/// <summary>
/// Detects the environment.
/// </summary>
/// <returns>X11ScreensUserSettings.</returns>
public static X11ScreensUserSettings DetectEnvironment()
{
var globalFactor = Environment.GetEnvironmentVariable("AVALONIA_GLOBAL_SCALE_FACTOR");
var screenFactors = Environment.GetEnvironmentVariable("AVALONIA_SCREEN_SCALE_FACTORS");
if (globalFactor == null && screenFactors == null)
{
return(null);
}
var rv = new X11ScreensUserSettings
{
GlobalScaleFactor = TryParse(globalFactor) ?? 1
};
try
{
if (!string.IsNullOrWhiteSpace(screenFactors))
{
rv.NamedScaleFactors = screenFactors.Split(';').Where(x => !string.IsNullOrWhiteSpace(x))
.Select(x => x.Split('=')).ToDictionary(x => x[0],
x => double.Parse(x[1], CultureInfo.InvariantCulture));
}
}
catch
{
//Ignore
}
return(rv);
}
/// <summary>
/// Initializes a new instance of the <see cref="Randr15ScreensImpl" /> class.
/// </summary>
/// <param name="platform">The platform.</param>
/// <param name="settings">The settings.</param>
public Randr15ScreensImpl(AvaloniaX11Platform platform, X11ScreensUserSettings settings)
{
_settings = settings;
_x11 = platform.Info;
_window = CreateEventWindow(platform, OnEvent);
XRRSelectInput(_x11.Display, _window, RandrEventMask.RRScreenChangeNotify);
}
/// <summary>
/// Initializes the specified platform.
/// </summary>
/// <param name="platform">The platform.</param>
/// <returns>IX11Screens.</returns>
public static IX11Screens Init(AvaloniaX11Platform platform)
{
var info = platform.Info;
var settings = X11ScreensUserSettings.Detect();
var impl = (info.RandrVersion != null && info.RandrVersion >= new Version(1, 5))
? new Randr15ScreensImpl(platform, settings)
: (IX11Screens) new FallbackScreensImpl(info, settings);
return(impl);
}
/// <summary>
/// Initializes a new instance of the <see cref="FallbackScreensImpl" /> class.
/// </summary>
/// <param name="info">The information.</param>
/// <param name="settings">The settings.</param>
public FallbackScreensImpl(X11Info info, X11ScreensUserSettings settings)
{
if (XGetGeometry(info.Display, info.RootWindow, out var geo))
{
Screens = UpdateWorkArea(info,
new[]
{
new X11Screen(new PixelRect(0, 0, geo.width, geo.height), true, "Default", null,
settings.GlobalScaleFactor)
});
}
else
{
Screens = new[]
{
new X11Screen(new PixelRect(0, 0, 1920, 1280), true, "Default", null,
settings.GlobalScaleFactor)
};
}
}
