Creates a new `GdkGLContext` for the `GdkSurface`.
The context is disconnected from any particular surface or surface. If the creation of the `GdkGLContext` failed, throws will be set. Before using the returned `GdkGLContext`, you will need to call [ [email protected]_current] or [[email protected]].
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a `GdkSurface` |
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the newly created `GdkGLContext` |