class DisplayBacklight
Defined at line 938 of file fidling/gen/sdk/fidl/fuchsia.ui.policy/fuchsia.ui.policy/hlcpp/fuchsia/ui/policy/cpp/fidl.h
Manipulates global policy for display backlight. Serves as the main "front
end" interface for usage by UX components; other protocols (such as
fuchsia.ui.scenic.Session and fuchsia.hardware.display.Controller) act as
implementation.
Global Scope. All displays, in all display controllers, are affected uniformly.
Effect Timing. This protocol does not guarantee a deadline by which the
minimum value is applied to a display; it is best effort.
Multiple clients. This protocol does not guarantee unique access to
manipulate display backlight functionality.
Reference. Related to fuchsia.hardware.display.Controller.
Public Members
static const char[] Name_Public Methods
void ~DisplayBacklight ()void SetMinimumRgb (uint8_t minimum_rgb, SetMinimumRgbCallback callback)Submits a new minimum color channel value for display backlight.
The valid range for a minimum value is [0, 255] (inclusive). For a new
minimum value M, each color channel's range will be limited to [M, 255].
Flow control: The caller is allowed at most one in-flight
|SetMinimumRgb| at at time. Subsequent calls must wait until the
acknowledgment returns. Non-compliance results in channel closure.