17 lines
560 B
Common Lisp
17 lines
560 B
Common Lisp
;; Bloom effect - glow on bright areas
|
|
(require-primitives "image" "blending")
|
|
|
|
(define-effect bloom
|
|
:params (
|
|
(intensity :type float :default 0.5 :range [0 2])
|
|
(threshold :type int :default 200 :range [0 255])
|
|
(radius :type int :default 15 :range [1 50])
|
|
)
|
|
(let* ((bright (map-pixels frame
|
|
(lambda (x y c)
|
|
(if (> (luminance c) threshold)
|
|
c
|
|
(rgb 0 0 0)))))
|
|
(blurred (image:blur bright radius)))
|
|
(blending:blend-mode frame blurred "add")))
|