using Ryujinx.Common.Logging; using System; using System.Drawing; using System.Globalization; using System.Runtime.InteropServices; namespace Ryujinx.Common.System { public static class ForceDpiAware { [DllImport("user32.dll")] private static extern bool SetProcessDPIAware(); private const string X11LibraryName = "libX11.so.6"; [DllImport(X11LibraryName)] private static extern IntPtr XOpenDisplay(string display); [DllImport(X11LibraryName)] private static extern IntPtr XGetDefault(IntPtr display, string program, string option); [DllImport(X11LibraryName)] private static extern int XDisplayWidth(IntPtr display, int screenNumber); [DllImport(X11LibraryName)] private static extern int XDisplayWidthMM(IntPtr display, int screenNumber); [DllImport(X11LibraryName)] private static extern int XCloseDisplay(IntPtr display); private static readonly double _standardDpiScale = 96.0; private static readonly double _maxScaleFactor = 1.25; /// /// Marks the application as DPI-Aware when running on the Windows operating system. /// public static void Windows() { // Make process DPI aware for proper window sizing on high-res screens. if (OperatingSystem.IsWindowsVersionAtLeast(6)) { SetProcessDPIAware(); } } public static double GetActualScaleFactor() { double userDpiScale = 96.0; try { if (OperatingSystem.IsWindows()) { userDpiScale = Graphics.FromHwnd(IntPtr.Zero).DpiX; } else if (OperatingSystem.IsLinux()) { string xdgSessionType = Environment.GetEnvironmentVariable("XDG_SESSION_TYPE")?.ToLower(); if (xdgSessionType == null || xdgSessionType == "x11") { IntPtr display = XOpenDisplay(null); string dpiString = Marshal.PtrToStringAnsi(XGetDefault(display, "Xft", "dpi")); if (dpiString == null || !double.TryParse(dpiString, NumberStyles.Any, CultureInfo.InvariantCulture, out userDpiScale)) { userDpiScale = (double)XDisplayWidth(display, 0) * 25.4 / (double)XDisplayWidthMM(display, 0); } XCloseDisplay(display); } else if (xdgSessionType == "wayland") { // TODO Logger.Warning?.Print(LogClass.Application, $"Couldn't determine monitor DPI: Wayland not yet supported"); } else { Logger.Warning?.Print(LogClass.Application, $"Couldn't determine monitor DPI: Unrecognised XDG_SESSION_TYPE: {xdgSessionType}"); } } } catch (Exception e) { Logger.Warning?.Print(LogClass.Application, $"Couldn't determine monitor DPI: {e.Message}"); } return userDpiScale; } public static double GetWindowScaleFactor() { double userDpiScale = GetActualScaleFactor(); return Math.Min(userDpiScale / _standardDpiScale, _maxScaleFactor); } } }