235 lines
8.6 KiB
Scheme
235 lines
8.6 KiB
Scheme
; CARVE-IT
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; Carving, embossing, & stamping
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; Process taken from "The Photoshop 3 WOW! Book"
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; http://www.peachpit.com
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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 carving effect
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; NOTE: This script requires the image to be carved to either be an
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; RGB color or grayscale image with a single layer. An indexed file
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; can not be used due to the use of pika-drawable-histogram and
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; pika-drawable-levels.
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(define (carve-scale val scale)
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(* (sqrt val) scale))
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(define (calculate-inset-gamma img layer)
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(let* ((stats (pika-drawable-histogram layer 0 0.0 1.0))
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(mean (car stats)))
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(cond ((< mean 127) (+ 1.0 (* 0.5 (/ (- 127 mean) 127.0))))
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((>= mean 127) (- 1.0 (* 0.5 (/ (- mean 127) 127.0)))))))
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(define (copy-layer-carve-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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(define (script-fu-carve-it mask-img mask-drawable bg-layer carve-white)
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(let* (
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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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(type (car (pika-drawable-type bg-layer)))
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(img (car (pika-image-new width height (cond ((= type RGB-IMAGE) RGB)
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((= type RGBA-IMAGE) RGB)
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((= type GRAY-IMAGE) GRAY)
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((= type GRAYA-IMAGE) GRAY)
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((= type INDEXED-IMAGE) INDEXED)
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((= type INDEXEDA-IMAGE) INDEXED)))))
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(size (min width height))
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(offx (carve-scale size 0.33))
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(offy (carve-scale size 0.25))
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(feather (carve-scale size 0.3))
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(brush-size (carve-scale size 0.3))
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(brush-name (car (pika-brush-new "Carve It")))
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(mask (car (pika-channel-new img width height "Engraving Mask" 50 '(0 0 0))))
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(inset-gamma (calculate-inset-gamma (car (pika-item-get-image bg-layer)) bg-layer))
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(mask-fat 0)
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(mask-emboss 0)
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(mask-highlight 0)
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(mask-shadow 0)
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(shadow-layer 0)
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(highlight-layer 0)
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(cast-shadow-layer 0)
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(csl-mask 0)
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(inset-layer 0)
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(il-mask 0)
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(bg-width (car (pika-drawable-get-width bg-layer)))
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(bg-height (car (pika-drawable-get-height bg-layer)))
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(bg-type (car (pika-drawable-type bg-layer)))
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(bg-image (car (pika-item-get-image bg-layer)))
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(layer1 (car (pika-layer-new img bg-width bg-height bg-type "Layer1" 100 LAYER-MODE-NORMAL)))
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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-layer img layer1 0 0)
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(pika-selection-all img)
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(pika-drawable-edit-clear layer1)
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(pika-selection-none img)
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(copy-layer-carve-it img layer1 bg-image bg-layer)
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(pika-edit-copy 1 (vector mask-drawable))
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(pika-image-insert-channel img mask -1 0)
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(plug-in-tile RUN-NONINTERACTIVE img 1 (vector layer1) width height FALSE)
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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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(set! mask-fat (car (pika-channel-copy mask)))
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(pika-image-insert-channel img mask-fat -1 0)
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(pika-image-select-item img CHANNEL-OP-REPLACE mask-fat)
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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 mask-fat)
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(pika-selection-none img)
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(set! mask-emboss (car (pika-channel-copy mask-fat)))
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(pika-image-insert-channel img mask-emboss -1 0)
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(plug-in-gauss-rle RUN-NONINTERACTIVE img mask-emboss feather TRUE TRUE)
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(plug-in-emboss RUN-NONINTERACTIVE img mask-emboss 315.0 45.0 7 TRUE)
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(pika-context-set-background '(180 180 180))
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(pika-image-select-item img CHANNEL-OP-REPLACE mask-fat)
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(pika-selection-invert img)
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(pika-drawable-edit-fill mask-emboss FILL-BACKGROUND)
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(pika-image-select-item img CHANNEL-OP-REPLACE mask)
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(pika-drawable-edit-fill mask-emboss FILL-BACKGROUND)
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(pika-selection-none img)
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(set! mask-highlight (car (pika-channel-copy mask-emboss)))
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(pika-image-insert-channel img mask-highlight -1 0)
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(pika-drawable-levels mask-highlight 0
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0.7056 1.0 TRUE
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1.0
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0.0 1.0 TRUE)
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(set! mask-shadow mask-emboss)
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(pika-drawable-levels mask-shadow 0
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0.0 0.70586 TRUE
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1.0
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0.0 1.0 TRUE)
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(pika-edit-copy 1 (vector mask-shadow))
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(let* (
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(pasted (pika-edit-paste layer1 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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(set! shadow-layer floating-sel)
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(pika-floating-sel-to-layer shadow-layer)
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)
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(pika-layer-set-mode shadow-layer LAYER-MODE-MULTIPLY)
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(pika-edit-copy 1 (vector mask-highlight))
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(let* (
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(pasted (pika-edit-paste shadow-layer 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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(set! highlight-layer floating-sel)
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(pika-floating-sel-to-layer highlight-layer)
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)
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(pika-layer-set-mode highlight-layer LAYER-MODE-SCREEN)
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(pika-edit-copy 1 (vector mask))
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(let* (
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(pasted (pika-edit-paste highlight-layer 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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(set! cast-shadow-layer floating-sel)
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(pika-floating-sel-to-layer cast-shadow-layer)
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)
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(pika-layer-set-mode cast-shadow-layer LAYER-MODE-MULTIPLY)
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(pika-layer-set-opacity cast-shadow-layer 75)
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(plug-in-gauss-rle RUN-NONINTERACTIVE img cast-shadow-layer feather TRUE TRUE)
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(pika-item-transform-translate cast-shadow-layer offx offy)
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(set! csl-mask (car (pika-layer-create-mask cast-shadow-layer ADD-MASK-BLACK)))
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(pika-layer-add-mask cast-shadow-layer csl-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 csl-mask FILL-BACKGROUND)
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(set! inset-layer (car (pika-layer-copy layer1 TRUE)))
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(pika-image-insert-layer img inset-layer 0 1)
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(set! il-mask (car (pika-layer-create-mask inset-layer ADD-MASK-BLACK)))
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(pika-layer-add-mask inset-layer il-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 il-mask FILL-BACKGROUND)
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(pika-selection-none img)
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(pika-selection-none bg-image)
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(pika-drawable-levels inset-layer 0 0.0 1.0 TRUE inset-gamma 0.0 1.0 TRUE)
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(pika-image-remove-channel img mask)
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(pika-image-remove-channel img mask-fat)
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(pika-image-remove-channel img mask-highlight)
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(pika-image-remove-channel img mask-shadow)
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(pika-item-set-name layer1 _"Carved Surface")
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(pika-item-set-name shadow-layer _"Bevel Shadow")
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(pika-item-set-name highlight-layer _"Bevel Highlight")
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(pika-item-set-name cast-shadow-layer _"Cast Shadow")
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(pika-item-set-name inset-layer _"Inset")
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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-carve-it"
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_"Stencil C_arve..."
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_"Use the specified drawable as a stencil to carve from the specified image."
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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 "Mask image" 0
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SF-DRAWABLE "Mask drawable" 0
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SF-DRAWABLE _"Image to carve" 0
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SF-TOGGLE _"Carve white areas" TRUE
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)
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(script-fu-menu-register "script-fu-carve-it"
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"<Image>/Filters/Decor")
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