262 lines
8.9 KiB
Scheme
262 lines
8.9 KiB
Scheme
; CHROME-IT
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; State of the art chrome effect for user-specified mask
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; This script requires a grayscale image containing a single layer.
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; This layer is used as the mask for the SOTA chrome effect
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(define (script-fu-sota-chrome-it mask-img mask-drawable chrome-saturation
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chrome-lightness chrome-factor env-map hc cc carve-white)
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(define (set-pt a index x y)
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(begin
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(aset a (* index 2) x)
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(aset a (+ (* index 2) 1) y)
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)
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)
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(define (spline-chrome-it)
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(let* ((a (cons-array 18 'double)))
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(set-pt a 0 0.0 0.0)
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(set-pt a 1 0.125 0.9216)
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(set-pt a 2 0.25 0.0902)
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(set-pt a 3 0.375 0.9020)
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(set-pt a 4 0.5 0.0989)
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(set-pt a 5 0.625 0.9549)
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(set-pt a 6 0.75 00784)
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(set-pt a 7 0.875 0.9412)
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(set-pt a 8 1.0 0.1216)
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a
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)
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)
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(define (shadows val)
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(/ (* 0.96 val) 2.55)
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)
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(define (midtones val)
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(/ val 2.55)
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)
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(define (highlights val)
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; The result is used as "pika-drawable-color-balance" color parameter
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; and thus must be restricted to -100.0 <= highlights <= 100.0.
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(min (/ (* 1.108 val) 2.55) 100.0)
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)
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(define (rval col)
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(car col)
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)
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(define (gval col)
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(cadr col)
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)
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(define (bval col)
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(caddr col)
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)
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(define (sota-scale val scale chrome-factor)
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(* (sqrt val) (* scale chrome-factor))
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)
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(define (copy-layer-chrome-it dest-image dest-drawable source-image source-drawable)
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(pika-selection-all dest-image)
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(pika-drawable-edit-clear dest-drawable)
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(pika-selection-none dest-image)
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(pika-selection-all source-image)
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(pika-edit-copy 1 (vector source-drawable))
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(let* (
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(pasted (pika-edit-paste dest-drawable FALSE))
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(num-pasted (car pasted))
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(floating-sel (aref (cadr pasted) (- num-pasted 1)))
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)
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(pika-floating-sel-anchor floating-sel)
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)
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)
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(let* (
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(banding-img (car (pika-file-load RUN-NONINTERACTIVE env-map)))
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(banding-layer (aref (cadr (pika-image-get-selected-drawables banding-img)) 0))
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(banding-height (car (pika-drawable-get-height banding-layer)))
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(banding-width (car (pika-drawable-get-width banding-layer)))
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(banding-type (car (pika-drawable-type banding-layer)))
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(width (car (pika-drawable-get-width mask-drawable)))
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(height (car (pika-drawable-get-height mask-drawable)))
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(img (car (pika-image-new width height GRAY)))
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(size (min width height))
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(offx1 (sota-scale size 0.33 chrome-factor))
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(offy1 (sota-scale size 0.25 chrome-factor))
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(offx2 (sota-scale size (- 0.33) chrome-factor))
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(offy2 (sota-scale size (- 0.25) chrome-factor))
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(feather (sota-scale size 0.5 chrome-factor))
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(brush-size (sota-scale size 0.5 chrome-factor))
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(brush-name (car (pika-brush-new "Chrome It")))
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(mask (car (pika-channel-new img width height "Chrome Stencil" 50 '(0 0 0))))
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(bg-layer (car (pika-layer-new img width height GRAY-IMAGE _"Background" 100 LAYER-MODE-NORMAL)))
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(layer1 (car (pika-layer-new img banding-width banding-height banding-type _"Layer 1" 100 LAYER-MODE-NORMAL)))
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(layer2 (car (pika-layer-new img width height GRAYA-IMAGE _"Layer 2" 100 LAYER-MODE-DIFFERENCE)))
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(layer3 (car (pika-layer-new img width height GRAYA-IMAGE _"Layer 3" 100 LAYER-MODE-NORMAL)))
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(shadow (car (pika-layer-new img width height GRAYA-IMAGE _"Drop Shadow" 100 LAYER-MODE-NORMAL)))
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(layer-mask 0)
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)
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(pika-context-push)
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(pika-context-set-defaults)
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(pika-image-undo-disable img)
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(pika-image-insert-channel img mask -1 0)
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(pika-image-insert-layer img bg-layer 0 0)
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(pika-image-insert-layer img shadow 0 0)
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(pika-image-insert-layer img layer3 0 0)
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(pika-image-insert-layer img layer2 0 0)
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(pika-edit-copy 1 (vector mask-drawable))
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; Clipboard is copy of mask-drawable. Paste into mask, a channel, and anchor it.
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(let* (
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(pasted (pika-edit-paste mask FALSE))
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(num-pasted (car pasted))
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(floating-sel (aref (cadr pasted) (- num-pasted 1)))
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)
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(pika-floating-sel-anchor floating-sel)
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)
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(if (= carve-white FALSE)
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(pika-drawable-invert mask FALSE)
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)
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(pika-context-set-background '(255 255 255))
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(pika-selection-none img)
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(pika-drawable-edit-fill layer2 FILL-BACKGROUND)
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(pika-drawable-edit-fill layer3 FILL-BACKGROUND)
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(pika-drawable-edit-clear shadow)
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(pika-item-set-visible bg-layer FALSE)
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(pika-item-set-visible shadow FALSE)
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(pika-image-select-item img CHANNEL-OP-REPLACE mask)
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(pika-context-set-background '(0 0 0))
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(pika-selection-translate img offx1 offy1)
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(pika-selection-feather img feather)
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(pika-drawable-edit-fill layer2 FILL-BACKGROUND)
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(pika-selection-translate img (* 2 offx2) (* 2 offy2))
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(pika-drawable-edit-fill layer3 FILL-BACKGROUND)
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(pika-selection-none img)
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(set! layer2 (car (pika-image-merge-visible-layers img CLIP-TO-IMAGE)))
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(pika-drawable-invert layer2 FALSE)
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(pika-image-insert-layer img layer1 0 0)
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(copy-layer-chrome-it img layer1 banding-img banding-layer)
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(pika-image-delete banding-img)
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(pika-layer-scale layer1 width height FALSE)
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(plug-in-gauss-iir RUN-NONINTERACTIVE img layer1 10 TRUE TRUE)
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(pika-layer-set-opacity layer1 50)
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(set! layer1 (car (pika-image-merge-visible-layers img CLIP-TO-IMAGE)))
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(pika-drawable-curves-spline layer1 HISTOGRAM-VALUE 18 (spline-chrome-it))
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(set! layer-mask (car (pika-layer-create-mask layer1 ADD-MASK-BLACK)))
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(pika-layer-add-mask layer1 layer-mask)
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(pika-image-select-item img CHANNEL-OP-REPLACE mask)
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(pika-context-set-background '(255 255 255))
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(pika-drawable-edit-fill layer-mask FILL-BACKGROUND)
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(set! layer2 (car (pika-layer-copy layer1 TRUE)))
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(pika-image-insert-layer img layer2 0 0)
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(pika-brush-set-shape brush-name BRUSH-GENERATED-CIRCLE)
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(pika-brush-set-spikes brush-name 2)
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(pika-brush-set-hardness brush-name 1.0)
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(pika-brush-set-spacing brush-name 25)
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(pika-brush-set-aspect-ratio brush-name 1)
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(pika-brush-set-angle brush-name 0)
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(cond (<= brush-size 17) (pika-brush-set-radius brush-name (\ brush-size 2))
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(else pika-brush-set-radius brush-name (\ 19 2)))
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(pika-context-set-brush brush-name)
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(pika-context-set-foreground '(255 255 255))
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(pika-drawable-edit-stroke-selection layer-mask)
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(pika-context-set-background '(0 0 0))
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(pika-selection-feather img (* feather 1.5))
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(pika-selection-translate img (* 2.5 offx1) (* 2.5 offy1))
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(pika-drawable-edit-fill shadow FILL-BACKGROUND)
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(pika-selection-all img)
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(pika-context-set-pattern "Marble #1")
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(pika-drawable-edit-fill bg-layer FILL-PATTERN)
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(pika-selection-none img)
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(pika-image-convert-rgb img)
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(pika-drawable-color-balance layer1 TRANSFER-SHADOWS TRUE
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(shadows (rval hc))
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(shadows (gval hc))
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(shadows (bval hc)))
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(pika-drawable-color-balance layer1 TRANSFER-MIDTONES TRUE
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(midtones (rval hc))
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(midtones (gval hc))
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(midtones (bval hc)))
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(pika-drawable-color-balance layer1 TRANSFER-HIGHLIGHTS TRUE
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(highlights (rval hc))
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(highlights (gval hc))
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(highlights (bval hc)))
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(pika-drawable-color-balance layer2 TRANSFER-SHADOWS TRUE
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(shadows (rval cc))
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(shadows (gval cc))
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(shadows (bval cc)))
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(pika-drawable-color-balance layer2 TRANSFER-MIDTONES TRUE
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(midtones (rval cc))
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(midtones (gval cc))
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(midtones (bval cc)))
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(pika-drawable-color-balance layer2 TRANSFER-HIGHLIGHTS TRUE
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(highlights (rval cc))
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(highlights (gval cc))
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(highlights (bval cc)))
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(pika-drawable-hue-saturation layer2 HUE-RANGE-ALL
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0.0
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chrome-lightness
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chrome-saturation
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0.0)
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(pika-item-set-visible shadow TRUE)
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(pika-item-set-visible bg-layer TRUE)
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(pika-item-set-name layer2 _"Chrome")
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(pika-item-set-name layer1 _"Highlight")
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(pika-image-remove-channel img mask)
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(pika-brush-delete brush-name)
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(pika-display-new img)
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(pika-image-undo-enable img)
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(pika-context-pop)
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)
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)
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(script-fu-register "script-fu-sota-chrome-it"
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_"Stencil C_hrome..."
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_"Add a chrome effect to the selected region (or alpha) using a specified (grayscale) stencil"
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"Spencer Kimball"
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"Spencer Kimball"
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"1997"
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"GRAY"
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SF-IMAGE "Chrome image" 0
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SF-DRAWABLE "Chrome mask" 0
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SF-ADJUSTMENT _"Chrome saturation" '(-80 -100 100 1 10 0 0)
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SF-ADJUSTMENT _"Chrome lightness" '(-47 -100 100 1 10 0 0)
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SF-ADJUSTMENT _"Chrome factor" '(0.75 0 1 0.1 0.2 2 0)
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SF-FILENAME _"Environment map"
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(string-append pika-data-directory
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"/scripts/images/beavis.jpg")
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SF-COLOR _"Highlight balance" '(211 95 0)
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SF-COLOR _"Chrome balance" "black"
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SF-TOGGLE _"Chrome white areas" TRUE
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)
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(script-fu-menu-register "script-fu-sota-chrome-it"
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"<Image>/Filters/Decor")
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