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.IO;
+
+namespace PdfSharpCore.Drawing
+{
+    /// <summary>
+    /// Provides functionality to save a bitmap image in a specific format.
+    /// </summary>
+    public abstract class XBitmapEncoder
+    {
+        internal XBitmapEncoder()
+        {
+            // Prevent external deriving.
+        }
+
+        /// <summary>
+        /// Gets a new instance of the PNG image encoder.
+        /// </summary>
+        public static XBitmapEncoder GetPngEncoder()
+        {
+            return new XPngBitmapEncoder();
+        }
+
+        /// <summary>
+        /// Gets or sets the bitmap source to be encoded.
+        /// </summary>
+        public XBitmapSource Source
+        {
+            get { return _source; }
+            set { _source = value; }
+        }
+        XBitmapSource _source;
+
+        /// <summary>
+        /// When overridden in a derived class saves the image on the specified stream
+        /// in the respective format.
+        /// </summary>
+        public abstract void Save(Stream stream);
+    }
+
+    internal sealed class XPngBitmapEncoder : XBitmapEncoder
+    {
+        internal XPngBitmapEncoder()
+        { }
+
+        /// <summary>
+        /// Saves the image on the specified stream in PNG format.
+        /// </summary>
+        public override void Save(Stream stream)
+        {
+            if (Source == null)
+                throw new InvalidOperationException("No image source.");
+        }
+    }
+}