110 lines
3.3 KiB
C#
110 lines
3.3 KiB
C#
//
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// System.Drawing.ImageConverter.cs
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//
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// Author:
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// Dennis Hayes (dennish@Raytek.com)
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// Sanjay Gupta (gsanjay@novell.com)
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//
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// (C) 2002 Ximian, Inc
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel;
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using System.Globalization;
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using System.IO;
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using System.Drawing.Imaging;
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namespace System.Drawing
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{
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/// <summary>
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/// Summary description for ImageConverter.
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/// </summary>
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public class ImageConverter : TypeConverter
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{
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public ImageConverter ()
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{
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}
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public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
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{
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if (sourceType == typeof (System.Byte []))
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return true;
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else
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return false;
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}
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public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
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{
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if ((destinationType == typeof (System.Byte [])) || (destinationType == typeof (System.String)))
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return true;
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else
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return false;
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}
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public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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byte [] bytes = value as byte [];
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if (bytes == null)
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return base.ConvertFrom (context, culture, value);
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MemoryStream ms = new MemoryStream (bytes);
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return Image.FromStream (ms);
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}
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public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
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{
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if (value == null)
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return "(none)";
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if (value is System.Drawing.Image) {
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if (destinationType == typeof (string)) {
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return value.ToString ();
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} else if (CanConvertTo (null, destinationType)) {
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//came here means destinationType is byte array ;
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using (MemoryStream ms = new MemoryStream ()) {
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((Image)value).Save (ms, ((Image)value).RawFormat);
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return ms.ToArray ();
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}
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}
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}
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string msg = Locale.GetText ("ImageConverter can not convert from type '{0}'.", value.GetType ());
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throw new NotSupportedException (msg);
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}
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public override PropertyDescriptorCollection GetProperties (ITypeDescriptorContext context, object value, Attribute[] attributes)
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{
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return TypeDescriptor.GetProperties (typeof (Image), attributes);
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}
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public override bool GetPropertiesSupported (ITypeDescriptorContext context )
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{
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return true;
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}
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}
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}
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