+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);
+ }
+}
+
+