1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
; 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")
|
