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<DeclarationReorderer>(stage);
209 apply<LegacyConverter>(stage);
212 bool ProgramCompiler::optimize(Stage &stage)
214 apply<ConstantConditionEliminator>(stage);
216 set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
217 apply<FunctionInliner>(stage, inlineable);
219 set<Node *> unused = apply<UnusedVariableLocator>(stage);
220 set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
221 unused.insert(unused2.begin(), unused2.end());
222 apply<NodeRemover>(stage, unused);
224 return !unused.empty();
227 void ProgramCompiler::finalize(Stage &stage)
229 if(get_gl_api()==OPENGL_ES2)
230 apply<DefaultPrecisionGenerator>(stage);
232 apply<PrecisionRemover>(stage);
235 void ProgramCompiler::inject_block(Block &target, const Block &source)
237 list<RefPtr<Node> >::iterator insert_point = target.body.begin();
238 for(list<RefPtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
239 target.body.insert(insert_point, (*i)->clone());
243 typename T::ResultType ProgramCompiler::apply(Stage &stage)
246 visitor.apply(stage);
247 return visitor.get_result();
250 template<typename T, typename A>
251 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
254 visitor.apply(stage);
255 return visitor.get_result();
259 ProgramCompiler::Visitor::Visitor():
263 void ProgramCompiler::Visitor::apply(Stage &s)
265 SetForScope<Stage *> set(stage, &s);
266 stage->content.visit(*this);
270 ProgramCompiler::BlockModifier::BlockModifier():
274 void ProgramCompiler::BlockModifier::flatten_block(Block &block)
276 insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
280 void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
282 block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
283 insert_nodes.clear();
286 block.body.erase(i++);
292 void ProgramCompiler::BlockModifier::visit(Block &block)
294 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
297 apply_and_increment(block, i);
302 ProgramCompiler::Formatter::Formatter():
304 parameter_list(false),
308 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
310 GLApi api = get_gl_api();
311 const Version &ver = s.required_version;
315 formatted += format("#version %d%02d", ver.major, ver.minor);
316 if(api==OPENGL_ES2 && ver>=Version(3, 0))
324 void ProgramCompiler::Formatter::visit(Literal &literal)
326 formatted += literal.token;
329 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
332 parexpr.expression->visit(*this);
336 void ProgramCompiler::Formatter::visit(VariableReference &var)
338 formatted += var.name;
341 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
343 memacc.left->visit(*this);
344 formatted += format(".%s", memacc.member);
347 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
350 formatted += unary.oper;
351 unary.expression->visit(*this);
353 formatted += unary.oper;
356 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
358 binary.left->visit(*this);
359 formatted += binary.oper;
360 binary.right->visit(*this);
361 formatted += binary.after;
364 void ProgramCompiler::Formatter::visit(Assignment &assign)
366 assign.left->visit(*this);
367 formatted += format(" %s ", assign.oper);
368 assign.right->visit(*this);
371 void ProgramCompiler::Formatter::visit(FunctionCall &call)
373 formatted += format("%s(", call.name);
374 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
376 if(i!=call.arguments.begin())
383 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
385 expr.expression->visit(*this);
389 void ProgramCompiler::Formatter::visit(Block &block)
394 unsigned brace_indent = indent;
395 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
397 formatted += format("%s{\n", string(brace_indent*2, ' '));
399 SetForScope<unsigned> set(indent, indent+(indent>0 || use_braces));
400 string spaces(indent*2, ' ');
401 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
403 if(i!=block.body.begin())
411 formatted += format("\n%s}", string(brace_indent*2, ' '));
414 void ProgramCompiler::Formatter::visit(Import &import)
416 formatted += format("import %s;", import.module);
419 void ProgramCompiler::Formatter::visit(Precision &prec)
421 formatted += format("precision %s %s;", prec.precision, prec.type);
424 void ProgramCompiler::Formatter::visit(Layout &layout)
426 formatted += "layout(";
427 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
429 if(i!=layout.qualifiers.begin())
431 formatted += i->identifier;
432 if(!i->value.empty())
433 formatted += format("=%s", i->value);
438 void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
440 layout.layout.visit(*this);
441 formatted += format(" %s;", layout.interface);
444 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
446 formatted += format("struct %s\n", strct.name);
447 strct.members.visit(*this);
451 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
455 var.layout->visit(*this);
459 formatted += "const ";
460 if(!var.sampling.empty())
461 formatted += format("%s ", var.sampling);
462 if(!var.interface.empty() && var.interface!=block_interface)
464 string interface = var.interface;
465 if(stage->required_version<Version(1, 30))
467 if(stage->type==VERTEX && var.interface=="in")
468 interface = "attribute";
469 else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
470 interface = "varying";
472 formatted += format("%s ", interface);
474 if(!var.precision.empty())
475 formatted += format("%s ", var.precision);
476 formatted += format("%s %s", var.type, var.name);
481 var.array_size->visit(*this);
484 if(var.init_expression)
487 var.init_expression->visit(*this);
493 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
495 SetForScope<string> set(block_interface, iface.interface);
496 formatted += format("%s %s\n", iface.interface, iface.name);
497 iface.members.visit(*this);
501 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
503 formatted += format("%s %s(", func.return_type, func.name);
504 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
506 if(i!=func.parameters.begin())
508 SetFlag set(parameter_list);
512 if(func.definition==&func)
515 func.body.visit(*this);
521 void ProgramCompiler::Formatter::visit(Conditional &cond)
524 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
529 cond.condition->visit(*this);
532 cond.body.visit(*this);
533 if(!cond.else_body.body.empty())
535 formatted += format("\n%selse\n", string(indent*2, ' '));
536 SetForScope<unsigned> set(else_if, 2);
537 cond.else_body.visit(*this);
541 void ProgramCompiler::Formatter::visit(Iteration &iter)
544 iter.init_statement->visit(*this);
546 iter.condition->visit(*this);
548 iter.loop_expression->visit(*this);
550 iter.body.visit(*this);
553 void ProgramCompiler::Formatter::visit(Return &ret)
555 formatted += "return ";
556 ret.expression->visit(*this);
560 void ProgramCompiler::Formatter::visit(Jump &jump)
562 formatted += jump.keyword;
567 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
571 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
576 SetForScope<bool> set(toplevel, false);
577 BlockModifier::visit(block);
580 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
582 vector<FunctionDeclaration *> &decls = functions[func.name];
585 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
587 (*i)->definition = func.definition;
588 (*i)->body.body.clear();
591 decls.push_back(&func);
594 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
596 VariableDeclaration *&ptr = variables[var.name];
599 ptr->type = var.type;
600 if(var.init_expression)
601 ptr->init_expression = var.init_expression;
609 ProgramCompiler::VariableResolver::VariableResolver():
611 record_target(false),
612 assignment_target(0),
613 self_referencing(false)
616 void ProgramCompiler::VariableResolver::apply(Stage &s)
618 SetForScope<Stage *> set(stage, &s);
619 Stage *builtins = get_builtins(stage->type);
621 blocks.push_back(&builtins->content);
622 stage->content.visit(*this);
627 void ProgramCompiler::VariableResolver::visit(Block &block)
629 blocks.push_back(&block);
630 block.variables.clear();
631 TraversingVisitor::visit(block);
635 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
639 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
642 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
643 if(j!=(*i)->variables.end())
645 var.declaration = j->second;
646 type = j->second->type_declaration;
653 if(assignment_target)
655 record_target = false;
656 assignment_target = 0;
659 assignment_target = var.declaration;
661 else if(var.declaration && var.declaration==assignment_target)
662 self_referencing = true;
665 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
668 TraversingVisitor::visit(memacc);
669 memacc.declaration = 0;
672 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
673 if(i!=type->members.variables.end())
675 memacc.declaration = i->second;
676 type = i->second->type_declaration;
683 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
688 SetForScope<bool> set(record_target, false);
689 binary.right->visit(*this);
692 binary.left->visit(*this);
696 TraversingVisitor::visit(binary);
701 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
704 SetFlag set(record_target);
705 assignment_target = 0;
706 assign.left->visit(*this);
709 self_referencing = false;
710 assign.right->visit(*this);
712 assign.self_referencing = (self_referencing || assign.oper!="=");
713 assign.target_declaration = assignment_target;
716 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
718 TraversingVisitor::visit(strct);
719 blocks.back()->types[strct.name] = &strct;
722 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
724 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
727 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
728 if(j!=(*i)->types.end())
729 var.type_declaration = j->second;
732 if(!block_interface.empty() && var.interface.empty())
733 var.interface = block_interface;
735 TraversingVisitor::visit(var);
736 blocks.back()->variables[var.name] = &var;
737 if(anonymous && blocks.size()>1)
738 blocks[blocks.size()-2]->variables[var.name] = &var;
741 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
743 SetFlag set(anonymous);
744 SetForScope<string> set2(block_interface, iface.interface);
745 TraversingVisitor::visit(iface);
749 void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
751 map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
752 if(i!=functions.end())
753 call.declaration = i->second.back();
755 TraversingVisitor::visit(call);
758 void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
760 vector<FunctionDeclaration *> &decls = functions[func.name];
763 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
764 (*i)->definition = func.definition;
766 decls.push_back(&func);
768 else if(!decls.empty() && decls.back()->definition)
769 func.definition = decls.back()->definition;
771 decls.push_back(&func);
773 TraversingVisitor::visit(func);
777 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
781 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
785 else if(type==GEOMETRY)
791 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
793 SetForScope<Stage *> set(stage, &s);
795 in_prefix = get_out_prefix(stage->previous->type);
796 out_prefix = get_out_prefix(stage->type);
797 stage->content.visit(*this);
800 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
802 SetForScope<unsigned> set(scope_level, scope_level+1);
803 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
809 for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
811 list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
814 iface_declarations.clear();
817 apply_and_increment(block, i);
821 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
823 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
824 return prefix+name.substr(offset);
827 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
829 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
830 if(stage_vars.count(name) || iface_declarations.count(name))
833 VariableDeclaration* iface_var = new VariableDeclaration;
834 iface_var->sampling = var.sampling;
835 iface_var->interface = iface;
836 iface_var->type = var.type;
837 iface_var->type_declaration = var.type_declaration;
838 iface_var->name = name;
839 if(stage->type==GEOMETRY)
840 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
842 iface_var->array = var.array;
844 iface_var->array_size = var.array_size;
846 iface_var->linked_declaration = &var;
847 iface_declarations[name] = iface_var;
852 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
854 Assignment *assign = new Assignment;
855 VariableReference *ref = new VariableReference;
859 assign->right = right;
861 ExpressionStatement *stmt = new ExpressionStatement;
862 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())
880 generate_interface(*i->second, "in", i->second->name);
881 var.name = i->second->name;
885 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
887 if(var.interface=="out")
890 stage->out_variables[var.name] = &var;
891 else if(generate_interface(var, "out", change_prefix(var.name, string())))
894 if(var.init_expression)
896 insert_assignment(var.name, var.init_expression->clone());
901 else if(var.interface=="in")
903 stage->in_variables[var.name] = &var;
904 if(var.linked_declaration)
905 var.linked_declaration->linked_declaration = &var;
906 else if(stage->previous)
908 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
909 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
910 if(i!=prev_out.end())
912 var.linked_declaration = i->second;
913 i->second->linked_declaration = &var;
918 TraversingVisitor::visit(var);
921 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
923 vector<VariableDeclaration *> pass_vars;
925 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
926 pass_vars.push_back(i->second);
927 for(map<string, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
928 if(i->second->interface=="in")
929 pass_vars.push_back(i->second.get());
933 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
934 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
937 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
938 linked = ((*j)->linked_declaration==i->second);
940 if(!linked && generate_interface(*i->second, "in", i->second->name))
941 pass_vars.push_back(i->second);
945 if(stage->type==GEOMETRY)
947 VariableReference *ref = new VariableReference;
950 BinaryExpression *subscript = new BinaryExpression;
951 subscript->left = ref;
952 subscript->oper = "[";
953 subscript->right = pass.subscript;
954 subscript->after = "]";
956 MemberAccess *memacc = new MemberAccess;
957 memacc->left = subscript;
958 memacc->member = "gl_Position";
960 insert_assignment("gl_Position", memacc);
963 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
965 string out_name = change_prefix((*i)->name, out_prefix);
966 generate_interface(**i, "out", out_name);
968 VariableReference *ref = new VariableReference;
969 ref->name = (*i)->name;
972 BinaryExpression *subscript = new BinaryExpression;
973 subscript->left = ref;
974 subscript->oper = "[";
975 subscript->right = pass.subscript;
976 subscript->after = "]";
977 insert_assignment(out_name, subscript);
980 insert_assignment(out_name, ref);
987 ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
991 void ProgramCompiler::DeclarationReorderer::visit(Block &block)
993 list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
994 list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
996 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
998 kind = NO_DECLARATION;
1002 if(kind==STRUCT && struct_insert_point!=block.body.end())
1004 block.body.insert(struct_insert_point, *i);
1007 else if(kind>STRUCT && struct_insert_point==block.body.end())
1008 struct_insert_point = i;
1010 if(kind==VARIABLE && variable_insert_point!=block.body.end())
1012 block.body.insert(variable_insert_point, *i);
1015 else if(kind>VARIABLE && variable_insert_point==block.body.end())
1016 variable_insert_point = i;
1019 block.body.erase(i++);
1026 ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
1030 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
1032 FunctionDeclaration *def = call.declaration;
1033 if(def && def->definition!=def)
1034 def = def->definition;
1038 unsigned &count = refcounts[def];
1040 if(count>1 || def==in_function)
1041 inlineable.erase(def);
1044 TraversingVisitor::visit(call);
1047 void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
1049 unsigned &count = refcounts[func.definition];
1050 if(!count && func.parameters.empty())
1051 inlineable.insert(func.definition);
1053 SetForScope<FunctionDeclaration *> set(in_function, &func);
1054 TraversingVisitor::visit(func);
1058 ProgramCompiler::FunctionInliner::FunctionInliner():
1062 ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
1067 void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
1072 ptr = inline_result;
1075 void ProgramCompiler::FunctionInliner::visit(Block &block)
1080 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
1088 void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
1090 visit_and_inline(unary.expression);
1094 void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
1096 visit_and_inline(binary.left);
1097 visit_and_inline(binary.right);
1101 void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
1103 for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1104 visit_and_inline(*i);
1106 FunctionDeclaration *def = call.declaration;
1107 if(def && def->definition!=def)
1108 def = def->definition;
1110 if(def && inlineable.count(def))
1119 void ProgramCompiler::FunctionInliner::visit(Return &ret)
1121 TraversingVisitor::visit(ret);
1124 inline_result = ret.expression->clone();
1128 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
1134 ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
1135 variable_values(&v),
1140 void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
1142 if(literal.token=="true")
1144 else if(literal.token=="false")
1147 result = lexical_cast<float>(literal.token);
1148 result_valid = true;
1151 void ProgramCompiler::ExpressionEvaluator::visit(ParenthesizedExpression &parexp)
1153 parexp.expression->visit(*this);
1156 void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
1158 if(!var.declaration)
1163 ValueMap::const_iterator i = variable_values->find(var.declaration);
1164 if(i!=variable_values->end())
1165 i->second->visit(*this);
1167 else if(var.declaration->init_expression)
1168 var.declaration->init_expression->visit(*this);
1171 void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
1173 result_valid = false;
1174 unary.expression->visit(*this);
1181 result_valid = false;
1184 void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
1186 result_valid = false;
1187 binary.left->visit(*this);
1191 float left_result = result;
1192 result_valid = false;
1193 binary.right->visit(*this);
1197 if(binary.oper=="<")
1198 result = (left_result<result);
1199 else 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);
1214 result_valid = false;
1218 ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
1222 void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
1224 SetForScope<unsigned> set(scope_level, scope_level+1);
1225 BlockModifier::visit(block);
1227 for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
1228 variable_values.erase(i->second);
1231 void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
1233 variable_values.erase(assign.target_declaration);
1236 void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
1238 if(var.constant || scope_level>1)
1239 variable_values[&var] = var.init_expression.get();
1242 void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
1244 ExpressionEvaluator eval(variable_values);
1245 cond.condition->visit(eval);
1246 if(eval.result_valid)
1247 flatten_block(eval.result ? cond.body : cond.else_body);
1249 TraversingVisitor::visit(cond);
1252 void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
1256 ExpressionEvaluator eval;
1257 iter.condition->visit(eval);
1258 if(eval.result_valid && !eval.result)
1265 TraversingVisitor::visit(iter);
1269 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
1272 assignment_target(false),
1276 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
1278 variables.push_back(BlockVariableMap());
1280 BlockVariableMap &global_variables = variables.back();
1281 for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
1283 if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
1285 if(!i->second.referenced)
1287 unused_nodes.insert(i->first);
1288 clear_assignments(i->second, true);
1291 variables.pop_back();
1294 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
1296 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
1297 if(i!=aggregates.end())
1298 unused_nodes.erase(i->second);
1300 if(var.declaration && !assignment_target)
1302 VariableInfo &var_info = variables.back()[var.declaration];
1303 var_info.assignments.clear();
1304 var_info.referenced = true;
1308 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
1310 TraversingVisitor::visit(memacc);
1311 unused_nodes.erase(memacc.declaration);
1314 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
1316 if(binary.oper=="[")
1318 binary.left->visit(*this);
1319 SetForScope<bool> set(assignment_target, false);
1320 binary.right->visit(*this);
1323 TraversingVisitor::visit(binary);
1326 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
1329 SetForScope<bool> set(assignment_target, !assign.self_referencing);
1330 assign.left->visit(*this);
1332 assign.right->visit(*this);
1333 assignment = &assign;
1336 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
1338 VariableInfo &var_info = variables.back()[&var];
1340 clear_assignments(var_info, true);
1341 var_info.assignments.push_back(&node);
1342 var_info.conditionally_assigned = false;
1345 void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
1349 for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
1350 unused_nodes.insert(*i);
1352 var_info.assignments.clear();
1355 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
1358 TraversingVisitor::visit(expr);
1359 if(assignment && assignment->target_declaration)
1360 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
1363 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
1365 SetForScope<Node *> set(aggregate, &strct);
1366 unused_nodes.insert(&strct);
1367 TraversingVisitor::visit(strct);
1370 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
1373 aggregates[&var] = aggregate;
1376 variables.back()[&var].local = true;
1377 if(var.init_expression)
1378 record_assignment(var, *var.init_expression, false);
1380 unused_nodes.erase(var.type_declaration);
1381 TraversingVisitor::visit(var);
1384 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
1386 SetForScope<Node *> set(aggregate, &iface);
1387 unused_nodes.insert(&iface);
1388 TraversingVisitor::visit(iface);
1391 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
1393 variables.push_back(BlockVariableMap());
1396 SetForScope<bool> set(global_scope, false);
1397 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1399 func.body.visit(*this);
1402 BlockVariableMap &block_variables = variables.back();
1403 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1404 i->second.conditionally_assigned = true;
1405 for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1406 block_variables[i->get()].referenced = true;
1407 merge_down_variables();
1410 void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
1412 BlockVariableMap &parent_variables = variables[variables.size()-2];
1413 BlockVariableMap &block_variables = variables.back();
1414 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1418 if(!i->second.referenced)
1419 unused_nodes.insert(i->first);
1420 clear_assignments(i->second, true);
1424 BlockVariableMap::iterator j = parent_variables.find(i->first);
1425 if(j==parent_variables.end())
1426 parent_variables.insert(*i);
1429 if(i->second.referenced || !i->second.conditionally_assigned)
1430 clear_assignments(j->second, !i->second.referenced);
1431 j->second.conditionally_assigned = i->second.conditionally_assigned;
1432 j->second.referenced |= i->second.referenced;
1433 j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
1436 variables.pop_back();
1439 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1441 cond.condition->visit(*this);
1442 variables.push_back(BlockVariableMap());
1443 cond.body.visit(*this);
1445 BlockVariableMap if_variables;
1446 swap(variables.back(), if_variables);
1447 cond.else_body.visit(*this);
1449 BlockVariableMap &else_variables = variables.back();
1450 for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
1452 BlockVariableMap::iterator j = if_variables.find(i->first);
1453 if(j!=if_variables.end())
1455 i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
1456 i->second.conditionally_assigned |= j->second.conditionally_assigned;
1457 if_variables.erase(j);
1460 i->second.conditionally_assigned = true;
1463 for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
1465 i->second.conditionally_assigned = true;
1466 else_variables.insert(*i);
1469 merge_down_variables();
1472 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1474 variables.push_back(BlockVariableMap());
1475 TraversingVisitor::visit(iter);
1477 BlockVariableMap &block_variables = variables.back();
1478 for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
1479 if(!i->second.local && i->second.referenced)
1480 i->second.assignments.clear();
1482 merge_down_variables();
1486 ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
1488 conditionally_assigned(false),
1493 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
1495 TraversingVisitor::visit(call);
1497 unused_nodes.erase(call.declaration);
1498 if(call.declaration && call.declaration->definition!=call.declaration)
1499 used_definitions.insert(call.declaration->definition);
1502 void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
1504 TraversingVisitor::visit(func);
1506 if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
1507 unused_nodes.insert(&func);
1511 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1515 void ProgramCompiler::NodeRemover::visit(Block &block)
1517 for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1520 if(to_remove.count(i->get()))
1521 block.body.erase(i++);
1527 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1529 if(to_remove.count(&var))
1531 stage->in_variables.erase(var.name);
1532 stage->out_variables.erase(var.name);
1533 stage->locations.erase(var.name);
1534 if(var.linked_declaration)
1535 var.linked_declaration->linked_declaration = 0;
1537 else if(var.init_expression && to_remove.count(var.init_expression.get()))
1538 var.init_expression = 0;
1542 void ProgramCompiler::PrecisionRemover::visit(Precision &)
1547 void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
1549 var.precision.clear();
1553 ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
1557 void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
1561 SetForScope<bool> set(toplevel, false);
1562 BlockModifier::visit(block);
1565 Visitor::visit(block);
1568 void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
1570 have_default.insert(prec.type);
1573 void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
1575 if(var.type_declaration)
1578 string type = var.type;
1579 if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
1581 else if(!type.compare(0, 3, "ivec") || type=="uint")
1584 if(!have_default.count(type))
1586 Precision *prec = new Precision;
1587 if(!type.compare(0, 7, "sampler"))
1588 prec->precision = "lowp";
1589 else if(stage->type==FRAGMENT)
1590 prec->precision = "mediump";
1592 prec->precision = "highp";
1594 insert_nodes.push_back(prec);
1596 have_default.insert(type);
1601 ProgramCompiler::LegacyConverter::LegacyConverter():
1602 target_api(get_gl_api()),
1603 target_version(get_glsl_version()),
1607 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
1608 target_api(get_gl_api()),
1613 bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
1615 if(target_version<feature_version)
1617 else if(stage->required_version<feature_version)
1618 stage->required_version = feature_version;
1623 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
1625 if(target_api==OPENGL_ES2)
1626 return check_version(Version(3, 0));
1628 return check_version(Version(1, 30));
1631 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
1633 if(var.declaration==frag_out && !supports_unified_interface_syntax())
1635 var.name = "gl_FragColor";
1636 var.declaration = 0;
1639 else if(var.declaration)
1640 type = var.declaration->type;
1645 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
1647 TraversingVisitor::visit(assign);
1648 if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
1649 assign.target_declaration = 0;
1652 bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
1654 if(target_api==OPENGL_ES2)
1655 return check_version(Version(3, 0));
1657 return check_version(Version(1, 30));
1660 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
1662 if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
1664 vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
1665 if(i!=call.arguments.end())
1668 if(type=="sampler1D")
1669 call.name = "texture1D";
1670 else if(type=="sampler2D")
1671 call.name = "texture2D";
1672 else if(type=="sampler3D")
1673 call.name = "texture3D";
1674 else if(type=="sampler1DShadow")
1675 call.name = "shadow1D";
1676 else if(type=="sampler2DShadow")
1677 call.name = "shadow2D";
1679 for(; i!=call.arguments.end(); ++i)
1684 TraversingVisitor::visit(call);
1687 bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
1689 if(target_api==OPENGL_ES2)
1690 return check_version(Version(3, 0));
1692 return check_version(Version(3, 30));
1695 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
1697 if(var.layout && !supports_interface_layouts())
1699 vector<Layout::Qualifier>::iterator i;
1700 for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
1701 if(i!=var.layout->qualifiers.end())
1703 unsigned location = lexical_cast<unsigned>(i->value);
1704 if(stage->type==VERTEX && var.interface=="in")
1706 stage->locations[var.name] = location;
1707 var.layout->qualifiers.erase(i);
1709 else if(stage->type==FRAGMENT && var.interface=="out")
1712 static Require _req(EXT_gpu_shader4);
1713 stage->locations[var.name] = location;
1714 var.layout->qualifiers.erase(i);
1717 if(var.layout->qualifiers.empty())
1722 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
1724 if(stage->type==FRAGMENT && var.interface=="out")
1731 TraversingVisitor::visit(var);
1734 bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
1736 if(target_api==OPENGL_ES2)
1738 if(iface=="uniform")
1739 return check_version(Version(3, 0));
1741 return check_version(Version(3, 20));
1744 return check_version(Version(1, 50));
1747 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
1749 if(!supports_interface_blocks(iface.interface))
1750 flatten_block(iface.members);