New built-in plugin FontViewer

QuickLook.Plugin/QuickLook.Plugin.FontViewer/FreeTypeDllMap.cs

@@ -0,0 +1,71 @@
+// Copyright © 2024 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+namespace QuickLook.Plugin.FontViewer;
+
+/// <summary>
+/// To implement a similar architecture detection logic in .NET Framework
+/// https://github.com/ryancheung/FreeTypeSharp/blob/main/FreeTypeSharp/FT.DllMap.cs
+/// </summary>
+internal static class FreeTypeDllMap
+{
+    public static void LoadNativeLibrary()
+    {
+        _ = ImportResolver();
+    }
+
+    private static nint ImportResolver()
+    {
+        string actualLibraryName = "freetype.dll";
+        string rootDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+        string arch = (RuntimeInformation.OSArchitecture == Architecture.Arm64)
+            ? "arm64"
+            : (Environment.Is64BitProcess ? "x64" : "x86");
+
+        var searchPaths = new[]
+        {
+            // This is where native libraries in our nupkg should end up
+            Path.Combine(rootDirectory, "runtimes", "win-" + arch, "native"),
+            Path.Combine(rootDirectory, "runtimes", "win-" + arch),
+            Path.Combine(rootDirectory, "win-" + arch),
+            Path.Combine(rootDirectory, arch),
+            Path.Combine(rootDirectory)
+        };
+
+        foreach (var searchPath in searchPaths)
+        {
+            SetDllDirectory(searchPath);
+            nint handle = LoadLibrary(Path.Combine(searchPath, actualLibraryName));
+
+            if (handle != IntPtr.Zero)
+                return handle;
+        }
+
+        return IntPtr.Zero;
+    }
+
+    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
+    private static extern nint LoadLibrary(string lpFileName);
+
+    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
+    private static extern bool SetDllDirectory(string lpPathName);
+}