From d9af748b782bca19ce759ca09ad7bb2ef052e510 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 1 Sep 2004 10:41:50 +0000
Subject: [PATCH] From Tom Jolly, add detection for whether multi-texturing is
 supported before checking for number of texture units supported, using 1 as a
 fallback value

---
 src/osg/Texture.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/osg/Texture.cpp b/src/osg/Texture.cpp
index 437d932e0..ba845daea 100644
--- a/src/osg/Texture.cpp
+++ b/src/osg/Texture.cpp
@@ -1196,7 +1196,14 @@ void Texture::Extensions::setupGLExtensions()
         }
     }
 
-    glGetIntegerv(GL_MAX_TEXTURE_UNITS,&_numTextureUnits);
+    if( _isMultiTexturingSupported )
+    {
+       glGetIntegerv(GL_MAX_TEXTURE_UNITS,&_numTextureUnits);
+    }
+    else
+    {
+       _numTextureUnits = 1;
+    }
 
     _glCompressedTexImage2D = getGLExtensionFuncPtr("glCompressedTexImage2D","glCompressedTexImage2DARB");
     _glCompressedTexSubImage2D = getGLExtensionFuncPtr("glCompressedTexSubImage2D","glCompressedTexSubImage2DARB");