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.Text;
+
+namespace PdfSharpCore.Pdf.Internal
+{
+    /// <summary>
+    /// An encoder for Unicode strings. 
+    /// (That means, a character represents a glyph index.)
+    /// </summary>
+    internal sealed class RawUnicodeEncoding : Encoding
+    {
+        public RawUnicodeEncoding()
+        { }
+
+        public override int GetByteCount(char[] chars, int index, int count)
+        {
+            // Each character represents exactly an ushort value, which is a glyph index.
+            return 2 * count;
+        }
+
+        public override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex)
+        {
+            for (int count = charCount; count > 0; charIndex++, count--)
+            {
+                char ch = chars[charIndex];
+                bytes[byteIndex++] = (byte)(ch >> 8);
+                bytes[byteIndex++] = (byte)ch;
+            }
+            return charCount * 2;
+        }
+
+        public override int GetCharCount(byte[] bytes, int index, int count)
+        {
+            return count / 2;
+        }
+
+        public override int GetChars(byte[] bytes, int byteIndex, int byteCount, char[] chars, int charIndex)
+        {
+            for (int count = byteCount; count > 0; byteIndex += 2, charIndex++, count -= 2)
+            {
+                chars[charIndex] = (char)((int)(bytes[byteIndex] << 8) + (int)bytes[byteIndex + 1]);
+            }
+            return byteCount;
+        }
+
+        public override int GetMaxByteCount(int charCount)
+        {
+            return charCount * 2;
+        }
+
+        public override int GetMaxCharCount(int byteCount)
+        {
+            return byteCount / 2;
+        }
+    }
+}