123 lines
3.6 KiB
C#
123 lines
3.6 KiB
C#
#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Diagnostics;
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using System.IO;
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using PdfSharp.Internal;
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#if CORE
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#endif
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#if CORE_WITH_GDI
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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#endif
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#if GDI
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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#endif
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#if WPF
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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#endif
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#if NETFX_CORE
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using Windows.UI.Xaml.Media.Imaging;
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#endif
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namespace PdfSharp.Drawing
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{
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/// <summary>
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/// Provides functionality to save a bitmap image in a specific format.
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/// </summary>
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public abstract class XBitmapEncoder
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{
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internal XBitmapEncoder()
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{
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// Prevent external deriving.
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}
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/// <summary>
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/// Gets a new instance of the PNG image encoder.
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/// </summary>
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public static XBitmapEncoder GetPngEncoder()
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{
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return new XPngBitmapEncoder();
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}
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/// <summary>
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/// Gets or sets the bitmap source to be encoded.
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/// </summary>
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public XBitmapSource Source
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{
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get { return _source; }
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set { _source = value; }
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}
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XBitmapSource _source;
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/// <summary>
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/// When overridden in a derived class saves the image on the specified stream
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/// in the respective format.
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/// </summary>
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public abstract void Save(Stream stream);
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}
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internal sealed class XPngBitmapEncoder : XBitmapEncoder
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{
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internal XPngBitmapEncoder()
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{ }
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/// <summary>
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/// Saves the image on the specified stream in PNG format.
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/// </summary>
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public override void Save(Stream stream)
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{
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if (Source == null)
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throw new InvalidOperationException("No image source.");
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#if CORE_WITH_GDI || GDI
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if (Source.AssociatedGraphics != null)
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{
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Source.DisassociateWithGraphics();
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Debug.Assert(Source.AssociatedGraphics == null);
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}
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try
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{
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Lock.EnterGdiPlus();
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Source._gdiImage.Save(stream, ImageFormat.Png);
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}
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finally { Lock.ExitGdiPlus(); }
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#endif
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#if WPF
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DiagnosticsHelper.ThrowNotImplementedException("Save...");
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#endif
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}
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}
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}
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