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Implemented new loading mechanism

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Stefanos A. 2013-11-24 13:57:43 +01:00
parent 7a57c9c3d2
commit 825ed3621f
1 changed files with 21 additions and 11 deletions
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32
Source/OpenTK/Graphics/GraphicsBindingsBase.cs
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@ -35,6 +35,18 @@ namespace OpenTK.Graphics
/// </summary> /// </summary>
public abstract class GraphicsBindingsBase : BindingsBase public abstract class GraphicsBindingsBase : BindingsBase
{ {
/// <summary>
/// Contains the list of API entry points (function pointers).
/// This field must be set by an inheriting class.
/// </summary>
protected IntPtr[] EntryPointsInstance;
/// <summary>
/// Contains the list of API entry point names.
/// This field must be set by an inheriting class.
/// </summary>
protected string[] EntryPointNamesInstance;
/// <summary> /// <summary>
/// Retrieves an unmanaged function pointer to the specified function. /// Retrieves an unmanaged function pointer to the specified function.
/// </summary> /// </summary>
@ -58,22 +70,20 @@ namespace OpenTK.Graphics
return context != null ? context.GetAddress(funcname) : IntPtr.Zero; return context != null ? context.GetAddress(funcname) : IntPtr.Zero;
} }
internal static Delegate GetExtensionDelegateStatic(string funcname, Type signature) // Loads all available entry points for the current API.
// Note: we prefer IGraphicsContextInternal.GetAddress over
// this.GetAddress to improve loading performance (less
// validation necessary.)
internal override void LoadEntryPoints()
{ {
var context = GraphicsContext.CurrentContext as IGraphicsContextInternal; IGraphicsContext context = GraphicsContext.CurrentContext;
if (context == null) if (context == null)
throw new GraphicsContextMissingException(); throw new GraphicsContextMissingException();
IntPtr address = context.GetAddress(funcname); IGraphicsContextInternal context_internal = context as IGraphicsContextInternal;
if (address == IntPtr.Zero || for (int i = 0; i < EntryPointsInstance.Length; i++)
address == new IntPtr(1) || // Workaround for buggy nvidia drivers which return
address == new IntPtr(2)) // 1 or 2 instead of IntPtr.Zero for some extensions.
{ {
return null; EntryPointsInstance[i] = context_internal.GetAddress(EntryPointNamesInstance[i]);
}
else
{
return Marshal.GetDelegateForFunctionPointer(address, signature);
} }
} }
} }