beging np2 extension check work.
diff --git a/rsContext.cpp b/rsContext.cpp
index dec993a..cc3a74f 100644
--- a/rsContext.cpp
+++ b/rsContext.cpp
@@ -546,6 +546,8 @@
 
             glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &mGL.mMaxFragmentTextureImageUnits);
             glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_VECTORS, &mGL.mMaxFragmentUniformVectors);
+
+            mGL.OES_texture_npot = NULL != strstr((const char *)mGL.mExtensions, "GL_OES_texture_npot");
         }
 
     }