private static void DebugCallbackThunk(UInt32 source, UInt32 type, UInt32 id, UInt32 severity, Int32 length, IntPtr message, IntPtr userParam)
{
var messageString = Marshal.PtrToStringAnsi(message, length);
var messageLevel = DebugLevels.Info;
switch (severity)
{
case gl.DEBUG_SEVERITY_MEDIUM:
messageLevel = DebugLevels.Warning;
break;
case gl.DEBUG_SEVERITY_HIGH:
messageLevel = DebugLevels.Error;
break;
}
var uv = UltravioletContext.RequestCurrent();
if (uv == null)
{
return;
}
var gfx = uv.GetGraphics() as OpenGLUltravioletGraphics;
if (gfx == null)
{
return;
}
gfx.debugCallback?.Invoke(uv, messageLevel, messageString);
}
protected UltravioletContext Foo(Func <UltravioletContext> uv)
{
try
{
return(uv());
}
catch
{
var current = UltravioletContext.RequestCurrent();
if (current != null)
{
current.Dispose();
}
throw;
}
}
/// <summary>
/// Initializes the singleton resource.
/// </summary>
private void InitializeResource()
{
var uv = UltravioletContext.RequestCurrent();
if (uv == null)
{
return;
}
if (resource == null || resource.Ultraviolet != uv)
{
if (ShouldInitializeResource(uv))
{
resource = initializer(uv);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="UltravioletSingleton{T}"/> class.
/// </summary>
/// <param name="flags">A set of flags which modify the singleton's behavior.</param>
/// <param name="initializer">A function which initializes a new instance of the bound resource.</param>
public UltravioletSingleton(UltravioletSingletonFlags flags, Func <UltravioletContext, T> initializer)
{
Contract.Require(initializer, nameof(initializer));
this.flags = flags;
this.initializer = initializer;
var uv = UltravioletContext.RequestCurrent();
if (uv != null && uv.IsInitialized && ShouldInitializeResource(uv))
{
resource = initializer(uv);
}
UltravioletContext.ContextInitialized += UltravioletContext_ContextInitialized;
UltravioletContext.ContextInvalidated += UltravioletContext_ContextInvalidated;
}
