This file is indexed.

/usr/share/gimp/2.0/scripts/burn-in-anim.scm is in gimp-data 2.8.10-0ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
;
;  burn-in-anim.scm V2.1  -  script-fu for GIMP 1.1 and higher
;
;  Copyright (C) 9/2000  Roland Berger
;  roland@fuchur.leute.server.de
;  http://fuchur.leute.server.de
;
;  Let text appear and fade out with a "burn-in" like SFX.
;  Works on an image with a text and a background layer
;
;  Copying Policy:  GNU Public License http://www.gnu.org
;

(define (script-fu-burn-in-anim org-img
                                org-layer
                                glow-color
                                fadeout
                                bl-width
                                corona-width
                                after-glow
                                show-glow
                                optimize
                                speed)

  (let* (
        ;--- main variable: "bl-x" runs from 0 to layer-width
        (bl-x 0)
        (frame-nr 0)
        (img 0)
        (source-layer 0)
        (bg-source-layer 0)
        (source-layer-width 0)
        (bg-layer 0)
        (bg-layer-name 0)
        (bl-layer 0)
        (bl-layer-name 0)
        (bl-mask 0)
        (bl-layer-width 0)
        (bl-height 0)
        (bl-x-off 0)
        (bl-y-off 0)
        (nofadeout-bl-x-off 0)
        (nofadeout-bl-width 0)
        (blended-layer 0)
        (img-display 0)
        )

    (if (< speed 1)
        (set! speed (* -1 speed)) )

    ;--- check image and work on a copy
    (if (and (= (car (gimp-image-get-layers org-img)) 2)
             (= (car (gimp-image-get-floating-sel org-img)) -1))

        ;--- main program structure starts here, begin of "if-1"
        (begin
          (gimp-context-push)
          (gimp-context-set-defaults)

          (set! img (car (gimp-image-duplicate org-img)))
          (gimp-image-undo-disable img)
          (if (> (car (gimp-drawable-type org-layer)) 1 )
              (gimp-image-convert-rgb img))
          (set! source-layer    (aref (cadr (gimp-image-get-layers img)) 0 ))
          (set! bg-source-layer (aref (cadr (gimp-image-get-layers img)) 1 ))
          (set! source-layer-width (car (gimp-drawable-width  source-layer)))

          ;--- hide layers, cause we want to "merge visible layers" later
          (gimp-item-set-visible source-layer FALSE)
          (gimp-item-set-visible bg-source-layer     FALSE)

          ;--- process image horizontal with pixel-speed
          (while (< bl-x (+ source-layer-width bl-width))
              (set! bl-layer (car (gimp-layer-copy source-layer TRUE)))
              (set! bl-layer-name (string-append "fr-nr"
                                                 (number->string frame-nr 10) ) )

              (gimp-image-insert-layer img bl-layer 0 -2)
              (gimp-item-set-name bl-layer bl-layer-name)
              (gimp-item-set-visible bl-layer TRUE)
              (gimp-layer-set-lock-alpha bl-layer TRUE)
              (gimp-layer-add-alpha bl-layer)

              ;--- add an alpha mask for blending and select it
              (gimp-image-select-item img CHANNEL-OP-REPLACE bl-layer)
              (set! bl-mask (car (gimp-layer-create-mask bl-layer ADD-BLACK-MASK)))
              (gimp-layer-add-mask bl-layer bl-mask)

              ;--- handle layer geometry
              (set! bl-layer-width source-layer-width)
              (set! bl-height      (car (gimp-drawable-height bl-layer)))
              (set! bl-x-off (- bl-x     bl-width))
              (set! bl-x-off (+ bl-x-off (car  (gimp-drawable-offsets bl-layer))))
              (set! bl-y-off             (cadr (gimp-drawable-offsets bl-layer)))

              ;--- select a rectangular area to blend
              (gimp-image-select-rectangle img CHANNEL-OP-REPLACE bl-x-off bl-y-off bl-width bl-height)
              ;--- select at least 1 pixel!
              (gimp-image-select-rectangle img CHANNEL-OP-ADD bl-x-off bl-y-off (+ bl-width 1) bl-height)

              (if (= fadeout FALSE)
                  (begin
                    (set! nofadeout-bl-x-off (car (gimp-drawable-offsets bl-layer)))
                    (set! nofadeout-bl-width (+ nofadeout-bl-x-off bl-x))
                    (set! nofadeout-bl-width (max nofadeout-bl-width 1))
                    (gimp-image-select-rectangle img CHANNEL-OP-REPLACE
                                                 nofadeout-bl-x-off bl-y-off
                                                 nofadeout-bl-width bl-height)
                  )
              )

              ;--- alpha blending text to trans (fadeout)
              (gimp-context-set-foreground '(255 255 255))
              (gimp-context-set-background '(  0   0   0))
              (if (= fadeout TRUE)
                  (begin
                    ; blend with 20% offset to get less transparency in the front
                    (gimp-edit-blend bl-mask FG-BG-RGB-MODE NORMAL-MODE
                                     GRADIENT-LINEAR 100 20 REPEAT-NONE FALSE
                                     FALSE 0 0 TRUE
                                     (+ bl-x-off bl-width) 0 bl-x-off 0)
                  )
              )

              (if (= fadeout FALSE)
                  (begin
                    (gimp-context-set-foreground '(255 255 255))
                    (gimp-edit-bucket-fill bl-mask FG-BUCKET-FILL NORMAL-MODE
                                           100 255 0 0 0)
                  )
              )

              (gimp-layer-remove-mask bl-layer MASK-APPLY)

              ;--- add bright glow in front
              (if (= show-glow TRUE)
                  (begin
                    ;--- add some brightness to whole text
                    (if (= fadeout TRUE)
                        (gimp-brightness-contrast bl-layer 100 0)
                    )

          ;--- blend glow color inside the letters
          (gimp-context-set-foreground glow-color)
          (gimp-edit-blend bl-layer FG-TRANSPARENT-MODE NORMAL-MODE
                   GRADIENT-LINEAR 100 0 REPEAT-NONE FALSE
                   FALSE 0 0 TRUE
                   (+ bl-x-off bl-width) 0
                   (- (+ bl-x-off bl-width) after-glow) 0)

          ;--- add corona effect
          (gimp-image-select-item img CHANNEL-OP-REPLACE bl-layer)
          (gimp-selection-sharpen img)
          (gimp-selection-grow img corona-width)
          (gimp-layer-set-lock-alpha bl-layer FALSE)
          (gimp-selection-feather img corona-width)
          (gimp-context-set-foreground glow-color)
          (gimp-edit-blend bl-layer FG-TRANSPARENT-MODE NORMAL-MODE
                   GRADIENT-LINEAR 100 0 REPEAT-NONE FALSE
                   FALSE 0 0 TRUE
                   (- (+ bl-x-off bl-width) corona-width) 0
                   (- (+ bl-x-off bl-width) after-glow) 0)
                  )
              )

              ;--- merge with bg layer
              (set! bg-layer (car (gimp-layer-copy bg-source-layer FALSE)))
              (gimp-image-insert-layer img bg-layer 0 -1)
              (gimp-image-lower-item img bg-layer)
              (set! bg-layer-name (string-append "bg-"
                                                 (number->string frame-nr 10)))
              (gimp-item-set-name bg-layer bg-layer-name)
              (gimp-item-set-visible bg-layer TRUE)
              (set! blended-layer (car (gimp-image-merge-visible-layers img
                                        CLIP-TO-IMAGE)))
              ;(set! blended-layer bl-layer)
              (gimp-item-set-visible blended-layer FALSE)

              ;--- end of "while" loop
              (set! frame-nr (+ frame-nr 1))
              (set! bl-x     (+ bl-x speed))
          )

          ;--- finalize the job
          (gimp-selection-none img)
          (gimp-image-remove-layer img    source-layer)
          (gimp-image-remove-layer img bg-source-layer)

          (gimp-image-set-filename img "burn-in")

          (if (= optimize TRUE)
              (begin
                (gimp-image-convert-indexed img 1 WEB-PALETTE 250 FALSE TRUE "")
                (set! img-out (car (plug-in-animationoptimize RUN-NONINTERACTIVE
                                                              img
                                                              bl-layer)))
              )
          )

          (gimp-item-set-visible (aref (cadr (gimp-image-get-layers img)) 0)
                                  TRUE)
          (gimp-image-undo-enable img)
          (gimp-image-clean-all img)
          (set! img-display (car (gimp-display-new img)))

          (gimp-displays-flush)

          (gimp-context-pop)
        )

        ;--- false form of "if-1"
        (gimp-message _"The Burn-In script needs two layers in total. A foreground layer with transparency and a background layer.")
    )
  )
)


(script-fu-register "script-fu-burn-in-anim"
    _"B_urn-In..."
    _"Create intermediate layers to produce an animated 'burn-in' transition between two layers"
    "Roland Berger roland@fuchur.leute.server.de"
    "Roland Berger"
    "January 2001"
    "RGBA GRAYA INDEXEDA"
    SF-IMAGE    "The image"            0
    SF-DRAWABLE "Layer to animate"     0
    SF-COLOR   _"Glow color"           "white"
    SF-TOGGLE  _"Fadeout"              FALSE
    SF-VALUE   _"Fadeout width"        "100"
    SF-VALUE   _"Corona width"         "7"
    SF-VALUE   _"After glow"           "50"
    SF-TOGGLE  _"Add glowing"          TRUE
    SF-TOGGLE  _"Prepare for GIF"      FALSE
    SF-VALUE   _"Speed (pixels/frame)" "50"
)

(script-fu-menu-register "script-fu-burn-in-anim"
                         "<Image>/Filters/Animation/Animators")