/// <summary>
/// Makes the context current on the calling thread.
/// </summary>
/// <param name="ctx">
/// A <see cref="IntPtr"/> that specify the context to be current on the calling thread, bound to
/// thise device context. It can be IntPtr.Zero indicating that no context will be current.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful.
/// </returns>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
protected override bool MakeCurrentCore(IntPtr ctx)
{
if (ctx != IntPtr.Zero)
{
// Ensure correct API bound
if (Version >= Egl.Version_120)
{
int[] contextClientType = new int[1];
if (Egl.QueryContext(Display, ctx, Egl.CONTEXT_CLIENT_TYPE, contextClientType))
{
if (Egl.BindAPI((uint)contextClientType[0]) == false)
{
throw new InvalidOperationException("no ES API");
}
}
}
return(Egl.MakeCurrent(Display, EglSurface, EglSurface, ctx));
}
else
{
return(Egl.MakeCurrent(Display, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero));
}
}
