/usr/share/gimp/2.0/scripts/neon-logo.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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 | ; 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/>.
;
; NEON
; Create a text effect that simulates neon lighting
(define (apply-neon-logo-effect img
tube-layer
size
bg-color
glow-color
shadow)
(define (set-pt a index x y)
(begin
(aset a (* index 2) x)
(aset a (+ (* index 2) 1) y)))
(define (neon-spline1)
(let* ((a (cons-array 6 'byte)))
(set-pt a 0 0 0)
(set-pt a 1 127 145)
(set-pt a 2 255 255)
a))
(define (neon-spline2)
(let* ((a (cons-array 6 'byte)))
(set-pt a 0 0 0)
(set-pt a 1 110 150)
(set-pt a 2 255 255)
a))
(define (neon-spline3)
(let* ((a (cons-array 6 'byte)))
(set-pt a 0 0 0)
(set-pt a 1 100 185)
(set-pt a 2 255 255)
a))
(define (neon-spline4)
(let* ((a (cons-array 8 'byte)))
(set-pt a 0 0 0)
(set-pt a 1 64 64)
(set-pt a 2 127 192)
(set-pt a 3 255 255)
a))
(define (find-hue-offset color)
(let* (
(R (car color))
(G (cadr color))
(B (caddr color))
(max-val (max R G B))
(min-val (min R G B))
(delta (- max-val min-val))
(hue 0)
)
(if (= delta 0)
0
(begin
(cond
((= max-val R)
(set! hue (/ (- G B) (* 1.0 delta))))
((= max-val G)
(set! hue (+ 2 (/ (- B R) (* 1.0 delta)))))
((= max-val B)
(set! hue (+ 4 (/ (- R G) (* 1.0 delta)))))
)
(set! hue (* hue 60))
(if (< hue 0) (set! hue (+ hue 360)))
(if (> hue 360) (set! hue (- hue 360)))
(if (> hue 180) (set! hue (- hue 360)))
hue
)
)
)
)
(let* (
(tube-hue (find-hue-offset glow-color))
(shrink (/ size 14))
(grow (/ size 40))
(feather (/ size 5))
(feather1 (/ size 25))
(feather2 (/ size 12))
(inc-shrink (/ size 100))
(shadow-shrink (/ size 40))
(shadow-feather (/ size 20))
(shadow-offx (/ size 10))
(shadow-offy (/ size 10))
(width (car (gimp-drawable-width tube-layer)))
(height (car (gimp-drawable-height tube-layer)))
(glow-layer (car (gimp-layer-new img width height RGBA-IMAGE
"Neon Glow" 100 NORMAL-MODE)))
(bg-layer (car (gimp-layer-new img width height RGB-IMAGE
"Background" 100 NORMAL-MODE)))
(shadow-layer (if (= shadow TRUE)
(car (gimp-layer-new img width height RGBA-IMAGE
"Shadow" 100 NORMAL-MODE))
0))
(selection 0)
(max_shrink 0)
)
(gimp-context-push)
(gimp-context-set-defaults)
; ensure that we don't shrink selection so much
; that we create an empty selection.
(gimp-image-select-item img CHANNEL-OP-REPLACE tube-layer)
(while (= (car (gimp-selection-is-empty img)) FALSE)
(begin
(gimp-selection-shrink img 1)
(set! max_shrink (+ max_shrink 1))
; escape early if we know that we can perform
; as much shrink steps as we want
(if (> max_shrink shrink)
(gimp-selection-none img))
)
)
(if (= (car (gimp-selection-is-empty img)) TRUE)
(if (> max_shrink 0)
(set! max_shrink (- max_shrink 1))))
; clamp upper bounds to valid shrink step range
(if (> shrink max_shrink)
(set! shrink max_shrink))
(if (> inc-shrink (/ max_shrink 3))
(set! inc-shrink (/ max_shrink 3)))
(if (> shadow-shrink max_shrink)
(set! shadow-shrink max_shrink))
(script-fu-util-image-resize-from-layer img tube-layer)
(script-fu-util-image-add-layers img glow-layer bg-layer)
(if (not (= shadow 0))
(begin
(gimp-image-insert-layer img shadow-layer 0 -1)
(gimp-edit-clear shadow-layer)))
(gimp-context-set-background '(0 0 0))
(gimp-image-select-item img CHANNEL-OP-REPLACE tube-layer)
(set! selection (car (gimp-selection-save img)))
(gimp-selection-none img)
(gimp-edit-clear glow-layer)
(gimp-edit-clear tube-layer)
(gimp-context-set-background bg-color)
(gimp-edit-fill bg-layer BACKGROUND-FILL)
(gimp-image-select-item img CHANNEL-OP-REPLACE selection)
(gimp-context-set-background '(255 255 255))
(gimp-edit-fill tube-layer BACKGROUND-FILL)
(gimp-selection-shrink img shrink)
(gimp-context-set-background '(0 0 0))
(gimp-edit-fill selection BACKGROUND-FILL)
(gimp-edit-clear tube-layer)
(gimp-selection-none img)
(if (not (= feather1 0))
(plug-in-gauss-rle RUN-NONINTERACTIVE img tube-layer feather1 TRUE TRUE))
(gimp-image-select-item img CHANNEL-OP-REPLACE selection)
(if (not (= feather2 0))
(plug-in-gauss-rle RUN-NONINTERACTIVE img tube-layer feather2 TRUE TRUE))
(gimp-selection-feather img inc-shrink)
(gimp-selection-shrink img inc-shrink)
(gimp-curves-spline tube-layer 4 6 (neon-spline1))
(gimp-image-select-item img CHANNEL-OP-REPLACE selection)
(gimp-selection-feather img inc-shrink)
(gimp-selection-shrink img (* inc-shrink 2))
(gimp-curves-spline tube-layer 4 6 (neon-spline2))
(gimp-image-select-item img CHANNEL-OP-REPLACE selection)
(gimp-selection-feather img inc-shrink)
(gimp-selection-shrink img (* inc-shrink 3))
(gimp-curves-spline tube-layer 4 6 (neon-spline3))
(gimp-layer-set-lock-alpha tube-layer 1)
(gimp-image-select-item img CHANNEL-OP-REPLACE tube-layer)
(gimp-selection-invert img)
(gimp-context-set-background glow-color)
(gimp-edit-fill tube-layer BACKGROUND-FILL)
(gimp-selection-none img)
(gimp-layer-set-lock-alpha tube-layer 0)
(gimp-curves-spline tube-layer 4 8 (neon-spline4))
(gimp-image-select-item img CHANNEL-OP-REPLACE selection)
(gimp-selection-grow img grow)
(gimp-selection-invert img)
(gimp-edit-clear tube-layer)
(gimp-selection-invert img)
(gimp-selection-feather img feather)
(gimp-edit-fill glow-layer BACKGROUND-FILL)
(if (not (= shadow 0))
(begin
(gimp-image-select-item img CHANNEL-OP-REPLACE selection)
(gimp-selection-grow img grow)
(gimp-selection-shrink img shadow-shrink)
(gimp-selection-feather img shadow-feather)
(gimp-selection-translate img shadow-offx shadow-offy)
(gimp-context-set-background '(0 0 0))
(gimp-edit-fill shadow-layer BACKGROUND-FILL)))
(gimp-selection-none img)
(gimp-item-set-name tube-layer "Neon Tubes")
(gimp-image-remove-channel img selection)
(gimp-context-pop)
)
)
(define (script-fu-neon-logo-alpha img
tube-layer
size
bg-color
glow-color
shadow)
(begin
(gimp-image-undo-group-start img)
(apply-neon-logo-effect img tube-layer (* size 5) bg-color glow-color shadow)
(gimp-image-undo-group-end img)
(gimp-displays-flush)
)
)
(script-fu-register "script-fu-neon-logo-alpha"
_"N_eon..."
_"Convert the selected region (or alpha) into a neon-sign like object"
"Spencer Kimball"
"Spencer Kimball"
"1997"
"RGBA"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT _"Effect size (pixels)" '(30 1 200 1 10 0 1)
SF-COLOR _"Background color" "black"
SF-COLOR _"Glow color" '(38 211 255)
SF-TOGGLE _"Create shadow" FALSE
)
(script-fu-menu-register "script-fu-neon-logo-alpha"
"<Image>/Filters/Alpha to Logo")
(define (script-fu-neon-logo text
size
font
bg-color
glow-color
shadow)
(let* (
(img (car (gimp-image-new 256 256 RGB)))
(border (/ size 4))
(tube-layer (car (gimp-text-fontname img -1 0 0 text border TRUE size PIXELS font)))
)
(gimp-image-undo-disable img)
(apply-neon-logo-effect img tube-layer size bg-color glow-color shadow)
(gimp-image-undo-enable img)
(gimp-display-new img)
)
)
(script-fu-register "script-fu-neon-logo"
_"N_eon..."
_"Create a logo in the style of a neon sign"
"Spencer Kimball"
"Spencer Kimball"
"1997"
""
SF-STRING _"Text" "NEON"
SF-ADJUSTMENT _"Font size (pixels)" '(150 2 1000 1 10 0 1)
SF-FONT _"Font" "Blippo"
SF-COLOR _"Background color" "black"
SF-COLOR _"Glow color" '(38 211 255)
SF-TOGGLE _"Create shadow" FALSE
)
(script-fu-menu-register "script-fu-neon-logo"
"<Image>/File/Create/Logos")
|