Lifecycle and Resource Ownership

Lifecycle is part of correctness because Processing/OpenGL resources belong to a graphics context and scenes/outputs can be activated, resized or disposed.

Scene lifecycle

A scene may receive services, run setup, update/render, and later receive dispose() on switch, clear, replacement or facade release. A later activation may set up again.

Graphics targets

Output-target recreation is requested through resetGraphics(int) and applied at the appropriate render/draw boundary. Renderer/target implementation remains internal, so sketches cannot retain invalidated render resources.

Ownership rule

The library owns the active draw frame of the PGraphicsOpenGL passed to sceneRender(). Scene code must not call beginDraw()/endDraw() there and should not retain the target as scene-owned state.

Shutdown

Outputs, background workers and native resources must reach deterministic shutdown before process/release completion. Backend-specific details are covered in Output Backends.