mono/mcs/class/System.Drawing/System.Drawing.Imaging/ImageCodecInfo.cs

//
// System.Drawing.Imaging.ImageCodecInfo.cs
//
// Authors:
//   Everaldo Canuto ([email protected])
//   Andreas Nahr ([email protected])
//   Dennis Hayes ([email protected])
//   Jordi Mas i Hernandez ([email protected])
//   Sebastien Pouliot  <[email protected]>
//
// (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 {

	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; }
		}
	}
}