Constant glitter::texture::LINEAR_MIPMAP_NEAREST

pub const LINEAR_MIPMAP_NEAREST: TextureMipmapFilter = TextureMipmapFilter::MipmapFilter{criterion: TextureFilter::Linear,
                                  mipmap: TextureFilter::Nearest,}

When texturing a pixel, select the mipmap that is nearest in size to the pixel, select the four texels that are closest to the center of the pixel, and compute the result by taking the weighted average of each texel.