mirror of https://github.com/GNOME/gimp.git
92 lines
2.8 KiB
Scheme
92 lines
2.8 KiB
Scheme
; The GIMP -- an image manipulation program
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; Copyright (C) 1995 Spencer Kimball and Peter Mattis
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;
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; Pattern00 --- create a swirly tileable pattern
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; Copyright (C) 1997 Federico Mena Quintero
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; federico@nuclecu.unam.mx
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;
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; This program is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 2 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; if not, write to the Free Software
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; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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(define (script-fu-swirly-pattern qsize angle times)
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(define (whirl-it img drawable angle times)
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(if (> times 0)
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(begin
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(plug-in-whirl-pinch 1 img drawable angle 0.0 1.0)
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(whirl-it img drawable angle (- times 1)))))
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(let* ((hsize (* qsize 2))
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(img-size (* qsize 4))
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(img (car (gimp-image-new img-size img-size RGB)))
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(drawable (car (gimp-layer-new img img-size img-size
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RGB-IMAGE "Swirly pattern"
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100 NORMAL-MODE))))
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(gimp-context-push)
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(gimp-image-undo-disable img)
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(gimp-image-add-layer img drawable 0)
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; Render checkerboard
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(gimp-context-set-foreground '(0 0 0))
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(gimp-context-set-background '(255 255 255))
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(plug-in-checkerboard 1 img drawable 0 qsize)
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; Whirl upper left
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(gimp-rect-select img 0 0 hsize hsize CHANNEL-OP-REPLACE 0 0)
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(whirl-it img drawable angle times)
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(gimp-invert drawable)
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; Whirl upper right
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(gimp-rect-select img hsize 0 hsize hsize CHANNEL-OP-REPLACE 0 0)
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(whirl-it img drawable (- angle) times)
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; Whirl lower left
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(gimp-rect-select img 0 hsize hsize hsize CHANNEL-OP-REPLACE 0 0)
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(whirl-it img drawable (- angle) times)
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; Whirl lower right
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(gimp-rect-select img hsize hsize hsize hsize CHANNEL-OP-REPLACE 0 0)
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(whirl-it img drawable angle times)
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(gimp-invert drawable)
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; Terminate
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(gimp-selection-none img)
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(gimp-image-undo-enable img)
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(gimp-display-new img)
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(gimp-context-pop)))
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(script-fu-register "script-fu-swirly-pattern"
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_"_Swirly..."
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"Create a swirly pattern"
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"Federico Mena Quintero"
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"Federico Mena Quintero"
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"June 1997"
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""
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SF-ADJUSTMENT _"Quarter size" '(20 0 2048 1 10 0 1)
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SF-ADJUSTMENT _"Whirl angle" '(90 0 360 1 1 0 0)
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SF-ADJUSTMENT _"Number of times to whirl" '(4 0 128 1 1 0 1))
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(script-fu-menu-register "script-fu-swirly-pattern"
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"<Toolbox>/Xtns/Script-Fu/Patterns")
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