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GIMP Script-Fu Script | 2005-06-30 | 5.8 KB | 179 lines |
- ; 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")
-