Split AvaloniaNative static package

NuGet/AvaloniaNative/buildTransitive/StaticLink.Avalonia.Native.MacOSFontWarmup.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace StaticLink.Avalonia.Native;
+
+internal static class MacOSFontWarmup
+{
+    [ModuleInitializer]
+    internal static void Initialize()
+    {
+        if (!OperatingSystem.IsMacOS())
+        {
+            return;
+        }
+
+        try
+        {
+            var nsApplication = objc_getClass("NSApplication");
+            var sharedApplication = sel_registerName("sharedApplication");
+            _ = objc_msgSend(nsApplication, sharedApplication);
+
+            var nsFont = objc_getClass("NSFont");
+            var systemFontOfSize = sel_registerName("systemFontOfSize:");
+            var systemFontOfSizeWidth = sel_registerName("systemFontOfSize:width:");
+
+            _ = objc_msgSend(nsFont, systemFontOfSize, 13.0);
+            _ = objc_msgSend(nsFont, systemFontOfSizeWidth, 13.0, 0.0);
+        }
+        catch
+        {
+            // Defensive AppKit font-cache warmup must never fail application startup.
+        }
+    }
+
+    [DllImport("/usr/lib/libobjc.A.dylib", EntryPoint = "objc_getClass")]
+    private static extern IntPtr objc_getClass([MarshalAs(UnmanagedType.LPUTF8Str)] string name);
+
+    [DllImport("/usr/lib/libobjc.A.dylib", EntryPoint = "sel_registerName")]
+    private static extern IntPtr sel_registerName([MarshalAs(UnmanagedType.LPUTF8Str)] string name);
+
+    [DllImport("/usr/lib/libobjc.A.dylib", EntryPoint = "objc_msgSend")]
+    private static extern IntPtr objc_msgSend(IntPtr receiver, IntPtr selector);
+
+    [DllImport("/usr/lib/libobjc.A.dylib", EntryPoint = "objc_msgSend")]
+    private static extern IntPtr objc_msgSend(IntPtr receiver, IntPtr selector, double value);
+
+    [DllImport("/usr/lib/libobjc.A.dylib", EntryPoint = "objc_msgSend")]
+    private static extern IntPtr objc_msgSend(IntPtr receiver, IntPtr selector, double value, double width);
+}