X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglsl%2Fvisitor.cpp;fp=source%2Fglsl%2Fvisitor.cpp;h=9bbd4914b1a0a289caa3c48a3504fa6c79e0c11d;hb=518f751d385b733adbf43fe4056403740709edec;hp=d8b1813959f17e4535ea1ea8c60001c22a36d76f;hpb=f7b29fcfe408965c9cba79095eb05c49eca4a98e;p=libs%2Fgl.git

diff --git a/source/glsl/visitor.cpp b/source/glsl/visitor.cpp
index d8b18139..9bbd4914 100644
--- a/source/glsl/visitor.cpp
+++ b/source/glsl/visitor.cpp
@@ -200,6 +200,39 @@ void NodeRemover::visit(Iteration &iter)
 	TraversingVisitor::visit(iter);
 }
 
+
+NodeReorderer::NodeReorderer():
+	reorder_before(0),
+	to_reorder(0)
+{ }
+
+void NodeReorderer::apply(Stage &stage, Node &before, const set<Node *> &tr)
+{
+	reorder_before = &before;
+	to_reorder = &tr;
+	stage.content.visit(*this);
+}
+
+void NodeReorderer::visit(Block &block)
+{
+	NodeList<Statement>::iterator insert_point = block.body.end();
+	for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
+	{
+		(*i)->visit(*this);
+		if(insert_point!=block.body.end() && to_reorder->count(i->get()))
+		{
+			NodeList<Statement>::iterator j = i++;
+			block.body.splice(insert_point, block.body, j);
+		}
+		else
+		{
+			if(i->get()==reorder_before)
+				insert_point = i;
+			++i;
+		}
+	}
+}
+
 } // namespace SL
 } // namespace GL
 } // namespace Msp