+++ /dev/null
-#include <msp/core/raii.h>
-#include <msp/gl/extensions/ext_gpu_shader4.h>
-#include <msp/strings/format.h>
-#include <msp/strings/utils.h>
-#include "error.h"
-#include "program.h"
-#include "programcompiler.h"
-#include "resources.h"
-#include "shader.h"
-
-using namespace std;
-
-namespace {
-
-const char builtins_src[] =
- "#pragma MSP stage(vertex)\n"
- "out gl_PerVertex {\n"
- " vec4 gl_Position;\n"
- " float gl_ClipDistance[];\n"
- "};\n"
- "#pragma MSP stage(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():
- resources(0),
- module(0)
-{ }
-
-ProgramCompiler::~ProgramCompiler()
-{
- delete module;
-}
-
-void ProgramCompiler::compile(const string &source, const string &src_name)
-{
- resources = 0;
- delete module;
- module = new Module();
- ProgramParser parser;
- imported_names.insert(src_name);
- append_module(parser.parse(source, src_name));
- process();
-}
-
-void ProgramCompiler::compile(IO::Base &io, Resources *res, const string &src_name)
-{
- resources = res;
- delete module;
- module = new Module();
- ProgramParser parser;
- imported_names.insert(src_name);
- append_module(parser.parse(io, src_name));
- process();
-}
-
-void ProgramCompiler::compile(IO::Base &io, const string &src_name)
-{
- compile(io, 0, src_name);
-}
-
-void ProgramCompiler::add_shaders(Program &program)
-{
- if(!module)
- throw invalid_operation("ProgramCompiler::add_shaders");
-
- for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
- {
- if(i->type==VERTEX)
- {
- program.attach_shader_owned(new VertexShader(apply<Formatter>(*i)));
- for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
- program.bind_attribute(j->second, j->first);
- }
- else if(i->type==GEOMETRY)
- program.attach_shader_owned(new GeometryShader(apply<Formatter>(*i)));
- else if(i->type==FRAGMENT)
- {
- program.attach_shader_owned(new FragmentShader(apply<Formatter>(*i)));
- if(EXT_gpu_shader4)
- {
- for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
- program.bind_fragment_data(j->second, j->first);
- }
- }
- }
-}
-
-Module *ProgramCompiler::create_builtins_module()
-{
- ProgramParser parser;
- Module *module = new Module(parser.parse(builtins_src, "<builtin>"));
- 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::append_module(ProgramSyntax::Module &mod)
-{
- vector<Import *> imports = apply<NodeGatherer<Import> >(mod.shared);
- for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
- import((*i)->module);
- apply<NodeRemover>(mod.shared, set<Node *>(imports.begin(), imports.end()));
-
- append_stage(mod.shared);
- for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
- append_stage(*i);
-}
-
-void ProgramCompiler::append_stage(Stage &stage)
-{
- Stage *target = 0;
- if(stage.type==SHARED)
- target = &module->shared;
- else
- {
- list<Stage>::iterator i;
- for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
- if(i==module->stages.end() || i->type>stage.type)
- {
- list<Stage>::iterator j = module->stages.insert(i, stage.type);
- if(i!=module->stages.end())
- i->previous = &*j;
- i = j;
- if(i!=module->stages.begin())
- i->previous = &*--j;
- }
-
- target = &*i;
- }
-
- for(NodeList<Node>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
- target->content.body.push_back(*i);
- apply<DeclarationCombiner>(*target);
-}
-
-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;
- }
- for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
- finalize(*i);
-}
-
-void ProgramCompiler::import(const string &name)
-{
- string fn = name+".glsl";
- if(imported_names.count(fn))
- return;
- imported_names.insert(fn);
-
- RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
- if(!io)
- throw runtime_error(format("module %s not found", name));
- ProgramParser import_parser;
- append_module(import_parser.parse(*io, fn));
-}
-
-void ProgramCompiler::generate(Stage &stage)
-{
- inject_block(stage.content, module->shared.content);
-
- apply<DeclarationReorderer>(stage);
- apply<FunctionResolver>(stage);
- apply<VariableResolver>(stage);
- apply<InterfaceGenerator>(stage);
- apply<VariableResolver>(stage);
- apply<DeclarationReorderer>(stage);
- apply<FunctionResolver>(stage);
- apply<LegacyConverter>(stage);
-}
-
-bool ProgramCompiler::optimize(Stage &stage)
-{
- apply<ConstantConditionEliminator>(stage);
-
- set<FunctionDeclaration *> inlineable = apply<InlineableFunctionLocator>(stage);
- apply<FunctionInliner>(stage, inlineable);
-
- set<Node *> unused = apply<UnusedVariableLocator>(stage);
- set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
- unused.insert(unused2.begin(), unused2.end());
- apply<NodeRemover>(stage, unused);
-
- return !unused.empty();
-}
-
-void ProgramCompiler::finalize(Stage &stage)
-{
- if(get_gl_api()==OPENGL_ES2)
- apply<DefaultPrecisionGenerator>(stage);
- else
- apply<PrecisionRemover>(stage);
-}
-
-void ProgramCompiler::inject_block(Block &target, const Block &source)
-{
- list<RefPtr<Node> >::iterator insert_point = target.body.begin();
- for(list<RefPtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
- target.body.insert(insert_point, (*i)->clone());
-}
-
-template<typename T>
-typename T::ResultType ProgramCompiler::apply(Stage &stage)
-{
- T visitor;
- visitor.apply(stage);
- return visitor.get_result();
-}
-
-template<typename T, typename A>
-typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
-{
- T visitor(arg);
- visitor.apply(stage);
- return visitor.get_result();
-}
-
-
-ProgramCompiler::Visitor::Visitor():
- stage(0)
-{ }
-
-void ProgramCompiler::Visitor::apply(Stage &s)
-{
- SetForScope<Stage *> set(stage, &s);
- stage->content.visit(*this);
-}
-
-
-ProgramCompiler::BlockModifier::BlockModifier():
- remove_node(false)
-{ }
-
-void ProgramCompiler::BlockModifier::flatten_block(Block &block)
-{
- insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
- remove_node = true;
-}
-
-void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
-{
- block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
- insert_nodes.clear();
-
- if(remove_node)
- block.body.erase(i++);
- else
- ++i;
- remove_node = false;
-}
-
-void ProgramCompiler::BlockModifier::visit(Block &block)
-{
- for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
- {
- (*i)->visit(*this);
- apply_and_increment(block, i);
- }
-}
-
-
-ProgramCompiler::Formatter::Formatter():
- indent(0),
- parameter_list(false),
- else_if(0)
-{ }
-
-void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
-{
- GLApi api = get_gl_api();
- const Version &ver = s.required_version;
-
- if(ver)
- {
- formatted += format("#version %d%02d", ver.major, ver.minor);
- if(api==OPENGL_ES2 && ver>=Version(3, 0))
- formatted += " es";
- formatted += '\n';
- }
-
- Visitor::apply(s);
-}
-
-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);
- formatted += binary.oper;
- binary.right->visit(*this);
- formatted += binary.after;
-}
-
-void ProgramCompiler::Formatter::visit(Assignment &assign)
-{
- assign.left->visit(*this);
- formatted += format(" %s ", assign.oper);
- assign.right->visit(*this);
-}
-
-void ProgramCompiler::Formatter::visit(FunctionCall &call)
-{
- formatted += format("%s(", call.name);
- for(vector<RefPtr<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(else_if)
- --else_if;
-
- 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+(indent>0 || use_braces));
- string spaces(indent*2, ' ');
- for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
- {
- if(i!=block.body.begin())
- formatted += '\n';
- formatted += spaces;
- (*i)->visit(*this);
- else_if = 0;
- }
-
- 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(Precision &prec)
-{
- formatted += format("precision %s %s;", prec.precision, prec.type);
-}
-
-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 += ')';
-}
-
-void ProgramCompiler::Formatter::visit(InterfaceLayout &layout)
-{
- layout.layout.visit(*this);
- 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.layout)
- {
- var.layout->visit(*this);
- formatted += ' ';
- }
- if(var.constant)
- formatted += "const ";
- if(!var.interpolation.empty())
- formatted += format("%s ", var.interpolation);
- if(!var.sampling.empty())
- formatted += format("%s ", var.sampling);
- if(!var.interface.empty() && var.interface!=block_interface)
- {
- string interface = var.interface;
- if(stage->required_version<Version(1, 30))
- {
- if(stage->type==VERTEX && var.interface=="in")
- interface = "attribute";
- else if((stage->type==VERTEX && var.interface=="out") || (stage->type==FRAGMENT && var.interface=="in"))
- interface = "varying";
- }
- formatted += format("%s ", interface);
- }
- if(!var.precision.empty())
- formatted += format("%s ", var.precision);
- 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<RefPtr<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==&func)
- {
- formatted += '\n';
- func.body.visit(*this);
- }
- else
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(Conditional &cond)
-{
- if(else_if)
- formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
-
- indent -= else_if;
-
- formatted += "if(";
- cond.condition->visit(*this);
- formatted += ")\n";
-
- cond.body.visit(*this);
- if(!cond.else_body.body.empty())
- {
- formatted += format("\n%selse\n", string(indent*2, ' '));
- SetForScope<unsigned> set(else_if, 2);
- cond.else_body.visit(*this);
- }
-}
-
-void ProgramCompiler::Formatter::visit(Iteration &iter)
-{
- formatted += "for(";
- if(iter.init_statement)
- iter.init_statement->visit(*this);
- else
- formatted += ';';
- if(iter.condition)
- {
- formatted += ' ';
- iter.condition->visit(*this);
- }
- formatted += ';';
- if(iter.loop_expression)
- {
- formatted += ' ';
- iter.loop_expression->visit(*this);
- }
- formatted += ')';
-
- if(iter.body.body.empty())
- formatted += " { }";
- else
- {
- formatted += '\n';
- iter.body.visit(*this);
- }
-}
-
-void ProgramCompiler::Formatter::visit(Return &ret)
-{
- formatted += "return";
- if(ret.expression)
- {
- formatted += ' ';
- ret.expression->visit(*this);
- }
- formatted += ';';
-}
-
-void ProgramCompiler::Formatter::visit(Jump &jump)
-{
- formatted += jump.keyword;
- formatted += ';';
-}
-
-
-ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
- toplevel(true)
-{ }
-
-void ProgramCompiler::DeclarationCombiner::visit(Block &block)
-{
- if(!toplevel)
- return;
-
- SetForScope<bool> set(toplevel, false);
- BlockModifier::visit(block);
-}
-
-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)
- {
- ptr->type = var.type;
- if(var.init_expression)
- ptr->init_expression = var.init_expression;
- remove_node = true;
- }
- else
- ptr = &var;
-}
-
-
-ProgramCompiler::VariableResolver::VariableResolver():
- anonymous(false),
- record_target(false),
- assignment_target(0),
- self_referencing(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;
- }
- }
-
- if(record_target)
- {
- if(assignment_target)
- {
- record_target = false;
- assignment_target = 0;
- }
- else
- assignment_target = var.declaration;
- }
- else if(var.declaration && var.declaration==assignment_target)
- self_referencing = true;
-}
-
-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=="[")
- {
- {
- SetForScope<bool> set(record_target, false);
- binary.right->visit(*this);
- }
- type = 0;
- binary.left->visit(*this);
- }
- else
- {
- TraversingVisitor::visit(binary);
- type = 0;
- }
-}
-
-void ProgramCompiler::VariableResolver::visit(Assignment &assign)
-{
- {
- SetFlag set(record_target);
- assignment_target = 0;
- assign.left->visit(*this);
- }
-
- self_referencing = false;
- assign.right->visit(*this);
-
- assign.self_referencing = (self_referencing || assign.oper!="=");
- assign.target_declaration = assignment_target;
-}
-
-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);
-}
-
-
-void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
-{
- map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
- if(i!=functions.end())
- call.declaration = i->second.back();
-
- TraversingVisitor::visit(call);
-}
-
-void ProgramCompiler::FunctionResolver::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;
- decls.clear();
- decls.push_back(&func);
- }
- else if(!decls.empty() && decls.back()->definition)
- func.definition = decls.back()->definition;
- else
- decls.push_back(&func);
-
- TraversingVisitor::visit(func);
-}
-
-
-ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
- scope_level(0)
-{ }
-
-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<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
- {
- (*i)->visit(*this);
-
- if(scope_level==1)
- {
- for(map<string, RefPtr<VariableDeclaration> >::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
- {
- list<RefPtr<Node> >::iterator k = block.body.insert(i, j->second);
- (*k)->visit(*this);
- }
- iface_declarations.clear();
- }
-
- apply_and_increment(block, i);
- }
-}
-
-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)
-{
- Assignment *assign = new Assignment;
- VariableReference *ref = new VariableReference;
- ref->name = left;
- assign->left = ref;
- assign->oper = "=";
- assign->right = right;
-
- ExpressionStatement *stmt = new ExpressionStatement;
- stmt->expression = assign;
- stmt->visit(*this);
- 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", i->second->name);
- var.name = i->second->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());
- return;
- }
- }
- }
- 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, RefPtr<VariableDeclaration> >::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
- if(i->second->interface=="in")
- pass_vars.push_back(i->second.get());
-
- 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);
- }
- }
-
- if(stage->type==GEOMETRY)
- {
- VariableReference *ref = new VariableReference;
- ref->name = "gl_in";
-
- BinaryExpression *subscript = new BinaryExpression;
- subscript->left = ref;
- subscript->oper = "[";
- subscript->right = pass.subscript;
- subscript->after = "]";
-
- MemberAccess *memacc = new MemberAccess;
- memacc->left = subscript;
- memacc->member = "gl_Position";
-
- insert_assignment("gl_Position", memacc);
- }
-
- 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;
-}
-
-
-ProgramCompiler::DeclarationReorderer::DeclarationReorderer():
- scope_level(0),
- kind(NO_DECLARATION)
-{ }
-
-void ProgramCompiler::DeclarationReorderer::visit(FunctionCall &call)
-{
- FunctionDeclaration *def = call.declaration;
- if(def)
- def = def->definition;
- if(def && !ordered_funcs.count(def))
- needed_funcs.insert(def);
-}
-
-void ProgramCompiler::DeclarationReorderer::visit(Block &block)
-{
- SetForScope<unsigned> set(scope_level, scope_level+1);
- if(scope_level>1)
- return Visitor::visit(block);
-
- list<RefPtr<Node> >::iterator struct_insert_point = block.body.end();
- list<RefPtr<Node> >::iterator variable_insert_point = block.body.end();
- list<RefPtr<Node> >::iterator function_insert_point = block.body.end();
- unsigned unordered_func_count = 0;
- bool ordered_any_funcs = false;
-
- for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
- {
- kind = NO_DECLARATION;
- (*i)->visit(*this);
-
- bool moved = false;
- if(kind==STRUCT && struct_insert_point!=block.body.end())
- {
- block.body.insert(struct_insert_point, *i);
- moved = true;
- }
- else if(kind>STRUCT && struct_insert_point==block.body.end())
- struct_insert_point = i;
-
- if(kind==VARIABLE && variable_insert_point!=block.body.end())
- {
- block.body.insert(variable_insert_point, *i);
- moved = true;
- }
- else if(kind>VARIABLE && variable_insert_point==block.body.end())
- variable_insert_point = i;
-
- if(kind==FUNCTION)
- {
- if(function_insert_point==block.body.end())
- function_insert_point = i;
-
- if(needed_funcs.empty())
- {
- ordered_funcs.insert(i->get());
- if(i!=function_insert_point)
- {
- block.body.insert(function_insert_point, *i);
- moved = true;
- }
- else
- ++function_insert_point;
- ordered_any_funcs = true;
- }
- else
- ++unordered_func_count;
- }
-
- if(moved)
- {
- if(function_insert_point==i)
- ++function_insert_point;
- block.body.erase(i++);
- }
- else
- ++i;
-
- if(i==block.body.end() && unordered_func_count)
- {
- if(!ordered_any_funcs)
- // A subset of the remaining functions forms a recursive loop
- /* TODO pick a function and move it up, adding any necessary
- declarations */
- break;
-
- i = function_insert_point;
- unordered_func_count = 0;
- }
- }
-}
-
-void ProgramCompiler::DeclarationReorderer::visit(ProgramSyntax::VariableDeclaration &var)
-{
- Visitor::visit(var);
- kind = VARIABLE;
-}
-
-void ProgramCompiler::DeclarationReorderer::visit(FunctionDeclaration &func)
-{
- needed_funcs.clear();
- func.body.visit(*this);
- needed_funcs.erase(&func);
- kind = FUNCTION;
-}
-
-
-ProgramCompiler::InlineableFunctionLocator::InlineableFunctionLocator():
- in_function(0)
-{ }
-
-void ProgramCompiler::InlineableFunctionLocator::visit(FunctionCall &call)
-{
- FunctionDeclaration *def = call.declaration;
- if(def && def->definition!=def)
- def = def->definition;
-
- if(def)
- {
- unsigned &count = refcounts[def];
- ++count;
- if(count>1 || def==in_function)
- inlineable.erase(def);
- }
-
- TraversingVisitor::visit(call);
-}
-
-void ProgramCompiler::InlineableFunctionLocator::visit(FunctionDeclaration &func)
-{
- unsigned &count = refcounts[func.definition];
- if(!count && func.parameters.empty())
- inlineable.insert(func.definition);
-
- SetForScope<FunctionDeclaration *> set(in_function, &func);
- TraversingVisitor::visit(func);
-}
-
-
-ProgramCompiler::FunctionInliner::FunctionInliner():
- extract_result(0)
-{ }
-
-ProgramCompiler::FunctionInliner::FunctionInliner(const set<FunctionDeclaration *> &in):
- inlineable(in),
- extract_result(0)
-{ }
-
-void ProgramCompiler::FunctionInliner::visit_and_inline(RefPtr<Expression> &ptr)
-{
- inline_result = 0;
- ptr->visit(*this);
- if(inline_result)
- ptr = inline_result;
-}
-
-void ProgramCompiler::FunctionInliner::visit(Block &block)
-{
- if(extract_result)
- --extract_result;
-
- for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
- {
- (*i)->visit(*this);
- if(extract_result)
- --extract_result;
- }
-}
-
-void ProgramCompiler::FunctionInliner::visit(UnaryExpression &unary)
-{
- visit_and_inline(unary.expression);
- inline_result = 0;
-}
-
-void ProgramCompiler::FunctionInliner::visit(BinaryExpression &binary)
-{
- visit_and_inline(binary.left);
- visit_and_inline(binary.right);
- inline_result = 0;
-}
-
-void ProgramCompiler::FunctionInliner::visit(MemberAccess &memacc)
-{
- visit_and_inline(memacc.left);
- inline_result = 0;
-}
-
-void ProgramCompiler::FunctionInliner::visit(FunctionCall &call)
-{
- for(vector<RefPtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
- visit_and_inline(*i);
-
- FunctionDeclaration *def = call.declaration;
- if(def && def->definition!=def)
- def = def->definition;
-
- if(def && inlineable.count(def))
- {
- extract_result = 2;
- def->visit(*this);
- }
- else
- inline_result = 0;
-}
-
-void ProgramCompiler::FunctionInliner::visit(Return &ret)
-{
- TraversingVisitor::visit(ret);
-
- if(extract_result)
- inline_result = ret.expression->clone();
-}
-
-
-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(ParenthesizedExpression &parexp)
-{
- parexp.expression->visit(*this);
-}
-
-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),
- record_only(false)
-{ }
-
-void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
-{
- SetForScope<unsigned> set(scope_level, scope_level+1);
- BlockModifier::visit(block);
-
- for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
- variable_values.erase(i->second);
-}
-
-void ProgramCompiler::ConstantConditionEliminator::visit(UnaryExpression &unary)
-{
- if(VariableReference *var = dynamic_cast<VariableReference *>(unary.expression.get()))
- if(unary.oper=="++" || unary.oper=="--")
- variable_values.erase(var->declaration);
-}
-
-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.get();
-}
-
-void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
-{
- if(!record_only)
- {
- ExpressionEvaluator eval(variable_values);
- cond.condition->visit(eval);
- if(eval.result_valid)
- {
- flatten_block(eval.result ? cond.body : cond.else_body);
- return;
- }
- }
-
- TraversingVisitor::visit(cond);
-}
-
-void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
-{
- if(!record_only)
- {
- if(iter.condition)
- {
- /* If the loop condition is always false on the first iteration, the
- entire loop can be removed */
- if(iter.init_statement)
- iter.init_statement->visit(*this);
- ExpressionEvaluator eval(variable_values);
- iter.condition->visit(eval);
- if(eval.result_valid && !eval.result)
- {
- remove_node = true;
- return;
- }
- }
-
- /* Record all assignments that occur inside the loop body so those
- variables won't be considered as constant */
- SetFlag set_record(record_only);
- TraversingVisitor::visit(iter);
- }
-
- TraversingVisitor::visit(iter);
-
- if(VariableDeclaration *init_decl = dynamic_cast<VariableDeclaration *>(iter.init_statement.get()))
- variable_values.erase(init_decl);
-}
-
-
-ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
- aggregate(0),
- assignment(0),
- assignment_target(false),
- global_scope(true)
-{ }
-
-void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
-{
- variables.push_back(BlockVariableMap());
- Visitor::apply(s);
- BlockVariableMap &global_variables = variables.back();
- for(BlockVariableMap::iterator i=global_variables.begin(); i!=global_variables.end(); ++i)
- {
- if(i->first->interface=="out" && (s.type==FRAGMENT || i->first->linked_declaration || !i->first->name.compare(0, 3, "gl_")))
- continue;
- if(!i->second.referenced)
- {
- unused_nodes.insert(i->first);
- clear_assignments(i->second, true);
- }
- }
- variables.pop_back();
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
-{
- map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
- if(i!=aggregates.end())
- unused_nodes.erase(i->second);
-
- if(var.declaration && !assignment_target)
- {
- VariableInfo &var_info = variables.back()[var.declaration];
- var_info.assignments.clear();
- var_info.referenced = true;
- }
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
-{
- TraversingVisitor::visit(memacc);
- unused_nodes.erase(memacc.declaration);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
-{
- if(binary.oper=="[")
- {
- binary.left->visit(*this);
- SetForScope<bool> set(assignment_target, false);
- binary.right->visit(*this);
- }
- else
- TraversingVisitor::visit(binary);
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
-{
- {
- SetForScope<bool> set(assignment_target, !assign.self_referencing);
- assign.left->visit(*this);
- }
- assign.right->visit(*this);
- assignment = &assign;
-}
-
-void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
-{
- VariableInfo &var_info = variables.back()[&var];
- if(!self_ref)
- clear_assignments(var_info, true);
- var_info.assignments.push_back(&node);
- var_info.conditionally_assigned = false;
-}
-
-void ProgramCompiler::UnusedVariableLocator::clear_assignments(VariableInfo &var_info, bool mark_unused)
-{
- if(mark_unused)
- {
- for(vector<Node *>::iterator i=var_info.assignments.begin(); i!=var_info.assignments.end(); ++i)
- unused_nodes.insert(*i);
- }
- var_info.assignments.clear();
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
-{
- assignment = 0;
- TraversingVisitor::visit(expr);
- if(assignment && assignment->target_declaration)
- record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
-}
-
-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
- {
- variables.back()[&var].local = true;
- if(var.init_expression)
- record_assignment(var, *var.init_expression, false);
- }
- 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::UnusedVariableLocator::visit(FunctionDeclaration &func)
-{
- variables.push_back(BlockVariableMap());
-
- {
- SetForScope<bool> set(global_scope, false);
- for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
- (*i)->visit(*this);
- func.body.visit(*this);
- }
-
- BlockVariableMap &block_variables = variables.back();
- for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
- i->second.conditionally_assigned = true;
- for(vector<RefPtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
- block_variables[i->get()].referenced = true;
- merge_down_variables();
-}
-
-void ProgramCompiler::UnusedVariableLocator::merge_down_variables()
-{
- BlockVariableMap &parent_variables = variables[variables.size()-2];
- BlockVariableMap &block_variables = variables.back();
- for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
- {
- if(i->second.local)
- {
- if(!i->second.referenced)
- unused_nodes.insert(i->first);
- clear_assignments(i->second, true);
- continue;
- }
-
- BlockVariableMap::iterator j = parent_variables.find(i->first);
- if(j==parent_variables.end())
- parent_variables.insert(*i);
- else
- {
- if(i->second.referenced || !i->second.conditionally_assigned)
- clear_assignments(j->second, !i->second.referenced);
- j->second.conditionally_assigned = i->second.conditionally_assigned;
- j->second.referenced |= i->second.referenced;
- j->second.assignments.insert(j->second.assignments.end(), i->second.assignments.begin(), i->second.assignments.end());
- }
- }
- variables.pop_back();
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
-{
- cond.condition->visit(*this);
- variables.push_back(BlockVariableMap());
- cond.body.visit(*this);
-
- BlockVariableMap if_variables;
- swap(variables.back(), if_variables);
- cond.else_body.visit(*this);
-
- BlockVariableMap &else_variables = variables.back();
- for(BlockVariableMap::iterator i=else_variables.begin(); i!=else_variables.end(); ++i)
- {
- BlockVariableMap::iterator j = if_variables.find(i->first);
- if(j!=if_variables.end())
- {
- i->second.assignments.insert(i->second.assignments.end(), j->second.assignments.begin(), j->second.assignments.end());
- i->second.conditionally_assigned |= j->second.conditionally_assigned;
- if_variables.erase(j);
- }
- else
- i->second.conditionally_assigned = true;
- }
-
- for(BlockVariableMap::iterator i=if_variables.begin(); i!=if_variables.end(); ++i)
- {
- i->second.conditionally_assigned = true;
- else_variables.insert(*i);
- }
-
- merge_down_variables();
-}
-
-void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
-{
- variables.push_back(BlockVariableMap());
- TraversingVisitor::visit(iter);
-
- BlockVariableMap &block_variables = variables.back();
- for(BlockVariableMap::iterator i=block_variables.begin(); i!=block_variables.end(); ++i)
- if(!i->second.local && i->second.referenced)
- i->second.assignments.clear();
-
- merge_down_variables();
-}
-
-
-ProgramCompiler::UnusedVariableLocator::VariableInfo::VariableInfo():
- local(false),
- conditionally_assigned(false),
- referenced(false)
-{ }
-
-
-void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
-{
- TraversingVisitor::visit(call);
-
- unused_nodes.erase(call.declaration);
- if(call.declaration && call.declaration->definition!=call.declaration)
- used_definitions.insert(call.declaration->definition);
-}
-
-void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
-{
- TraversingVisitor::visit(func);
-
- if((func.name!="main" || func.body.body.empty()) && !used_definitions.count(&func))
- unused_nodes.insert(&func);
-}
-
-
-ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
- to_remove(r)
-{ }
-
-void ProgramCompiler::NodeRemover::visit(Block &block)
-{
- for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
- {
- (*i)->visit(*this);
- if(to_remove.count(i->get()))
- 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);
- stage->locations.erase(var.name);
- if(var.linked_declaration)
- var.linked_declaration->linked_declaration = 0;
- }
- else if(var.init_expression && to_remove.count(var.init_expression.get()))
- var.init_expression = 0;
-}
-
-void ProgramCompiler::NodeRemover::visit(Iteration &iter)
-{
- if(to_remove.count(iter.init_statement.get()))
- iter.init_statement = 0;
-}
-
-
-void ProgramCompiler::PrecisionRemover::visit(Precision &)
-{
- remove_node = true;
-}
-
-void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
-{
- var.precision.clear();
-}
-
-
-ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
- toplevel(true)
-{ }
-
-void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
-{
- if(toplevel)
- {
- SetForScope<bool> set(toplevel, false);
- BlockModifier::visit(block);
- }
- else
- Visitor::visit(block);
-}
-
-void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
-{
- have_default.insert(prec.type);
-}
-
-void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
-{
- if(var.type_declaration)
- return;
-
- string type = var.type;
- if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
- type = "float";
- else if(!type.compare(0, 3, "ivec") || type=="uint")
- type = "int";
-
- if(!have_default.count(type))
- {
- Precision *prec = new Precision;
- if(!type.compare(0, 7, "sampler"))
- prec->precision = "lowp";
- else if(stage->type==FRAGMENT)
- prec->precision = "mediump";
- else
- prec->precision = "highp";
- prec->type = type;
- insert_nodes.push_back(prec);
-
- have_default.insert(type);
- }
-}
-
-
-ProgramCompiler::LegacyConverter::LegacyConverter():
- target_api(get_gl_api()),
- target_version(get_glsl_version()),
- frag_out(0)
-{ }
-
-ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
- target_api(get_gl_api()),
- target_version(v),
- frag_out(0)
-{ }
-
-bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
-{
- if(target_version<feature_version)
- return false;
- else if(stage->required_version<feature_version)
- stage->required_version = feature_version;
-
- return true;
-}
-
-bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
-{
- if(target_api==OPENGL_ES2)
- return check_version(Version(3, 0));
- else
- return check_version(Version(1, 30));
-}
-
-void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
-{
- if(var.declaration==frag_out && !supports_unified_interface_syntax())
- {
- var.name = "gl_FragColor";
- var.declaration = 0;
- type = "vec4";
- }
- else if(var.declaration)
- type = var.declaration->type;
- else
- type = string();
-}
-
-void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
-{
- TraversingVisitor::visit(assign);
- if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
- assign.target_declaration = 0;
-}
-
-bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
-{
- if(target_api==OPENGL_ES2)
- return check_version(Version(3, 0));
- else
- return check_version(Version(1, 30));
-}
-
-void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
-{
- if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
- {
- vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
- if(i!=call.arguments.end())
- {
- (*i)->visit(*this);
- if(type=="sampler1D")
- call.name = "texture1D";
- else if(type=="sampler2D")
- call.name = "texture2D";
- else if(type=="sampler3D")
- call.name = "texture3D";
- else if(type=="sampler1DShadow")
- call.name = "shadow1D";
- else if(type=="sampler2DShadow")
- call.name = "shadow2D";
-
- for(; i!=call.arguments.end(); ++i)
- (*i)->visit(*this);
- }
- }
- else
- TraversingVisitor::visit(call);
-}
-
-bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
-{
- if(target_api==OPENGL_ES2)
- return check_version(Version(3, 0));
- else
- return check_version(Version(3, 30));
-}
-
-bool ProgramCompiler::LegacyConverter::supports_centroid_sampling() const
-{
- if(target_api==OPENGL_ES2)
- return check_version(Version(3, 0));
- else
- return check_version(Version(1, 20));
-}
-
-bool ProgramCompiler::LegacyConverter::supports_sample_sampling() const
-{
- if(target_api==OPENGL_ES2)
- return check_version(Version(3, 20));
- else
- return check_version(Version(4, 0));
-}
-
-void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
-{
- if(var.layout && !supports_interface_layouts())
- {
- vector<Layout::Qualifier>::iterator i;
- for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
- if(i!=var.layout->qualifiers.end())
- {
- unsigned location = lexical_cast<unsigned>(i->value);
- if(stage->type==VERTEX && var.interface=="in")
- {
- stage->locations[var.name] = location;
- var.layout->qualifiers.erase(i);
- }
- else if(stage->type==FRAGMENT && var.interface=="out")
- {
- if(location!=0)
- static Require _req(EXT_gpu_shader4);
- stage->locations[var.name] = location;
- var.layout->qualifiers.erase(i);
- }
-
- if(var.layout->qualifiers.empty())
- var.layout = 0;
- }
- }
-
- if(var.sampling=="centroid")
- {
- if(!supports_centroid_sampling())
- var.sampling = string();
- }
- else if(var.sampling=="sample")
- {
- if(!supports_sample_sampling())
- var.sampling = string();
- }
-
- if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
- {
- if(stage->type==FRAGMENT && var.interface=="out")
- {
- frag_out = &var;
- remove_node = true;
- }
- }
-
- TraversingVisitor::visit(var);
-}
-
-bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
-{
- if(target_api==OPENGL_ES2)
- {
- if(iface=="uniform")
- return check_version(Version(3, 0));
- else
- return check_version(Version(3, 20));
- }
- else
- return check_version(Version(1, 50));
-}
-
-void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
-{
- if(!supports_interface_blocks(iface.interface))
- flatten_block(iface.members);
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff