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; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; Gradient example script --- create an example image of a custom gradient
; 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-gradient-example width
height
gradient-reverse)
(let* ((img (car (gimp-image-new width height RGB)))
(drawable (car (gimp-layer-new img width height RGB
"Gradient example" 100 NORMAL-MODE)))
; Calculate colors for checkerboard... just like in the gradient editor
(fg-color (* 255 (/ 2 3)))
(bg-color (* 255 (/ 1 3))))
(gimp-context-push)
(gimp-image-undo-disable img)
(gimp-image-add-layer img drawable 0)
; Render background checkerboard
(gimp-context-set-foreground (list fg-color fg-color fg-color))
(gimp-context-set-background (list bg-color bg-color bg-color))
(plug-in-checkerboard 1 img drawable 0 8)
; Render gradient
(gimp-edit-blend drawable CUSTOM-MODE NORMAL-MODE
GRADIENT-LINEAR 100 0 REPEAT-NONE gradient-reverse
FALSE 0 0 TRUE
0 0 (- width 1) 0)
; Terminate
(gimp-image-undo-enable img)
(gimp-display-new img)
(gimp-context-pop)))
(script-fu-register "script-fu-gradient-example"
_"Custom _Gradient..."
"Create an example image of a custom gradient"
"Federico Mena Quintero"
"Federico Mena Quintero"
"June 1997"
""
SF-ADJUSTMENT _"Width" '(400 1 2000 1 10 0 1)
SF-ADJUSTMENT _"Height" '(30 1 2000 1 10 0 1)
SF-TOGGLE _"Gradient reverse" FALSE)
(script-fu-menu-register "script-fu-gradient-example"
_"<Toolbox>/Xtns/Script-Fu/Utils")
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