; FU_color_funky-color.scm
; version 2.8 [gimphelp.org]
; last modified/tested by Paul Sherman
; 02/15/2014 on GIMP-2.8.10
;
; 02/15/2014 - convert to RGB if needed
; 04/26/2020 - convert to work with Gimp 2.10.18
; 23/08/2022 - updates to enable work with Gimp 2.10.32
;==============================================================
;
; 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 
;
; Funky color script  for GIMP 1.2
; Copyright (C) 2001 Iccii <iccii@hotmail.com>
; 
; --------------------------------------------------------------------
; version 0.1  by Iccii 2001/12/03
;     - Initial relase
; version 0.1a by Iccii 2001/12/08
;     - Now only affects to selection area
; version 0.2 by karlhof26 2020/04/26
;     - Changes to allow for working in Gim 2.10.18
;==============================================================

(define (apply-easy-glowing-effect
            img
            img-layer
            blur)
    
  (let* (
         (img-width (car (gimp-drawable-width img-layer)))
         (img-height (car (gimp-drawable-height img-layer)))
         (layer (car (gimp-layer-new img img-width img-height RGBA-IMAGE
                                           "Base Layer" 100 LAYER-MODE-NORMAL)))
         (layer-copy (car (gimp-layer-copy layer TRUE)))
        )
        
        (gimp-image-resize img img-width img-height 0 0)
        (if (equal? (car (gimp-drawable-has-alpha img-layer)) FALSE)
            (gimp-layer-add-alpha img-layer))
        (gimp-image-insert-layer img layer 0 -1)
        (gimp-image-lower-item img layer)
        (gimp-drawable-fill layer FILL-WHITE)
        (set! layer (car (gimp-image-merge-down img img-layer EXPAND-AS-NECESSARY)))
        (set! layer-copy (car (gimp-layer-copy layer TRUE)))
        (gimp-image-insert-layer img layer-copy 0 -1)
        (gimp-layer-set-mode layer-copy LAYER-MODE-OVERLAY)
        (plug-in-gauss-iir2 1 img layer blur blur)
        (plug-in-gauss-iir2 1 img layer-copy (+ (/ blur 2) 1) (+ (/ blur 2) 1))
        (let* (
                (point-num 3)
                (control_pts (cons-array (* point-num 2) 'byte))
              )
            (aset control_pts 0 0.0) ; 0
            (aset control_pts 1 0.0) ; 0
            (aset control_pts 2 0.502) ; 127
            (aset control_pts 3 1.0) ; 255
            (aset control_pts 4 1.0) ; 255
            (aset control_pts 5 0.0) ; 255
            (gimp-drawable-curves-spline layer HISTOGRAM-VALUE (* point-num 2) control_pts)
            (gimp-drawable-curves-spline layer-copy HISTOGRAM-VALUE (* point-num 2) control_pts)
        )
        (plug-in-gauss-iir2 1 img layer (+ (* blur 2) 1) (+ (* blur 2) 1))
        (let* (
                (point-num 4)
                (control_pts (cons-array (* point-num 2) 'byte))
              )
            (aset control_pts 0 0.0) ; 0
            (aset control_pts 1 0.0) ; 0 
            (aset control_pts 2 0.247) ; 63
            (aset control_pts 3 1.0) ; 255
            (aset control_pts 4 0.749) ; 191
            (aset control_pts 5 0.0) ; 0
            (aset control_pts 6 1.0) ; 255
            (aset control_pts 7 1.0) ; 255
            (gimp-drawable-curves-spline layer HISTOGRAM-VALUE (* point-num 2) control_pts)
            (gimp-drawable-curves-spline layer-copy HISTOGRAM-VALUE (* point-num 2) control_pts)
        )
        
        (list layer layer-copy)
  )
)

(define (FU-funky-color
        img
        layer
        blur
    )
    
    (gimp-image-undo-group-start img)
    (if (not (= RGB (car (gimp-image-base-type img))))
                (gimp-image-convert-rgb img)
    ) 
    
    (let* (
            (old-fg (car (gimp-context-get-foreground)))
            (old-bg (car (gimp-context-get-background)))
            (old-layer-name (car (gimp-item-get-name layer)))
            (layer-list (apply-easy-glowing-effect img layer blur))
        )
        
        (gimp-item-set-name (car layer-list) old-layer-name)
        (gimp-item-set-name (cadr layer-list) "Change layer mode")
        (if (equal? (car (gimp-selection-is-empty img)) FALSE)
            (begin
                (gimp-selection-invert img)
                (gimp-edit-clear (cadr layer-list))
                (gimp-selection-invert img)
            )
        )
        (gimp-context-set-foreground old-fg)
        (gimp-context-set-background old-bg)
        (gimp-image-undo-group-end img)
        (gimp-displays-flush)
  )
)

(script-fu-register
    "FU-funky-color"
    "<Toolbox>/Script-Fu/Colors/Funky Color"
    "Create funky color logo image.\nBe sure to check out the MODE in the layers dialog after running the script. Different modes can yield many different results. \n file:FU_color_funky-color.scm"
    "Iccii <iccii@hotmail.com>"
    "karlhof26"
    "2001, 2020"
    "*"
    SF-IMAGE        "Image"         0
    SF-DRAWABLE     "Drawable"      0
    SF-ADJUSTMENT   "Blur Amount"       '(10 1 100 1 1 0 1)
)

; end of script 