mirror of https://github.com/GNOME/gimp.git
198 lines
5.6 KiB
Scheme
198 lines
5.6 KiB
Scheme
; The GIMP -- an image manipulation program
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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 2 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, write to the Free Software
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; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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;
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;
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; drop-shadow.scm version 1.03 06/03/99
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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 gimp-edit-fill until layer is added to image!
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;
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;
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; Copyright (C) 1997 Sven Neumann (neumanns@uni-duesseldorf.de)
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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* ((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 (gimp-drawable-type-with-alpha drawable)))
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(image-width (car (gimp-image-width image)))
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(image-height (car (gimp-image-height image)))
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(old-bg (car (gimp-palette-get-background)))
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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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(gimp-image-disable-undo image)
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(gimp-layer-add-alpha drawable)
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(if (= (car (gimp-selection-is-empty image)) TRUE)
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(begin
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(gimp-selection-layer-alpha 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 (gimp-selection-save image)))))
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(let* ((selection-bounds (gimp-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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(gimp-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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(set! shadow-layer (car (gimp-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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NORMAL)))
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(gimp-image-add-layer image shadow-layer -1)
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(gimp-layer-set-offsets shadow-layer
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shadow-offset-x
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shadow-offset-y))
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(gimp-drawable-fill shadow-layer TRANS-IMAGE-FILL)
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(gimp-palette-set-background shadow-color)
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(gimp-edit-fill shadow-layer)
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(gimp-selection-none image)
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(gimp-layer-set-preserve-trans shadow-layer FALSE)
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(if (> shadow-blur 0) (plug-in-gauss-rle 1
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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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(gimp-layer-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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(gimp-selection-load active-selection)
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(gimp-edit-clear shadow-layer)
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(gimp-image-remove-channel image active-selection)))
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(if (and
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(= (car (gimp-layer-is-floating-sel drawable)) 0)
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(= from-selection FALSE))
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(gimp-image-raise-layer image drawable))
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(gimp-image-set-active-layer image drawable)
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(gimp-palette-set-background old-bg)
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(gimp-image-enable-undo image)
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(gimp-displays-flush)))
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(script-fu-register "script-fu-drop-shadow"
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"<Image>/Script-Fu/Shadow/Drop-Shadow"
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"Add a drop-shadow of the current selection or
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alpha-channel"
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"Sven Neumann (neumanns@uni-duesseldorf.de)"
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"Sven Neumann"
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"12/13/1997"
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"RGB RGBA GRAY GRAYA"
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SF-IMAGE "Image" 0
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SF-DRAWABLE "Drawable" 0
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SF-VALUE "X offset" "8"
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SF-VALUE "Y offset" "8"
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SF-VALUE "Blur Radius" "15"
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SF-COLOR "Color" '(0 0 0)
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SF-VALUE "Opacity" "80"
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SF-TOGGLE "Allow Resizing" TRUE)
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