ExposureState

fun getExposureCompensationIndex(): Int

Get the current exposure compensation index.

The exposure value (EV) is the compensation index multiplied by the step value which is given by getExposureCompensationStep. Increasing the compensation index by using the setExposureCompensationIndex will increase exposure making the capture result brighter, decreasing the value making it darker.

For example, if the exposure value (EV) step size is 0.333, set the exposure compensation index value '6' will mean an exposure compensation of +2 EV; -3 will mean an exposure compensation of -1 EV.

The exposure value resets to default when there is no UseCase associated with the camera. For example, unbind all use cases from the camera or when the lifecycle changed that all the use case stopping data from the camera.

fun getExposureCompensationRange(): Range<Int!>

Get the maximum and minimum exposure compensation values for setExposureCompensationIndex

The actual exposure value (EV) range that supported by the camera can be calculated by multiplying the getExposureCompensationStep with the maximum and minimum values:

Min.exposure compensation * getExposureCompensationStep <= minimum supported EV

Max.exposure compensation * getExposureCompensationStep >= maximum supported EV

fun getExposureCompensationStep(): Rational

Get the smallest step by which the exposure compensation can be changed.

fun isExposureCompensationSupported(): Boolean

Whether exposure compensation is supported for this camera.