click canvas to switch texture
0th magFilter: NEAREST minFilter: NEAREST
1th magFilter: LINEAR minFilter: LINEAR
2th magFilter: LINEAR minFilter: NEAREST_MIPMAP_NEAREST
3th magFilter: LINEAR minFilter: LINEAR_MIPMAP_NEAREST
4th magFilter: LINEAR minFilter: NEAREST_MIPMAP_LINEAR
5th magFilter: LINEAR minFilter: LINEAR_MIPMAP_LINEAR
ps: minFilter: pixel < texel. magFIlter: pixel > texel.