1 files changed, 96 insertions, 0 deletions
diff --git a/xbmc/windowing/X11/X11DPMSSupport.cpp b/xbmc/windowing/X11/X11DPMSSupport.cpp
new file mode 100644
index 0000000..7512bfa
--- /dev/null
+++ b/xbmc/windowing/X11/X11DPMSSupport.cpp
@@ -0,0 +1,96 @@
+/*
+ *  Copyright (C) 2009-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "X11DPMSSupport.h"
+
+#include "ServiceBroker.h"
+#include "utils/log.h"
+#include "windowing/X11/WinSystemX11.h"
+
+#include <X11/Xlib.h>
+#include <X11/extensions/dpms.h>
+
+using namespace KODI::WINDOWING::X11;
+
+namespace
+{
+// Mapping of PowerSavingMode to X11's mode constants.
+const CARD16 X_DPMS_MODES[] =
+{
+  DPMSModeStandby,
+  DPMSModeSuspend,
+  DPMSModeOff
+};
+}
+
+CX11DPMSSupport::CX11DPMSSupport()
+{
+  CWinSystemX11* winSystem = dynamic_cast<CWinSystemX11*>(CServiceBroker::GetWinSystem());
+  if (!winSystem)
+    return;
+
+  Display* dpy = winSystem->GetDisplay();
+  if (!dpy)
+    return;
+
+  int event_base, error_base; // we ignore these
+  if (!DPMSQueryExtension(dpy, &event_base, &error_base))
+  {
+    CLog::Log(LOGINFO, "DPMS: X11 extension not present, power-saving will not be available");
+    return;
+  }
+
+  if (!DPMSCapable(dpy))
+  {
+    CLog::Log(LOGINFO, "DPMS: display does not support power-saving");
+    return;
+  }
+
+  m_supportedModes.push_back(SUSPEND); // best compromise
+  m_supportedModes.push_back(OFF); // next best
+  m_supportedModes.push_back(STANDBY); // rather lame, < 80% power according to DPMS spec
+}
+
+bool CX11DPMSSupport::EnablePowerSaving(PowerSavingMode mode)
+{
+  CWinSystemX11* winSystem = dynamic_cast<CWinSystemX11*>(CServiceBroker::GetWinSystem());
+  if (!winSystem)
+    return false;
+
+  Display* dpy = winSystem->GetDisplay();
+  if (!dpy)
+    return false;
+
+  // This is not needed on my ATI Radeon, but the docs say that DPMSForceLevel
+  // after a DPMSDisable (from SDL) should not normally work.
+  DPMSEnable(dpy);
+  DPMSForceLevel(dpy, X_DPMS_MODES[mode]);
+  // There shouldn't be any errors if we called DPMSEnable; if they do happen,
+  // they're asynchronous and messy to detect.
+  XFlush(dpy);
+  return true;
+}
+
+bool CX11DPMSSupport::DisablePowerSaving()
+{
+  CWinSystemX11* winSystem = dynamic_cast<CWinSystemX11*>(CServiceBroker::GetWinSystem());
+  if (!winSystem)
+    return false;
+
+  Display* dpy = winSystem->GetDisplay();
+  if (!dpy)
+    return false;
+
+  DPMSForceLevel(dpy, DPMSModeOn);
+  DPMSDisable(dpy);
+  XFlush(dpy);
+
+  winSystem->RecreateWindow();
+
+  return true;
+}