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Diffstat (limited to 'plug-ins/script-fu/scripts/drop-shadow.scm')
| -rw-r--r-- | plug-ins/script-fu/scripts/drop-shadow.scm | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/plug-ins/script-fu/scripts/drop-shadow.scm b/plug-ins/script-fu/scripts/drop-shadow.scm new file mode 100644 index 0000000..c1b243a --- /dev/null +++ b/plug-ins/script-fu/scripts/drop-shadow.scm @@ -0,0 +1,187 @@ +; 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") |