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; The GIMP -- an 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 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.
;
;
; drop-shadow.scm version 1.04 1999/12/21
;
; 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-edit-fill until layer is added to image!
;
;
; 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-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-selection-layer-alpha 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
NORMAL-MODE)))
(gimp-image-add-layer image shadow-layer -1)
(gimp-layer-set-offsets shadow-layer
shadow-offset-x
shadow-offset-y))
(gimp-drawable-fill shadow-layer TRANSPARENT-FILL)
(gimp-context-set-background shadow-color)
(gimp-edit-fill shadow-layer BACKGROUND-FILL)
(gimp-selection-none image)
(gimp-layer-set-preserve-trans shadow-layer FALSE)
(if (>= shadow-blur 1.0) (plug-in-gauss-rle 1
image
shadow-layer
shadow-blur
TRUE
TRUE))
(gimp-layer-translate shadow-layer shadow-transl-x shadow-transl-y)
(if (= from-selection TRUE)
(begin
(gimp-selection-load active-selection)
(gimp-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-layer 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..."
"Add a drop-shadow of the current selection or alpha-channel"
"Sven Neumann <sven@gimp.org>"
"Sven Neumann"
"1999/12/21"
"RGB* GRAY*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT _"Offset X" '(8 -4096 4096 1 10 0 1)
SF-ADJUSTMENT _"Offset Y" '(8 -4096 4096 1 10 0 1)
SF-ADJUSTMENT _"Blur radius" '(15 0 1024 1 10 0 1)
SF-COLOR _"Color" '(0 0 0)
SF-ADJUSTMENT _"Opacity" '(80 0 100 1 10 0 0)
SF-TOGGLE _"Allow resizing" TRUE)
(script-fu-menu-register "script-fu-drop-shadow"
_"<Image>/Script-Fu/Shadow")
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