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.PdfSharpCore.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.Diagnostics;
+using System.Collections.Generic;
+using PdfSharpCore.Drawing;
+
+namespace PdfSharpCore.Pdf.Advanced
+{
+    internal enum FontType
+    {
+        /// <summary>
+        /// TrueType with WinAnsi encoding.
+        /// </summary>
+        TrueType = 1,
+
+        /// <summary>
+        /// TrueType with Identity-H or Identity-V encoding (unicode).
+        /// </summary>
+        Type0 = 2,
+    }
+
+    /// <summary>
+    /// Contains all used fonts of a document.
+    /// </summary>
+    internal sealed class PdfFontTable : PdfResourceTable
+    {
+        /// <summary>
+        /// Initializes a new instance of this class, which is a singleton for each document.
+        /// </summary>
+        public PdfFontTable(PdfDocument document)
+            : base(document)
+        { }
+
+        /// <summary>
+        /// Gets a PdfFont from an XFont. If no PdfFont already exists, a new one is created.
+        /// </summary>
+        public PdfFont GetFont(XFont font)
+        {
+            string selector = font.Selector;
+            if (selector == null)
+            {
+                selector = ComputeKey(font); //new FontSelector(font);
+                font.Selector = selector;
+            }
+            PdfFont pdfFont;
+            if (!_fonts.TryGetValue(selector, out pdfFont))
+            {
+                if (font.Unicode)
+                    pdfFont = new PdfType0Font(Owner, font, font.IsVertical);
+                else
+                    pdfFont = new PdfTrueTypeFont(Owner, font);
+                //pdfFont.Document = _document;
+                Debug.Assert(pdfFont.Owner == Owner);
+                _fonts[selector] = pdfFont;
+            }
+            return pdfFont;
+        }
+
+#if true
+        /// <summary>
+        /// Gets a PdfFont from a font program. If no PdfFont already exists, a new one is created.
+        /// </summary>
+        public PdfFont GetFont(string idName, byte[] fontData)
+        {
+            Debug.Assert(false);
+            //FontSelector selector = new FontSelector(idName);
+            string selector = null; // ComputeKey(font); //new FontSelector(font);
+            PdfFont pdfFont;
+            if (!_fonts.TryGetValue(selector, out pdfFont))
+            {
+                //if (font.Unicode)
+                pdfFont = new PdfType0Font(Owner, idName, fontData, false);
+                //else
+                //  pdfFont = new PdfTrueTypeFont(_owner, font);
+                //pdfFont.Document = _document;
+                Debug.Assert(pdfFont.Owner == Owner);
+                _fonts[selector] = pdfFont;
+            }
+            return pdfFont;
+        }
+#endif
+
+        /// <summary>
+        /// Tries to gets a PdfFont from the font dictionary.
+        /// Returns null if no such PdfFont exists.
+        /// </summary>
+        public PdfFont TryGetFont(string idName)
+        {
+            Debug.Assert(false);
+            //FontSelector selector = new FontSelector(idName);
+            string selector = null;
+            PdfFont pdfFont;
+            _fonts.TryGetValue(selector, out pdfFont);
+            return pdfFont;
+        }
+
+        internal static string ComputeKey(XFont font)
+        {
+            XGlyphTypeface glyphTypeface = font.GlyphTypeface;
+            string key = glyphTypeface.Fontface.FullFaceName.ToLowerInvariant() +
+                (glyphTypeface.IsBold ? "/b" : "") + (glyphTypeface.IsItalic ? "/i" : "") + font.Unicode;
+            return key;
+        }
+
+        /// <summary>
+        /// Map from PdfFontSelector to PdfFont.
+        /// </summary>
+        readonly Dictionary<string, PdfFont> _fonts = new Dictionary<string, PdfFont>();
+
+        public void PrepareForSave()
+        {
+            foreach (PdfFont font in _fonts.Values)
+                font.PrepareForSave();
+        }
+    }
+}