Opaque context, returned by mpv_get_sub_api(MPV_SUB_API_OPENGL_CB).
A context is bound to the mpv_handle it was retrieved from. The context
will always be the same (for the same mpv_handle), and is valid until the
mpv_handle it belongs to is released.
Opaque context, returned by mpv_get_sub_api(MPV_SUB_API_OPENGL_CB).
A context is bound to the mpv_handle it was retrieved from. The context will always be the same (for the same mpv_handle), and is valid until the mpv_handle it belongs to is released.