DisplayServer

BootBlit Buffer Notice PoweringUp ReinitializeClass ResetContrast SetBuffer

Attributes

Contrast DisplayEnabled

Fields

instance DisplayServer tag;
        enabled: false;
   microampLoad: 0;
   monitorTimer: nilObject;
  monitorPeriod: 0;
referenceTemperature: 0;
referenceContrast: 0;
lastThermistorAtoDValue: 0;
lastThermistorTemperature: 0;
       contrast: 0;
end instance;

#endif
Define Class DisplayServer;
    inherits from Server;
    inherits from HasReinitialize, WantsPowerEvents, UsesExtraPower;

    field monitorTimer: Timer;
    field monitorPeriod: Unsigned;
    field referenceTemperature: Unsigned;
    field referenceContrast: Fixed;
    field lastThermistorAtoDValue: Unsigned;
    field lastThermistorTemperature: Unsigned;
    field contrast: Fixed;
    
#ifdef SOFTWARE_CONTRAST_CONTROL
    overrides ReinitializeClass;
    overrides Notice;
#endif

    overrides PoweringUp;

    intrinsic BootBlit(parameters: ReadOnlyPointer);

    class operation Buffer(): Pointer;
    class operation SetBuffer(pixels: Pointer; depth: UnsignedShort);

    attribute DisplayEnabled: Boolean;
        // turn on or off LCD
    attribute Contrast: Fixed, safe, common;
    operation ResetContrast();
        // reset LCD contrast back to factory value
end class;