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52 lines
2 KiB
C#
52 lines
2 KiB
C#
#region License
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//
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// The Open Toolkit Library License
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//
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// Copyright (c) 2006 - 2009 the Open Toolkit library.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#endregion
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using System;
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using System.Runtime.InteropServices;
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namespace OpenTK {
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/// <summary>
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/// Provides a common foundation for all flat API bindings and implements the extension loading interface.
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/// </summary>
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public abstract class BindingsBase {
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protected abstract IntPtr GetAddress(string funcname);
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public static bool IsInvalidAddress(IntPtr address) {
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return address == IntPtr.Zero || address == new IntPtr(1) ||
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address == new IntPtr(2) || address == new IntPtr(-1);
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}
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// Creates a System.Delegate that can be used to call a dynamically exported OpenGL function.
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protected internal void LoadDelegate<T>(string name, out T del) where T : class {
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IntPtr address = GetAddress(name);
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del = IsInvalidAddress(address) ? null :
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(T)(object)Marshal.GetDelegateForFunctionPointer(address, typeof(T));
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}
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}
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}
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