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Added Wgl.EXT.SupportsExtension and optimized Wgl.ARB.SupportsExtension function. Fixed a bug in Wgl.Load() function, where wglGetProcAddress was never called.

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This commit is contained in:
the_fiddler 2007-09-29 15:26:39 +00:00
parent 34d3a715a5
commit f86e6583e3
1 changed files with 74 additions and 9 deletions
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79
Source/OpenTK/Platform/Windows/WglHelper.cs
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@ -41,6 +41,9 @@ namespace OpenTK.Platform.Windows
private static Type delegatesClass;
private static Type importsClass;
private static bool reload_ext_extension_strings = true;
private static bool reload_arb_extension_strings = true;
#endregion
#region public static Delegate GetDelegate(string name, Type signature)
@ -104,6 +107,8 @@ namespace OpenTK.Platform.Windows
#endregion
#region public static void LoadAll()
/// <summary>
/// Loads all Wgl entry points, core and extensions.
/// </summary>
@ -114,8 +119,14 @@ namespace OpenTK.Platform.Windows
{
f.SetValue(null, GetDelegate(f.Name, f.FieldType));
}
reload_ext_extension_strings = true;
reload_arb_extension_strings = true;
}
#endregion
#region public static bool Load(string function)
/// <summary>
/// Loads the given Wgl entry point.
/// </summary>
@ -127,27 +138,81 @@ namespace OpenTK.Platform.Windows
if (f == null)
return false;
f.SetValue(null, GetDelegate(f.Name, f.FieldType));
Delegate old = f.GetValue(null) as Delegate;
Delegate @new = GetDelegate(f.Name, f.FieldType);
return f.GetValue(null) != null;
if (old.Target != @new.Target)
{
f.SetValue(null, @new);
if (function.EndsWith("EXT"))
reload_ext_extension_strings = true;
else if (function.EndsWith("ARB"))
reload_arb_extension_strings = true;
}
return @new != null;
}
#endregion
#region public static partial class ARB
public static partial class ARB
{
private static string[] extensions;
/// <summary>
/// Checks if an extension is supported by the given context.
/// Checks if an "ARB" extension is supported by the given context.
/// </summary>
/// <param name="deviceContext">The device context to check.</param>
/// <param name="deviceContext">The device context.</param>
/// <param name="ext">The extension to check.</param>
/// <returns>True if the extension is supported by the given context, false otherwise</returns>
public static bool SupportsExtension(IntPtr deviceContext, string ext)
{
string extension_string = Wgl.ARB.GetExtensionsString(deviceContext);
string[] extensions = extension_string.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
if (Wgl.Delegates.wglGetExtensionsStringARB != null)
{
if (extensions == null || reload_arb_extension_strings)
{
extensions = Wgl.ARB.GetExtensionsString(deviceContext).Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
Array.Sort(extensions);
reload_arb_extension_strings = false;
}
return Array.BinarySearch(extensions, ext) != -1;
}
return false;
}
}
#endregion
#region public static partial class EXT
public static partial class EXT
{
private static string[] extensions;
/// <summary>
/// Checks if an "EXT" extension is supported by the given context.
/// </summary>
/// <param name="deviceContext">The device context.</param>
/// <param name="ext">The extension to check.</param>
/// <returns>True if the extension is supported by the given context, false otherwise</returns>
public static bool SupportsExtension(IntPtr deviceContext, string ext)
{
if (Wgl.Delegates.wglGetExtensionsStringEXT != null)
{
if (extensions == null || reload_ext_extension_strings)
{
extensions = Wgl.ARB.GetExtensionsString(deviceContext).Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
Array.Sort(extensions);
reload_ext_extension_strings = false;
}
return Array.BinarySearch(extensions, ext) != -1;
}
return false;
}
}
#endregion
}
}