#include "error.h"
#include "program.h"
#include "programcompiler.h"
+#include "resources.h"
#include "shader.h"
using namespace std;
using namespace ProgramSyntax;
ProgramCompiler::ProgramCompiler():
+ resources(0),
module(0)
{ }
void ProgramCompiler::compile(const string &source)
{
+ resources = 0;
module = &parser.parse(source);
process();
}
-void ProgramCompiler::compile(IO::Base &io)
+void ProgramCompiler::compile(IO::Base &io, Resources *res)
{
+ resources = res;
module = &parser.parse(io);
process();
}
void ProgramCompiler::process()
{
+ list<Import *> imports = apply<NodeGatherer<Import> >(module->shared);
+ for(list<Import *>::iterator i=imports.end(); i!=imports.begin(); )
+ import((*--i)->module);
+ apply<NodeRemover>(module->shared, set<Node *>(imports.begin(), imports.end()));
+
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(); )
}
}
+void ProgramCompiler::import(const string &name)
+{
+ if(!resources)
+ throw runtime_error("no resources");
+ RefPtr<IO::Seekable> io = resources->open_raw(name+".glsl");
+ if(!io)
+ throw runtime_error(format("module %s not found", name));
+ ProgramParser import_parser;
+ Module &imported_module = import_parser.parse(*io);
+
+ inject_block(module->shared.content, imported_module.shared.content);
+ apply<DeclarationCombiner>(module->shared);
+ for(list<Stage>::iterator i=imported_module.stages.begin(); i!=imported_module.stages.end(); ++i)
+ {
+ list<Stage>::iterator j;
+ for(j=module->stages.begin(); (j!=module->stages.end() && j->type<i->type); ++j) ;
+ if(j==module->stages.end() || j->type>i->type)
+ {
+ j = module->stages.insert(j, *i);
+ list<Stage>::iterator k = j;
+ if(++k!=module->stages.end())
+ k->previous = &*j;
+ if(j!=module->stages.begin())
+ j->previous = &*--(k=j);
+ }
+ else
+ {
+ inject_block(j->content, i->content);
+ apply<DeclarationCombiner>(*j);
+ }
+ }
+}
+
void ProgramCompiler::generate(Stage &stage)
{
inject_block(stage.content, module->shared.content);
bool ProgramCompiler::optimize(Stage &stage)
{
+ apply<ConstantConditionEliminator>(stage);
+ apply<VariableResolver>(stage);
+
set<Node *> unused = apply<UnusedVariableLocator>(stage);
apply<NodeRemover>(stage, unused);
formatted += format("\n%s}", string(brace_indent*2, ' '));
}
+void ProgramCompiler::Formatter::visit(Import &import)
+{
+ formatted += format("import %s;", import.module);
+}
+
void ProgramCompiler::Formatter::visit(Layout &layout)
{
formatted += "layout(";
(*i)->visit(*this);
}
formatted += ')';
- if(func.definition)
+ if(func.definition==&func)
{
formatted += '\n';
func.body.visit(*this);
}
+ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
+ toplevel(true),
+ remove_node(false)
+{ }
+
+void ProgramCompiler::DeclarationCombiner::visit(Block &block)
+{
+ if(!toplevel)
+ return;
+
+ SetForScope<bool> set(toplevel, false);
+ for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
+ {
+ remove_node = false;
+ (*i)->visit(*this);
+ if(remove_node)
+ block.body.erase(i++);
+ else
+ ++i;
+ }
+}
+
+void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
+{
+ vector<FunctionDeclaration *> &decls = functions[func.name];
+ if(func.definition)
+ {
+ for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
+ {
+ (*i)->definition = func.definition;
+ (*i)->body.body.clear();
+ }
+ }
+ decls.push_back(&func);
+}
+
+void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
+{
+ VariableDeclaration *&ptr = variables[var.name];
+ if(ptr)
+ {
+ if(var.init_expression)
+ ptr->init_expression = var.init_expression;
+ remove_node = true;
+ }
+ else
+ ptr = &var;
+}
+
+
ProgramCompiler::VariableResolver::VariableResolver():
anonymous(false),
record_target(false),
}
+ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
+ variable_values(0),
+ result(0.0f),
+ result_valid(false)
+{ }
+
+ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
+ variable_values(&v),
+ result(0.0f),
+ result_valid(false)
+{ }
+
+void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
+{
+ if(literal.token=="true")
+ result = 1.0f;
+ else if(literal.token=="false")
+ result = 0.0f;
+ else
+ result = lexical_cast<float>(literal.token);
+ result_valid = true;
+}
+
+void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
+{
+ if(!var.declaration)
+ return;
+
+ if(variable_values)
+ {
+ ValueMap::const_iterator i = variable_values->find(var.declaration);
+ if(i!=variable_values->end())
+ i->second->visit(*this);
+ }
+ else if(var.declaration->init_expression)
+ var.declaration->init_expression->visit(*this);
+}
+
+void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
+{
+ result_valid = false;
+ unary.expression->visit(*this);
+ if(!result_valid)
+ return;
+
+ if(unary.oper=="!")
+ result = !result;
+ else
+ result_valid = false;
+}
+
+void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
+{
+ result_valid = false;
+ binary.left->visit(*this);
+ if(!result_valid)
+ return;
+
+ float left_result = result;
+ result_valid = false;
+ binary.right->visit(*this);
+ if(!result_valid)
+ return;
+
+ if(binary.oper=="<")
+ result = (left_result<result);
+ else if(binary.oper=="<=")
+ result = (left_result<=result);
+ else if(binary.oper==">")
+ result = (left_result>result);
+ else if(binary.oper==">=")
+ result = (left_result>=result);
+ else if(binary.oper=="==")
+ result = (left_result==result);
+ else if(binary.oper=="!=")
+ result = (left_result!=result);
+ else if(binary.oper=="&&")
+ result = (left_result && result);
+ else if(binary.oper=="||")
+ result = (left_result || result);
+ else
+ result_valid = false;
+}
+
+
+ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
+ scope_level(0),
+ remove_node(false),
+ replacement_block(0)
+{ }
+
+void ProgramCompiler::ConstantConditionEliminator::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(replacement_block)
+ {
+ for(list<NodePtr<Node> >::iterator j=replacement_block->body.begin(); j!=replacement_block->body.end(); ++j)
+ block.body.insert(i, *j);
+ replacement_block = 0;
+ }
+
+ if(remove_node)
+ block.body.erase(i++);
+ else
+ ++i;
+ remove_node = false;
+ }
+
+ for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
+ variable_values.erase(i->second);
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
+{
+ variable_values.erase(assign.target_declaration);
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
+{
+ if(var.constant || scope_level>1)
+ variable_values[&var] = &*var.init_expression;
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
+{
+ ExpressionEvaluator eval(variable_values);
+ cond.condition->visit(eval);
+ if(eval.result_valid)
+ {
+ remove_node = true;
+ replacement_block = (eval.result ? &cond.body : &cond.else_body);
+ }
+ else
+ TraversingVisitor::visit(cond);
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
+{
+ if(iter.condition)
+ {
+ ExpressionEvaluator eval;
+ iter.condition->visit(eval);
+ if(eval.result_valid && !eval.result)
+ {
+ remove_node = true;
+ return;
+ }
+ }
+
+ TraversingVisitor::visit(iter);
+}
+
+
ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
aggregate(0),
assignment(0),
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