vendor: import KillerPDF 1.7.5 source (GPL-3.0) as the base for MMD PDF

2026-08-27 06:58:22 +02:00
commit 532485a830
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+#region PDFsharp - A .NET library for processing PDF
+//
+// Authors:
+//   Stefan Lange
+//
+// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (Germany)
+//
+// http://www.PdfSharp.com
+// http://sourceforge.net/projects/pdfsharp
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+// DEALINGS IN THE SOFTWARE.
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Text;
+using PdfSharpCore.Fonts;
+using PdfSharpCore.Fonts.OpenType;
+using PdfSharpCore.Internal;
+using PdfSharpCore.Pdf;
+
+namespace PdfSharpCore.Drawing
+{
+    /// <summary>
+    /// Global cache of all internal font family objects.
+    /// </summary>
+    internal sealed class FontFamilyCache
+    {
+        FontFamilyCache()
+        {
+            _familiesByName = new Dictionary<string, FontFamilyInternal>(StringComparer.OrdinalIgnoreCase);
+        }
+
+        public static FontFamilyInternal GetFamilyByName(string familyName)
+        {
+            try
+            {
+                Lock.EnterFontFactory();
+                FontFamilyInternal family;
+                Singleton._familiesByName.TryGetValue(familyName, out family);
+                return family;
+            }
+            finally { Lock.ExitFontFactory(); }
+        }
+
+        /// <summary>
+        /// Caches the font family or returns a previously cached one.
+        /// </summary>
+        public static FontFamilyInternal CacheOrGetFontFamily(FontFamilyInternal fontFamily)
+        {
+            try
+            {
+                Lock.EnterFontFactory();
+                // Recall that a font family is uniquely identified by its case insensitive name.
+                FontFamilyInternal existingFontFamily;
+                if (Singleton._familiesByName.TryGetValue(fontFamily.Name, out existingFontFamily))
+                {
+#if DEBUG_
+                    if (fontFamily.Name == "xxx")
+                        fontFamily.GetType();
+#endif
+                    return existingFontFamily;
+                }
+                Singleton._familiesByName.Add(fontFamily.Name, fontFamily);
+                return fontFamily;
+            }
+            finally { Lock.ExitFontFactory(); }
+        }
+
+        /// <summary>
+        /// Gets the singleton.
+        /// </summary>
+        static FontFamilyCache Singleton
+        {
+            get
+            {
+                // ReSharper disable once InvertIf
+                if (_singleton == null)
+                {
+                    try
+                    {
+                        Lock.EnterFontFactory();
+                        if (_singleton == null)
+                            _singleton = new FontFamilyCache();
+                    }
+                    finally { Lock.ExitFontFactory(); }
+                }
+                return _singleton;
+            }
+        }
+        static volatile FontFamilyCache _singleton;
+
+        internal static string GetCacheState()
+        {
+            StringBuilder state = new StringBuilder();
+            state.Append("====================\n");
+            state.Append("Font families by name\n");
+            Dictionary<string, FontFamilyInternal>.KeyCollection familyKeys = Singleton._familiesByName.Keys;
+            int count = familyKeys.Count;
+            string[] keys = new string[count];
+            familyKeys.CopyTo(keys, 0);
+            Array.Sort(keys, StringComparer.OrdinalIgnoreCase);
+            foreach (string key in keys)
+                state.AppendFormat("  {0}: {1}\n", key, Singleton._familiesByName[key].DebuggerDisplay);
+            state.Append("\n");
+            return state.ToString();
+        }
+
+        /// <summary>
+        /// Maps family name to internal font family.
+        /// </summary>
+        readonly Dictionary<string, FontFamilyInternal> _familiesByName;
+    }
+}