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Initial support for external contexts.

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This commit is contained in:
the_fiddler 2008-05-19 20:54:44 +00:00
parent b48202324b
commit 548d4b2aef
1 changed files with 41 additions and 12 deletions
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53
Source/OpenTK/Graphics/GraphicsContext.cs
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@ -23,6 +23,10 @@ namespace OpenTK.Graphics
IGraphicsContext implementation; // The actual render context implementation for the underlying platform.
List<IDisposable> dispose_queue = new List<IDisposable>();
bool disposed;
// Indicates that this context was created through external means, e.g. Tao.Sdl or GLWidget#.
// In this case, We'll assume that the external program will manage the lifetime of this
// context - we'll not destroy it manually.
bool is_external;
static bool share_contexts = true;
static bool direct_rendering = true;
@ -30,17 +34,6 @@ namespace OpenTK.Graphics
// Maps OS-specific context handles to GraphicsContext weak references.
static Dictionary<ContextHandle, WeakReference> available_contexts = new Dictionary<ContextHandle, WeakReference>();
#region public GraphicsContext(DisplayMode mode, IWindowInfo window)
/// <summary>This method is obsolete.</summary>
/// <param name="mode"></param>
/// <param name="window"></param>
public GraphicsContext(DisplayMode mode, IWindowInfo window)
: this(mode.ToGraphicsMode(), window)
{ }
#endregion
#region public GraphicsContext(GraphicsMode format, IWindowInfo window)
/// <summary>
@ -100,6 +93,42 @@ namespace OpenTK.Graphics
#endregion
private GraphicsContext()
{
}
/// <summary>
/// Attempts to create a GraphicsContext object from an existing OpenGL context.
/// </summary>
/// <param name="window">The window this context is bound to.</param>
/// <returns>A new GraphicsContext object, describing the current OpenGL context.</returns>
/// <remarks>
/// <para>Use this function to interoperate with OpenGL contexts created outside of OpenTK.</para>
/// <para>The new GraphicsContext is added to the list of available OpenTK contexts.
/// Make sure to call the Dispose() method once this context is destroyed.</para>
/// <para>You may not call this method more than once on the same context. Doing so will throw an exception.</para>
/// </remarks>
public static GraphicsContext CreateFromCurrentContext(IWindowInfo window)
{
Debug.Print("Creating context from current thread.");
GraphicsContext context = new GraphicsContext();
context.is_external = true;
if (Configuration.RunningOnWindows)
context.implementation = new OpenTK.Platform.Windows.WinGLContext(window);
else if (Configuration.RunningOnX11)
context.implementation = new OpenTK.Platform.X11.X11GLContext(window);
else
throw new PlatformNotSupportedException("Please, refer to http://www.opentk.com for more information.");
lock (context_lock)
{
available_contexts.Add((context as IGraphicsContextInternal).Context, new WeakReference(context));
}
return context;
}
#region void ContextDestroyed(IGraphicsContext context, EventArgs e)
/// <summary>
@ -377,7 +406,7 @@ namespace OpenTK.Graphics
available_contexts.Remove((this as IGraphicsContextInternal).Context);
}
if (manual)
if (manual && !is_external)
{
if (implementation != null)
implementation.Dispose();