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+; GIMP - The GNU Image Manipulation Program
+; Copyright (C) 1995 Spencer Kimball and Peter Mattis
+;
+; 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 3 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, see <https://www.gnu.org/licenses/>.
+;
+;
+; drop-shadow.scm version 1.05 2011/4/21
+;
+; CHANGE-LOG:
+; 1.00 - initial release
+; 1.01 - fixed the problem with a remaining copy of the selection
+; 1.02 - some code cleanup, no real changes
+; 1.03 - can't call gimp-drawable-edit-fill until layer is added to image!
+; 1.04
+; 1.05 - replaced deprecated function calls with new ones for 2.8
+;
+; Copyright (C) 1997-1999 Sven Neumann <sven@gimp.org>
+;
+;
+; Adds a drop-shadow of the current selection or alpha-channel.
+;
+; This script is derived from my script add-shadow, which has become
+; obsolete now. Thanks to Andrew Donkin (ard@cs.waikato.ac.nz) for his
+; idea to add alpha-support to add-shadow.
+
+
+(define (script-fu-drop-shadow image
+ drawable
+ shadow-transl-x
+ shadow-transl-y
+ shadow-blur
+ shadow-color
+ shadow-opacity
+ allow-resize)
+ (let* (
+ (shadow-blur (max shadow-blur 0))
+ (shadow-opacity (min shadow-opacity 100))
+ (shadow-opacity (max shadow-opacity 0))
+ (type (car (gimp-drawable-type-with-alpha drawable)))
+ (image-width (car (gimp-image-width image)))
+ (image-height (car (gimp-image-height image)))
+ (from-selection 0)
+ (active-selection 0)
+ (shadow-layer 0)
+ )
+
+ (gimp-context-push)
+ (gimp-context-set-defaults)
+
+ (gimp-image-set-active-layer image drawable)
+
+ (gimp-image-undo-group-start image)
+
+ (gimp-layer-add-alpha drawable)
+ (if (= (car (gimp-selection-is-empty image)) TRUE)
+ (begin
+ (gimp-image-select-item image CHANNEL-OP-REPLACE drawable)
+ (set! from-selection FALSE))
+ (begin
+ (set! from-selection TRUE)
+ (set! active-selection (car (gimp-selection-save image)))))
+
+ (let* ((selection-bounds (gimp-selection-bounds image))
+ (select-offset-x (cadr selection-bounds))
+ (select-offset-y (caddr selection-bounds))
+ (select-width (- (cadr (cddr selection-bounds)) select-offset-x))
+ (select-height (- (caddr (cddr selection-bounds)) select-offset-y))
+
+ (shadow-width (+ select-width (* 2 shadow-blur)))
+ (shadow-height (+ select-height (* 2 shadow-blur)))
+
+ (shadow-offset-x (- select-offset-x shadow-blur))
+ (shadow-offset-y (- select-offset-y shadow-blur)))
+
+ (if (= allow-resize TRUE)
+ (let* ((new-image-width image-width)
+ (new-image-height image-height)
+ (image-offset-x 0)
+ (image-offset-y 0))
+
+ (if (< (+ shadow-offset-x shadow-transl-x) 0)
+ (begin
+ (set! image-offset-x (- 0 (+ shadow-offset-x
+ shadow-transl-x)))
+ (set! shadow-offset-x (- 0 shadow-transl-x))
+ (set! new-image-width (+ new-image-width image-offset-x))))
+
+ (if (< (+ shadow-offset-y shadow-transl-y) 0)
+ (begin
+ (set! image-offset-y (- 0 (+ shadow-offset-y
+ shadow-transl-y)))
+ (set! shadow-offset-y (- 0 shadow-transl-y))
+ (set! new-image-height (+ new-image-height image-offset-y))))
+
+ (if (> (+ (+ shadow-width shadow-offset-x) shadow-transl-x)
+ new-image-width)
+ (set! new-image-width
+ (+ (+ shadow-width shadow-offset-x) shadow-transl-x)))
+
+ (if (> (+ (+ shadow-height shadow-offset-y) shadow-transl-y)
+ new-image-height)
+ (set! new-image-height
+ (+ (+ shadow-height shadow-offset-y) shadow-transl-y)))
+
+ (gimp-image-resize image
+ new-image-width
+ new-image-height
+ image-offset-x
+ image-offset-y)
+ )
+ )
+
+ (set! shadow-layer (car (gimp-layer-new image
+ shadow-width
+ shadow-height
+ type
+ "Drop Shadow"
+ shadow-opacity
+ LAYER-MODE-NORMAL)))
+ (gimp-image-set-active-layer image drawable)
+ (gimp-image-insert-layer image shadow-layer 0 -1)
+ (gimp-layer-set-offsets shadow-layer
+ shadow-offset-x
+ shadow-offset-y))
+
+ (gimp-drawable-fill shadow-layer FILL-TRANSPARENT)
+ (gimp-context-set-background shadow-color)
+ (gimp-drawable-edit-fill shadow-layer FILL-BACKGROUND)
+ (gimp-selection-none image)
+ (gimp-layer-set-lock-alpha shadow-layer FALSE)
+ (if (>= shadow-blur 1.0) (plug-in-gauss-rle RUN-NONINTERACTIVE
+ image
+ shadow-layer
+ shadow-blur
+ TRUE
+ TRUE))
+ (gimp-item-transform-translate shadow-layer shadow-transl-x shadow-transl-y)
+
+ (if (= from-selection TRUE)
+ (begin
+ (gimp-image-select-item image CHANNEL-OP-REPLACE active-selection)
+ (gimp-drawable-edit-clear shadow-layer)
+ (gimp-image-remove-channel image active-selection)))
+
+ (if (and
+ (= (car (gimp-layer-is-floating-sel drawable)) 0)
+ (= from-selection FALSE))
+ (gimp-image-raise-item image drawable))
+
+ (gimp-image-set-active-layer image drawable)
+ (gimp-image-undo-group-end image)
+ (gimp-displays-flush)
+
+ (gimp-context-pop)
+ )
+)
+
+(script-fu-register "script-fu-drop-shadow"
+ _"_Drop Shadow (legacy)..."
+ _"Add a drop shadow to the selected region (or alpha)"
+ "Sven Neumann <sven@gimp.org>"
+ "Sven Neumann"
+ "1999/12/21"
+ "RGB* GRAY*"
+ SF-IMAGE "Image" 0
+ SF-DRAWABLE "Drawable" 0
+ SF-ADJUSTMENT _"Offset X" '(4 -4096 4096 1 10 0 1)
+ SF-ADJUSTMENT _"Offset Y" '(4 -4096 4096 1 10 0 1)
+ SF-ADJUSTMENT _"Blur radius" '(15 0 1024 1 10 0 1)
+ SF-COLOR _"Color" "black"
+ SF-ADJUSTMENT _"Opacity" '(60 0 100 1 10 0 0)
+ SF-TOGGLE _"Allow resizing" TRUE
+)
+
+(script-fu-menu-register "script-fu-drop-shadow"
+ "<Image>/Filters/Light and Shadow/Shadow")