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/usr/share/gimp/2.0/scripts/basic2-logo.scm is in gimp-data 2.8.16-1ubuntu1.

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;  HIGHLIGHT-DROP-SHADOW-LOGO
;  draw the specified text over a background with a drop shadow and a highlight

(define (apply-basic2-logo-effect img
                                  logo-layer
                                  bg-color
                                  text-color)

  (define (color-highlight color)
    (let (
         (r (car color))
         (g (cadr color))
         (b (caddr color))
         )

      (set! r (+ r (* (- 255 r) 0.75)))
      (set! g (+ g (* (- 255 g) 0.75)))
      (set! b (+ b (* (- 255 b) 0.75)))
      (list r g b)
    )
  )

  (let* (
        (width (car (gimp-drawable-width logo-layer)))
        (height (car (gimp-drawable-height logo-layer)))
        (posx (- (car (gimp-drawable-offsets logo-layer))))
        (posy (- (cadr (gimp-drawable-offsets logo-layer))))
        (bg-layer (car (gimp-layer-new img width height RGB-IMAGE "Background" 100 NORMAL-MODE)))
        (highlight-layer (car (gimp-layer-copy logo-layer TRUE)))
        (shadow-layer (car (gimp-layer-new img width height RGBA-IMAGE "Shadow" 100 MULTIPLY-MODE)))
        )

    (gimp-context-push)
    (gimp-context-set-defaults)

    (gimp-selection-none img)
    (script-fu-util-image-resize-from-layer img logo-layer)
    (script-fu-util-image-add-layers img highlight-layer shadow-layer bg-layer)
    (gimp-context-set-foreground text-color)
    (gimp-layer-set-lock-alpha logo-layer TRUE)
    (gimp-edit-fill logo-layer FOREGROUND-FILL)
    (gimp-edit-clear shadow-layer)
    (gimp-context-set-foreground (color-highlight text-color))
    (gimp-layer-set-lock-alpha highlight-layer TRUE)
    (gimp-edit-fill highlight-layer FOREGROUND-FILL)
    (gimp-context-set-background bg-color)
    (gimp-drawable-fill bg-layer BACKGROUND-FILL)
    (gimp-image-select-item img CHANNEL-OP-REPLACE logo-layer)
    (gimp-context-set-background '(0 0 0))
    (gimp-selection-feather img 7.5)
    (gimp-edit-fill shadow-layer BACKGROUND-FILL)
    (gimp-selection-none img)
    (gimp-context-set-foreground '(255 255 255))

    (gimp-edit-blend logo-layer FG-BG-RGB-MODE MULTIPLY-MODE
                     GRADIENT-RADIAL 100 20 REPEAT-NONE FALSE
                     FALSE 0 0 TRUE
                     0 0 width height)

    (gimp-layer-translate shadow-layer 3 3)
    (gimp-layer-translate highlight-layer (- posx 2) (- posy 2))
    (gimp-item-set-name highlight-layer "Highlight")

    (gimp-context-pop)
  )
)

(define (script-fu-basic2-logo-alpha img
                                     logo-layer
                                     bg-color
                                     text-color)
  (begin
    (gimp-image-undo-group-start img)
    (apply-basic2-logo-effect img logo-layer bg-color text-color)
    (gimp-image-undo-group-end img)
    (gimp-displays-flush)
  )
)

(script-fu-register "script-fu-basic2-logo-alpha"
    _"B_asic II..."
    _"Add a shadow and a highlight to the selected region (or alpha)"
    "Spencer Kimball"
    "Spencer Kimball"
    "1996"
    "RGBA"
    SF-IMAGE      "Image"             0
    SF-DRAWABLE   "Drawable"          0
    SF-COLOR      _"Background color" "white"
    SF-COLOR      _"Text color"       '(206 6 50)
)

(define (script-fu-basic2-logo text
                               size
                               font
                               bg-color
                               text-color)
  (let* (
        (img (car (gimp-image-new 256 256 RGB)))
        (text-layer (car (gimp-text-fontname img -1 0 0 text 10 TRUE size PIXELS font)))
        )

    (gimp-image-undo-disable img)
    (apply-basic2-logo-effect img text-layer bg-color text-color)
    (gimp-image-undo-enable img)
    (gimp-display-new img)
  )
)

(script-fu-menu-register "script-fu-basic2-logo-alpha"
                         "<Image>/Filters/Alpha to Logo")

(script-fu-register "script-fu-basic2-logo"
    _"B_asic II..."
    _"Create a simple logo with a shadow and a highlight"
    "Spencer Kimball"
    "Spencer Kimball"
    "1996"
    ""
    SF-STRING     _"Text"               "SCRIPT-FU"
    SF-ADJUSTMENT _"Font size (pixels)" '(150 2 1000 1 10 0 1)
    SF-FONT       _"Font"               "Sans Bold"
    SF-COLOR      _"Background color"   "white"
    SF-COLOR      _"Text color"         '(206 6 50)
)

(script-fu-menu-register "script-fu-basic2-logo"
                         "<Image>/File/Create/Logos")