mirror of https://github.com/GNOME/gimp.git
190 lines
6.8 KiB
Scheme
190 lines
6.8 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 colour or grayscale image with a single layer. An indexed file
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; can not be used due to the use of gimp-histogram and gimp-levels.
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(define (carve-brush brush-size)
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(cond ((<= brush-size 5) "Circle (05)")
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((<= brush-size 7) "Circle (07)")
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((<= brush-size 9) "Circle (09)")
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((<= brush-size 11) "Circle (11)")
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((<= brush-size 13) "Circle (13)")
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((<= brush-size 15) "Circle (15)")
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((<= brush-size 17) "Circle (17)")
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(else "Circle (19)")))
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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 (gimp-histogram layer 0 0 255))
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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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(gimp-selection-all dest-image)
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(gimp-edit-clear dest-drawable)
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(gimp-selection-none dest-image)
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(gimp-selection-all source-image)
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(gimp-edit-copy source-drawable)
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(let ((floating-sel (car (gimp-edit-paste dest-drawable FALSE))))
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(gimp-floating-sel-anchor floating-sel)))
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(define (script-fu-carve-it mask-img mask-drawable bg-layer carve-white)
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(let* ((width (car (gimp-drawable-width mask-drawable)))
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(height (car (gimp-drawable-height mask-drawable)))
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(type (car (gimp-drawable-type bg-layer)))
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(img (car (gimp-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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(mask-fs 0)
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(mask (car (gimp-channel-new img width height "Engraving Mask" 50 '(0 0 0))))
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(inset-gamma (calculate-inset-gamma (car (gimp-drawable-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 (gimp-drawable-width bg-layer)))
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(bg-height (car (gimp-drawable-height bg-layer)))
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(bg-type (car (gimp-drawable-type bg-layer)))
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(bg-image (car (gimp-drawable-get-image bg-layer)))
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(layer1 (car (gimp-layer-new img bg-width bg-height bg-type "Layer1" 100 NORMAL-MODE))))
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(gimp-context-push)
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(gimp-image-undo-disable img)
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(gimp-image-add-layer img layer1 0)
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(gimp-selection-all img)
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(gimp-edit-clear layer1)
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(gimp-selection-none img)
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(copy-layer-carve-it img layer1 bg-image bg-layer)
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(gimp-edit-copy mask-drawable)
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(gimp-image-add-channel img mask 0)
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(plug-in-tile 1 img layer1 width height FALSE)
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(set! mask-fs (car (gimp-edit-paste mask FALSE)))
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(gimp-floating-sel-anchor mask-fs)
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(if (= carve-white FALSE)
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(gimp-invert mask))
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(set! mask-fat (car (gimp-channel-copy mask)))
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(gimp-image-add-channel img mask-fat 0)
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(gimp-selection-load mask-fat)
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(gimp-context-set-brush (carve-brush brush-size))
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(gimp-context-set-foreground '(255 255 255))
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(gimp-edit-stroke mask-fat)
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(gimp-selection-none img)
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(set! mask-emboss (car (gimp-channel-copy mask-fat)))
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(gimp-image-add-channel img mask-emboss 0)
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(plug-in-gauss-rle 1 img mask-emboss feather TRUE TRUE)
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(plug-in-emboss 1 img mask-emboss 315.0 45.0 7 TRUE)
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(gimp-context-set-background '(180 180 180))
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(gimp-selection-load mask-fat)
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(gimp-selection-invert img)
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(gimp-edit-fill mask-emboss BACKGROUND-FILL)
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(gimp-selection-load mask)
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(gimp-edit-fill mask-emboss BACKGROUND-FILL)
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(gimp-selection-none img)
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(set! mask-highlight (car (gimp-channel-copy mask-emboss)))
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(gimp-image-add-channel img mask-highlight 0)
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(gimp-levels mask-highlight 0 180 255 1.0 0 255)
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(set! mask-shadow mask-emboss)
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(gimp-levels mask-shadow 0 0 180 1.0 0 255)
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(gimp-edit-copy mask-shadow)
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(set! shadow-layer (car (gimp-edit-paste layer1 FALSE)))
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(gimp-floating-sel-to-layer shadow-layer)
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(gimp-layer-set-mode shadow-layer MULTIPLY-MODE)
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(gimp-edit-copy mask-highlight)
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(set! highlight-layer (car (gimp-edit-paste shadow-layer FALSE)))
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(gimp-floating-sel-to-layer highlight-layer)
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(gimp-layer-set-mode highlight-layer SCREEN-MODE)
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(gimp-edit-copy mask)
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(set! cast-shadow-layer (car (gimp-edit-paste highlight-layer FALSE)))
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(gimp-floating-sel-to-layer cast-shadow-layer)
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(gimp-layer-set-mode cast-shadow-layer MULTIPLY-MODE)
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(gimp-layer-set-opacity cast-shadow-layer 75)
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(plug-in-gauss-rle 1 img cast-shadow-layer feather TRUE TRUE)
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(gimp-layer-translate cast-shadow-layer offx offy)
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(set! csl-mask (car (gimp-layer-create-mask cast-shadow-layer ADD-BLACK-MASK)))
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(gimp-layer-add-mask cast-shadow-layer csl-mask)
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(gimp-selection-load mask)
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(gimp-context-set-background '(255 255 255))
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(gimp-edit-fill csl-mask BACKGROUND-FILL)
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(set! inset-layer (car (gimp-layer-copy layer1 TRUE)))
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(gimp-image-add-layer img inset-layer 1)
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(set! il-mask (car (gimp-layer-create-mask inset-layer ADD-BLACK-MASK)))
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(gimp-layer-add-mask inset-layer il-mask)
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(gimp-selection-load mask)
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(gimp-context-set-background '(255 255 255))
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(gimp-edit-fill il-mask BACKGROUND-FILL)
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(gimp-selection-none img)
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(gimp-selection-none bg-image)
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(gimp-levels inset-layer 0 0 255 inset-gamma 0 255)
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(gimp-image-remove-channel img mask)
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(gimp-image-remove-channel img mask-fat)
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(gimp-image-remove-channel img mask-highlight)
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(gimp-image-remove-channel img mask-shadow)
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(gimp-drawable-set-name layer1 "Carved Surface")
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(gimp-drawable-set-name shadow-layer "Bevel Shadow")
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(gimp-drawable-set-name highlight-layer "Bevel Highlight")
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(gimp-drawable-set-name cast-shadow-layer "Cast Shadow")
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(gimp-drawable-set-name inset-layer "Inset")
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(gimp-display-new img)
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(gimp-image-undo-enable img)
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(gimp-context-pop)))
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(script-fu-register "script-fu-carve-it"
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_"C_arve-It..."
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"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."
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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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(script-fu-menu-register "script-fu-carve-it"
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"<Image>/Filters/Decor/Stencil Ops")
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