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; CARVE-IT
; Carving, embossing, & stamping
; Process taken from "The Photoshop 3 WOW! Book"
; http://www.peachpit.com
; This script requires a grayscale image containing a single layer.
; This layer is used as the mask for the carving effect
; NOTE: This script requires the image to be carved to either be an
; RGB colour or grayscale image with a single layer. An indexed file
; can not be used due to the use of gimp-histogram and gimp-levels.
(define (carve-brush brush-size)
(cond ((<= brush-size 5) "Circle (05)")
((<= brush-size 7) "Circle (07)")
((<= brush-size 9) "Circle (09)")
((<= brush-size 11) "Circle (11)")
((<= brush-size 13) "Circle (13)")
((<= brush-size 15) "Circle (15)")
((<= brush-size 17) "Circle (17)")
(else "Circle (19)")))
(define (carve-scale val scale)
(* (sqrt val) scale))
(define (calculate-inset-gamma img layer)
(let* ((stats (gimp-histogram layer 0 0 255))
(mean (car stats)))
(cond ((< mean 127) (+ 1.0 (* 0.5 (/ (- 127 mean) 127.0))))
((>= mean 127) (- 1.0 (* 0.5 (/ (- mean 127) 127.0)))))))
(define (copy-layer-carve-it dest-image dest-drawable source-image source-drawable)
(gimp-selection-all dest-image)
(gimp-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)))
(define (script-fu-carve-it mask-img mask-drawable bg-layer carve-white)
(let* (
(width (car (gimp-drawable-width mask-drawable)))
(height (car (gimp-drawable-height mask-drawable)))
(type (car (gimp-drawable-type bg-layer)))
(img (car (gimp-image-new width height (cond ((= type RGB-IMAGE) RGB)
((= type RGBA-IMAGE) RGB)
((= type GRAY-IMAGE) GRAY)
((= type GRAYA-IMAGE) GRAY)
((= type INDEXED-IMAGE) INDEXED)
((= type INDEXEDA-IMAGE) INDEXED)))))
(size (min width height))
(offx (carve-scale size 0.33))
(offy (carve-scale size 0.25))
(feather (carve-scale size 0.3))
(brush-size (carve-scale size 0.3))
(mask-fs 0)
(mask (car (gimp-channel-new img width height "Engraving Mask" 50 '(0 0 0))))
(inset-gamma (calculate-inset-gamma (car (gimp-drawable-get-image bg-layer)) bg-layer))
(mask-fat 0)
(mask-emboss 0)
(mask-highlight 0)
(mask-shadow 0)
(shadow-layer 0)
(highlight-layer 0)
(cast-shadow-layer 0)
(csl-mask 0)
(inset-layer 0)
(il-mask 0)
(bg-width (car (gimp-drawable-width bg-layer)))
(bg-height (car (gimp-drawable-height bg-layer)))
(bg-type (car (gimp-drawable-type bg-layer)))
(bg-image (car (gimp-drawable-get-image bg-layer)))
(layer1 (car (gimp-layer-new img bg-width bg-height bg-type "Layer1" 100 NORMAL-MODE)))
)
(gimp-context-push)
(gimp-image-undo-disable img)
(gimp-image-add-layer img layer1 0)
(gimp-selection-all img)
(gimp-edit-clear layer1)
(gimp-selection-none img)
(copy-layer-carve-it img layer1 bg-image bg-layer)
(gimp-edit-copy mask-drawable)
(gimp-image-add-channel img mask 0)
(plug-in-tile 1 img layer1 width height FALSE)
(set! mask-fs (car (gimp-edit-paste mask FALSE)))
(gimp-floating-sel-anchor mask-fs)
(if (= carve-white FALSE)
(gimp-invert mask))
(set! mask-fat (car (gimp-channel-copy mask)))
(gimp-image-add-channel img mask-fat 0)
(gimp-selection-load mask-fat)
(gimp-context-set-brush (carve-brush brush-size))
(gimp-context-set-foreground '(255 255 255))
(gimp-edit-stroke mask-fat)
(gimp-selection-none img)
(set! mask-emboss (car (gimp-channel-copy mask-fat)))
(gimp-image-add-channel img mask-emboss 0)
(plug-in-gauss-rle 1 img mask-emboss feather TRUE TRUE)
(plug-in-emboss 1 img mask-emboss 315.0 45.0 7 TRUE)
(gimp-context-set-background '(180 180 180))
(gimp-selection-load mask-fat)
(gimp-selection-invert img)
(gimp-edit-fill mask-emboss BACKGROUND-FILL)
(gimp-selection-load mask)
(gimp-edit-fill mask-emboss BACKGROUND-FILL)
(gimp-selection-none img)
(set! mask-highlight (car (gimp-channel-copy mask-emboss)))
(gimp-image-add-channel img mask-highlight 0)
(gimp-levels mask-highlight 0 180 255 1.0 0 255)
(set! mask-shadow mask-emboss)
(gimp-levels mask-shadow 0 0 180 1.0 0 255)
(gimp-edit-copy mask-shadow)
(set! shadow-layer (car (gimp-edit-paste layer1 FALSE)))
(gimp-floating-sel-to-layer shadow-layer)
(gimp-layer-set-mode shadow-layer MULTIPLY-MODE)
(gimp-edit-copy mask-highlight)
(set! highlight-layer (car (gimp-edit-paste shadow-layer FALSE)))
(gimp-floating-sel-to-layer highlight-layer)
(gimp-layer-set-mode highlight-layer SCREEN-MODE)
(gimp-edit-copy mask)
(set! cast-shadow-layer (car (gimp-edit-paste highlight-layer FALSE)))
(gimp-floating-sel-to-layer cast-shadow-layer)
(gimp-layer-set-mode cast-shadow-layer MULTIPLY-MODE)
(gimp-layer-set-opacity cast-shadow-layer 75)
(plug-in-gauss-rle 1 img cast-shadow-layer feather TRUE TRUE)
(gimp-layer-translate cast-shadow-layer offx offy)
(set! csl-mask (car (gimp-layer-create-mask cast-shadow-layer ADD-BLACK-MASK)))
(gimp-layer-add-mask cast-shadow-layer csl-mask)
(gimp-selection-load mask)
(gimp-context-set-background '(255 255 255))
(gimp-edit-fill csl-mask BACKGROUND-FILL)
(set! inset-layer (car (gimp-layer-copy layer1 TRUE)))
(gimp-image-add-layer img inset-layer 1)
(set! il-mask (car (gimp-layer-create-mask inset-layer ADD-BLACK-MASK)))
(gimp-layer-add-mask inset-layer il-mask)
(gimp-selection-load mask)
(gimp-context-set-background '(255 255 255))
(gimp-edit-fill il-mask BACKGROUND-FILL)
(gimp-selection-none img)
(gimp-selection-none bg-image)
(gimp-levels inset-layer 0 0 255 inset-gamma 0 255)
(gimp-image-remove-channel img mask)
(gimp-image-remove-channel img mask-fat)
(gimp-image-remove-channel img mask-highlight)
(gimp-image-remove-channel img mask-shadow)
(gimp-drawable-set-name layer1 "Carved Surface")
(gimp-drawable-set-name shadow-layer "Bevel Shadow")
(gimp-drawable-set-name highlight-layer "Bevel Highlight")
(gimp-drawable-set-name cast-shadow-layer "Cast Shadow")
(gimp-drawable-set-name inset-layer "Inset")
(gimp-display-new img)
(gimp-image-undo-enable img)
(gimp-context-pop)
)
)
(script-fu-register "script-fu-carve-it"
_"Stencil C_arve..."
"Use the specified [GRAY] drawable as a stencil to carve from the specified image. The specified image must be either RGB colour or grayscale, not indexed."
"Spencer Kimball"
"Spencer Kimball"
"1997"
"GRAY"
SF-IMAGE "Mask image" 0
SF-DRAWABLE "Mask drawable" 0
SF-DRAWABLE _"Image to carve" 0
SF-TOGGLE _"Carve white areas" TRUE
)
(script-fu-menu-register "script-fu-carve-it"
"<Image>/Filters/Decor")
|