New built-in plugin FontViewer

QuickLook.Plugin/QuickLook.Plugin.FontViewer/FreeTypeApi.cs

@@ -0,0 +1,51 @@
+// 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 FreeTypeSharp;
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using static FreeTypeSharp.FT;
+
+namespace QuickLook.Plugin.FontViewer;
+
+internal unsafe static class FreeTypeApi
+{
+    static FreeTypeApi()
+    {
+        FreeTypeDllMap.LoadNativeLibrary();
+    }
+
+    public static string GetFontFamilyName(string path)
+    {
+        if (!File.Exists(path)) return null;
+
+        FT_LibraryRec_* lib;
+        FT_FaceRec_* face;
+        FT_Error error = FT_Init_FreeType(&lib);
+
+        error = FT_New_Face(lib, (byte*)Marshal.StringToHGlobalAnsi(path), IntPtr.Zero, &face);
+
+        if (error == FT_Error.FT_Err_Ok)
+        {
+            var familyName = Marshal.PtrToStringAnsi((nint)face->family_name);
+            return familyName;
+        }
+
+        return null;
+    }
+}