#ifndef screenblanker_H
#define screenblanker_H

/* C header file for ScreenBlanker
 * written by DefMod (Dec 31 2005) on Sat Dec 31 14:05:29 2005
 * Jonathan Coxhead, jonathan@doves.demon.co.uk, 12 May 1995
 */

/*OSLib---efficient, type-safe, transparent, extensible,
   register-safe A P I coverage of RISC O S*/
/*Copyright © 1994 Jonathan Coxhead*/

/*
      OSLib is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 1, or (at your option)
   any later version.

      OSLib is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
   along with this programme; if not, write to the Free Software
   Foundation, Inc, 675 Mass Ave, Cambridge, MA 02139, U S A.
*/

#ifndef types_H
#include "oslib/types.h"
#endif

#ifndef os_H
#include "oslib/os.h"
#endif

#if defined NAMESPACE_OSLIB
  namespace OSLib {
#endif

/**********************************
 * SWI names and SWI reason codes *
 **********************************/
#undef  ScreenBlanker_Control
#define ScreenBlanker_Control                   0x43100
#undef  XScreenBlanker_Control
#define XScreenBlanker_Control                  0x63100
#undef  Service_ScreenBlanked
#define Service_ScreenBlanked                   0x7A
#undef  Service_ScreenRestored
#define Service_ScreenRestored                  0x7B

/*************************
 * Function declarations *
 *************************/

#ifdef __cplusplus
   extern "C" {
#endif

/* ------------------------------------------------------------------------
 * Function:      service_screen_blanked()
 *
 * Description:   Screen blanked by screen blanker
 *
 * Other notes:   Calls SWI 0x30 with R1 = 0x7A.
 */

extern os_error *xservice_screen_blanked (void);
extern void service_screen_blanked (void);

/* ------------------------------------------------------------------------
 * Function:      service_screen_restored()
 *
 * Description:   Screen restored by screen blanker
 *
 * Input:         x - value of R0 on entry
 *
 * Other notes:   Calls SWI 0x30 with R1 = 0x7B.
 */

extern os_error *xservice_screen_restored (int x);
extern void service_screen_restored (int x);

#ifdef __cplusplus
   }
#endif

#if defined NAMESPACE_OSLIB
  } 
#endif

#endif
