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Automatically scale DPI under Linux.

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This commit is contained in:
Paul Chote
2020-01-26 19:45:56 +00:00
committed by abcdefg30
parent 4203a3191f
commit 1485194ef3
1 changed files with 23 additions and 4 deletions
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27
OpenRA.Platforms.Default/Sdl2PlatformWindow.cs
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@@ -10,6 +10,8 @@
#endregion
using System;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.InteropServices;
using OpenRA.Primitives;
using SDL2;
@@ -162,10 +164,27 @@ namespace OpenRA.Platforms.Default
}
else if (Platform.CurrentPlatform != PlatformType.OSX)
{
float scale = 1;
var scaleVariable = Environment.GetEnvironmentVariable("OPENRA_DISPLAY_SCALE");
if (scaleVariable != null && float.TryParse(scaleVariable, out scale))
windowScale = scale;
// Launch the game with OPENRA_DISPLAY_SCALE to force a specific scaling factor
// Otherwise fall back to GDK_SCALE or parsing the x11 DPI configuration
var scaleVariable = Environment.GetEnvironmentVariable("OPENRA_DISPLAY_SCALE") ?? Environment.GetEnvironmentVariable("GDK_SCALE");
if (scaleVariable == null || !float.TryParse(scaleVariable, NumberStyles.Float, NumberFormatInfo.InvariantInfo, out windowScale))
{
// Attempt to automatically detect DPI
try
{
var psi = new ProcessStartInfo("/usr/bin/xrdb", "-query");
psi.UseShellExecute = false;
psi.RedirectStandardOutput = true;
var p = Process.Start(psi);
var lines = p.StandardOutput.ReadToEnd().Split('\n');
int dpi;
foreach (var line in lines)
if (line.StartsWith("Xft.dpi") && int.TryParse(line.Substring(8), out dpi))
windowScale = dpi / 96f;
}
catch { }
}
}
Console.WriteLine("Desktop resolution: {0}x{1}", display.w, display.h);