xres <===========> TEP
yres <===========> Tvd
left_margin <===========> Thf
right_margin <===========> Thb
hsync_len <===========> THS
upper_margin <===========> Tvf
lower_margin <===========> Tvb
vsync_len <===========> Tvs
从起点,到尽头,也许快乐,或有时孤独,