/usr/share/gimp/2.0/scripts/chalk.scm is in gimp-data 2.8.16-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | ; GIMP - The GNU Image Manipulation Program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <http://www.gnu.org/licenses/>.
;
; chalk.scm version 0.11 10/10/97
;
; Copyright (C) 1997 Manish Singh <msingh@uclink4.berkeley.edu>
;
; Makes a logo with a chalk-like text effect.
(define (apply-chalk-logo-effect img
logo-layer
bg-color)
(let* (
(width (car (gimp-drawable-width logo-layer)))
(height (car (gimp-drawable-height logo-layer)))
(bg-layer (car (gimp-layer-new img
width height RGB-IMAGE
"Background" 100 NORMAL-MODE)))
)
(gimp-context-push)
(gimp-context-set-feather FALSE)
(gimp-selection-none img)
(script-fu-util-image-resize-from-layer img logo-layer)
(script-fu-util-image-add-layers img bg-layer)
(gimp-context-set-background bg-color)
(gimp-edit-fill bg-layer BACKGROUND-FILL)
; the actual effect
(gimp-layer-set-lock-alpha logo-layer FALSE)
(plug-in-gauss-rle RUN-NONINTERACTIVE img logo-layer 2.0 1 1)
(plug-in-spread RUN-NONINTERACTIVE img logo-layer 5.0 5.0)
(plug-in-ripple RUN-NONINTERACTIVE img logo-layer 27 2 0 0 0 TRUE TRUE)
(plug-in-ripple RUN-NONINTERACTIVE img logo-layer 27 2 1 0 0 TRUE TRUE)
; sobel doesn't work on a layer with transparency, so merge layers:
(let ((logo-layer
(car (gimp-image-merge-down img logo-layer EXPAND-AS-NECESSARY))))
(plug-in-sobel RUN-NONINTERACTIVE img logo-layer TRUE TRUE TRUE)
(gimp-levels logo-layer 0 0 120 3.5 0 255)
; work-around for sobel edge detect screw-up (why does this happen?)
; the top line of the image has some garbage instead of the bgcolor
(gimp-image-select-rectangle img CHANNEL-OP-ADD 0 0 width 1)
(gimp-edit-clear logo-layer)
)
(gimp-selection-none img)
(gimp-context-pop)
)
)
(define (script-fu-chalk-logo-alpha img
logo-layer
bg-color)
(begin
(gimp-image-undo-group-start img)
(apply-chalk-logo-effect img logo-layer bg-color)
(gimp-image-undo-group-end img)
(gimp-displays-flush)
)
)
(script-fu-register "script-fu-chalk-logo-alpha"
_"_Chalk..."
_"Create a chalk drawing effect for the selected region (or alpha)"
"Manish Singh <msingh@uclink4.berkeley.edu>"
"Manish Singh"
"October 1997"
"RGBA"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-COLOR _"Background color" "black"
)
(script-fu-menu-register "script-fu-chalk-logo-alpha"
"<Image>/Filters/Alpha to Logo")
(define (script-fu-chalk-logo text
size
font
bg-color
chalk-color)
(let* (
(img (car (gimp-image-new 256 256 RGB)))
(border (/ size 4))
(text-layer (car (gimp-text-fontname img -1 0 0 text border TRUE size PIXELS font)))
)
(gimp-context-push)
(gimp-image-undo-disable img)
(gimp-context-set-foreground chalk-color)
(gimp-layer-set-lock-alpha text-layer TRUE)
(gimp-edit-fill text-layer FOREGROUND-FILL)
(apply-chalk-logo-effect img text-layer bg-color)
(gimp-image-undo-enable img)
(gimp-display-new img)
(gimp-context-pop)
)
)
(script-fu-register "script-fu-chalk-logo"
_"_Chalk..."
_"Create a logo resembling chalk scribbled on a blackboard"
"Manish Singh <msingh@uclink4.berkeley.edu>"
"Manish Singh"
"October 1997"
""
SF-STRING _"Text" "CHALK"
SF-ADJUSTMENT _"Font size (pixels)" '(150 2 1000 1 10 0 1)
SF-FONT _"Font" "Sans"
SF-COLOR _"Background color" "black"
SF-COLOR _"Chalk color" "white"
)
(script-fu-menu-register "script-fu-chalk-logo"
"<Image>/File/Create/Logos")
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