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;
; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; Amazing circles script  for GIMP 2.4
; Copyright (C) 2007 Harry Phillips <script-fu@tux.com.au>
;
; Tags: distoriton, circle
;
; Author statement:
;
; Turn an image into an Amazing Circle.
;
; --------------------------------------------------------------------
; Distributed by Gimp FX Foundry project
; --------------------------------------------------------------------
;   - Changelog -
; Changelog:
;  Version 1.4 (7th August 2007)
;    - Cleaned up the code
;    - Created a mini funtion "square-crop"
;    - Added the cropping multi option
;
;  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
;
;  Version 1.1
;    - Added a check to see if the image is already square
;
; --------------------------------------------------------------------
;
;    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/>.
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


(define (square-crop image)

    (let*
    (
        ;Read the image width and height
    (width (car (gimp-image-width image)))
    (height (car (gimp-image-height image)))

    )

    (if (= width height)
        ()
        (begin

    ;Check which is longer
    (if     (> width height)
        (gimp-image-crop image height height (/ (- width height) 2) 0)
        (gimp-image-crop image width width 0 (/ (- height width) 2))

    ))
)))


(define (script-fu-amazing-circles    theImage
                    theLayer
                    circlePercent
                    cropType
    )

    ;Start an undo group so the process can be undone with one undo
    (gimp-image-undo-group-start theImage)

    ;Select none
    (gimp-selection-none theImage)

    ;Select none
    (gimp-selection-none theImage)

    (if (= cropType 1)
        (square-crop theImage)
        ()
    )

    ;First polar co-ord with "To Polar = off"
    (plug-in-polar-coords 1 theImage theLayer circlePercent 0 1 0 0)

    ;Flip vertically
    (gimp-image-flip theImage 1)

    ;Second polar co-ord with "To Polar = on"
    (plug-in-polar-coords 1 theImage theLayer circlePercent 0 1 0 1)

    (if (= cropType 0)
        (square-crop theImage)
        ()
    )

    ;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 "script-fu-amazing-circles"
            _"Amazing circles..."
            _"Does the amazing circles on a square image"
            "Harry Phillips"
            "Harry Phillips"
            "Mar. 23 2007"
            "*"
            SF-IMAGE        "Image"     0
            SF-DRAWABLE        "Drawable"  0
        SF-ADJUSTMENT    _"Circle depth"      '(100 0 100 1 10 1 0)
        SF-OPTION        _"Crop image?"        '(_"Crop after" _"Crop before" _"Don't crop")
)

(script-fu-menu-register "script-fu-amazing-circles"
                         "<Image>/FX-Foundry/Distorts")