1 #include <msp/core/raii.h>
2 #include <msp/gl/extensions/ext_gpu_shader4.h>
3 #include <msp/strings/format.h>
4 #include <msp/strings/utils.h>
7 #include "programcompiler.h"
15 const char builtins_src[] =
16 "#pragma MSP stage(vertex)\n"
17 "out gl_PerVertex {\n"
18 " vec4 gl_Position;\n"
19 " float gl_ClipDistance[];\n"
21 "#pragma MSP stage(geometry)\n"
23 " vec4 gl_Position;\n"
24 " float gl_ClipDistance[];\n"
26 "out gl_PerVertex {\n"
27 " vec4 gl_Position;\n"
28 " float gl_ClipDistance[];\n"
36 using namespace ProgramSyntax;
38 // XXX For some reason global declarations are emitted for otherwise undeclared local variables
40 ProgramCompiler::ProgramCompiler():
45 ProgramCompiler::~ProgramCompiler()
50 void ProgramCompiler::compile(const string &source, const string &src_name)
54 module = new Module();
56 imported_names.insert(src_name);
57 append_module(parser.parse(source, src_name));
61 void ProgramCompiler::compile(IO::Base &io, Resources *res, const string &src_name)
65 module = new Module();
67 imported_names.insert(src_name);
68 append_module(parser.parse(io, src_name));
72 void ProgramCompiler::compile(IO::Base &io, const string &src_name)
74 compile(io, 0, src_name);
77 void ProgramCompiler::add_shaders(Program &program)
80 throw invalid_operation("ProgramCompiler::add_shaders");
82 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
86 program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
87 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
88 program.bind_attribute(j->second, j->first);
90 else if(i->type==GEOMETRY)
91 program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
92 else if(i->type==FRAGMENT)
94 program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
97 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
98 program.bind_fragment_data(j->second, j->first);
104 Module *ProgramCompiler::create_builtins_module()
106 ProgramParser parser;
107 Module *module = new Module(parser.parse(builtins_src, "<builtin>"));
108 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
110 VariableResolver resolver;
111 i->content.visit(resolver);
112 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
113 j->second->linked_declaration = j->second;
118 Module &ProgramCompiler::get_builtins_module()
120 static RefPtr<Module> builtins_module = create_builtins_module();
121 return *builtins_module;
124 Stage *ProgramCompiler::get_builtins(StageType type)
126 Module &module = get_builtins_module();
127 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
133 void ProgramCompiler::append_module(ProgramSyntax::Module &mod)
135 vector<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
136 for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
137 import((*i)->module);
138 apply<NodeRemover>(mod.shared, set<Node *>(imports.begin(), imports.end()));
140 append_stage(mod.shared);
141 for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
145 void ProgramCompiler::append_stage(Stage &stage)
148 if(stage.type==SHARED)
149 target = &module->shared;
152 list<Stage>::iterator i;
153 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
154 if(i==module->stages.end() || i->type>stage.type)
156 list<Stage>::iterator j = module->stages.insert(i, stage.type);
157 if(i!=module->stages.end())
160 if(i!=module->stages.begin())
167 for(NodeList<Node>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
168 target->content.body.push_back(*i);
169 apply<DeclarationCombiner>(*target);
172 void ProgramCompiler::process()
174 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
176 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
179 i = module->stages.begin();
183 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
187 void ProgramCompiler::import(const string &name)
189 string fn = name+".glsl";
190 if(imported_names.count(fn))
192 imported_names.insert(fn);
194 RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
196 throw runtime_error(format("module %s not found", name));
197 ProgramParser import_parser;
198 append_module(import_parser.parse(*io, fn));
201 void ProgramCompiler::generate(Stage &stage)
203 inject_block(stage.content, module->shared.content);
205 apply<DeclarationReorderer>(stage);
206 apply<FunctionResolver>(stage);
207 apply<VariableResolver>(stage);
208 apply<InterfaceGenerator>(stage);
209 apply<VariableResolver>(stage);
210 apply<DeclarationReorderer>(stage);
211 apply<LegacyConverter>(stage);
214 bool ProgramCompiler::optimize(Stage &stage)
216 apply<ConstantConditionEliminator>(stage);
218 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
219 apply<FunctionInliner>(stage, inlineable);
221 set<Node *> unused = apply<UnusedVariableLocator>(stage);
222 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
223 unused.insert(unused2.begin(), unused2.end());
224 apply<NodeRemover>(stage, unused);
226 return !unused.empty();
229 void ProgramCompiler::finalize(Stage &stage)
231 if(get_gl_api()==OPENGL_ES2)
232 apply<DefaultPrecisionGenerator>(stage);
234 apply<PrecisionRemover>(stage);
237 void ProgramCompiler::inject_block(Block &target, const Block &source)
239 list<RefPtr<Node> >::iterator insert_point = target.body.begin();
240 for(list<RefPtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
241 target.body.insert(insert_point, (*i)->clone());
245 typename T::ResultType ProgramCompiler::apply(Stage &stage)
248 visitor.apply(stage);
249 return visitor.get_result();
252 template<typename T, typename A>
253 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
256 visitor.apply(stage);
257 return visitor.get_result();
261 ProgramCompiler::Visitor::Visitor():
265 void ProgramCompiler::Visitor::apply(Stage &s)
267 SetForScope<Stage *> set(stage, &s);
268 stage->content.visit(*this);
272 ProgramCompiler::BlockModifier::BlockModifier():
276 void ProgramCompiler::BlockModifier::flatten_block(Block &block)
278 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
282 void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
284 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
285 insert_nodes.clear();
288 block.body.erase(i++);
294 void ProgramCompiler::BlockModifier::visit(Block &block)
296 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
299 apply_and_increment(block, i);
304 ProgramCompiler::Formatter::Formatter():
306 parameter_list(false),
310 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
312 GLApi api = get_gl_api();
313 const Version &ver = s.required_version;
317 formatted += format("#version %d%02d", ver.major, ver.minor);
318 if(api==OPENGL_ES2 && ver>=Version(3, 0))
326 void ProgramCompiler::Formatter::visit(Literal &literal)
328 formatted += literal.token;
331 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
334 parexpr.expression->visit(*this);
338 void ProgramCompiler::Formatter::visit(VariableReference &var)
340 formatted += var.name;
343 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
345 memacc.left->visit(*this);
346 formatted += format(".%s", memacc.member);
349 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
352 formatted += unary.oper;
353 unary.expression->visit(*this);
355 formatted += unary.oper;
358 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
360 binary.left->visit(*this);
361 formatted += binary.oper;
362 binary.right->visit(*this);
363 formatted += binary.after;
366 void ProgramCompiler::Formatter::visit(Assignment &assign)
368 assign.left->visit(*this);
369 formatted += format(" %s ", assign.oper);
370 assign.right->visit(*this);
373 void ProgramCompiler::Formatter::visit(FunctionCall &call)
375 formatted += format("%s(", call.name);
376 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
378 if(i!=call.arguments.begin())
385 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
387 expr.expression->visit(*this);
391 void ProgramCompiler::Formatter::visit(Block &block)
396 unsigned brace_indent = indent;
397 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
399 formatted += format("%s{\n", string(brace_indent*2, ' '));
401 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
402 string spaces(indent*2, ' ');
403 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
405 if(i!=block.body.begin())
413 formatted += format("\n%s}", string(brace_indent*2, ' '));
416 void ProgramCompiler::Formatter::visit(Import &import)
418 formatted += format("import %s;", import.module);
421 void ProgramCompiler::Formatter::visit(Precision &prec)
423 formatted += format("precision %s %s;", prec.precision, prec.type);
426 void ProgramCompiler::Formatter::visit(Layout &layout)
428 formatted += "layout(";
429 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
431 if(i!=layout.qualifiers.begin())
433 formatted += i->identifier;
434 if(!i->value.empty())
435 formatted += format("=%s", i->value);
440 void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
442 layout.layout.visit(*this);
443 formatted += format(" %s;", layout.interface);
446 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
448 formatted += format("struct %s\n", strct.name);
449 strct.members.visit(*this);
453 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
457 var.layout->visit(*this);
461 formatted += "const ";
462 if(!var.sampling.empty())
463 formatted += format("%s ", var.sampling);
464 if(!var.interface.empty() && var.interface!=block_interface)
466 string interface = var.interface;
467 if(stage->required_version<Version(1, 30))
469 if(stage->type==VERTEX && var.interface=="in")
470 interface = "attribute";
471 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
472 interface = "varying";
474 formatted += format("%s ", interface);
476 if(!var.precision.empty())
477 formatted += format("%s ", var.precision);
478 formatted += format("%s %s", var.type, var.name);
483 var.array_size->visit(*this);
486 if(var.init_expression)
489 var.init_expression->visit(*this);
495 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
497 SetForScope<string> set(block_interface, iface.interface);
498 formatted += format("%s %s\n", iface.interface, iface.name);
499 iface.members.visit(*this);
503 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
505 formatted += format("%s %s(", func.return_type, func.name);
506 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
508 if(i!=func.parameters.begin())
510 SetFlag set(parameter_list);
514 if(func.definition==&func)
517 func.body.visit(*this);
523 void ProgramCompiler::Formatter::visit(Conditional &cond)
526 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
531 cond.condition->visit(*this);
534 cond.body.visit(*this);
535 if(!cond.else_body.body.empty())
537 formatted += format("\n%selse\n", string(indent*2, ' '));
538 SetForScope<unsigned> set(else_if, 2);
539 cond.else_body.visit(*this);
543 void ProgramCompiler::Formatter::visit(Iteration &iter)
546 iter.init_statement->visit(*this);
548 iter.condition->visit(*this);
550 iter.loop_expression->visit(*this);
552 iter.body.visit(*this);
555 void ProgramCompiler::Formatter::visit(Return &ret)
557 formatted += "return ";
558 ret.expression->visit(*this);
562 void ProgramCompiler::Formatter::visit(Jump &jump)
564 formatted += jump.keyword;
569 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
573 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
578 SetForScope<bool> set(toplevel, false);
579 BlockModifier::visit(block);
582 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
584 vector<FunctionDeclaration *> &decls = functions[func.name];
587 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
589 (*i)->definition = func.definition;
590 (*i)->body.body.clear();
593 decls.push_back(&func);
596 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
598 VariableDeclaration *&ptr = variables[var.name];
601 ptr->type = var.type;
602 if(var.init_expression)
603 ptr->init_expression = var.init_expression;
611 ProgramCompiler::VariableResolver::VariableResolver():
613 record_target(false),
614 assignment_target(0),
615 self_referencing(false)
618 void ProgramCompiler::VariableResolver::apply(Stage &s)
620 SetForScope<Stage *> set(stage, &s);
621 Stage *builtins = get_builtins(stage->type);
623 blocks.push_back(&builtins->content);
624 stage->content.visit(*this);
629 void ProgramCompiler::VariableResolver::visit(Block &block)
631 blocks.push_back(&block);
632 block.variables.clear();
633 TraversingVisitor::visit(block);
637 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
641 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
644 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
645 if(j!=(*i)->variables.end())
647 var.declaration = j->second;
648 type = j->second->type_declaration;
655 if(assignment_target)
657 record_target = false;
658 assignment_target = 0;
661 assignment_target = var.declaration;
663 else if(var.declaration && var.declaration==assignment_target)
664 self_referencing = true;
667 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
670 TraversingVisitor::visit(memacc);
671 memacc.declaration = 0;
674 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
675 if(i!=type->members.variables.end())
677 memacc.declaration = i->second;
678 type = i->second->type_declaration;
685 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
690 SetForScope<bool> set(record_target, false);
691 binary.right->visit(*this);
694 binary.left->visit(*this);
698 TraversingVisitor::visit(binary);
703 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
706 SetFlag set(record_target);
707 assignment_target = 0;
708 assign.left->visit(*this);
711 self_referencing = false;
712 assign.right->visit(*this);
714 assign.self_referencing = (self_referencing || assign.oper!="=");
715 assign.target_declaration = assignment_target;
718 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
720 TraversingVisitor::visit(strct);
721 blocks.back()->types[strct.name] = &strct;
724 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
726 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
729 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
730 if(j!=(*i)->types.end())
731 var.type_declaration = j->second;
734 if(!block_interface.empty() && var.interface.empty())
735 var.interface = block_interface;
737 TraversingVisitor::visit(var);
738 blocks.back()->variables[var.name] = &var;
739 if(anonymous && blocks.size()>1)
740 blocks[blocks.size()-2]->variables[var.name] = &var;
743 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
745 SetFlag set(anonymous);
746 SetForScope<string> set2(block_interface, iface.interface);
747 TraversingVisitor::visit(iface);
751 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
753 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
754 if(i!=functions.end())
755 call.declaration = i->second.back();
757 TraversingVisitor::visit(call);
760 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
762 vector<FunctionDeclaration *> &decls = functions[func.name];
765 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
766 (*i)->definition = func.definition;
768 decls.push_back(&func);
770 else if(!decls.empty() && decls.back()->definition)
771 func.definition = decls.back()->definition;
773 decls.push_back(&func);
775 TraversingVisitor::visit(func);
779 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
783 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
787 else if(type==GEOMETRY)
793 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
795 SetForScope<Stage *> set(stage, &s);
797 in_prefix = get_out_prefix(stage->previous->type);
798 out_prefix = get_out_prefix(stage->type);
799 stage->content.visit(*this);
802 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
804 SetForScope<unsigned> set(scope_level, scope_level+1);
805 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
811 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
813 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
816 iface_declarations.clear();
819 apply_and_increment(block, i);
823 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
825 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
826 return prefix+name.substr(offset);
829 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
831 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
832 if(stage_vars.count(name) || iface_declarations.count(name))
835 VariableDeclaration* iface_var = new VariableDeclaration;
836 iface_var->sampling = var.sampling;
837 iface_var->interface = iface;
838 iface_var->type = var.type;
839 iface_var->type_declaration = var.type_declaration;
840 iface_var->name = name;
841 if(stage->type==GEOMETRY)
842 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
844 iface_var->array = var.array;
846 iface_var->array_size = var.array_size;
848 iface_var->linked_declaration = &var;
849 iface_declarations[name] = iface_var;
854 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
856 Assignment *assign = new Assignment;
857 VariableReference *ref = new VariableReference;
861 assign->right = right;
863 ExpressionStatement *stmt = new ExpressionStatement;
864 stmt->expression = assign;
866 insert_nodes.push_back(stmt);
869 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
871 if(var.declaration || !stage->previous)
873 if(iface_declarations.count(var.name))
876 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
877 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
878 if(i==prev_out.end())
879 i = prev_out.find(in_prefix+var.name);
880 if(i!=prev_out.end())
882 generate_interface(*i->second, "in", i->second->name);
883 var.name = i->second->name;
887 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
889 if(var.interface=="out")
892 stage->out_variables[var.name] = &var;
893 else if(generate_interface(var, "out", change_prefix(var.name, string())))
896 if(var.init_expression)
898 insert_assignment(var.name, var.init_expression->clone());
903 else if(var.interface=="in")
905 stage->in_variables[var.name] = &var;
906 if(var.linked_declaration)
907 var.linked_declaration->linked_declaration = &var;
908 else if(stage->previous)
910 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
911 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
912 if(i!=prev_out.end())
914 var.linked_declaration = i->second;
915 i->second->linked_declaration = &var;
920 TraversingVisitor::visit(var);
923 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
925 vector<VariableDeclaration *> pass_vars;
927 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
928 pass_vars.push_back(i->second);
929 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
930 if(i->second->interface=="in")
931 pass_vars.push_back(i->second.get());
935 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
936 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
939 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
940 linked = ((*j)->linked_declaration==i->second);
942 if(!linked && generate_interface(*i->second, "in", i->second->name))
943 pass_vars.push_back(i->second);
947 if(stage->type==GEOMETRY)
949 VariableReference *ref = new VariableReference;
952 BinaryExpression *subscript = new BinaryExpression;
953 subscript->left = ref;
954 subscript->oper = "[";
955 subscript->right = pass.subscript;
956 subscript->after = "]";
958 MemberAccess *memacc = new MemberAccess;
959 memacc->left = subscript;
960 memacc->member = "gl_Position";
962 insert_assignment("gl_Position", memacc);
965 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
967 string out_name = change_prefix((*i)->name, out_prefix);
968 generate_interface(**i, "out", out_name);
970 VariableReference *ref = new VariableReference;
971 ref->name = (*i)->name;
974 BinaryExpression *subscript = new BinaryExpression;
975 subscript->left = ref;
976 subscript->oper = "[";
977 subscript->right = pass.subscript;
978 subscript->after = "]";
979 insert_assignment(out_name, subscript);
982 insert_assignment(out_name, ref);
989 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
993 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
995 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
996 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
998 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1000 kind = NO_DECLARATION;
1004 if(kind==STRUCT && struct_insert_point!=block.body.end())
1006 block.body.insert(struct_insert_point, *i);
1009 else if(kind>STRUCT && struct_insert_point==block.body.end())
1010 struct_insert_point = i;
1012 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1014 block.body.insert(variable_insert_point, *i);
1017 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1018 variable_insert_point = i;
1021 block.body.erase(i++);
1028 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1032 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1034 FunctionDeclaration *def = call.declaration;
1035 if(def && def->definition!=def)
1036 def = def->definition;
1040 unsigned &count = refcounts[def];
1042 if(count>1 || def==in_function)
1043 inlineable.erase(def);
1046 TraversingVisitor::visit(call);
1049 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1051 unsigned &count = refcounts[func.definition];
1052 if(!count && func.parameters.empty())
1053 inlineable.insert(func.definition);
1055 SetForScope<FunctionDeclaration *> set(in_function, &func);
1056 TraversingVisitor::visit(func);
1060 ProgramCompiler::FunctionInliner::FunctionInliner():
1064 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1069 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1074 ptr = inline_result;
1077 void ProgramCompiler::FunctionInliner::visit(Block &block)
1082 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1090 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1092 visit_and_inline(unary.expression);
1096 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1098 visit_and_inline(binary.left);
1099 visit_and_inline(binary.right);
1103 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1105 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1106 visit_and_inline(*i);
1108 FunctionDeclaration *def = call.declaration;
1109 if(def && def->definition!=def)
1110 def = def->definition;
1112 if(def && inlineable.count(def))
1121 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1123 TraversingVisitor::visit(ret);
1126 inline_result = ret.expression->clone();
1130 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1136 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1137 variable_values(&v),
1142 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1144 if(literal.token=="true")
1146 else if(literal.token=="false")
1149 result = lexical_cast<float>(literal.token);
1150 result_valid = true;
1153 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1155 parexp.expression->visit(*this);
1158 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1160 if(!var.declaration)
1165 ValueMap::const_iterator i = variable_values->find(var.declaration);
1166 if(i!=variable_values->end())
1167 i->second->visit(*this);
1169 else if(var.declaration->init_expression)
1170 var.declaration->init_expression->visit(*this);
1173 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1175 result_valid = false;
1176 unary.expression->visit(*this);
1183 result_valid = false;
1186 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1188 result_valid = false;
1189 binary.left->visit(*this);
1193 float left_result = result;
1194 result_valid = false;
1195 binary.right->visit(*this);
1199 if(binary.oper=="<")
1200 result = (left_result<result);
1201 else if(binary.oper=="<=")
1202 result = (left_result<=result);
1203 else if(binary.oper==">")
1204 result = (left_result>result);
1205 else 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);
1216 result_valid = false;
1220 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1224 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1226 SetForScope<unsigned> set(scope_level, scope_level+1);
1227 BlockModifier::visit(block);
1229 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1230 variable_values.erase(i->second);
1233 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1235 variable_values.erase(assign.target_declaration);
1238 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1240 if(var.constant || scope_level>1)
1241 variable_values[&var] = var.init_expression.get();
1244 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1246 ExpressionEvaluator eval(variable_values);
1247 cond.condition->visit(eval);
1248 if(eval.result_valid)
1249 flatten_block(eval.result ? cond.body : cond.else_body);
1251 TraversingVisitor::visit(cond);
1254 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1258 ExpressionEvaluator eval;
1259 iter.condition->visit(eval);
1260 if(eval.result_valid && !eval.result)
1267 TraversingVisitor::visit(iter);
1271 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1274 assignment_target(false),
1278 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1280 variables.push_back(BlockVariableMap());
1282 BlockVariableMap &global_variables = variables.back();
1283 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1285 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1287 if(!i->second.referenced)
1289 unused_nodes.insert(i->first);
1290 clear_assignments(i->second, true);
1293 variables.pop_back();
1296 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1298 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1299 if(i!=aggregates.end())
1300 unused_nodes.erase(i->second);
1302 if(var.declaration && !assignment_target)
1304 VariableInfo &var_info = variables.back()[var.declaration];
1305 var_info.assignments.clear();
1306 var_info.referenced = true;
1310 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1312 TraversingVisitor::visit(memacc);
1313 unused_nodes.erase(memacc.declaration);
1316 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1318 if(binary.oper=="[")
1320 binary.left->visit(*this);
1321 SetForScope<bool> set(assignment_target, false);
1322 binary.right->visit(*this);
1325 TraversingVisitor::visit(binary);
1328 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1331 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1332 assign.left->visit(*this);
1334 assign.right->visit(*this);
1335 assignment = &assign;
1338 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1340 VariableInfo &var_info = variables.back()[&var];
1342 clear_assignments(var_info, true);
1343 var_info.assignments.push_back(&node);
1344 var_info.conditionally_assigned = false;
1347 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1351 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1352 unused_nodes.insert(*i);
1354 var_info.assignments.clear();
1357 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1360 TraversingVisitor::visit(expr);
1361 if(assignment && assignment->target_declaration)
1362 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1365 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1367 SetForScope<Node *> set(aggregate, &strct);
1368 unused_nodes.insert(&strct);
1369 TraversingVisitor::visit(strct);
1372 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1375 aggregates[&var] = aggregate;
1378 variables.back()[&var].local = true;
1379 if(var.init_expression)
1380 record_assignment(var, *var.init_expression, false);
1382 unused_nodes.erase(var.type_declaration);
1383 TraversingVisitor::visit(var);
1386 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1388 SetForScope<Node *> set(aggregate, &iface);
1389 unused_nodes.insert(&iface);
1390 TraversingVisitor::visit(iface);
1393 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1395 variables.push_back(BlockVariableMap());
1398 SetForScope<bool> set(global_scope, false);
1399 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1401 func.body.visit(*this);
1404 BlockVariableMap &block_variables = variables.back();
1405 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1406 i->second.conditionally_assigned = true;
1407 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1408 block_variables[i->get()].referenced = true;
1409 merge_down_variables();
1412 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1414 BlockVariableMap &parent_variables = variables[variables.size()-2];
1415 BlockVariableMap &block_variables = variables.back();
1416 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1420 if(!i->second.referenced)
1421 unused_nodes.insert(i->first);
1422 clear_assignments(i->second, true);
1426 BlockVariableMap::iterator j = parent_variables.find(i->first);
1427 if(j==parent_variables.end())
1428 parent_variables.insert(*i);
1431 if(i->second.referenced || !i->second.conditionally_assigned)
1432 clear_assignments(j->second, !i->second.referenced);
1433 j->second.conditionally_assigned = i->second.conditionally_assigned;
1434 j->second.referenced |= i->second.referenced;
1435 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1438 variables.pop_back();
1441 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1443 cond.condition->visit(*this);
1444 variables.push_back(BlockVariableMap());
1445 cond.body.visit(*this);
1447 BlockVariableMap if_variables;
1448 swap(variables.back(), if_variables);
1449 cond.else_body.visit(*this);
1451 BlockVariableMap &else_variables = variables.back();
1452 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1454 BlockVariableMap::iterator j = if_variables.find(i->first);
1455 if(j!=if_variables.end())
1457 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1458 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1459 if_variables.erase(j);
1462 i->second.conditionally_assigned = true;
1465 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1467 i->second.conditionally_assigned = true;
1468 else_variables.insert(*i);
1471 merge_down_variables();
1474 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1476 variables.push_back(BlockVariableMap());
1477 TraversingVisitor::visit(iter);
1479 BlockVariableMap &block_variables = variables.back();
1480 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1481 if(!i->second.local && i->second.referenced)
1482 i->second.assignments.clear();
1484 merge_down_variables();
1488 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1490 conditionally_assigned(false),
1495 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1497 TraversingVisitor::visit(call);
1499 unused_nodes.erase(call.declaration);
1500 if(call.declaration && call.declaration->definition!=call.declaration)
1501 used_definitions.insert(call.declaration->definition);
1504 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1506 TraversingVisitor::visit(func);
1508 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1509 unused_nodes.insert(&func);
1513 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1517 void ProgramCompiler::NodeRemover::visit(Block &block)
1519 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1522 if(to_remove.count(i->get()))
1523 block.body.erase(i++);
1529 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1531 if(to_remove.count(&var))
1533 stage->in_variables.erase(var.name);
1534 stage->out_variables.erase(var.name);
1535 stage->locations.erase(var.name);
1536 if(var.linked_declaration)
1537 var.linked_declaration->linked_declaration = 0;
1539 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1540 var.init_expression = 0;
1544 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1549 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1551 var.precision.clear();
1555 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1559 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1563 SetForScope<bool> set(toplevel, false);
1564 BlockModifier::visit(block);
1567 Visitor::visit(block);
1570 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1572 have_default.insert(prec.type);
1575 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1577 if(var.type_declaration)
1580 string type = var.type;
1581 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1583 else if(!type.compare(0, 3, "ivec") || type=="uint")
1586 if(!have_default.count(type))
1588 Precision *prec = new Precision;
1589 if(!type.compare(0, 7, "sampler"))
1590 prec->precision = "lowp";
1591 else if(stage->type==FRAGMENT)
1592 prec->precision = "mediump";
1594 prec->precision = "highp";
1596 insert_nodes.push_back(prec);
1598 have_default.insert(type);
1603 ProgramCompiler::LegacyConverter::LegacyConverter():
1604 target_api(get_gl_api()),
1605 target_version(get_glsl_version()),
1609 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1610 target_api(get_gl_api()),
1615 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1617 if(target_version<feature_version)
1619 else if(stage->required_version<feature_version)
1620 stage->required_version = feature_version;
1625 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1627 if(target_api==OPENGL_ES2)
1628 return check_version(Version(3, 0));
1630 return check_version(Version(1, 30));
1633 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1635 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1637 var.name = "gl_FragColor";
1638 var.declaration = 0;
1641 else if(var.declaration)
1642 type = var.declaration->type;
1647 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1649 TraversingVisitor::visit(assign);
1650 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1651 assign.target_declaration = 0;
1654 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1656 if(target_api==OPENGL_ES2)
1657 return check_version(Version(3, 0));
1659 return check_version(Version(1, 30));
1662 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1664 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1666 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1667 if(i!=call.arguments.end())
1670 if(type=="sampler1D")
1671 call.name = "texture1D";
1672 else if(type=="sampler2D")
1673 call.name = "texture2D";
1674 else if(type=="sampler3D")
1675 call.name = "texture3D";
1676 else if(type=="sampler1DShadow")
1677 call.name = "shadow1D";
1678 else if(type=="sampler2DShadow")
1679 call.name = "shadow2D";
1681 for(; i!=call.arguments.end(); ++i)
1686 TraversingVisitor::visit(call);
1689 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1691 if(target_api==OPENGL_ES2)
1692 return check_version(Version(3, 0));
1694 return check_version(Version(3, 30));
1697 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1699 if(var.layout && !supports_interface_layouts())
1701 vector<Layout::Qualifier>::iterator i;
1702 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1703 if(i!=var.layout->qualifiers.end())
1705 unsigned location = lexical_cast<unsigned>(i->value);
1706 if(stage->type==VERTEX && var.interface=="in")
1708 stage->locations[var.name] = location;
1709 var.layout->qualifiers.erase(i);
1711 else if(stage->type==FRAGMENT && var.interface=="out")
1714 static Require _req(EXT_gpu_shader4);
1715 stage->locations[var.name] = location;
1716 var.layout->qualifiers.erase(i);
1719 if(var.layout->qualifiers.empty())
1724 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1726 if(stage->type==FRAGMENT && var.interface=="out")
1733 TraversingVisitor::visit(var);
1736 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1738 if(target_api==OPENGL_ES2)
1740 if(iface=="uniform")
1741 return check_version(Version(3, 0));
1743 return check_version(Version(3, 20));
1746 return check_version(Version(1, 50));
1749 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1751 if(!supports_interface_blocks(iface.interface))
1752 flatten_block(iface.members);