#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();
}
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)));
+ program.attach_shader_owned(new VertexShader(head+apply<Formatter>(*i)));
else if(i->type==GEOMETRY)
- program.attach_shader_owned(new GeometryShader(head+create_source(*i)));
+ program.attach_shader_owned(new GeometryShader(head+apply<Formatter>(*i)));
else if(i->type==FRAGMENT)
- program.attach_shader_owned(new FragmentShader(head+create_source(*i)));
+ program.attach_shader_owned(new FragmentShader(head+apply<Formatter>(*i)));
}
program.bind_attribute(VERTEX4, "vertex");
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)
{
- UnusedVariableLocator unused_locator;
- unused_locator.apply(stage);
+ set<Node *> unused = apply<UnusedVariableLocator>(stage);
+ apply<NodeRemover>(stage, unused);
- NodeRemover remover;
- remover.to_remove = unused_locator.unused_nodes;
- remover.apply(stage);
-
- return !unused_locator.unused_nodes.empty();
+ return !unused.empty();
}
void ProgramCompiler::inject_block(Block &target, const Block &source)
}
template<typename T>
-void ProgramCompiler::apply(Stage &stage)
+typename T::ResultType ProgramCompiler::apply(Stage &stage)
{
T visitor;
visitor.apply(stage);
+ return visitor.get_result();
}
-string ProgramCompiler::create_source(Stage &stage)
+template<typename T, typename A>
+typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
{
- Formatter formatter;
- formatter.apply(stage);
- return formatter.formatted;
+ T visitor(arg);
+ visitor.apply(stage);
+ return visitor.get_result();
}
ProgramCompiler::Formatter::Formatter():
indent(0),
parameter_list(false),
- else_if(false)
+ else_if(0)
{ }
void ProgramCompiler::Formatter::visit(Literal &literal)
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, ' '));
- }
+ if(else_if)
+ --else_if;
- bool change_indent = (!formatted.empty() && !else_if);
- indent += change_indent;
+ unsigned brace_indent = indent;
+ bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
+ if(use_braces)
+ formatted += format("%s{\n", string(brace_indent*2, ' '));
+
+ SetForScope<unsigned> set(indent, indent+!formatted.empty());
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;
+ formatted += spaces;
(*i)->visit(*this);
+ else_if = 0;
}
- indent -= change_indent;
- if(block.use_braces)
- formatted += format("\n%s}", string(indent*2, ' '));
+ if(use_braces)
+ 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)
(*i)->visit(*this);
}
formatted += ')';
- if(func.definition)
+ if(func.definition==&func)
{
formatted += '\n';
func.body.visit(*this);
void ProgramCompiler::Formatter::visit(Conditional &cond)
{
if(else_if)
- {
- formatted += ' ';
- else_if = false;
- }
+ formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
+
+ indent -= else_if;
formatted += "if(";
cond.condition->visit(*this);
cond.body.visit(*this);
if(!cond.else_body.body.empty())
{
- formatted += format("\n%selse", string(indent*2, ' '));
- SetFlag set(else_if);
+ formatted += format("\n%selse\n", string(indent*2, ' '));
+ SetForScope<unsigned> set(else_if, 2);
cond.else_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::NodeRemover::NodeRemover(const set<Node *> &r):
+ to_remove(r)
+{ }
+
void ProgramCompiler::NodeRemover::visit(Block &block)
{
for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )