188 lines
7.1 KiB
Scheme
188 lines
7.1 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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; 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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; drop-shadow.scm version 1.05 2011/4/21
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;
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; CHANGE-LOG:
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; 1.00 - initial release
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; 1.01 - fixed the problem with a remaining copy of the selection
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; 1.02 - some code cleanup, no real changes
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; 1.03 - can't call pika-drawable-edit-fill until layer is added to image!
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; 1.04
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; 1.05 - replaced deprecated function calls with new ones for 2.8
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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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; Adds a drop-shadow of the current selection or alpha-channel.
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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. Thanks to Andrew Donkin (ard@cs.waikato.ac.nz) for his
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; idea to add alpha-support to add-shadow.
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(define (script-fu-drop-shadow image
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drawable
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shadow-transl-x
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shadow-transl-y
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shadow-blur
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shadow-color
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shadow-opacity
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allow-resize)
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(let* (
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(shadow-blur (max shadow-blur 0))
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(shadow-opacity (min shadow-opacity 100))
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(shadow-opacity (max shadow-opacity 0))
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(type (car (pika-drawable-type-with-alpha drawable)))
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(image-width (car (pika-image-get-width image)))
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(image-height (car (pika-image-get-height image)))
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(from-selection 0)
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(active-selection 0)
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(shadow-layer 0)
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)
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(pika-context-push)
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(pika-context-set-defaults)
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(pika-image-set-selected-layers image 1 (make-vector 1 drawable))
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(pika-image-undo-group-start image)
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(pika-layer-add-alpha drawable)
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(if (= (car (pika-selection-is-empty image)) TRUE)
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(begin
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(pika-image-select-item image CHANNEL-OP-REPLACE drawable)
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(set! from-selection FALSE))
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(begin
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(set! from-selection TRUE)
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(set! active-selection (car (pika-selection-save image)))))
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(let* ((selection-bounds (pika-selection-bounds image))
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(select-offset-x (cadr selection-bounds))
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(select-offset-y (caddr selection-bounds))
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(select-width (- (cadr (cddr selection-bounds)) select-offset-x))
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(select-height (- (caddr (cddr selection-bounds)) select-offset-y))
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(shadow-width (+ select-width (* 2 shadow-blur)))
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(shadow-height (+ select-height (* 2 shadow-blur)))
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(shadow-offset-x (- select-offset-x shadow-blur))
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(shadow-offset-y (- select-offset-y shadow-blur)))
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(if (= allow-resize TRUE)
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(let* ((new-image-width image-width)
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(new-image-height image-height)
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(image-offset-x 0)
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(image-offset-y 0))
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(if (< (+ shadow-offset-x shadow-transl-x) 0)
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(begin
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(set! image-offset-x (- 0 (+ shadow-offset-x
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shadow-transl-x)))
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(set! shadow-offset-x (- 0 shadow-transl-x))
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(set! new-image-width (+ new-image-width image-offset-x))))
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(if (< (+ shadow-offset-y shadow-transl-y) 0)
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(begin
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(set! image-offset-y (- 0 (+ shadow-offset-y
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shadow-transl-y)))
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(set! shadow-offset-y (- 0 shadow-transl-y))
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(set! new-image-height (+ new-image-height image-offset-y))))
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(if (> (+ (+ shadow-width shadow-offset-x) shadow-transl-x)
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new-image-width)
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(set! new-image-width
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(+ (+ shadow-width shadow-offset-x) shadow-transl-x)))
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(if (> (+ (+ shadow-height shadow-offset-y) shadow-transl-y)
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new-image-height)
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(set! new-image-height
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(+ (+ shadow-height shadow-offset-y) shadow-transl-y)))
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(pika-image-resize image
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new-image-width
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new-image-height
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image-offset-x
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image-offset-y)
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)
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)
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(set! shadow-layer (car (pika-layer-new image
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shadow-width
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shadow-height
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type
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"Drop Shadow"
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shadow-opacity
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LAYER-MODE-NORMAL)))
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(pika-image-set-selected-layers image 1 (make-vector 1 drawable))
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(pika-image-insert-layer image shadow-layer 0 -1)
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(pika-layer-set-offsets shadow-layer
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shadow-offset-x
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shadow-offset-y))
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(pika-drawable-fill shadow-layer FILL-TRANSPARENT)
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(pika-context-set-background shadow-color)
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(pika-drawable-edit-fill shadow-layer FILL-BACKGROUND)
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(pika-selection-none image)
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(pika-layer-set-lock-alpha shadow-layer FALSE)
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(if (>= shadow-blur 1.0) (plug-in-gauss-rle RUN-NONINTERACTIVE
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image
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shadow-layer
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shadow-blur
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TRUE
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TRUE))
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(pika-item-transform-translate shadow-layer shadow-transl-x shadow-transl-y)
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(if (= from-selection TRUE)
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(begin
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(pika-image-select-item image CHANNEL-OP-REPLACE active-selection)
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(pika-drawable-edit-clear shadow-layer)
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(pika-image-remove-channel image active-selection)))
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(if (and
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(= (car (pika-layer-is-floating-sel drawable)) 0)
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(= from-selection FALSE))
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(pika-image-raise-item image drawable))
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(pika-image-set-selected-layers image 1 (make-vector 1 drawable))
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(pika-image-undo-group-end image)
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(pika-displays-flush)
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(pika-context-pop)
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)
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)
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(script-fu-register "script-fu-drop-shadow"
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_"_Drop Shadow (legacy)..."
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_"Add a drop shadow to the selected region (or alpha)"
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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 _"Offset X" '(4 -4096 4096 1 10 0 1)
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SF-ADJUSTMENT _"Offset Y" '(4 -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-COLOR _"Color" "black"
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SF-ADJUSTMENT _"Opacity" '(60 0 100 1 10 0 0)
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SF-TOGGLE _"Allow resizing" TRUE
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)
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(script-fu-menu-register "script-fu-drop-shadow"
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"<Image>/Filters/Light and Shadow/[Shadow]")
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