giles
1a74d811f7
All checks were successful
Build and Deploy / build-and-deploy (push) Successful in 2m33s
Merges full history from art-dag/mono.git into the monorepo under the artdag/ directory. Contains: core (DAG engine), l1 (Celery rendering server), l2 (ActivityPub registry), common (shared templates/middleware), client (CLI), test (e2e). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> git-subtree-dir: artdag git-subtree-mainline:1a179de547git-subtree-split:4c2e716558
24 lines
754 B
Common Lisp
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)))))))
|