/*
Copyright_License {

  XCSoar Glide Computer - http://www.xcsoar.org/
  Copyright (C) 2000-2014 The XCSoar Project
  A detailed list of copyright holders can be found in the file "AUTHORS".

  This program 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 2
  of the License, or (at your option) any later version.

  This program 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 program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
}
*/

#include "BlankDisplay.hpp"

#ifdef HAVE_HARDWARE_BLANK

#include "Screen/RootDC.hpp"
#include "VideoPower.h"

#include <windows.h>

bool
Display::BlankSupported()
{
  RootDC dc;
  int i = SETPOWERMANAGEMENT;
  return ExtEscape(dc, QUERYESCSUPPORT,
                   sizeof(i), (LPCSTR)&i, 0, nullptr) > 0;
}

bool
Display::Blank(bool blank)
{
  RootDC dc;

  VIDEO_POWER_MANAGEMENT vpm;
  vpm.Length = sizeof(vpm);
  vpm.DPMSVersion = 0x0001;
  vpm.PowerState = blank ? VideoPowerOff : VideoPowerOn;

  return ExtEscape(dc, SETPOWERMANAGEMENT,
                   sizeof(vpm), (LPCSTR)&vpm, 0, nullptr) > 0;
}

#endif /* HAVE_HARDWARE_BLANK */
