Initial move from old twain-in-dotnet.

NTwain/Triplets/DGImage/DGImage.ImageNativeXfer.cs

@@ -0,0 +1,46 @@
+// The MIT License (MIT)
+// Copyright (c) 2013 Yin-Chun Wang
+//
+// 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;
+using NTwain.Data;
+using NTwain.Values;
+
+namespace NTwain.Triplets
+{
+	sealed class ImageNativeXfer : OpBase
+	{
+		internal ImageNativeXfer(TwainSession session) : base(session) { }
+
+		/// <summary>
+		/// Causes the transfer of an image’s data from the Source to the application, via the Native transfer
+		/// mechanism, to begin. The resulting data is stored in main memory in a single block. The data is
+		/// stored in Picture (PICT) format on the Macintosh and as a device-independent bitmap (DIB)
+		/// under Microsoft Windows. The size of the image that can be transferred is limited to the size of
+		/// the memory block that can be allocated by the Source.
+		/// </summary>
+		/// <param name="handle">The handle.</param>
+		/// <returns></returns>
+		public ReturnCode Get(ref IntPtr handle)
+		{
+			Session.VerifyState(6, 6, DataGroups.Image, DataArgumentType.ImageNativeXfer, Message.Get);
+			return PInvoke.DsmEntry(Session.AppId, Session.SourceId, DataGroups.Image, DataArgumentType.ImageNativeXfer, Message.Get, ref handle);
+		}
+	}
+}