)->definition = func.definition;
695 decls.push_back(&func);
697 else if(!decls.empty() && decls.back()->definition)
698 func.definition = decls.back()->definition;
700 decls.push_back(&func);
702 TraversingVisitor::visit(func);
706 ProgramCompiler::BlockModifier::BlockModifier():
710 void ProgramCompiler::BlockModifier::flatten_block(Block &block)
712 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
716 void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
718 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
719 insert_nodes.clear();
722 block.body.erase(i++);
728 void ProgramCompiler::BlockModifier::visit(Block &block)
730 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
733 apply_and_increment(block, i);
738 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
742 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
746 else if(type==GEOMETRY)
752 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
754 SetForScope<Stage *> set(stage, &s);
756 in_prefix = get_out_prefix(stage->previous->type);
757 out_prefix = get_out_prefix(stage->type);
758 stage->content.visit(*this);
761 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
763 SetForScope<unsigned> set(scope_level, scope_level+1);
764 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
770 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
772 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
775 iface_declarations.clear();
778 apply_and_increment(block, i);
782 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
784 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
785 return prefix+name.substr(offset);
788 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
790 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
791 if(stage_vars.count(name) || iface_declarations.count(name))
794 VariableDeclaration* iface_var = new VariableDeclaration;
795 iface_var->sampling = var.sampling;
796 iface_var->interface = iface;
797 iface_var->type = var.type;
798 iface_var->type_declaration = var.type_declaration;
799 iface_var->name = name;
800 if(stage->type==GEOMETRY)
801 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
803 iface_var->array = var.array;
805 iface_var->array_size = var.array_size;
807 iface_var->linked_declaration = &var;
808 iface_declarations[name] = iface_var;
813 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
815 Assignment *assign = new Assignment;
816 VariableReference *ref = new VariableReference;
820 assign->right = right;
822 ExpressionStatement *stmt = new ExpressionStatement;
823 stmt->expression = assign;
824 insert_nodes.push_back(stmt);
827 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
829 if(var.declaration || !stage->previous)
831 if(iface_declarations.count(var.name))
834 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
835 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
836 if(i==prev_out.end())
837 i = prev_out.find(in_prefix+var.name);
838 if(i!=prev_out.end())
839 generate_interface(*i->second, "in", var.name);
842 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
844 if(var.interface=="out")
847 stage->out_variables[var.name] = &var;
848 else if(generate_interface(var, "out", change_prefix(var.name, string())))
851 if(var.init_expression)
852 insert_assignment(var.name, var.init_expression->clone());
855 else if(var.interface=="in")
857 stage->in_variables[var.name] = &var;
858 if(var.linked_declaration)
859 var.linked_declaration->linked_declaration = &var;
860 else if(stage->previous)
862 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
863 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
864 if(i!=prev_out.end())
866 var.linked_declaration = i->second;
867 i->second->linked_declaration = &var;
872 TraversingVisitor::visit(var);
875 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
877 vector<VariableDeclaration *> pass_vars;
879 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
880 pass_vars.push_back(i->second);
881 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
882 if(i->second->interface=="in")
883 pass_vars.push_back(i->second.get());
887 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
888 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
891 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
892 linked = ((*j)->linked_declaration==i->second);
894 if(!linked && generate_interface(*i->second, "in", i->second->name))
895 pass_vars.push_back(i->second);
899 if(stage->type==GEOMETRY)
901 VariableReference *ref = new VariableReference;
904 BinaryExpression *subscript = new BinaryExpression;
905 subscript->left = ref;
906 subscript->oper = "[";
907 subscript->right = pass.subscript;
908 subscript->after = "]";
910 MemberAccess *memacc = new MemberAccess;
911 memacc->left = subscript;
912 memacc->member = "gl_Position";
914 insert_assignment("gl_Position", memacc);
917 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
919 string out_name = change_prefix((*i)->name, out_prefix);
920 generate_interface(**i, "out", out_name);
922 VariableReference *ref = new VariableReference;
923 ref->name = (*i)->name;
926 BinaryExpression *subscript = new BinaryExpression;
927 subscript->left = ref;
928 subscript->oper = "[";
929 subscript->right = pass.subscript;
930 subscript->after = "]";
931 insert_assignment(out_name, subscript);
934 insert_assignment(out_name, ref);
941 void ProgramCompiler::VariableRenamer::visit(VariableReference &var)
944 var.name = var.declaration->name;
947 void ProgramCompiler::VariableRenamer::visit(VariableDeclaration &var)
949 if(var.linked_declaration)
950 var.name = var.linked_declaration->name;
951 TraversingVisitor::visit(var);
955 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
959 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
961 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
962 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
964 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
966 kind = NO_DECLARATION;
970 if(kind==STRUCT && struct_insert_point!=block.body.end())
972 block.body.insert(struct_insert_point, *i);
975 else if(kind>STRUCT && struct_insert_point==block.body.end())
976 struct_insert_point = i;
978 if(kind==VARIABLE && variable_insert_point!=block.body.end())
980 block.body.insert(variable_insert_point, *i);
983 else if(kind>VARIABLE && variable_insert_point==block.body.end())
984 variable_insert_point = i;
987 block.body.erase(i++);
994 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
998 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1000 FunctionDeclaration *def = call.declaration;
1001 if(def && def->definition!=def)
1002 def = def->definition;
1006 unsigned &count = refcounts[def];
1008 if(count>1 || def==in_function)
1009 inlineable.erase(def);
1012 TraversingVisitor::visit(call);
1015 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1017 unsigned &count = refcounts[func.definition];
1018 if(!count && func.parameters.empty())
1019 inlineable.insert(func.definition);
1021 SetForScope<FunctionDeclaration *> set(in_function, &func);
1022 TraversingVisitor::visit(func);
1026 ProgramCompiler::FunctionInliner::FunctionInliner():
1030 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1035 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1040 ptr = inline_result;
1043 void ProgramCompiler::FunctionInliner::visit(Block &block)
1048 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1056 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1058 visit_and_inline(unary.expression);
1062 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1064 visit_and_inline(binary.left);
1065 visit_and_inline(binary.right);
1069 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1071 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1072 visit_and_inline(*i);
1074 FunctionDeclaration *def = call.declaration;
1075 if(def && def->definition!=def)
1076 def = def->definition;
1078 if(def && inlineable.count(def))
1087 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1089 TraversingVisitor::visit(ret);
1092 inline_result = ret.expression->clone();
1096 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1102 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1103 variable_values(&v),
1108 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1110 if(literal.token=="true")
1112 else if(literal.token=="false")
1115 result = lexical_cast<float>(literal.token);
1116 result_valid = true;
1119 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1121 parexp.expression->visit(*this);
1124 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1126 if(!var.declaration)
1131 ValueMap::const_iterator i = variable_values->find(var.declaration);
1132 if(i!=variable_values->end())
1133 i->second->visit(*this);
1135 else if(var.declaration->init_expression)
1136 var.declaration->init_expression->visit(*this);
1139 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1141 result_valid = false;
1142 unary.expression->visit(*this);
1149 result_valid = false;
1152 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1154 result_valid = false;
1155 binary.left->visit(*this);
1159 float left_result = result;
1160 result_valid = false;
1161 binary.right->visit(*this);
1165 if(binary.oper=="<")
1166 result = (left_result<result);
1167 else if(binary.oper=="<=")
1168 result = (left_result<=result);
1169 else if(binary.oper==">")
1170 result = (left_result>result);
1171 else if(binary.oper==">=")
1172 result = (left_result>=result);
1173 else if(binary.oper=="==")
1174 result = (left_result==result);
1175 else if(binary.oper=="!=")
1176 result = (left_result!=result);
1177 else if(binary.oper=="&&")
1178 result = (left_result && result);
1179 else if(binary.oper=="||")
1180 result = (left_result || result);
1182 result_valid = false;
1186 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1190 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1192 SetForScope<unsigned> set(scope_level, scope_level+1);
1193 BlockModifier::visit(block);
1195 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1196 variable_values.erase(i->second);
1199 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1201 variable_values.erase(assign.target_declaration);
1204 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1206 if(var.constant || scope_level>1)
1207 variable_values[&var] = var.init_expression.get();
1210 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1212 ExpressionEvaluator eval(variable_values);
1213 cond.condition->visit(eval);
1214 if(eval.result_valid)
1215 flatten_block(eval.result ? cond.body : cond.else_body);
1217 TraversingVisitor::visit(cond);
1220 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1224 ExpressionEvaluator eval;
1225 iter.condition->visit(eval);
1226 if(eval.result_valid && !eval.result)
1233 TraversingVisitor::visit(iter);
1237 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1240 assignment_target(false),
1244 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1246 variables.push_back(BlockVariableMap());
1248 BlockVariableMap &global_variables = variables.back();
1249 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1251 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1253 if(!i->second.referenced)
1255 unused_nodes.insert(i->first);
1256 clear_assignments(i->second, true);
1259 variables.pop_back();
1262 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1264 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1265 if(i!=aggregates.end())
1266 unused_nodes.erase(i->second);
1268 if(var.declaration && !assignment_target)
1270 VariableInfo &var_info = variables.back()[var.declaration];
1271 var_info.assignments.clear();
1272 var_info.referenced = true;
1276 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1278 TraversingVisitor::visit(memacc);
1279 unused_nodes.erase(memacc.declaration);
1282 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1284 if(binary.oper=="[")
1286 binary.left->visit(*this);
1287 SetForScope<bool> set(assignment_target, false);
1288 binary.right->visit(*this);
1291 TraversingVisitor::visit(binary);
1294 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1297 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1298 assign.left->visit(*this);
1300 assign.right->visit(*this);
1301 assignment = &assign;
1304 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1306 VariableInfo &var_info = variables.back()[&var];
1308 clear_assignments(var_info, true);
1309 var_info.assignments.push_back(&node);
1310 var_info.conditionally_assigned = false;
1313 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1317 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1318 unused_nodes.insert(*i);
1320 var_info.assignments.clear();
1323 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1326 TraversingVisitor::visit(expr);
1327 if(assignment && assignment->target_declaration)
1328 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1331 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1333 SetForScope<Node *> set(aggregate, &strct);
1334 unused_nodes.insert(&strct);
1335 TraversingVisitor::visit(strct);
1338 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1341 aggregates[&var] = aggregate;
1344 variables.back()[&var].local = true;
1345 if(var.init_expression)
1346 record_assignment(var, *var.init_expression, false);
1348 unused_nodes.erase(var.type_declaration);
1349 TraversingVisitor::visit(var);
1352 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1354 SetForScope<Node *> set(aggregate, &iface);
1355 unused_nodes.insert(&iface);
1356 TraversingVisitor::visit(iface);
1359 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1361 variables.push_back(BlockVariableMap());
1364 SetForScope<bool> set(global_scope, false);
1365 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1367 func.body.visit(*this);
1370 BlockVariableMap &block_variables = variables.back();
1371 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1372 i->second.conditionally_assigned = true;
1373 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1374 block_variables[i->get()].referenced = true;
1375 merge_down_variables();
1378 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1380 BlockVariableMap &parent_variables = variables[variables.size()-2];
1381 BlockVariableMap &block_variables = variables.back();
1382 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1386 if(!i->second.referenced)
1387 unused_nodes.insert(i->first);
1388 clear_assignments(i->second, true);
1392 BlockVariableMap::iterator j = parent_variables.find(i->first);
1393 if(j==parent_variables.end())
1394 parent_variables.insert(*i);
1397 if(i->second.referenced || !i->second.conditionally_assigned)
1398 clear_assignments(j->second, !i->second.referenced);
1399 j->second.conditionally_assigned = i->second.conditionally_assigned;
1400 j->second.referenced |= i->second.referenced;
1401 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1404 variables.pop_back();
1407 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1409 cond.condition->visit(*this);
1410 variables.push_back(BlockVariableMap());
1411 cond.body.visit(*this);
1413 BlockVariableMap if_variables;
1414 swap(variables.back(), if_variables);
1415 cond.else_body.visit(*this);
1417 BlockVariableMap &else_variables = variables.back();
1418 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1420 BlockVariableMap::iterator j = if_variables.find(i->first);
1421 if(j!=if_variables.end())
1423 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1424 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1425 if_variables.erase(j);
1428 i->second.conditionally_assigned = true;
1431 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1433 i->second.conditionally_assigned = true;
1434 else_variables.insert(*i);
1437 merge_down_variables();
1440 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1442 variables.push_back(BlockVariableMap());
1443 TraversingVisitor::visit(iter);
1445 BlockVariableMap &block_variables = variables.back();
1446 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1447 if(!i->second.local && i->second.referenced)
1448 i->second.assignments.clear();
1450 merge_down_variables();
1454 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1456 conditionally_assigned(false),
1461 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1463 TraversingVisitor::visit(call);
1465 unused_nodes.erase(call.declaration);
1466 if(call.declaration && call.declaration->definition!=call.declaration)
1467 used_definitions.insert(call.declaration->definition);
1470 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1472 TraversingVisitor::visit(func);
1474 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1475 unused_nodes.insert(&func);
1479 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1483 void ProgramCompiler::NodeRemover::visit(Block &block)
1485 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1488 if(to_remove.count(i->get()))
1489 block.body.erase(i++);
1495 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1497 if(to_remove.count(&var))
1499 stage->in_variables.erase(var.name);
1500 stage->out_variables.erase(var.name);
1501 stage->locations.erase(var.name);
1502 if(var.linked_declaration)
1503 var.linked_declaration->linked_declaration = 0;
1505 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1506 var.init_expression = 0;
1510 ProgramCompiler::LegacyConverter::LegacyConverter():
1511 target_api(get_gl_api()),
1512 target_version(get_glsl_version()),
1516 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1517 target_api(get_gl_api()),
1522 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1524 if(target_version<feature_version)
1526 else if(stage->required_version<feature_version)
1527 stage->required_version = feature_version;
1532 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1534 if(target_api==OPENGL_ES2)
1535 return check_version(Version(3, 0));
1537 return check_version(Version(1, 30));
1540 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1542 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1544 var.name = "gl_FragColor";
1545 var.declaration = 0;
1548 else if(var.declaration)
1549 type = var.declaration->type;
1554 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1556 TraversingVisitor::visit(assign);
1557 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1558 assign.target_declaration = 0;
1561 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1563 if(target_api==OPENGL_ES2)
1564 return check_version(Version(3, 0));
1566 return check_version(Version(1, 30));
1569 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1571 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1573 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1574 if(i!=call.arguments.end())
1577 if(type=="sampler1D")
1578 call.name = "texture1D";
1579 else if(type=="sampler2D")
1580 call.name = "texture2D";
1581 else if(type=="sampler3D")
1582 call.name = "texture3D";
1583 else if(type=="sampler1DShadow")
1584 call.name = "shadow1D";
1585 else if(type=="sampler2DShadow")
1586 call.name = "shadow2D";
1588 for(; i!=call.arguments.end(); ++i)
1593 TraversingVisitor::visit(call);
1596 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1598 if(target_api==OPENGL_ES2)
1599 return check_version(Version(3, 0));
1601 return check_version(Version(3, 30));
1604 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1606 if(var.layout && !supports_interface_layouts())
1608 vector<Layout::Qualifier>::iterator i;
1609 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1610 if(i!=var.layout->qualifiers.end())
1612 unsigned location = lexical_cast<unsigned>(i->value);
1613 if(stage->type==VERTEX && var.interface=="in")
1615 stage->locations[var.name] = location;
1616 var.layout->qualifiers.erase(i);
1618 else if(stage->type==FRAGMENT && var.interface=="out")
1620 stage->locations[var.name] = location;
1621 var.layout->qualifiers.erase(i);
1624 if(var.layout->qualifiers.empty())
1629 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1631 if(stage->type==FRAGMENT && var.interface=="out")
1638 TraversingVisitor::visit(var);
1641 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1643 if(target_api==OPENGL_ES2)
1645 if(iface=="uniform")
1646 return check_version(Version(3, 0));
1648 return check_version(Version(3, 20));
1651 return check_version(Version(1, 50));
1654 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1656 if(!supports_interface_blocks(iface.interface))
1657 flatten_block(iface.members);