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Added API for OpenGL context resource sharing (GLContext.ShareContexts)

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This commit is contained in:
the_fiddler 2008-01-22 14:53:44 +00:00
parent bd26796ced
commit 800b6483e7
1 changed files with 30 additions and 2 deletions
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30
Source/OpenTK/GLContext.cs
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@ -19,15 +19,17 @@ namespace OpenTK
{
IGLContext implementation; // The actual render context implementation for the underlying platform.
List<IDisposable> dispose_queue = new List<IDisposable>();
bool disposed;
static bool share_contexts = true;
static object context_lock = new object();
static Dictionary<ContextHandle, WeakReference> available_contexts =
new Dictionary<ContextHandle, WeakReference>(); // Contains all available OpenGL contexts.
//delegate IntPtr GetCurrentContextDelegate();
//static GetCurrentContextDelegate StaticGetCurrentContext;
#region public GLContext(DisplayMode mode, IWindowInfo window)
/// <summary>
@ -60,6 +62,20 @@ namespace OpenTK
(this as IGLContextCreationHack).SetWindowHandle(window.Handle);
(this as IGLContextCreationHack).SelectDisplayMode(mode, window);
if (GLContext.ShareContexts)
{
lock (context_lock)
{
// A small hack to create a shared context with the first available context.
foreach (WeakReference r in GLContext.available_contexts.Values)
{
this.CreateContext(true, (GLContext)r.Target);
return;
}
}
}
// Only reached if a shared context was not created above, or if this is the first
// context ever constructed.
this.CreateContext(true, null);
}
@ -104,6 +120,18 @@ namespace OpenTK
#endregion
#region public static bool ShareContexts
/// <summary>Gets or sets a System.Boolean, indicating whether GLContexts are shared</summary>
/// <remarks>
/// <para>If ShareContexts is true, new GLContexts will share resources. If this value is
/// false, new GLContexts will not share resources.</para>
/// <para>Changing this value will not affect already created GLContexts.</para>
/// </remarks>
public static bool ShareContexts { get { return share_contexts; } set { share_contexts = value; } }
#endregion
#endregion
#region --- IGLContext Members ---