1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
; 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
drawables
shadow-transl-x
shadow-transl-y
shadow-blur
shadow-color
shadow-opacity
allow-resize)
(let* (
(drawable (vector-ref drawables 0))
(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-get-width image)))
(image-height (car (gimp-image-get-height image)))
(from-selection 0)
(active-selection 0)
(shadow-layer 0)
)
(gimp-context-push)
(gimp-context-set-defaults)
(gimp-image-set-selected-layers image (make-vector 1 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
"Drop Shadow"
shadow-width
shadow-height
type
shadow-opacity
LAYER-MODE-NORMAL)))
(gimp-image-set-selected-layers image (make-vector 1 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)
(gimp-drawable-merge-new-filter shadow-layer "gegl:gaussian-blur" 0 LAYER-MODE-REPLACE 1.0 "std-dev-x" (* 0.32 shadow-blur)
"std-dev-y" (* 0.32 shadow-blur)
"filter" "auto")
)
(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-selected-layers image (make-vector 1 drawable))
(gimp-image-undo-group-end image)
(gimp-displays-flush)
(gimp-context-pop)
)
)
(script-fu-register-filter "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-ONE-OR-MORE-DRAWABLE
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]")
|
