#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2007 empira Software GmbH, Cologne (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;
#if Gdip
using System.Drawing;
using System.Drawing.Drawing2D;
#endif
#if Wpf
using System.Windows.Media;
#endif
using PdfSharp.Internal;

namespace PdfSharp.Drawing
{
  /// <summary>
  /// Classes derived from this abstract base class define objects used to fill the 
  /// interiors of paths.
  /// </summary>
  public abstract class XBrush
  {
#if Gdip
    internal abstract Brush RealizeGdiBrush();

#if GdipUseGdiObjects
    public static implicit operator XBrush(Brush brush)
    {
      XBrush xbrush;
      SolidBrush solidBrush;
      LinearGradientBrush lgBrush;
      if ((solidBrush = brush as SolidBrush) != null)
      {
        xbrush = new XSolidBrush(solidBrush.Color);
      }
      else if ((lgBrush = brush as LinearGradientBrush) != null)
      {
        // TODO: xbrush = new LinearGradientBrush(lgBrush.Rectangle, lgBrush.co(solidBrush.Color);
        throw new NotImplementedException("Brush type not yet supported by PDFsharp.");
      }
      else
      {
        throw new NotImplementedException("Brush type not supported by PDFsharp.");
      }
      return xbrush;
    }
#endif
#endif
#if Wpf
    internal abstract Brush RealizeWpfBrush();
#endif
  }
}
