Added "special" DIB clipboard reader code, which is a test to fix bug #3576125. This is enabled over the ini property EnableSpecialDIBClipboardReader, disabled by default.

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2195 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

GreenshotPlugin/Core/BinaryStructHelper.cs

@@ -0,0 +1,72 @@
+/*
+ * Greenshot - a free and open source screenshot tool
+ * Copyright (C) 2007-2012  Thomas Braun, Jens Klingen, Robin Krom
+ * 
+ * For more information see: http://getgreenshot.org/
+ * The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 1 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+using System;
+using System.Runtime.InteropServices;
+
+namespace GreenshotPlugin.Core {
+	/// <summary>
+	/// A helper class which does the mashalling for structs
+	/// </summary>
+	public static class BinaryStructHelper {
+		/// <summary>
+		/// Get a struct from a byte array
+		/// </summary>
+		/// <typeparam name="T">typeof struct</typeparam>
+		/// <param name="bytes">byte[]</param>
+		/// <returns>struct</returns>
+		public static T FromByteArray<T>(byte[] bytes) where T : struct {
+			IntPtr ptr = IntPtr.Zero;
+			try {
+				int size = Marshal.SizeOf(typeof(T));
+				ptr = Marshal.AllocHGlobal(size);
+				Marshal.Copy(bytes, 0, ptr, size);
+				object obj = Marshal.PtrToStructure(ptr, typeof(T));
+				return (T)obj;
+			} finally {
+				if (ptr != IntPtr.Zero) {
+					Marshal.FreeHGlobal(ptr);
+				}
+			}
+		}
+
+		/// <summary>
+		/// copy a struct to a byte array
+		/// </summary>
+		/// <typeparam name="T">typeof struct</typeparam>
+		/// <param name="obj">struct</param>
+		/// <returns>byte[]</returns>
+		public static byte[] ToByteArray<T>(T obj) where T : struct {
+			IntPtr ptr = IntPtr.Zero;
+			try {
+				int size = Marshal.SizeOf(typeof(T));
+				ptr = Marshal.AllocHGlobal(size);
+				Marshal.StructureToPtr(obj, ptr, true);
+				byte[] bytes = new byte[size];
+				Marshal.Copy(ptr, bytes, 0, size);
+				return bytes;
+			} finally {
+				if (ptr != IntPtr.Zero) {
+					Marshal.FreeHGlobal(ptr);
+				}
+			}
+		}
+	}
+}