Texture:getFilter
Gets the filter mode of the Texture.
min, mag, anisotropy = Texture:getFilter()
min FilterMode Filter mode to use when minifying the texture (rendering it at a smaller size on-screen than its size in pixels).
mag FilterMode Filter mode to use when magnifying the texture (rendering it at a smaller size on-screen than its size in pixels).
anisotropy number Maximum amount of anisotropic filtering used.