4a2a223751
Added OpenGL 3.0 support for GLX contexts. Added support for creating dummy contexts (useful if you are creating contexts from an external library). Cleaned up unused and stale code.
87 lines
3 KiB
C#
87 lines
3 KiB
C#
#region --- License ---
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/* Copyright (c) 2006, 2007 Stefanos Apostolopoulos
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* See license.txt for license info
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Reflection;
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using System.Runtime.InteropServices;
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using System.Diagnostics;
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using OpenTK.Graphics;
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namespace OpenTK.Platform.X11
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{
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static partial class Glx
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{
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const string Library = "libGL.so.1";
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// Disable BeforeFieldInit optimization.
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static Glx() { }
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#region static Delegate LoadDelegate(string name, Type signature)
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/// <summary>
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/// Creates a System.Delegate that can be used to call an OpenGL function, core or extension.
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/// </summary>
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/// <param name="name">The name of the Wgl function (eg. "wglNewList")</param>
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/// <param name="signature">The signature of the OpenGL function.</param>
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/// <returns>
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/// A System.Delegate that can be used to call this OpenGL function, or null if the specified
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/// function name did not correspond to an OpenGL function.
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/// </returns>
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static Delegate LoadDelegate(string name, Type signature)
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{
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Delegate d;
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string realName = name.ToLower().StartsWith("glx") ? name.Substring(3) : name;
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if (typeof(Glx).GetMethod(realName,
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BindingFlags.NonPublic | BindingFlags.Static) != null)
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d = GetExtensionDelegate(name, signature) ??
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Delegate.CreateDelegate(signature, typeof(Glx), realName);
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else
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d = GetExtensionDelegate(name, signature);
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return d;
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}
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#endregion
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#region private static Delegate GetExtensionDelegate(string name, Type signature)
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/// <summary>
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/// Creates a System.Delegate that can be used to call a dynamically exported OpenGL function.
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/// </summary>
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/// <param name="name">The name of the OpenGL function (eg. "glNewList")</param>
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/// <param name="signature">The signature of the OpenGL function.</param>
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/// <returns>
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/// A System.Delegate that can be used to call this OpenGL function or null
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/// if the function is not available in the current OpenGL context.
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/// </returns>
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private static Delegate GetExtensionDelegate(string name, Type signature)
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{
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IntPtr address = Glx.GetProcAddress(name);
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if (address == IntPtr.Zero ||
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address == new IntPtr(1) || // Workaround for buggy nvidia drivers which return
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address == new IntPtr(2)) // 1 or 2 instead of IntPtr.Zero for some extensions.
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return null;
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else
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return Marshal.GetDelegateForFunctionPointer(address, signature);
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}
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#endregion
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#region internal static void LoadAll
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public static void LoadAll()
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{
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OpenTK.Platform.Utilities.LoadExtensions(typeof(Glx));
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}
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#endregion
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}
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}
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