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- ; The GIMP -- an image manipulation program
- ; Copyright (C) 1995 Spencer Kimball and Peter Mattis
- ;
- ; Pattern00 --- create a swirly tileable pattern
- ; Copyright (C) 1997 Federico Mena Quintero
- ; federico@nuclecu.unam.mx
- ;
- ; 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 2 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, write to the Free Software
- ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
- (define (script-fu-swirly-pattern qsize angle times)
- (define (whirl-it img drawable angle times)
- (if (> times 0)
- (begin
- (plug-in-whirl-pinch 1 img drawable angle 0.0 1.0)
- (whirl-it img drawable angle (- times 1)))))
-
- (let* ((hsize (* qsize 2))
- (img-size (* qsize 4))
- (img (car (gimp-image-new img-size img-size RGB)))
- (drawable (car (gimp-layer-new img img-size img-size
- RGB-IMAGE "Swirly pattern"
- 100 NORMAL-MODE))))
-
- (gimp-context-push)
-
- (gimp-image-undo-disable img)
- (gimp-image-add-layer img drawable 0)
-
- ; Render checkerboard
-
- (gimp-context-set-foreground '(0 0 0))
- (gimp-context-set-background '(255 255 255))
-
- (plug-in-checkerboard 1 img drawable 0 qsize)
-
- ; Whirl upper left
-
- (gimp-rect-select img 0 0 hsize hsize CHANNEL-OP-REPLACE 0 0)
- (whirl-it img drawable angle times)
- (gimp-invert drawable)
-
- ; Whirl upper right
-
- (gimp-rect-select img hsize 0 hsize hsize CHANNEL-OP-REPLACE 0 0)
- (whirl-it img drawable (- angle) times)
-
- ; Whirl lower left
-
- (gimp-rect-select img 0 hsize hsize hsize CHANNEL-OP-REPLACE 0 0)
- (whirl-it img drawable (- angle) times)
-
- ; Whirl lower right
-
- (gimp-rect-select img hsize hsize hsize hsize CHANNEL-OP-REPLACE 0 0)
- (whirl-it img drawable angle times)
- (gimp-invert drawable)
-
- ; Terminate
-
- (gimp-selection-none img)
- (gimp-image-undo-enable img)
- (gimp-display-new img)
-
- (gimp-context-pop)))
-
- (script-fu-register "script-fu-swirly-pattern"
- _"_Swirly..."
- "Create a swirly pattern"
- "Federico Mena Quintero"
- "Federico Mena Quintero"
- "June 1997"
- ""
- SF-ADJUSTMENT _"Quarter size" '(20 0 2048 1 10 0 1)
- SF-ADJUSTMENT _"Whirl angle" '(90 0 360 1 1 0 0)
- SF-ADJUSTMENT _"Number of times to whirl" '(4 0 128 1 1 0 1))
-
- (script-fu-menu-register "script-fu-swirly-pattern"
- _"<Toolbox>/Xtns/Script-Fu/Patterns")
-