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giles
2026-02-24 23:10:04 +00:00
parent 1862fe96fc c590f2e039
commit 5173167f3e
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19
test/sexp_effects/effects/film_grain.sexp Normal file
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;; Film Grain effect - adds film grain texture
(require-primitives "core")
(define-effect film_grain
:params (
(intensity :type float :default 0.2 :range [0 1])
(colored :type bool :default false)
)
(let ((grain-amount (* intensity 50)))
(map-pixels frame
(lambda (x y c)
(if colored
(rgb (clamp (+ (red c) (gaussian 0 grain-amount)) 0 255)
(clamp (+ (green c) (gaussian 0 grain-amount)) 0 255)
(clamp (+ (blue c) (gaussian 0 grain-amount)) 0 255))
(let ((n (gaussian 0 grain-amount)))
(rgb (clamp (+ (red c) n) 0 255)
(clamp (+ (green c) n) 0 255)
(clamp (+ (blue c) n) 0 255))))))))