From 0062e134b1caf75cecb6b8ef81c150002622942f Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Sat, 26 Mar 2011 00:12:09 +0000
Subject: [PATCH] fix cegui + shader issue

---
 panda/src/glstuff/glGraphicsStateGuardian_src.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
index bd705809f8..dc116de8ff 100644
--- a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
+++ b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
@@ -1958,6 +1958,11 @@ void CLP(GraphicsStateGuardian)::
 clear_before_callback() {
   disable_standard_vertex_arrays();
   unbind_buffers();
+
+  // Some callbacks may quite reasonably assume that the active
+  // texture stage is still set to stage 0.  CEGUI, in particular,
+  // makes this assumption.
+  _glActiveTexture(GL_TEXTURE0);
 }
 
 ////////////////////////////////////////////////////////////////////