X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglsl%2Foptimize.cpp;h=596d7e20b071365850cb8d3e894b6eb0db910c1b;hb=8f2713a3f1501e90016bb8069ecd08dde2f90e56;hp=7b3f8f28c8ad00007b520446ed5c2cc1180c49d0;hpb=4fb346536bfefd612635a248f558b1f1471deae6;p=libs%2Fgl.git

diff --git a/source/glsl/optimize.cpp b/source/glsl/optimize.cpp
index 7b3f8f28..596d7e20 100644
--- a/source/glsl/optimize.cpp
+++ b/source/glsl/optimize.cpp
@@ -8,6 +8,55 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
+ConstantSpecializer::ConstantSpecializer():
+	values(0)
+{ }
+
+void ConstantSpecializer::apply(Stage &stage, const map<string, int> &v)
+{
+	values = &v;
+	stage.content.visit(*this);
+}
+
+void ConstantSpecializer::visit(VariableDeclaration &var)
+{
+	bool specializable = false;
+	if(var.layout)
+	{
+		vector<Layout::Qualifier> &qualifiers = var.layout->qualifiers;
+		for(vector<Layout::Qualifier>::iterator i=qualifiers.begin(); (!specializable && i!=qualifiers.end()); ++i)
+			if(i->name=="constant_id")
+			{
+				specializable = true;
+				qualifiers.erase(i);
+			}
+
+		if(qualifiers.empty())
+			var.layout = 0;
+	}
+
+	if(specializable)
+	{
+		map<string, int>::const_iterator i = values->find(var.name);
+		if(i!=values->end())
+		{
+			RefPtr<Literal> literal = new Literal;
+			if(var.type=="bool")
+			{
+				literal->token = (i->second ? "true" : "false");
+				literal->value = static_cast<bool>(i->second);
+			}
+			else if(var.type=="int")
+			{
+				literal->token = lexical_cast<string>(i->second);
+				literal->value = i->second;
+			}
+			var.init_expression = literal;
+		}
+	}
+}
+
+
 InlineableFunctionLocator::InlineableFunctionLocator():
 	current_function(0),
 	return_count(0)