setViewScale(1.00)
window size: [768, 1004]
zoom scale: 1.00

setViewScale(2.00)
window size: [384, 502]
zoom scale: 2.00

setViewScale(2.50)
window size: [307, 401]
zoom scale: 2.50

setViewScale(1.00)
window size: [768, 1004]
zoom scale: 1.00