def _set_pwm(self):
"""
Set pwm values for current settings.
"""
# adjust color brightness
color = Color(self._color.r * self._brightness / 255,
self._color.g * self._brightness / 255,
self._color.b * self._brightness / 255)
# pwm goes to 0% if led is not on
if not self._is_on:
color = Color(0, 0, 0)
# gamma correction?
if self._gamma != 1.0:
# gamma correction with output sized for 12-bit pwm
pwmValues = color.gamma(gamma=GAMMA, max=4095)
else:
# size output for 12-bit pmw with NO gamma correction
pwmValues = [(x * 4096 / 255) for x in color]
# scale pwm values based on scale factors
pwmValues[0] = round(pwmValues[0] * self._scaleR)
pwmValues[1] = round(pwmValues[1] * self._scaleG)
pwmValues[2] = round(pwmValues[2] * self._scaleB)
# finally set the pwm values
self._device.set_multiple_pwm(pwmValues)
