| # Brightness # |
| |
| Brightness comprises Brightness Manager which serves brightness.fidl, |
| the Color Tint module which serves color_tint.fidl and a color |
| adjustment service which uses color_adjustment.fidl. |
| |
| # FIDLs # |
| |
| ## brightness.fidl ## |
| |
| The FIDL interface in brightness.fidl is typically used by the settings |
| component to tell it what to do. The settings component will use this |
| interface to control brightness. |
| |
| This component manages the screen backlight. It has two modes |
| auto-brightness and manual. |
| |
| This interface will typically be used by the brightness UI but will |
| support concurrent users. |
| |
| ### Auto-brightness Mode ### |
| In this mode the brightness polls the light sensor and sets the |
| backlight as appropriate, darker as the sensor gets less light and |
| brighter as it gets more. |
| |
| ### Manual Mode ### |
| In manual mode the backlight remains at a fixed brightness until the |
| brightness component is told to set the backlight to another brightness |
| or auto-brightness mode is turned on. |
| |
| ### Notes ### |
| The brightness component always ensures that the screen backlight |
| changes smoothly over short period of time. This means that the |
| calling application can abruptly change the screen brightness |
| without having to worry about making the user jump! |
| |
| ## color_adjustment.fidl ## |
| |
| The FIDL interface in color_adjustment.fidl is used by a component to |
| provide a handle so that color adjustment matrices can be sent |
| at will. |
| |
| ## color_tint.fidl ## |
| |
| The FIDL interface in color_tint.fidl is used to ask a color tinting |
| component to convert a light sensor reading to a screen tint. |
