@startuml
skinparam BackgroundColor F0F0F0
participant "Application" as app
participant "Service GUI" as gui
participant "Context Pool" as pool
participant "Rendering Worker" as worker
participant "Service E Ink" as eink

app -> gui: Draw request
gui -> eink: Prepare display
gui -> worker: Drop awaiting requests
gui -> worker: Add new request
activate worker

worker -> pool: Borrow context
worker -> worker: Render
return Finished(contextId)

@enduml