+++ /dev/null
-#include <msp/core/raii.h>
-#include <msp/strings/format.h>
-#include <msp/strings/utils.h>
-#include "error.h"
-#include "program.h"
-#include "programcompiler.h"
-#include "shader.h"
-
-using namespace std;
-
-namespace {
-
-const char builtins_src[] =
- "////// vertex\n"
- "out gl_PerVertex {\n"
- " vec4 gl_Position;\n"
- " float gl_ClipDistance[];\n"
- "};"
- "////// geometry\n"
- "in gl_PerVertex {\n"
- " vec4 gl_Position;\n"
- " float gl_ClipDistance[];\n"
- "} gl_in[];\n"
- "out gl_PerVertex {\n"
- " vec4 gl_Position;\n"
- " float gl_ClipDistance[];\n"
- "};\n";
-
-}
-
-namespace Msp {
-namespace GL {
-
-using namespace ProgramSyntax;
-
-ProgramCompiler::ProgramCompiler():
- module(0)
-{ }
-
-void ProgramCompiler::compile(const string &source)
-{
- module = &parser.parse(source);
- process();
-}
-
-void ProgramCompiler::compile(IO::Base &io)
-{
- module = &parser.parse(io);
- process();
-}
-
-void ProgramCompiler::add_shaders(Program &program)
-{
- if(!module)
- throw invalid_operation("ProgramCompiler::add_shaders");
-
- string head = "#version 150\n";
- for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
- {
- if(i->type==VERTEX)
- program.attach_shader_owned(new VertexShader(head+create_source(*i)));
- else if(i->type==GEOMETRY)
- program.attach_shader_owned(new GeometryShader(head+create_source(*i)));
- else if(i->type==FRAGMENT)
- program.attach_shader_owned(new FragmentShader(head+create_source(*i)));
- }
-
- program.bind_attribute(VERTEX4, "vertex");
- program.bind_attribute(NORMAL3, "normal");
- program.bind_attribute(COLOR4_FLOAT, "color");
- program.bind_attribute(TEXCOORD4, "texcoord");
-}
-
-Module *ProgramCompiler::create_builtins_module()
-{
- ProgramParser parser;
- Module *module = new Module(parser.parse(builtins_src));
- for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
- {
- VariableResolver resolver;
- i->content.visit(resolver);
- for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
- j->second->linked_declaration = j->second;
- }
- return module;
-}
-
-Module &ProgramCompiler::get_builtins_module()
-{
- static RefPtr<Module> builtins_module = create_builtins_module();
- return *builtins_module;
-}
-
-Stage *ProgramCompiler::get_builtins(StageType type)
-{
- Module &module = get_builtins_module();
- for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
- if(i->type==type)
- return &*i;
- return 0;
-}
-
-void ProgramCompiler::process()
-{
- for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
- generate(*i);
- for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
- {
- if(optimize(*i))
- i = module->stages.begin();
- else
- ++i;
- }
-}
-
-void ProgramCompiler::generate(Stage &stage)
-{
- inject_block(stage.content, module->shared.content);
-
- apply<VariableResolver>(stage);
- apply<InterfaceGenerator>(stage);
- apply<VariableResolver>(stage);
- apply<VariableRenamer>(stage);
-}
-
-bool ProgramCompiler::optimize(Stage &stage)
-{
- UnusedVariableLocator unused_locator;
- unused_locator.apply(stage);
-
- NodeRemover remover;
- remover.to_remove = unused_locator.unused_nodes;
- remover.apply(stage);
-
- return !unused_locator.unused_nodes.empty();
-}
-
-void ProgramCompiler::inject_block(Block &target, const Block &source)
-{
- list<NodePtr<Node> >::iterator insert_point = target.body.begin();
- for(list<NodePtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
- target.body.insert(insert_point, (*i)->clone());
-}
-
-template<typename T>
-void ProgramCompiler::apply(Stage &stage)
-{
- T visitor;
- visitor.apply(stage);
-}
-
-string ProgramCompiler::create_source(Stage &stage)
-{
- Formatter formatter;
- formatter.apply(stage);
- return formatter.formatted;
-}
-
-
-ProgramCompiler::Visitor::Visitor():
- stage(0)
-{ }
-
-void ProgramCompiler::Visitor::apply(Stage &s)
-{
- SetForScope<Stage *> set(stage, &s);
- stage->content.visit(*this);
-}
-
-
-ProgramCompiler::Formatter::Formatter():
- indent(0),
- parameter_list(false),
- else_if(false)
-{ }
-
-void ProgramCompiler::Formatter::visit(Literal &literal)
-{
- formatted += literal.token;
-}
-
-void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
-{
- formatted += '(';
- parexpr.expression->visit(*this);
- formatted += ')';
-}
-
-void ProgramCompiler::Formatter::visit(VariableReference &var)
-{
- formatted += var.name;
-}
-
-void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
-{
- memacc.left->visit(*this);
- formatted += format(".%s", memacc.member);
-}
-
-void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
-{
- if(unary.prefix)
- formatted += unary.oper;
- unary.expression->visit(*this);
- if(!unary.prefix)
- formatted += unary.oper;
-}
-
-void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
-{
- binary.left->visit(*this);
- if(binary.assignment)
- formatted += format(" %s ", binary.oper);
- else
- formatted += binary.oper;
- binary.right->visit(*this);
- formatted += binary.after;
-}
-
-void ProgramCompiler::Formatter::visit(FunctionCall &call)
-{
- formatted += format("%s(", call.name);
- for(vector<NodePtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
- {
- if(i!=call.arguments.begin())
- formatted += ", ";
- (*i)->visit(*this);
- }
- formatted += ')';
-}
-
-void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
-{
- expr.expression->visit(*this);
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(Block &block)
-{
- if(block.use_braces)
- {
- if(else_if)
- {
- formatted += '\n';
- else_if = false;
- }
- formatted += format("%s{\n", string(indent*2, ' '));
- }
-
- bool change_indent = (!formatted.empty() && !else_if);
- indent += change_indent;
- string spaces(indent*2, ' ');
- for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
- {
- if(i!=block.body.begin())
- formatted += '\n';
- if(!else_if)
- formatted += spaces;
- (*i)->visit(*this);
- }
- indent -= change_indent;
-
- if(block.use_braces)
- formatted += format("\n%s}", string(indent*2, ' '));
-}
-
-void ProgramCompiler::Formatter::visit(Layout &layout)
-{
- formatted += "layout(";
- for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
- {
- if(i!=layout.qualifiers.begin())
- formatted += ", ";
- formatted += i->identifier;
- if(!i->value.empty())
- formatted += format("=%s", i->value);
- }
- formatted += format(") %s;", layout.interface);
-}
-
-void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
-{
- formatted += format("struct %s\n", strct.name);
- strct.members.visit(*this);
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
-{
- if(var.constant)
- formatted += "const ";
- if(!var.sampling.empty())
- formatted += format("%s ", var.sampling);
- if(!var.interface.empty() && var.interface!=block_interface)
- formatted += format("%s ", var.interface);
- formatted += format("%s %s", var.type, var.name);
- if(var.array)
- {
- formatted += '[';
- if(var.array_size)
- var.array_size->visit(*this);
- formatted += ']';
- }
- if(var.init_expression)
- {
- formatted += " = ";
- var.init_expression->visit(*this);
- }
- if(!parameter_list)
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
-{
- SetForScope<string> set(block_interface, iface.interface);
- formatted += format("%s %s\n", iface.interface, iface.name);
- iface.members.visit(*this);
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
-{
- formatted += format("%s %s(", func.return_type, func.name);
- for(vector<NodePtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
- {
- if(i!=func.parameters.begin())
- formatted += ", ";
- SetFlag set(parameter_list);
- (*i)->visit(*this);
- }
- formatted += ')';
- if(func.definition)
- {
- formatted += '\n';
- func.body.visit(*this);
- }
- else
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(Conditional &cond)
-{
- if(else_if)
- {
- formatted += ' ';
- else_if = false;
- }
-
- formatted += "if(";
- cond.condition->visit(*this);
- formatted += ")\n";
-
- cond.body.visit(*this);
- if(!cond.else_body.body.empty())
- {
- formatted += format("\n%selse", string(indent*2, ' '));
- SetFlag set(else_if);
- cond.else_body.visit(*this);
- }
-}
-
-void ProgramCompiler::Formatter::visit(Iteration &iter)
-{
- formatted += "for(";
- iter.init_statement->visit(*this);
- formatted += ' ';
- iter.condition->visit(*this);
- formatted += "; ";
- iter.loop_expression->visit(*this);
- formatted += ")\n";
- iter.body.visit(*this);
-}
-
-void ProgramCompiler::Formatter::visit(Return &ret)
-{
- formatted += "return ";
- ret.expression->visit(*this);
- formatted += ';';
-}
-
-
-ProgramCompiler::VariableResolver::VariableResolver():
- anonymous(false)
-{ }
-
-void ProgramCompiler::VariableResolver::apply(Stage &s)
-{
- SetForScope<Stage *> set(stage, &s);
- Stage *builtins = get_builtins(stage->type);
- if(builtins)
- blocks.push_back(&builtins->content);
- stage->content.visit(*this);
- if(builtins)
- blocks.pop_back();
-}
-
-void ProgramCompiler::VariableResolver::visit(Block &block)
-{
- blocks.push_back(&block);
- block.variables.clear();
- TraversingVisitor::visit(block);
- blocks.pop_back();
-}
-
-void ProgramCompiler::VariableResolver::visit(VariableReference &var)
-{
- var.declaration = 0;
- type = 0;
- for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
- {
- --i;
- map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
- if(j!=(*i)->variables.end())
- {
- var.declaration = j->second;
- type = j->second->type_declaration;
- break;
- }
- }
-}
-
-void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
-{
- type = 0;
- TraversingVisitor::visit(memacc);
- memacc.declaration = 0;
- if(type)
- {
- map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
- if(i!=type->members.variables.end())
- {
- memacc.declaration = i->second;
- type = i->second->type_declaration;
- }
- else
- type = 0;
- }
-}
-
-void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
-{
- if(binary.oper=="[")
- {
- binary.right->visit(*this);
- type = 0;
- binary.left->visit(*this);
- }
- else
- {
- TraversingVisitor::visit(binary);
- type = 0;
- }
-}
-
-void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
-{
- TraversingVisitor::visit(strct);
- blocks.back()->types[strct.name] = &strct;
-}
-
-void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
-{
- for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
- {
- --i;
- map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
- if(j!=(*i)->types.end())
- var.type_declaration = j->second;
- }
-
- if(!block_interface.empty() && var.interface.empty())
- var.interface = block_interface;
-
- TraversingVisitor::visit(var);
- blocks.back()->variables[var.name] = &var;
- if(anonymous && blocks.size()>1)
- blocks[blocks.size()-2]->variables[var.name] = &var;
-}
-
-void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
-{
- SetFlag set(anonymous);
- SetForScope<string> set2(block_interface, iface.interface);
- TraversingVisitor::visit(iface);
-}
-
-
-ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
- scope_level(0),
- remove_node(false)
-{ }
-
-string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
-{
- if(type==VERTEX)
- return "_vs_out_";
- else if(type==GEOMETRY)
- return "_gs_out_";
- else
- return string();
-}
-
-void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
-{
- SetForScope<Stage *> set(stage, &s);
- if(stage->previous)
- in_prefix = get_out_prefix(stage->previous->type);
- out_prefix = get_out_prefix(stage->type);
- stage->content.visit(*this);
-}
-
-void ProgramCompiler::InterfaceGenerator::visit(Block &block)
-{
- SetForScope<unsigned> set(scope_level, scope_level+1);
- for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
- {
- (*i)->visit(*this);
-
- if(scope_level==1)
- {
- for(map<string, VariableDeclaration *>::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
- {
- list<NodePtr<Node> >::iterator k = block.body.insert(i, j->second);
- (*k)->visit(*this);
- }
- iface_declarations.clear();
- }
-
- for(list<Node *>::iterator j=insert_nodes.begin(); j!=insert_nodes.end(); ++j)
- block.body.insert(i, *j);
- insert_nodes.clear();
-
- if(remove_node)
- block.body.erase(i++);
- else
- ++i;
- remove_node = false;
- }
-}
-
-string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
-{
- unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
- return prefix+name.substr(offset);
-}
-
-bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
-{
- const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
- if(stage_vars.count(name) || iface_declarations.count(name))
- return false;
-
- VariableDeclaration* iface_var = new VariableDeclaration;
- iface_var->sampling = var.sampling;
- iface_var->interface = iface;
- iface_var->type = var.type;
- iface_var->type_declaration = var.type_declaration;
- iface_var->name = name;
- if(stage->type==GEOMETRY)
- iface_var->array = ((var.array && var.interface!="in") || iface=="in");
- else
- iface_var->array = var.array;
- if(iface_var->array)
- iface_var->array_size = var.array_size;
- if(iface=="in")
- iface_var->linked_declaration = &var;
- iface_declarations[name] = iface_var;
-
- return true;
-}
-
-void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
-{
- BinaryExpression *assign = new BinaryExpression;
- VariableReference *ref = new VariableReference;
- ref->name = left;
- assign->left = ref;
- assign->oper = "=";
- assign->right = right;
- assign->assignment = true;
-
- ExpressionStatement *stmt = new ExpressionStatement;
- stmt->expression = assign;
- insert_nodes.push_back(stmt);
-}
-
-void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
-{
- if(var.declaration || !stage->previous)
- return;
- if(iface_declarations.count(var.name))
- return;
-
- const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
- map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
- if(i==prev_out.end())
- i = prev_out.find(in_prefix+var.name);
- if(i!=prev_out.end())
- generate_interface(*i->second, "in", var.name);
-}
-
-void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
-{
- if(var.interface=="out")
- {
- if(scope_level==1)
- stage->out_variables[var.name] = &var;
- else if(generate_interface(var, "out", change_prefix(var.name, string())))
- {
- remove_node = true;
- if(var.init_expression)
- insert_assignment(var.name, var.init_expression->clone());
- }
- }
- else if(var.interface=="in")
- {
- stage->in_variables[var.name] = &var;
- if(var.linked_declaration)
- var.linked_declaration->linked_declaration = &var;
- else if(stage->previous)
- {
- const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
- map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
- if(i!=prev_out.end())
- {
- var.linked_declaration = i->second;
- i->second->linked_declaration = &var;
- }
- }
- }
-
- TraversingVisitor::visit(var);
-}
-
-void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
-{
- vector<VariableDeclaration *> pass_vars;
-
- for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
- pass_vars.push_back(i->second);
- for(map<string, VariableDeclaration *>::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
- if(i->second->interface=="in")
- pass_vars.push_back(i->second);
-
- if(stage->previous)
- {
- const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
- for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
- {
- bool linked = false;
- for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
- linked = ((*j)->linked_declaration==i->second);
-
- if(!linked && generate_interface(*i->second, "in", i->second->name))
- pass_vars.push_back(i->second);
- }
- }
-
- for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
- {
- string out_name = change_prefix((*i)->name, out_prefix);
- generate_interface(**i, "out", out_name);
-
- VariableReference *ref = new VariableReference;
- ref->name = (*i)->name;
- if(pass.subscript)
- {
- BinaryExpression *subscript = new BinaryExpression;
- subscript->left = ref;
- subscript->oper = "[";
- subscript->right = pass.subscript;
- subscript->after = "]";
- insert_assignment(out_name, subscript);
- }
- else
- insert_assignment(out_name, ref);
- }
-
- remove_node = true;
-}
-
-
-void ProgramCompiler::VariableRenamer::visit(VariableReference &var)
-{
- if(var.declaration)
- var.name = var.declaration->name;
-}
-
-void ProgramCompiler::VariableRenamer::visit(VariableDeclaration &var)
-{
- if(var.linked_declaration)
- var.name = var.linked_declaration->name;
- TraversingVisitor::visit(var);
-}
-
-
-ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
- aggregate(0),
- assignment(false),
- record_target(false),
- assignment_target(0),
- indeterminate_target(false),
- self_referencing(false)
-{ }
-
-void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
-{
- if(record_target)
- {
- if(assignment_target)
- indeterminate_target = true;
- else
- assignment_target = var.declaration;
- }
- else
- {
- unused_nodes.erase(var.declaration);
-
- map<VariableDeclaration *, Node *>::iterator i = assignments.find(var.declaration);
- if(i!=assignments.end())
- {
- unused_nodes.erase(i->second);
- assignments.erase(i);
- }
-
- if(assignment && var.declaration==assignment_target)
- self_referencing = true;
- }
-
- map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
- if(i!=aggregates.end())
- unused_nodes.erase(i->second);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
-{
- TraversingVisitor::visit(memacc);
- unused_nodes.erase(memacc.declaration);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
-{
- if(binary.assignment)
- {
- assignment = true;
- {
- SetFlag set(record_target);
- binary.left->visit(*this);
- }
- if(binary.oper!="=")
- self_referencing = true;
- binary.right->visit(*this);
- }
- else if(record_target && binary.oper=="[")
- {
- binary.left->visit(*this);
- SetForScope<bool> set(record_target, false);
- binary.right->visit(*this);
- }
- else
- TraversingVisitor::visit(binary);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
-{
- assignment = false;
- assignment_target = 0;
- indeterminate_target = false;
- self_referencing = false;
- TraversingVisitor::visit(expr);
- if(assignment && assignment_target && !indeterminate_target)
- {
- Node *&assign = assignments[assignment_target];
- if(self_referencing)
- unused_nodes.erase(assign);
- else if(assign)
- unused_nodes.insert(assign);
- assign = &expr;
- if(assignment_target->interface=="out" && (stage->type==FRAGMENT || assignment_target->linked_declaration))
- unused_nodes.erase(assignment_target);
- else
- unused_nodes.insert(&expr);
- }
- assignment = false;
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
-{
- SetForScope<Node *> set(aggregate, &strct);
- unused_nodes.insert(&strct);
- TraversingVisitor::visit(strct);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
-{
- if(aggregate)
- aggregates[&var] = aggregate;
- else
- {
- unused_nodes.insert(&var);
- if(var.init_expression)
- {
- unused_nodes.insert(&*var.init_expression);
- assignments[&var] = &*var.init_expression;
- }
- }
- unused_nodes.erase(var.type_declaration);
- TraversingVisitor::visit(var);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
-{
- SetForScope<Node *> set(aggregate, &iface);
- unused_nodes.insert(&iface);
- TraversingVisitor::visit(iface);
-}
-
-
-void ProgramCompiler::NodeRemover::visit(Block &block)
-{
- for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
- {
- (*i)->visit(*this);
- if(to_remove.count(&**i))
- block.body.erase(i++);
- else
- ++i;
- }
-}
-
-void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
-{
- if(to_remove.count(&var))
- {
- stage->in_variables.erase(var.name);
- stage->out_variables.erase(var.name);
- if(var.linked_declaration)
- var.linked_declaration->linked_declaration = 0;
- }
- else if(var.init_expression && to_remove.count(&*var.init_expression))
- var.init_expression = 0;
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff