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|
; CHROME-IT
; State of the art chrome effect for user-specified mask
; This script requires a grayscale image containing a single layer.
; This layer is used as the mask for the SOTA chrome effect
(define (script-fu-sota-chrome-it mask-img mask-drawable chrome-saturation
chrome-lightness chrome-factor env-map hc cc carve-white)
(define (set-pt a index x y)
(begin
(aset a (* index 2) x)
(aset a (+ (* index 2) 1) y)
)
)
(define (spline-chrome-it)
(let* ((a (cons-array 18 'double)))
(set-pt a 0 0.0 0.0)
(set-pt a 1 0.125 0.9216)
(set-pt a 2 0.25 0.0902)
(set-pt a 3 0.375 0.9020)
(set-pt a 4 0.5 0.0989)
(set-pt a 5 0.625 0.9549)
(set-pt a 6 0.75 00784)
(set-pt a 7 0.875 0.9412)
(set-pt a 8 1.0 0.1216)
a
)
)
(define (shadows val)
(/ (* 0.96 val) 2.55)
)
(define (midtones val)
(/ val 2.55)
)
(define (highlights val)
; The result is used as "gimp-drawable-color-balance" color parameter
; and thus must be restricted to -100.0 <= highlights <= 100.0.
(min (/ (* 1.108 val) 2.55) 100.0)
)
(define (rval col)
(car col)
)
(define (gval col)
(cadr col)
)
(define (bval col)
(caddr col)
)
(define (sota-scale val scale chrome-factor)
(* (sqrt val) (* scale chrome-factor))
)
(define (copy-layer-chrome-it dest-image dest-drawable source-image source-drawable)
(gimp-selection-all dest-image)
(gimp-drawable-edit-clear dest-drawable)
(gimp-selection-none dest-image)
(gimp-selection-all source-image)
(gimp-edit-copy source-drawable)
(let (
(floating-sel (car (gimp-edit-paste dest-drawable FALSE)))
)
(gimp-floating-sel-anchor floating-sel)
)
)
(let* (
(banding-img (car (gimp-file-load RUN-NONINTERACTIVE env-map env-map)))
(banding-layer (car (gimp-image-get-active-drawable banding-img)))
(banding-height (car (gimp-drawable-height banding-layer)))
(banding-width (car (gimp-drawable-width banding-layer)))
(banding-type (car (gimp-drawable-type banding-layer)))
(width (car (gimp-drawable-width mask-drawable)))
(height (car (gimp-drawable-height mask-drawable)))
(img (car (gimp-image-new width height GRAY)))
(size (min width height))
(offx1 (sota-scale size 0.33 chrome-factor))
(offy1 (sota-scale size 0.25 chrome-factor))
(offx2 (sota-scale size (- 0.33) chrome-factor))
(offy2 (sota-scale size (- 0.25) chrome-factor))
(feather (sota-scale size 0.5 chrome-factor))
(brush-size (sota-scale size 0.5 chrome-factor))
(brush-name (car (gimp-brush-new "Chrome It")))
(mask (car (gimp-channel-new img width height "Chrome Stencil" 50 '(0 0 0))))
(bg-layer (car (gimp-layer-new img width height GRAY-IMAGE _"Background" 100 LAYER-MODE-NORMAL)))
(layer1 (car (gimp-layer-new img banding-width banding-height banding-type _"Layer 1" 100 LAYER-MODE-NORMAL)))
(layer2 (car (gimp-layer-new img width height GRAYA-IMAGE _"Layer 2" 100 LAYER-MODE-DIFFERENCE)))
(layer3 (car (gimp-layer-new img width height GRAYA-IMAGE _"Layer 3" 100 LAYER-MODE-NORMAL)))
(shadow (car (gimp-layer-new img width height GRAYA-IMAGE _"Drop Shadow" 100 LAYER-MODE-NORMAL)))
(mask-fs 0)
(layer-mask 0)
)
(gimp-context-push)
(gimp-context-set-defaults)
(gimp-image-undo-disable img)
(gimp-image-insert-channel img mask -1 0)
(gimp-image-insert-layer img bg-layer 0 0)
(gimp-image-insert-layer img shadow 0 0)
(gimp-image-insert-layer img layer3 0 0)
(gimp-image-insert-layer img layer2 0 0)
(gimp-edit-copy mask-drawable)
(set! mask-fs (car (gimp-edit-paste mask FALSE)))
(gimp-floating-sel-anchor mask-fs)
(if (= carve-white FALSE)
(gimp-drawable-invert mask FALSE)
)
(gimp-context-set-background '(255 255 255))
(gimp-selection-none img)
(gimp-drawable-edit-fill layer2 FILL-BACKGROUND)
(gimp-drawable-edit-fill layer3 FILL-BACKGROUND)
(gimp-drawable-edit-clear shadow)
(gimp-item-set-visible bg-layer FALSE)
(gimp-item-set-visible shadow FALSE)
(gimp-image-select-item img CHANNEL-OP-REPLACE mask)
(gimp-context-set-background '(0 0 0))
(gimp-selection-translate img offx1 offy1)
(gimp-selection-feather img feather)
(gimp-drawable-edit-fill layer2 FILL-BACKGROUND)
(gimp-selection-translate img (* 2 offx2) (* 2 offy2))
(gimp-drawable-edit-fill layer3 FILL-BACKGROUND)
(gimp-selection-none img)
(set! layer2 (car (gimp-image-merge-visible-layers img CLIP-TO-IMAGE)))
(gimp-drawable-invert layer2 FALSE)
(gimp-image-insert-layer img layer1 0 0)
(copy-layer-chrome-it img layer1 banding-img banding-layer)
(gimp-image-delete banding-img)
(gimp-layer-scale layer1 width height FALSE)
(plug-in-gauss-iir RUN-NONINTERACTIVE img layer1 10 TRUE TRUE)
(gimp-layer-set-opacity layer1 50)
(set! layer1 (car (gimp-image-merge-visible-layers img CLIP-TO-IMAGE)))
(gimp-drawable-curves-spline layer1 HISTOGRAM-VALUE 18 (spline-chrome-it))
(set! layer-mask (car (gimp-layer-create-mask layer1 ADD-MASK-BLACK)))
(gimp-layer-add-mask layer1 layer-mask)
(gimp-image-select-item img CHANNEL-OP-REPLACE mask)
(gimp-context-set-background '(255 255 255))
(gimp-drawable-edit-fill layer-mask FILL-BACKGROUND)
(set! layer2 (car (gimp-layer-copy layer1 TRUE)))
(gimp-image-insert-layer img layer2 0 0)
(gimp-brush-set-shape brush-name BRUSH-GENERATED-CIRCLE)
(gimp-brush-set-spikes brush-name 2)
(gimp-brush-set-hardness brush-name 1.0)
(gimp-brush-set-spacing brush-name 25)
(gimp-brush-set-aspect-ratio brush-name 1)
(gimp-brush-set-angle brush-name 0)
(cond (<= brush-size 17) (gimp-brush-set-radius brush-name (\ brush-size 2))
(else gimp-brush-set-radius brush-name (\ 19 2)))
(gimp-context-set-brush brush-name)
(gimp-context-set-foreground '(255 255 255))
(gimp-drawable-edit-stroke-selection layer-mask)
(gimp-context-set-background '(0 0 0))
(gimp-selection-feather img (* feather 1.5))
(gimp-selection-translate img (* 2.5 offx1) (* 2.5 offy1))
(gimp-drawable-edit-fill shadow FILL-BACKGROUND)
(gimp-selection-all img)
(gimp-context-set-pattern "Marble #1")
(gimp-drawable-edit-fill bg-layer FILL-PATTERN)
(gimp-selection-none img)
(gimp-image-convert-rgb img)
(gimp-drawable-color-balance layer1 TRANSFER-SHADOWS TRUE
(shadows (rval hc))
(shadows (gval hc))
(shadows (bval hc)))
(gimp-drawable-color-balance layer1 TRANSFER-MIDTONES TRUE
(midtones (rval hc))
(midtones (gval hc))
(midtones (bval hc)))
(gimp-drawable-color-balance layer1 TRANSFER-HIGHLIGHTS TRUE
(highlights (rval hc))
(highlights (gval hc))
(highlights (bval hc)))
(gimp-drawable-color-balance layer2 TRANSFER-SHADOWS TRUE
(shadows (rval cc))
(shadows (gval cc))
(shadows (bval cc)))
(gimp-drawable-color-balance layer2 TRANSFER-MIDTONES TRUE
(midtones (rval cc))
(midtones (gval cc))
(midtones (bval cc)))
(gimp-drawable-color-balance layer2 TRANSFER-HIGHLIGHTS TRUE
(highlights (rval cc))
(highlights (gval cc))
(highlights (bval cc)))
(gimp-drawable-hue-saturation layer2 HUE-RANGE-ALL
0.0
chrome-lightness
chrome-saturation
0.0)
(gimp-item-set-visible shadow TRUE)
(gimp-item-set-visible bg-layer TRUE)
(gimp-item-set-name layer2 _"Chrome")
(gimp-item-set-name layer1 _"Highlight")
(gimp-image-remove-channel img mask)
(gimp-brush-delete brush-name)
(gimp-display-new img)
(gimp-image-undo-enable img)
(gimp-context-pop)
)
)
(script-fu-register "script-fu-sota-chrome-it"
_"Stencil C_hrome..."
_"Add a chrome effect to the selected region (or alpha) using a specified (grayscale) stencil"
"Spencer Kimball"
"Spencer Kimball"
"1997"
"GRAY"
SF-IMAGE "Chrome image" 0
SF-DRAWABLE "Chrome mask" 0
SF-ADJUSTMENT _"Chrome saturation" '(-80 -100 100 1 10 0 0)
SF-ADJUSTMENT _"Chrome lightness" '(-47 -100 100 1 10 0 0)
SF-ADJUSTMENT _"Chrome factor" '(0.75 0 1 0.1 0.01 2 0)
SF-FILENAME _"Environment map"
(string-append gimp-data-directory
"/scripts/images/beavis.jpg")
SF-COLOR _"Highlight balance" '(211 95 0)
SF-COLOR _"Chrome balance" "black"
SF-TOGGLE _"Chrome white areas" TRUE
)
(script-fu-menu-register "script-fu-sota-chrome-it"
"<Image>/Filters/Decor")
|
