setUseEs
Requests that GDK create an OpenGL ES context instead of an OpenGL one.
Not all platforms support OpenGL ES.
The @context must not have been realized.
By default, GDK will attempt to automatically detect whether the underlying GL implementation is OpenGL or OpenGL ES once the @context is realized.
You should check the return value of method@Gdk.GLContext.get_use_es after calling method@Gdk.GLContext.realize to decide whether to use the OpenGL or OpenGL ES API, extensions, or shaders.
Parameters
useEs
whether the context should use OpenGL ES instead of OpenGL, or -1 to allow auto-detection