Files
celery/sexp_effects/effects/vignette.sexp
giles bb458aa924 Replace batch DAG system with streaming architecture
- Remove legacy_tasks.py, hybrid_state.py, render.py
- Remove old task modules (analyze, execute, execute_sexp, orchestrate)
- Add streaming interpreter from test repo
- Add sexp_effects with primitives and video effects
- Add streaming Celery task with CID-based asset resolution
- Support both CID and friendly name references for assets
- Add .dockerignore to prevent local clones from conflicting

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-02-02 19:10:11 +00:00

24 lines
754 B
Common Lisp

;; Vignette effect - darkens corners
(require-primitives "image")
(define-effect vignette
:params (
(strength :type float :default 0.5 :range [0 1])
(radius :type int :default 1 :range [0.5 2])
)
(let* ((w (image:width frame))
(h (image:height frame))
(cx (/ w 2))
(cy (/ h 2))
(max-dist (* (sqrt (+ (* cx cx) (* cy cy))) radius)))
(map-pixels frame
(lambda (x y c)
(let* ((dx (- x cx))
(dy (- y cy))
(dist (sqrt (+ (* dx dx) (* dy dy))))
(factor (- 1 (* (/ dist max-dist) strength)))
(factor (clamp factor 0 1)))
(rgb (* (red c) factor)
(* (green c) factor)
(* (blue c) factor)))))))