; 210_sharpness-softer_orton.scm
; last modified/tested by Paul Sherman [gimphelp.org]
; Wednesday, 07/15/2020 on GIMP 2.10.20
;==================================================
;
; Installation:
; This script should be placed in the user or system-wide script folder.
;
;	Windows 7/10
;	C:\Program Files\GIMP 2\share\gimp\2.0\scripts
;	or
;	C:\Users\YOUR-NAME\AppData\Roaming\GIMP\2.10\scripts
;	
;    
;	Linux
;	/home/yourname/.config/GIMP/2.10/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 
; 
; Simulates the Orton effect on your image.
; Last changed: 5 August 2007
; Copyright (C) 2007 Harry Phillips <script-fu@tux.com.au>
;  
; Changelog:
;  Version 1.3 (5th August 2007)
;    - Added GPL3 licence 
;    - Menu location at the top of the script
;    - Removed the "script-fu-menu-register" section
; 
;  Version 1.2
;    - Made the script compatible with GIMP 2.3
;==============================================================
(define (210-orton-effect
		theImage
		theLayer
		blurAmount
		20on
		opacityLevel
	)
    ;Start an undo group so the process can be undone with one undo
    (gimp-image-undo-group-start theImage)
	(define indexed (car (gimp-drawable-is-indexed theLayer)))
	(if (= indexed TRUE)(gimp-image-convert-rgb theImage))
    ;Select none
    (gimp-selection-none theImage)
    ;Initiate some variables
    (let* 
    (
	(sharp (car (gimp-layer-copy theLayer 0)))
	(sharp-screen (car (gimp-layer-copy theLayer 0)))
	(imageWidth)
	(imageHeight)
	(merged)
	(sharpCopy)
    )
    ;Read the image width and height
    (set! imageWidth (car (gimp-image-width theImage)))
    (set! imageHeight (car (gimp-image-height theImage)))
    ;Add the first layer to the image
    (gimp-image-insert-layer theImage sharp 0 0)
    ;Rename the layer
    (gimp-item-set-name sharp "Sharp")
    ;Add the second layer to the image
    (gimp-image-insert-layer theImage sharp-screen 0 0)
    ;Change the mode of the second layer
    (gimp-layer-set-mode sharp-screen 4)
    ;Merge the top layer down and keep track of the newly merged layer
    (set! merged (car (gimp-image-merge-down theImage sharp-screen 0)))
    ;Copy the merged layer
    (set! sharpCopy (car (gimp-layer-copy merged 0)))
    ;Add the copy of the merged layer
    (gimp-image-insert-layer theImage sharpCopy 0 0)
    ;Rename the copied layer
    (gimp-item-set-name sharpCopy "Out of focus")
    ;Setblur factor to 20% of the longest side
    (if (= 20on TRUE)
	(begin
		(if (> imageHeight imageWidth) (set! blurAmount (/ imageWidth 5)) (set! blurAmount (/ imageHeight 5))
		)
	)
    )
    ;Apply the blur with the supplied blur amount
    (plug-in-gauss 1 theImage sharpCopy blurAmount blurAmount 0)
    ;Change the mode of the sharpCopy
    (gimp-layer-set-mode sharpCopy 3)
    ;Change the sharpCopy layers opacity
    (gimp-layer-set-opacity sharpCopy opacityLevel)
    ;Finish the undo group for the process
    (gimp-image-undo-group-end theImage)
    ;Ensure the updated image is displayed now
    (gimp-displays-flush)
    )
)
(script-fu-register "210-orton-effect"
	"Orton effect"
	"Gives the Orton effect on a photo"
	"Harry Phillips"
	"Harry Phillips"
	"Feb. 07 2006"
	"*"
	SF-IMAGE		"Image"     	0
	SF-DRAWABLE		"Drawable"  	0
	SF-ADJUSTMENT	"Blur"         	'(100 5 10000 1 10 0 1)
	SF-TOGGLE		"Use 20% of the shortest side for Blur"       FALSE
	SF-ADJUSTMENT	"Opacity"      	'(90 0 100 1 10 1 0)
)
(script-fu-menu-register "210-orton-effect" "<Image>/Script-Fu/Sharpness/Softer")