public NegatoscopForm()
{
InitializeComponent();
_currentRamp = new Ramp
{
Red = new ushort[256],
Green = new ushort[256],
Blue = new ushort[256]
};
Win32Engine.GetDeviceGammaRamp(Win32Engine.GetDC(Handle), ref _currentRamp);
var newRamp = new Ramp
{
Red = new ushort[256],
Green = new ushort[256],
Blue = new ushort[256]
};
for (int i = 1; i < 256; i++)
{
newRamp.Red[i] = newRamp.Green[i] = newRamp.Blue[i] =
(ushort)(Math.Min(65535, Math.Max(0, Math.Pow((i + 1) / 256.0, 44 * 0.1) * 65535 + 0.5)));
}
Win32Engine.SetDeviceGammaRamp(Win32Engine.GetDC(Handle), ref newRamp);
}
private void NegatoscopForm_FormClosing(object sender, FormClosingEventArgs e)
{
Win32Engine.SetDeviceGammaRamp(Win32Engine.GetDC(Handle), ref _currentRamp);
}