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;
+using System.Diagnostics;
+using System.Collections.Generic;
+using PdfSharpCore.Fonts.OpenType;
+using PdfSharpCore.Pdf.Internal;
+
+namespace PdfSharpCore.Fonts
+{
+    /// <summary>
+    /// Helper class that determines the characters used in a particular font.
+    /// </summary>
+    internal class CMapInfo
+    {
+        public CMapInfo(OpenTypeDescriptor descriptor)
+        {
+            Debug.Assert(descriptor != null);
+            _descriptor = descriptor;
+        }
+        internal OpenTypeDescriptor _descriptor;
+
+        /// <summary>
+        /// Adds the characters of the specified string to the hashtable.
+        /// </summary>
+        public void AddChars(string text)
+        {
+            if (text != null)
+            {
+                bool symbol = _descriptor.FontFace.cmap.symbol;
+                int length = text.Length;
+                for (int idx = 0; idx < length; idx++)
+                {
+                    char ch = text[idx];
+                    if (!CharacterToGlyphIndex.ContainsKey(ch))
+                    {
+                        char ch2 = ch;
+                        if (symbol)
+                        {
+                            // Remap ch for symbol fonts.
+                            ch2 = (char)(ch | (_descriptor.FontFace.os2.usFirstCharIndex & 0xFF00));  // @@@ refactor
+                        }
+                        int glyphIndex = _descriptor.CharCodeToGlyphIndex(ch2);
+                        CharacterToGlyphIndex.Add(ch, glyphIndex);
+                        GlyphIndices[glyphIndex] = null;
+                        MinChar = (char)Math.Min(MinChar, ch);
+                        MaxChar = (char)Math.Max(MaxChar, ch);
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Adds the glyphIndices to the hashtable.
+        /// </summary>
+        public void AddGlyphIndices(string glyphIndices)
+        {
+            if (glyphIndices != null)
+            {
+                int length = glyphIndices.Length;
+                for (int idx = 0; idx < length; idx++)
+                {
+                    int glyphIndex = glyphIndices[idx];
+                    GlyphIndices[glyphIndex] = null;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Adds a ANSI characters.
+        /// </summary>
+        internal void AddAnsiChars()
+        {
+            byte[] ansi = new byte[256 - 32];
+            for (int idx = 0; idx < 256 - 32; idx++)
+                ansi[idx] = (byte)(idx + 32);
+            string text = PdfEncoders.WinAnsiEncoding.GetString(ansi, 0, ansi.Length);
+            AddChars(text);
+        }
+
+        internal bool Contains(char ch)
+        {
+            return CharacterToGlyphIndex.ContainsKey(ch);
+        }
+
+        public char[] Chars
+        {
+            get
+            {
+                char[] chars = new char[CharacterToGlyphIndex.Count];
+                CharacterToGlyphIndex.Keys.CopyTo(chars, 0);
+                Array.Sort(chars);
+                return chars;
+            }
+        }
+
+        public int[] GetGlyphIndices()
+        {
+            int[] indices = new int[GlyphIndices.Count];
+            GlyphIndices.Keys.CopyTo(indices, 0);
+            Array.Sort(indices);
+            return indices;
+        }
+
+        public char MinChar = char.MaxValue;
+        public char MaxChar = char.MinValue;
+        public Dictionary<char, int> CharacterToGlyphIndex = new Dictionary<char, int>();
+        public Dictionary<int, object> GlyphIndices = new Dictionary<int, object>();
+    }
+}