ImageCodecInfo.cs :  » 2.6.4-mono-.net-core » System.Drawing » System » Drawing » Imaging » C# / CSharp Open Source

//
// System.Drawing.Imaging.ImageCodecInfo.cs
//
// Authors:
//   Everaldo Canuto (everaldo.canuto@bol.com.br)
//   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//   Dennis Hayes (dennish@raytek.com)
//   Jordi Mas i Hernandez (jordi@ximian.com)
//   Sebastien Pouliot  <sebastien@ximian.com>
//
// (C) 2002 Ximian, Inc.  http://www.ximian.com
// Copyright (C) 2004,2006,2007 Novell, Inc (http://www.novell.com)
//
// 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.
//

using System.Runtime.InteropServices;
using System.Collections;
using System.IO;

namespace System.Drawing.Imaging{

#if ONLY_1_1
  [ComVisible (false)]
#endif
  public sealed class ImageCodecInfo {
    private Guid clsid;
    private string codecName;
    private string dllName;
    private string filenameExtension;
    private ImageCodecFlags flags;
    private string formatDescription;
    private Guid formatID;
    private string  mimeType;
    private byte[][] signatureMasks;
    private byte[][] signaturePatterns;
    private int version;
    
    internal ImageCodecInfo()
    {
    }

    // methods    
    public static ImageCodecInfo[] GetImageDecoders() 
    {      
      int decoderNums, arraySize, decoder_size;
      IntPtr decoders, decoder_ptr;
      ImageCodecInfo[] result;
      GdipImageCodecInfo gdipdecoder = new GdipImageCodecInfo();
      Status status;
      
      status = GDIPlus.GdipGetImageDecodersSize (out decoderNums, out arraySize);
      GDIPlus.CheckStatus (status);
      
      result =  new ImageCodecInfo [decoderNums];      
      
      if (decoderNums == 0)
        return result;      
      
      /* Get decoders list*/
      decoders = Marshal.AllocHGlobal (arraySize);
      try {
        status = GDIPlus.GdipGetImageDecoders (decoderNums,  arraySize, decoders);
        GDIPlus.CheckStatus (status);
      
        decoder_size = Marshal.SizeOf (gdipdecoder);
        decoder_ptr = decoders;
      
        for (int i = 0; i < decoderNums; i++, decoder_ptr = new IntPtr (decoder_ptr.ToInt64 () + decoder_size)) {
          gdipdecoder = (GdipImageCodecInfo) Marshal.PtrToStructure (decoder_ptr, typeof (GdipImageCodecInfo));
          result[i] = new ImageCodecInfo ();
          GdipImageCodecInfo.MarshalTo (gdipdecoder, result[i]);
        }
      }
      finally {
        Marshal.FreeHGlobal (decoders);
      }
      return result;
    }
    
    
    public static ImageCodecInfo[] GetImageEncoders() 
    {
      int encoderNums, arraySize, encoder_size;
      IntPtr encoders, encoder_ptr;
      ImageCodecInfo[] result;
      GdipImageCodecInfo gdipencoder = new GdipImageCodecInfo();
      Status status;
      
      status = GDIPlus.GdipGetImageEncodersSize (out encoderNums, out arraySize);
      GDIPlus.CheckStatus (status);
      
      result =  new ImageCodecInfo [encoderNums];      
      
      if (encoderNums == 0)
        return result;      
      
      /* Get encoders list*/
      encoders = Marshal.AllocHGlobal (arraySize);
      try {
        status = GDIPlus.GdipGetImageEncoders (encoderNums,  arraySize, encoders);
        GDIPlus.CheckStatus (status);
      
        encoder_size = Marshal.SizeOf (gdipencoder);
        encoder_ptr = encoders;
      
        for (int i = 0; i < encoderNums; i++, encoder_ptr = new IntPtr (encoder_ptr.ToInt64 () + encoder_size)) {
          gdipencoder = (GdipImageCodecInfo) Marshal.PtrToStructure (encoder_ptr, typeof (GdipImageCodecInfo));
          result[i] = new ImageCodecInfo ();
          GdipImageCodecInfo.MarshalTo (gdipencoder, result[i]);
        }
      }
      finally {
        Marshal.FreeHGlobal (encoders);
      }
      return result;
    }

    // properties
    
    public Guid Clsid 
    {
      get { return clsid; }
      set { clsid = value; }
    }

    
    public string CodecName 
    {
      get { return codecName; }
      set { codecName = value; }
    }

    
    public string DllName 
    {
      get { return dllName; }
      set { dllName = value; }
    }

    
    public string FilenameExtension 
    {
      get { return filenameExtension; }
      set { filenameExtension = value; }
    }

    
    public ImageCodecFlags Flags 
    {
      get { return flags; }
      set { flags = value; }
    }
    
    public string FormatDescription 
    {
      get { return formatDescription; }
      set { formatDescription = value; }
    }
    
    public Guid FormatID 
    {
      get { return formatID; }
      set { formatID = value; }
    }

    
    public string MimeType 
    {
      get { return mimeType; }
      set { mimeType = value; }
    }

    
    [CLSCompliant(false)]
    public byte[][] SignatureMasks 
    {
      get { return signatureMasks; }
      set { signatureMasks = value; }
    }

    [CLSCompliant(false)]
    public byte[][] SignaturePatterns 
    {
      get { return signaturePatterns; }
      set { signaturePatterns = value; }
    }
    
    public int Version 
    {
      get { return version; }
      set { version = value; }
    }
  }
}