alysbrooks-public » games » isometric-park-fna

Location: alysbrooks-public/games/isometric-park-fna/FNA/src/Utilities/FNAInternalExtensions.cs

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Commit Description:
Don't allow towers to overlap other towers, water, or trees.
Commit Description:
Don't allow towers to overlap other towers, water, or trees.
References:
r631:5bc0c18d4ff5 m6-tiles-and-trees
File last commit:
r0:e33f209de7e5 default
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FNA/src/Utilities/FNAInternalExtensions.cs
65 lines | 1.8 KiB | text/x-csharp | CSharpLexer
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#region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
* Copyright 2009-2020 Ethan Lee and the MonoGame Team
*
* Released under the Microsoft Public License.
* See LICENSE for details.
*/
#endregion
#region Using Statements
using System;
using System.IO;
using System.Reflection;
#endregion
namespace Microsoft.Xna.Framework
{
internal static class FNAInternalExtensions
{
#region MemoryStream.TryGetBuffer Extension
private static readonly FieldInfo f_MemoryStream_Public =
// .NET
typeof(MemoryStream).GetField("_exposable", BindingFlags.NonPublic | BindingFlags.Instance) ??
// Old Mono
typeof(MemoryStream).GetField("allowGetBuffer", BindingFlags.NonPublic | BindingFlags.Instance);
/// <summary>
/// Returns the array of unsigned bytes from which this stream was created.
/// The return value indicates whether the conversion succeeded.
/// This is similar to .NET 4.6's TryGetBuffer.
/// </summary>
/// <param name="stream">The stream to get the buffer from.</param>
/// <param name="buffer">The byte array from which this stream was created.</param>
/// <returns><b>true</b> if the conversion was successful; otherwise, <b>false</b>.</returns>
internal static bool TryGetBuffer(this MemoryStream stream, out byte[] buffer)
{
// Check if the buffer is public by reflecting into a known internal field.
if (f_MemoryStream_Public != null)
{
if ((bool) f_MemoryStream_Public.GetValue(stream))
{
buffer = stream.GetBuffer();
return true;
}
buffer = null;
return false;
}
// If no known field can be found, use a horribly slow try-catch instead.
try
{
buffer = stream.GetBuffer();
return true;
}
catch (UnauthorizedAccessException)
{
buffer = null;
return false;
}
}
#endregion
}
}