X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogramcompiler.cpp;h=f30ccfa6233ad6b6dc8115488210c7f1dbd4c7a5;hp=f7d231615618178cecbcaf68ecf49caa2ae5835b;hb=HEAD;hpb=02c1541c20adf36ea09825dc7bc745f8487c4bc8

diff --git a/source/programcompiler.cpp b/source/programcompiler.cpp
deleted file mode 100644
index f7d23161..00000000
--- a/source/programcompiler.cpp
+++ /dev/null
@@ -1,776 +0,0 @@
-#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 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");
-}
-
-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())
-		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)
-{
-	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::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;
-	}
-
-	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);
-	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;
-	iface_var->array = (var.array || (stage->type==GEOMETRY && iface=="in"));
-	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