abstract FoxTextureFilter(Int)

Use anisotropic filter with radio 16 when upsampling textures

Use anisotropic filter with radio 2 when upsampling textures

Use anisotropic filter with radio 4 when upsampling textures

Use anisotropic filter with radio 8 when upsampling textures

Use linear interpolation when upsampling textures (gives a smooth, blurry look).

Use nearest neighbor sampling when upsampling textures (gives a pixelated, sharp mosaic look).