mirror of https://github.com/GNOME/gimp.git
72 lines
2.5 KiB
Scheme
72 lines
2.5 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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; Gradient example script --- create an example image of a custom gradient
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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-gradient-example width
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height
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gradient-reverse)
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(let* ((img (car (gimp-image-new width height RGB)))
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(drawable (car (gimp-layer-new img width height RGB
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"Gradient example" 100 NORMAL-MODE)))
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; Save old foreground and background colors
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(old-fg-color (car (gimp-palette-get-foreground)))
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(old-bg-color (car (gimp-palette-get-background)))
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; Calculate colors for checkerboard... just like in the gradient editor
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(fg-color (* 255 (/ 2 3)))
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(bg-color (* 255 (/ 1 3))))
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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 background checkerboard
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(gimp-palette-set-foreground (list fg-color fg-color fg-color))
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(gimp-palette-set-background (list bg-color bg-color bg-color))
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(plug-in-checkerboard 1 img drawable 0 8)
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; Render gradient
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(gimp-edit-blend drawable CUSTOM-MODE NORMAL-MODE
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GRADIENT-LINEAR 100 0 REPEAT-NONE gradient-reverse
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FALSE 0 0 TRUE
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0 0 (- width 1) 0)
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; Terminate
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(gimp-palette-set-foreground old-fg-color)
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(gimp-palette-set-background old-bg-color)
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(gimp-image-undo-enable img)
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(gimp-display-new img)))
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(script-fu-register "script-fu-gradient-example"
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_"<Toolbox>/Xtns/Script-Fu/Utils/Custom _Gradient..."
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"Create an example image of a custom gradient"
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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 _"Width" '(400 1 2000 1 10 0 1)
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SF-ADJUSTMENT _"Height" '(30 1 2000 1 10 0 1)
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SF-TOGGLE _"Gradient reverse" FALSE)
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