;
; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; Mirror layer script  for GIMP 2.4
; Created by Saul Goode
;
; Tags: layer, mirror
;
; Author statement:
;
;
; --------------------------------------------------------------------
; Distributed by Gimp FX Foundry project
; --------------------------------------------------------------------
;   - Changelog -
;
; --------------------------------------------------------------------
;
;    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 (batch-mirror-dup pattern iterations horizontal vertical workcopy)
(let* ((filelist (cadr (file-glob pattern 1))))
  (while (not (null? filelist))
    (let* ((filename (car filelist))
		   (image (car (gimp-file-load RUN-NONINTERACTIVE filename filename)))
		   (layer (car (gimp-image-get-active-layer image))))
		
      (let* (
		(work-image 0)
		(new-layer 0)
		(orig-width 0)
		(orig-height 0)
		)
		(if (= workcopy TRUE)
		  (begin
			(set! work-image (car (gimp-image-duplicate image)))
			(gimp-image-undo-disable work-image)
			(gimp-display-new work-image)
			)
		  (begin
			(set! work-image image)
			(gimp-image-undo-group-start work-image)
			)
		  )
		(gimp-selection-none work-image)
		(while (> iterations 0)
		  (set! layer (car (gimp-image-get-active-layer work-image)))
		  (if (> (car (gimp-image-get-layers work-image)) 1)
			(set! layer (car (gimp-image-merge-visible-layers work-image EXPAND-AS-NECESSARY)))
			)
		  (if (= horizontal TRUE)
			(begin
			  (set! new-layer (car (gimp-layer-copy layer 1)))
			  (gimp-image-add-layer work-image new-layer -1)
			  (set! orig-width (car (gimp-drawable-width new-layer)))
			  (set! orig-height (car (gimp-drawable-height new-layer)))
			  (gimp-layer-resize
				  new-layer
				  (* 2 orig-width)
					  orig-height
					  0
					  0
					  )
			  (set! new-layer (car (gimp-drawable-transform-flip-simple new-layer
				  ORIENTATION-HORIZONTAL
				  TRUE
				  orig-width
				  0))
				)
			  (gimp-image-resize-to-layers work-image)
			  (if (> (car (gimp-image-get-layers work-image)) 1)
				(set! layer (car (gimp-image-merge-visible-layers work-image EXPAND-AS-NECESSARY)))
				)
			  )
			)
		  (if (= vertical TRUE)
			(begin
			  (set! new-layer (car (gimp-layer-copy layer 1)))
			  (gimp-image-add-layer work-image new-layer -1)
			  (set! orig-width (car (gimp-drawable-width new-layer)))
			  (set! orig-height (car (gimp-drawable-height new-layer)))
			  (gimp-layer-resize
				  new-layer
				  orig-width
				  (* 2 orig-height)
				  0
				  0
				  )
			  (set! new-layer (car (gimp-drawable-transform-flip-simple new-layer
				  ORIENTATION-VERTICAL
				  TRUE
				  orig-height
				  0))
				)
			  (gimp-image-resize-to-layers work-image)
			  )
			)
		  (set! iterations (- iterations 1))
		  )
		(gimp-selection-none work-image)
		(if (> (car (gimp-image-get-layers work-image)) 1)
		  (set! layer (car (gimp-image-merge-visible-layers work-image EXPAND-AS-NECESSARY)))
		  )
		(gimp-displays-flush)
		(if (= workcopy TRUE)
		  (begin
			(gimp-image-undo-enable work-image)
			(gimp-image-clean-all work-image)
			)
		  (gimp-image-undo-group-end image)
		  )
	)
	  (gimp-file-save RUN-NONINTERACTIVE image layer filename filename)
	  (gimp-image-delete image))
    (set! filelist (cdr filelist)))))