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FU_effects_chrome-image.scm
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; FU_effects_chrome-image.scm
; version 2.8 [gimphelp.org]
; last modified/tested by Paul Sherman
; 02/14/2014 on GIMP-2.8.10
; 03/09/2020 on GIMP-2.10.20 by karlhof26
;
; 12/14/2008 took out color layer - made use confusing for me
;
; edited - 11/27/2008 by Paul Sherman
; removing deprecated functions
;
; 10-/15/2010 - tweaked default settings, emboss was to much...
; 02/14/2014 - convert to RGB if needed
;==============================================================
;
; Installation:
; This script should be placed in the user or system-wide script folder.
;
; Windows Vista/7/8)
; C:\Program Files\GIMP 2\share\gimp\2.0\scripts
; or
; C:\Users\YOUR-NAME\.gimp-2.8\scripts
;
; Windows XP
; C:\Program Files\GIMP 2\share\gimp\2.0\scripts
; or
; C:\Documents and Settings\yourname\.gimp-2.8\scripts
;
; Linux
; /home/yourname/.gimp-2.8/scripts
; or
; Linux system-wide
; /usr/share/gimp/2.0/scripts
;
;==============================================================
;
; LICENSE
;
; 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/>.
;
;==============================================================
; Original information
;
; Chrome image script for GIMP 1.2
; Copyright (C) 2001-2002 Iccii <iccii@hotmail.com>
;==============================================================
(define (FU-chrome-image
img
drawable
contrast
deform
random_b
emboss?
bright
stopearly
)
(gimp-image-undo-group-start img)
(if (not (= RGB (car (gimp-image-base-type img))))
(gimp-image-convert-rgb img)
)
(let* (
(width (car (gimp-drawable-width drawable)))
(height (car (gimp-drawable-height drawable)))
(old-fg (car (gimp-context-get-foreground)))
(image-type (if (eqv? (car (gimp-drawable-is-gray drawable)) TRUE)
GRAYA-IMAGE
RGBA-IMAGE))
(point-num (round (+ 2 (* random_b 2))))
(step (round (/ 255 (+ (* random_b 2) 1))))
(control_pts (cons-array (* point-num 2) 'byte))
(count 0)
)
(if (eqv? (car (gimp-drawable-is-gray drawable)) FALSE)
(gimp-drawable-desaturate drawable DESATURATE-LUMINANCE)
)
(plug-in-gauss-iir2 1 img drawable deform deform)
(gimp-displays-flush)
(if (= emboss? TRUE)
(plug-in-emboss 1 img drawable 30 45.0 35 1)
;(gimp-drawable-levels drawable HISTOGRAM-VALUE 0.3 0.9 TRUE 1.15 0.0 1.0 TRUE)
)
(gimp-displays-flush)
(if (= stopearly TRUE)
(begin
)
(begin
(aset control_pts 0 0)
(aset control_pts 1 0); was 1 0
(while (< count random_b)
(aset control_pts (+ (* count 4) 2) (round (* step (+ (* count 2) 1))))
(aset control_pts (+ (* count 4) 3) (+ 128 contrast))
(aset control_pts (+ (* count 4) 4) (round (* step (+ (* count 2) 2))))
(aset control_pts (+ (* count 4) 5) (- 128 contrast))
(set! count (+ count 1))
)
(aset control_pts (- (* point-num 2) 2) 255) ; was 255
(aset control_pts (- (* point-num 2) 1) 255) ; was 255
(gimp-curves-spline drawable HISTOGRAM-VALUE (* point-num 2) control_pts)
)
)
(gimp-displays-flush)
;(quit)
(if (= bright TRUE)
(begin
(gimp-drawable-brightness-contrast drawable 0.32 0.39)
(gimp-drawable-levels drawable HISTOGRAM-VALUE 0.40 0.99 TRUE 1.88 0.0 1.0 TRUE)
(gimp-drawable-brightness-contrast drawable 0.0 0.48)
)
)
(gimp-context-set-foreground old-fg)
(gimp-image-undo-group-end img)
(gimp-displays-flush)
(gc) ; garbage collect; an array was used
)
)
(script-fu-register
"FU-chrome-image"
"<Toolbox>/Script-Fu/Effects/Chrome Image"
"Create chrome image. Useful when you want to create metallic surfaces. Works best on transparent layer with thick lines that are not black. \nfile:FU_effects_chrome-image.scm"
"Iccii <iccii@hotmail.com>"
"Iccii"
"2002, Feb"
"*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT "Contrast variation" '(40 0 127 1 1 0 0)
SF-ADJUSTMENT "Deformation" '(23 1 50 1 10 0 0)
SF-ADJUSTMENT "Randomness" '(4 1 7 1 10 0 1)
SF-TOGGLE "Enable Emboss" TRUE
SF-TOGGLE "Bright Chrome" FALSE
SF-TOGGLE "Stop after emboss" FALSE
)
; end of script