From Art Trevs, "Features of the patch are:

- Implementation of integer textures as in EXT_texture_integer

- setBorderColor(Vec4) changed to setBorderColor(Vec4d) to pass double values
as border color. (Probably we have to provide an overloading function to
still support Vec4f ?)

- new method Texture::getInternalFormatType() added. Gives information if the
internal format normalized, float, signed integer or unsigned integer. Can
help people to write better code ;-)

"

Futher changes to this submission by Robert Osfield, changed the dirty mipmap
flag into a buffer_value<> vector to ensure safe handling of multiple contexts.

include/osg/TextureRectangle

@@ -127,6 +127,7 @@ class OSG_EXPORT TextureRectangle : public Texture
         virtual ~TextureRectangle();
 
         virtual void computeInternalFormat() const;
+        void allocateMipmap(State& state) const;
 
         void applyTexParameters(GLenum target, State& state) const;