/** @file
  Simple Pointer protocol from the UEFI 2.0 specification.

  Abstraction of a very simple pointer device like a mouse or trackball.

  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials                          
  are licensed and made available under the terms and conditions of the BSD License         
  which accompanies this distribution.  The full text of the license may be found at        
  http://opensource.org/licenses/bsd-license.php                                            

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

**/

#ifndef __SIMPLE_POINTER_H__
#define __SIMPLE_POINTER_H__

#define EFI_SIMPLE_POINTER_PROTOCOL_GUID \
  { \
    0x31878c87, 0xb75, 0x11d5, {0x9a, 0x4f, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
  }

typedef struct _EFI_SIMPLE_POINTER_PROTOCOL  EFI_SIMPLE_POINTER_PROTOCOL;

//
// Data structures
//
typedef struct {
  ///
  /// The signed distance in counts that the pointer device has been moved along the x-axis.
  ///
  INT32   RelativeMovementX;
  ///
  /// The signed distance in counts that the pointer device has been moved along the y-axis.
  ///
  INT32   RelativeMovementY;
  ///
  /// The signed distance in counts that the pointer device has been moved along the z-axis.
  ///
  INT32   RelativeMovementZ;
  ///
  /// If TRUE, then the left button of the pointer device is being
  /// pressed. If FALSE, then the left button of the pointer device is not being pressed.
  ///
  BOOLEAN LeftButton;
  ///
  /// If TRUE, then the right button of the pointer device is being
  /// pressed. If FALSE, then the right button of the pointer device is not being pressed.
  ///
  BOOLEAN RightButton;
} EFI_SIMPLE_POINTER_STATE;

typedef struct {
  ///
  /// The resolution of the pointer device on the x-axis in counts/mm.
  /// If 0, then the pointer device does not support an x-axis.
  ///
  UINT64  ResolutionX;
  ///
  /// The resolution of the pointer device on the y-axis in counts/mm.
  /// If 0, then the pointer device does not support an x-axis.
  ///
  UINT64  ResolutionY;
  ///
  /// The resolution of the pointer device on the z-axis in counts/mm.
  /// If 0, then the pointer device does not support an x-axis.
  ///
  UINT64  ResolutionZ;
  ///
  /// TRUE if a left button is present on the pointer device. Otherwise FALSE.
  ///
  BOOLEAN LeftButton;
  ///
  /// TRUE if a right button is present on the pointer device. Otherwise FALSE.
  ///
  BOOLEAN RightButton;
} EFI_SIMPLE_POINTER_MODE;

/**                                                                 
  Resets the pointer device hardware.
    
  @param  This                  A pointer to the EFI_SIMPLE_POINTER_PROTOCOL
                                instance.                                   
  @param  ExtendedVerification  Indicates that the driver may perform a more exhaustive
                                verification operation of the device during reset.                                       
                                
  @retval EFI_SUCCESS           The device was reset.
  @retval EFI_DEVICE_ERROR      The device is not functioning correctly and could not be reset.  
                                   
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SIMPLE_POINTER_RESET)(
  IN EFI_SIMPLE_POINTER_PROTOCOL            *This,
  IN BOOLEAN                                ExtendedVerification
  );

/**                                                                 
  Retrieves the current state of a pointer device.
    
  @param  This                  A pointer to the EFI_SIMPLE_POINTER_PROTOCOL
                                instance.                                   
  @param  State                 A pointer to the state information on the pointer device.
                                
  @retval EFI_SUCCESS           The state of the pointer device was returned in State.
  @retval EFI_NOT_READY         The state of the pointer device has not changed since the last call to
                                GetState().                                                           
  @retval EFI_DEVICE_ERROR      A device error occurred while attempting to retrieve the pointer device's
                                current state.                                                           
                                   
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SIMPLE_POINTER_GET_STATE)(
  IN EFI_SIMPLE_POINTER_PROTOCOL          *This,
  IN OUT EFI_SIMPLE_POINTER_STATE         *State
  );

///
/// The EFI_SIMPLE_POINTER_PROTOCOL provides a set of services for a pointer 
/// device that can use used as an input device from an application written 
/// to this specification. The services include the ability to reset the 
/// pointer device, retrieve get the state of the pointer device, and 
/// retrieve the capabilities of the pointer device.
///
struct _EFI_SIMPLE_POINTER_PROTOCOL {
  EFI_SIMPLE_POINTER_RESET      Reset;
  EFI_SIMPLE_POINTER_GET_STATE  GetState;
  ///
  /// Event to use with WaitForEvent() to wait for input from the pointer device.
  ///
  EFI_EVENT                     WaitForInput;
  ///
  /// Pointer to EFI_SIMPLE_POINTER_MODE data.
  ///
  EFI_SIMPLE_POINTER_MODE       *Mode;
};

extern EFI_GUID gEfiSimplePointerProtocolGuid;

#endif
