| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| library fuchsia.ui.brightness; |
| |
| /// A normalized relative brightness adjustment in the range |
| /// 0.0 (off/minimum) to 1.0 (maximum). |
| using brightness = float32; |
| |
| /// Control provides an interface to manage the brightness component. |
| [Discoverable] |
| protocol Control { |
| /// Turns the auto-brightness mode on. |
| /// SetManualBrightness will turn it off. |
| SetAutoBrightness(); |
| |
| /// Requests the current auto-brightness mode. |
| /// This call implements the Hanging Get protocol as detailed in |
| /// https://fuchsia.dev/fuchsia-src/development/api/fidl.md#delay-responses-using-hanging-gets |
| WatchAutoBrightness() -> (bool enabled); |
| |
| /// Turns auto-brightness mode off. |
| /// Used by e.g. Settings to set manual brightness using a slider |
| /// Value is in the range 0.0 to 1.0 representing min to max. |
| SetManualBrightness(brightness value); |
| |
| /// Gets the current brightness in the range 0.0 to 1.0. |
| /// This result is valid for both manual and auto-brightness modes and is typically used |
| /// to show the current brightness on a slider. |
| /// This call implements the Hanging Get protocol as detailed in |
| /// https://fuchsia.dev/fuchsia-src/development/api/fidl.md#delay-responses-using-hanging-gets |
| WatchCurrentBrightness() -> (brightness value); |
| |
| /// Sets the brightness curve as a set of points. |
| /// This will override the built-in brightness curve. |
| SetBrightnessTable(BrightnessTable table); |
| }; |
| |
| |
| /// A tuple representing a point on the auto-brightness curve |
| struct BrightnessPoint { |
| float32 ambient_lux; |
| float32 display_nits; |
| }; |
| |
| /// A set of points defining the auto-brightness curve. |
| /// They should be ordered in increasing ambient_lux |
| struct BrightnessTable { |
| vector<BrightnessPoint>:50 points; |
| }; |