1 #include <msp/core/raii.h>
2 #include <msp/strings/format.h>
3 #include <msp/strings/utils.h>
6 #include "programcompiler.h"
14 using namespace ProgramSyntax;
16 ProgramCompiler::ProgramCompiler():
20 void ProgramCompiler::compile(const string &source)
22 module = &parser.parse(source);
26 void ProgramCompiler::compile(IO::Base &io)
28 module = &parser.parse(io);
32 void ProgramCompiler::add_shaders(Program &program)
35 throw invalid_operation("ProgramCompiler::add_shaders");
37 string head = "#version 150\n";
38 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
41 program.attach_shader_owned(new VertexShader(head+create_source(*i)));
42 else if(i->type==GEOMETRY)
43 program.attach_shader_owned(new GeometryShader(head+create_source(*i)));
44 else if(i->type==FRAGMENT)
45 program.attach_shader_owned(new FragmentShader(head+create_source(*i)));
48 program.bind_attribute(VERTEX4, "vertex");
49 program.bind_attribute(NORMAL3, "normal");
50 program.bind_attribute(COLOR4_FLOAT, "color");
51 program.bind_attribute(TEXCOORD4, "texcoord");
54 void ProgramCompiler::process()
56 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
58 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
62 void ProgramCompiler::generate(Stage &stage)
64 inject_block(stage.content, module->shared.content);
66 apply<VariableResolver>(stage);
67 apply<InterfaceGenerator>(stage);
68 apply<VariableResolver>(stage);
69 apply<VariableRenamer>(stage);
72 void ProgramCompiler::optimize(Stage &stage)
76 UnusedVariableLocator unused_locator;
77 unused_locator.apply(stage);
80 remover.to_remove = unused_locator.unused_nodes;
83 if(!remover.n_removed)
88 void ProgramCompiler::inject_block(Block &target, const Block &source)
90 list<NodePtr<Node> >::iterator insert_point = target.body.begin();
91 for(list<NodePtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
92 target.body.insert(insert_point, (*i)->clone());
96 void ProgramCompiler::apply(Stage &stage)
102 string ProgramCompiler::create_source(Stage &stage)
105 formatter.apply(stage);
106 return formatter.formatted;
110 ProgramCompiler::Visitor::Visitor():
114 void ProgramCompiler::Visitor::apply(Stage &s)
116 SetForScope<Stage *> set(stage, &s);
117 stage->content.visit(*this);
121 ProgramCompiler::Formatter::Formatter():
123 parameter_list(false),
127 void ProgramCompiler::Formatter::visit(Literal &literal)
129 formatted += literal.token;
132 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
135 parexpr.expression->visit(*this);
139 void ProgramCompiler::Formatter::visit(VariableReference &var)
141 formatted += var.name;
144 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
146 memacc.left->visit(*this);
147 formatted += format(".%s", memacc.member);
150 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
153 formatted += unary.oper;
154 unary.expression->visit(*this);
156 formatted += unary.oper;
159 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
161 binary.left->visit(*this);
162 if(binary.assignment)
163 formatted += format(" %s ", binary.oper);
165 formatted += binary.oper;
166 binary.right->visit(*this);
167 formatted += binary.after;
170 void ProgramCompiler::Formatter::visit(FunctionCall &call)
172 formatted += format("%s(", call.name);
173 for(vector<NodePtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
175 if(i!=call.arguments.begin())
182 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
184 expr.expression->visit(*this);
188 void ProgramCompiler::Formatter::visit(Block &block)
197 formatted += format("%s{\n", string(indent*2, ' '));
200 bool change_indent = (!formatted.empty() && !else_if);
201 indent += change_indent;
202 string spaces(indent*2, ' ');
203 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
205 if(i!=block.body.begin())
211 indent -= change_indent;
214 formatted += format("\n%s}", string(indent*2, ' '));
217 void ProgramCompiler::Formatter::visit(Layout &layout)
219 formatted += "layout(";
220 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
222 if(i!=layout.qualifiers.begin())
224 formatted += i->identifier;
225 if(!i->value.empty())
226 formatted += format("=%s", i->value);
228 formatted += format(") %s;", layout.interface);
231 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
233 formatted += format("struct %s\n", strct.name);
234 strct.members.visit(*this);
238 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
241 formatted += "const ";
242 if(!var.sampling.empty())
243 formatted += format("%s ", var.sampling);
244 if(!var.interface.empty())
245 formatted += format("%s ", var.interface);
246 formatted += format("%s %s", var.type, var.name);
251 var.array_size->visit(*this);
254 if(var.init_expression)
257 var.init_expression->visit(*this);
263 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
265 formatted += format("%s %s\n", iface.interface, iface.name);
266 iface.members.visit(*this);
270 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
272 formatted += format("%s %s(", func.return_type, func.name);
273 for(vector<NodePtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
275 if(i!=func.parameters.begin())
277 SetFlag set(parameter_list);
284 func.body.visit(*this);
290 void ProgramCompiler::Formatter::visit(Conditional &cond)
299 cond.condition->visit(*this);
302 cond.body.visit(*this);
303 if(!cond.else_body.body.empty())
305 formatted += format("\n%selse", string(indent*2, ' '));
306 SetFlag set(else_if);
307 cond.else_body.visit(*this);
311 void ProgramCompiler::Formatter::visit(Iteration &iter)
314 iter.init_statement->visit(*this);
316 iter.condition->visit(*this);
318 iter.loop_expression->visit(*this);
320 iter.body.visit(*this);
323 void ProgramCompiler::Formatter::visit(Return &ret)
325 formatted += "return ";
326 ret.expression->visit(*this);
331 ProgramCompiler::VariableResolver::VariableResolver():
335 void ProgramCompiler::VariableResolver::visit(Block &block)
337 blocks.push_back(&block);
338 block.variables.clear();
339 TraversingVisitor::visit(block);
343 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
347 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
350 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
351 if(j!=(*i)->variables.end())
353 var.declaration = j->second;
354 type = j->second->type_declaration;
360 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
363 TraversingVisitor::visit(memacc);
364 memacc.declaration = 0;
367 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
368 if(i!=type->members.variables.end())
370 memacc.declaration = i->second;
371 type = i->second->type_declaration;
378 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
382 binary.right->visit(*this);
384 binary.left->visit(*this);
388 TraversingVisitor::visit(binary);
393 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
395 TraversingVisitor::visit(strct);
396 blocks.back()->types[strct.name] = &strct;
399 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
401 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
404 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
405 if(j!=(*i)->types.end())
406 var.type_declaration = j->second;
409 TraversingVisitor::visit(var);
410 blocks.back()->variables[var.name] = &var;
411 if(anonymous && blocks.size()>1)
412 blocks[blocks.size()-2]->variables[var.name] = &var;
415 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
417 SetFlag set(anonymous);
418 TraversingVisitor::visit(iface);
422 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
427 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
431 else if(type==GEOMETRY)
437 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
439 SetForScope<Stage *> set(stage, &s);
441 in_prefix = get_out_prefix(stage->previous->type);
442 out_prefix = get_out_prefix(stage->type);
443 stage->content.visit(*this);
446 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
448 SetForScope<unsigned> set(scope_level, scope_level+1);
449 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
455 for(map<string, Node *>::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
457 list<NodePtr<Node> >::iterator k = block.body.insert(i, j->second);
460 iface_declarations.clear();
463 for(list<Node *>::iterator j=insert_nodes.begin(); j!=insert_nodes.end(); ++j)
464 block.body.insert(i, *j);
465 insert_nodes.clear();
468 block.body.erase(i++);
475 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
477 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
478 return prefix+name.substr(offset);
481 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &out, const string &iface, const string &name)
483 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
484 if(stage_vars.count(name) || iface_declarations.count(name))
487 VariableDeclaration* iface_var = new VariableDeclaration;
488 iface_var->sampling = out.sampling;
489 iface_var->interface = iface;
490 iface_var->type = out.type;
491 iface_var->type_declaration = out.type_declaration;
492 iface_var->name = name;
493 iface_var->array = (out.array || (stage->type==GEOMETRY && iface=="in"));
494 iface_var->array_size = out.array_size;
496 iface_var->linked_declaration = &out;
497 iface_declarations[name] = iface_var;
502 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
504 BinaryExpression *assign = new BinaryExpression;
505 VariableReference *ref = new VariableReference;
509 assign->right = right;
510 assign->assignment = true;
512 ExpressionStatement *stmt = new ExpressionStatement;
513 stmt->expression = assign;
514 insert_nodes.push_back(stmt);
517 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
519 if(var.declaration || !stage->previous)
521 if(iface_declarations.count(var.name))
524 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
525 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
526 if(i==prev_out.end())
527 i = prev_out.find(in_prefix+var.name);
528 if(i!=prev_out.end())
529 generate_interface(*i->second, "in", var.name);
532 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
534 if(var.interface=="out")
537 stage->out_variables[var.name] = &var;
538 else if(generate_interface(var, "out", change_prefix(var.name, string())))
541 if(var.init_expression)
542 insert_assignment(var.name, var.init_expression->clone());
545 else if(var.interface=="in")
547 stage->in_variables[var.name] = &var;
548 if(var.linked_declaration)
549 var.linked_declaration->linked_declaration = &var;
550 else if(stage->previous)
552 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
553 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
554 if(i!=prev_out.end())
556 var.linked_declaration = i->second;
557 i->second->linked_declaration = &var;
562 TraversingVisitor::visit(var);
565 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
569 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
570 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
572 string out_name = change_prefix(i->second->name, out_prefix);
573 generate_interface(*i->second, "in", i->second->name);
574 generate_interface(*i->second, "out", out_name);
576 VariableReference *ref = new VariableReference;
577 ref->name = i->first;
580 BinaryExpression *subscript = new BinaryExpression;
581 subscript->left = ref;
582 subscript->oper = "[";
583 subscript->right = pass.subscript;
584 subscript->after = "]";
585 insert_assignment(out_name, subscript);
588 insert_assignment(out_name, ref);
596 void ProgramCompiler::VariableRenamer::visit(VariableReference &var)
599 var.name = var.declaration->name;
602 void ProgramCompiler::VariableRenamer::visit(VariableDeclaration &var)
604 if(var.linked_declaration)
605 var.name = var.linked_declaration->name;
606 TraversingVisitor::visit(var);
610 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
615 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
618 assignment_target = var.declaration;
621 unused_nodes.erase(var.declaration);
622 map<VariableDeclaration *, Node *>::iterator i = assignments.find(var.declaration);
623 if(i!=assignments.end())
624 unused_nodes.erase(i->second);
628 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
630 TraversingVisitor::visit(memacc);
631 unused_nodes.erase(memacc.declaration);
634 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
636 if(binary.assignment)
638 binary.right->visit(*this);
640 binary.left->visit(*this);
643 TraversingVisitor::visit(binary);
646 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
649 assignment_target = 0;
650 TraversingVisitor::visit(expr);
651 if(assignment && assignment_target)
653 if(assignment_target->interface!="out" || (stage->type!=FRAGMENT && !assignment_target->linked_declaration))
655 unused_nodes.insert(&expr);
656 assignments[assignment_target] = &expr;
659 unused_nodes.erase(assignment_target);
664 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
666 unused_nodes.insert(&var);
667 TraversingVisitor::visit(var);
671 ProgramCompiler::NodeRemover::NodeRemover():
673 immutable_block(false),
677 void ProgramCompiler::NodeRemover::visit(Block &block)
679 remove_block = immutable_block;
680 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
682 bool remove = to_remove.count(&**i);
684 remove_block = false;
687 if(remove ? !immutable_block : remove_block)
689 block.body.erase(i++);
697 void ProgramCompiler::NodeRemover::visit(StructDeclaration &strct)
699 SetFlag set(immutable_block);
700 TraversingVisitor::visit(strct);
703 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
705 if(to_remove.count(&var))
707 stage->in_variables.erase(var.name);
708 stage->out_variables.erase(var.name);
709 if(var.linked_declaration)
710 var.linked_declaration->linked_declaration = 0;
714 void ProgramCompiler::NodeRemover::visit(InterfaceBlock &iface)
716 SetFlag set(immutable_block);
717 TraversingVisitor::visit(iface);