150 lines
5.5 KiB
Scheme
150 lines
5.5 KiB
Scheme
; 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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; 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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;
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;
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; round-corners.scm version 1.02 1999/12/21
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;
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; CHANGE-LOG:
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; 1.00 - initial release
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; 1.01 - some code cleanup, no real changes
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;
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; Copyright (C) 1997-1999 Sven Neumann <sven@gimp.org>
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;
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;
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; Rounds the corners of an image, optionally adding a drop-shadow and
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; a background layer
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;
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; The script works on RGB and grayscale images that contain only
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; one layer. It creates a copy of the image or can optionally work
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; on the original. The script uses the current background color to
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; create a background layer. It makes a call to the script drop-shadow.
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;
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; This script is derived from my script add-shadow, which has become
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; obsolete now.
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(define (script-fu-round-corners img
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drawable
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radius
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shadow-toggle
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shadow-x
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shadow-y
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shadow-blur
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background-toggle
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work-on-copy)
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(let* ((shadow-blur (abs shadow-blur))
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(radius (abs radius))
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(diam (* 2 radius))
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(width (car (pika-image-get-width img)))
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(height (car (pika-image-get-height img)))
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(image (cond ((= work-on-copy TRUE)
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(car (pika-image-duplicate img)))
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((= work-on-copy FALSE)
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img)))
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; active drawable is not necessarily the active layer
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(pic-layer (aref (cadr (pika-image-get-selected-layers image)) 0))
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(type (car (pika-drawable-type-with-alpha pic-layer)))
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)
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(pika-context-push)
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(pika-context-set-defaults)
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(if (= work-on-copy TRUE)
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(pika-image-undo-disable image)
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(pika-image-undo-group-start image)
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)
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; add an alpha channel to the image
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(pika-layer-add-alpha pic-layer)
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; round the edges
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(pika-selection-none image)
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(pika-image-select-rectangle image CHANNEL-OP-ADD 0 0 radius radius)
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(pika-image-select-ellipse image CHANNEL-OP-SUBTRACT 0 0 diam diam)
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(pika-image-select-rectangle image CHANNEL-OP-ADD (- width radius) 0 radius radius)
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(pika-image-select-ellipse image CHANNEL-OP-SUBTRACT (- width diam) 0 diam diam)
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(pika-image-select-rectangle image CHANNEL-OP-ADD 0 (- height radius) radius radius)
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(pika-image-select-ellipse image CHANNEL-OP-SUBTRACT 0 (- height diam) diam diam)
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(pika-image-select-rectangle image CHANNEL-OP-ADD (- width radius) (- height radius)
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radius radius)
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(pika-image-select-ellipse image CHANNEL-OP-SUBTRACT (- width diam) (- height diam)
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diam diam)
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(pika-drawable-edit-clear pic-layer)
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(pika-selection-none image)
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; optionally add a shadow
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(if (= shadow-toggle TRUE)
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(begin
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(script-fu-drop-shadow image
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pic-layer
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shadow-x
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shadow-y
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shadow-blur
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'(0 0 0)
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80
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TRUE)
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(set! width (car (pika-image-get-width image)))
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(set! height (car (pika-image-get-height image)))))
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; optionally add a background
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(if (= background-toggle TRUE)
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(let* ((bg-layer (car (pika-layer-new image
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width
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height
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type
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"Background"
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100
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LAYER-MODE-NORMAL))))
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(pika-drawable-fill bg-layer FILL-BACKGROUND)
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(pika-image-insert-layer image bg-layer 0 -1)
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(pika-image-raise-item image pic-layer)
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(if (= shadow-toggle TRUE)
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(pika-image-lower-item image bg-layer))))
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; clean up after the script
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(if (= work-on-copy TRUE)
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(pika-image-undo-enable image)
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(pika-image-undo-group-end image)
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)
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(if (= work-on-copy TRUE)
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(pika-display-new image))
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(pika-context-pop)
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(pika-displays-flush))
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)
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(script-fu-register "script-fu-round-corners"
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_"_Round Corners..."
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_"Round the corners of an image and optionally add a drop-shadow and background"
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"Sven Neumann <sven@gimp.org>"
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"Sven Neumann"
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"1999/12/21"
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"RGB* GRAY*"
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SF-IMAGE "Image" 0
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SF-DRAWABLE "Drawable" 0
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SF-ADJUSTMENT _"Edge radius" '(15 0 4096 1 10 0 1)
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SF-TOGGLE _"Add drop-shadow" TRUE
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SF-ADJUSTMENT _"Shadow X offset" '(8 -4096 4096 1 10 0 1)
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SF-ADJUSTMENT _"Shadow Y offset" '(8 -4096 4096 1 10 0 1)
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SF-ADJUSTMENT _"Blur radius" '(15 0 1024 1 10 0 1)
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SF-TOGGLE _"Add background" TRUE
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SF-TOGGLE _"Work on copy" TRUE
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)
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(script-fu-menu-register "script-fu-round-corners"
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"<Image>/Filters/Decor")
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