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[Mac] Fixed joystick Guid calculation

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The result now matches the output of SDL2 as well as the entries in the
GamePad configuration database.
This commit is contained in:
thefiddler 2014-09-11 13:18:29 +02:00
parent 41f1f92cdf
commit d4c6b2e699
1 changed files with 12 additions and 1 deletions
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13
Source/OpenTK/Platform/MacOS/HIDInput.cs
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@ -558,7 +558,18 @@ namespace OpenTK.Platform.MacOS
guid_bytes.AddRange(name_bytes);
}
return new Guid(guid_bytes.ToArray());
// The Guid(byte[]) constructor performs byte-swapping on the first 4+2+2 bytes, while
// the Guid(string) constructor does not. Since our database is using the string
// constructor, we need to compensate for this difference or the database lookups
// will fail.
byte[] guid_array = guid_bytes.ToArray();
if (BitConverter.IsLittleEndian)
{
Array.Reverse(guid_array, 0, 4);
Array.Reverse(guid_array, 4, 2);
Array.Reverse(guid_array, 6, 2);
}
return new Guid(guid_array);
}
JoystickData CreateJoystick(IntPtr sender, IntPtr device)