The ES2 setup code checks for the presence of the GL_OES_texture_float extension non GLES platforms and attempts to use floating point textures for the DisplacementMap effect, but unfortunately something about the way that we set up the texture results in that effect being a NOP.

RT-24500 complains about the DisplacementMap effect failing completely on BeagleBoard. In order to fix that bug we will fall back to a software implementation of DisplacementMap, but we should fix our usage of the GL_OES_texture_float extension in order to allow hardware acceleration of that effect on the embedded platforms.