Add a new internal program parameter value STATE_TEXRECT_SCALE which

provides 1/width and 1/height of the active texture, useful for
implementing ARB_texture_rectangle support on hardware which only
supports ARB_npot-style texturing.

src/mesa/shader/program.h

@@ -188,6 +188,7 @@ enum state_index {
 
    STATE_INTERNAL,		/* Mesa additions */
    STATE_NORMAL_SCALE,
+   STATE_TEXRECT_SCALE,
    STATE_POSITION_NORMALIZED    /* normalized light position */
 };