public Monitor(IntPtr hMonitor, IntPtr hdcMonitor)
{
_hMonitor = hMonitor;
_hdcMonitor = hdcMonitor;
Log.Info($"Create monitor hMonitor:{_hMonitor} hdcMonitor:{_hdcMonitor}");
// Get the current brightness
try
{
SupportBrightness = true;
if (!MonitorMethods.GetNumberOfPhysicalMonitorsFromHMONITOR(_hMonitor, ref _physicalMonitorsCount))
{
throw new ApplicationException($"Cannot GetNumberOfPhysicalMonitorsFromHMONITOR for hmonitor {_hMonitor}");
}
_physicalMonitors = new MonitorStructures.PhysicalMonitor[_physicalMonitorsCount];
if (!MonitorMethods.GetPhysicalMonitorsFromHMONITOR(_hMonitor, _physicalMonitorsCount, _physicalMonitors))
{
throw new ApplicationException($"Cannot GetPhysicalMonitorsFromHMONITOR for hmonitor {_hMonitor}");
}
InitialBrightness = GetBrightness();
foreach (var monitor in _physicalMonitors)
{
Log.Info($"Monitor physicalmonitor handle:{monitor.hPhysicalMonitor} description:{monitor.szPhysicalMonitorDescription} with brightness {InitialBrightness}");
}
}
catch (Exception err)
{
Log.Log(LogLevel.Error, err, "Unable to get brightness. Brightness will not be supported.");
SupportBrightness = false;
}
// Get the current gamma Ramp
try
{
_linearGammaRamp = GetDefaultGammaRamp();
SetDeviceGammaRamp(_hdcMonitor, ref _linearGammaRamp);
}
catch (Exception err)
{
Log.Log(LogLevel.Error, err, "Unable to get base gamma ramp");
}
}
public void SetColorProfile(ColorAdjustment adjustment, int gamma)
{
Log.Info($"SetColorProfile {adjustment}, gamma {gamma}");
if (gamma <= 256 && gamma >= 1)
{
var ramp = new GammaRamp {
Red = new ushort[256], Green = new ushort[256], Blue = new ushort[256]
};
for (int i = 1; i < 256; i++)
{
ushort r, g, b;
if (_linearGammaRamp.Red == null)
{
r = (ushort)(i * (gamma + 128));
}
else
{
r = _linearGammaRamp.Red[i];
}
if (_linearGammaRamp.Blue == null)
{
b = (ushort)(i * (gamma + 128));
}
else
{
b = _linearGammaRamp.Blue[i];
}
if (_linearGammaRamp.Green == null)
{
g = (ushort)(i * (gamma + 128));
}
else
{
g = _linearGammaRamp.Green[i];
}
ramp.Red[i] = (ushort)(r * adjustment.Red);
ramp.Green[i] = (ushort)(g * adjustment.Green);
ramp.Blue[i] = (ushort)(b * adjustment.Blue);
}
var success = SetDeviceGammaRamp(_hdcMonitor, ref ramp);
Log.Debug($"SetDeviceGammaRamp {_hdcMonitor} with result {success}");
}
}
public static GammaRamp GetDefaultGammaRamp()
{
var result = new GammaRamp
{
Red = new ushort[256],
Blue = new ushort[256],
Green = new ushort[256]
};
for (var n = 0; n < 256; n++)
{
var value = (ushort)((n / 255d) * ushort.MaxValue);
result.Red[n] = result.Blue[n] = result.Green[n] = value;
}
return(result);
}
public static extern bool SetDeviceGammaRamp(IntPtr hDc, ref GammaRamp lpGammaRamp);