Provide alternative for fetching sprite data

[KaiVolland]

Feature Request

Is your feature request related to a problem? Please describe.
With #308 it is possible to fetch sprite informations from a (remote) URI. There may be environements where fetching is not possible or wanted.

Describe the solution you'd like
@simonseyock suggested to provide an alternative to get the need informations without using fetch or any requests.

Describe alternatives you've considered

• add the possibility to pass an instance of a fetch method to handle the stuff yourself
• add the data directly via constructor