82 lines
2.6 KiB
Scheme
82 lines
2.6 KiB
Scheme
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; PIKA - Photo and Image Kooker Application
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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 3 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, see <https://www.gnu.org/licenses/>.
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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* (
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(img (car (pika-image-new width height RGB)))
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(drawable (car (pika-layer-new img width height RGB
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"Gradient example" 100 LAYER-MODE-NORMAL)))
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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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)
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(pika-image-undo-disable img)
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(pika-image-insert-layer img drawable 0 0)
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; Render background checkerboard
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(pika-context-push)
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(pika-context-set-foreground (list fg-color fg-color fg-color))
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(pika-context-set-background (list bg-color bg-color bg-color))
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(plug-in-checkerboard RUN-NONINTERACTIVE img 1 (vector drawable) 0 8)
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(pika-context-pop)
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; Render gradient
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(pika-context-push)
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(pika-context-set-gradient-reverse gradient-reverse)
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(pika-drawable-edit-gradient-fill drawable
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GRADIENT-LINEAR 0
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FALSE 0 0
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TRUE
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0 0 (- width 1) 0)
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(pika-context-pop)
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; Terminate
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(pika-image-undo-enable img)
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(pika-display-new img)
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)
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)
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(script-fu-register "script-fu-gradient-example"
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_"Custom _Gradient..."
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_"Create an image filled with an example of the current 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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)
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(script-fu-menu-register "script-fu-gradient-example"
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"<Gradients>")
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