Squashed 'Source/OpenTK/Platform/SDL2/sdl2-cs/' content from commit b434bac

git-subtree-dir: Source/OpenTK/Platform/SDL2/sdl2-cs
git-subtree-split: b434bacba859a036b11ec3ac76c3baa058764769

.gitignore

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+bin/
+obj/
+*.userprefs

LICENSE

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+/* SDL2# - C# Wrapper for SDL2
+ *
+ * Copyright (c) 2013 Ethan Lee.
+ *
+ * This software is provided 'as-is', without any express or implied warranty.
+ * In no event will the authors be held liable for any damages arising from
+ * the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software in a
+ * product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * Ethan "flibitijibibo" Lee <flibitijibibo@flibitijibibo.com>
+ *
+ */

README

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+This is SDL2#, a C# wrapper for SDL2.
+
+Project Website: https://github.com/flibitijibibo/SDL2-CS
+
+License
+-------
+SDL2 and SDL2# are released under the zlib license. See LICENSE for details.
+
+SDL2# currently uses parts of OpenTK, which is released under the MIT license.
+See opentk.LICENSE for details.
+
+About SDL2
+----------
+For more information about SDL2, visit the SDL wiki:
+
+http://wiki.libsdl.org/moin.fcg/FrontPage
+
+About the C# Wrapper
+--------------------
+The C# wrapper was written to be used for MonoGame's desktop platforms. However,
+this is written in a way that can be used for any general C# application.
+
+The wrapper provides bindings for the following libraries:
+- SDL2
+- SDL2_image
+- SDL2_mixer
+- SDL2_ttf
+
+We also provide bindings for OpenGL and OpenAL, taken from OpenTK.
+
+Note that SDL2# will not provide every single SDL2 function. This is due to
+limitations in the C# language that would cause major conflicts with the native
+SDL2 library and its extensions.
+
+SDL2# is a pure port of the C headers. The naming schemes for this library will
+be exactly as they are done in the C library, with little-to-no concern for
+"appropriate" C# style. The namespace indicates that this is SDL2, the class
+names will indicate which library file the function/type/value exists in, and
+everything else will be as close to the C version as technically possible.
+
+Roadmap
+-------
+To see the current roadmap for SDL2#, visit the GitHub issues page:
+
+https://github.com/flibitijibibo/SDL2-CS/issues

src/LPUtf8StrMarshaler.cs

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+/* SDL2# - C# Wrapper for SDL2
+ *
+ * Copyright (c) 2013 Ethan Lee.
+ *
+ * This software is provided 'as-is', without any express or implied warranty.
+ * In no event will the authors be held liable for any damages arising from
+ * the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software in a
+ * product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * Ethan "flibitijibibo" Lee <flibitijibibo@flibitijibibo.com>
+ *
+ */
+
+using System;
+using System.Text;
+using System.Runtime.InteropServices;
+
+namespace SDL2
+{
+	internal unsafe class LPUtf8StrMarshaler : ICustomMarshaler
+	{
+		public const string LeaveAllocated = "LeaveAllocated";
+
+		private static ICustomMarshaler
+			_leaveAllocatedInstance = new LPUtf8StrMarshaler(true),
+			_defaultInstance = new LPUtf8StrMarshaler(false);
+
+		public static ICustomMarshaler GetInstance(string cookie)
+		{
+			switch (cookie)
+			{
+			case "LeaveAllocated":
+				return _leaveAllocatedInstance;
+			default:
+				return _defaultInstance;
+			}
+		}
+
+		private bool _leaveAllocated;
+
+		public LPUtf8StrMarshaler(bool leaveAllocated)
+		{
+			_leaveAllocated = leaveAllocated;
+		}
+
+		public object MarshalNativeToManaged(IntPtr pNativeData)
+		{
+			if (pNativeData == IntPtr.Zero)
+				return null;
+			var ptr = (byte*)pNativeData;
+			while (*ptr != 0)
+			{
+				ptr++;
+			}
+			var bytes = new byte[ptr - (byte*)pNativeData];
+			Marshal.Copy(pNativeData, bytes, 0, bytes.Length);
+			return Encoding.UTF8.GetString(bytes);
+		}
+
+		public IntPtr MarshalManagedToNative(object ManagedObj)
+		{
+			if (ManagedObj == null)
+				return IntPtr.Zero;
+			var str = ManagedObj as string;
+			if (str == null)
+			{
+				throw new ArgumentException("ManagedObj must be a string.", "ManagedObj");
+			}
+			var bytes = Encoding.UTF8.GetBytes(str);
+			var mem = Marshal.AllocHGlobal(bytes.Length + 1);
+			Marshal.Copy(bytes, 0, mem, bytes.Length);
+			((byte*)mem)[bytes.Length] = 0;
+			return mem;
+		}
+
+		public void CleanUpManagedData(object ManagedObj)
+		{
+		}
+
+		public void CleanUpNativeData(IntPtr pNativeData)
+		{
+			if (!_leaveAllocated)
+			{
+				Marshal.FreeHGlobal(pNativeData);
+			}
+		}
+
+		public int GetNativeDataSize ()
+		{
+			return -1;
+		}
+	}
+}