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GIMP Script-Fu Script | 2005-06-30 | 6.9 KB | 176 lines |
- ; The GIMP -- an image manipulation program
- ; Copyright (C) 1995 Spencer Kimball and Peter Mattis
- ;
- ; alien-neon-logo.scm - creates multiple outlines around the letters
- ; Copyright (C) 1999-2000 Raphael Quinet <quinet@gamers.org>
- ;
- ; 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 2 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, write to the Free Software
- ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- ;
- ; 1999-12-01 First version.
- ; 2000-02-19 Do not discard the layer mask so that it can still be edited.
- ; 2000-03-08 Adapted the script to my gimp-edit-fill changes.
- ; 2000-04-02 Split the script in two parts: one using text, one using alpha.
- ; 2000-05-29 More modifications for "Alpha to Logo" using a separate function.
- ;
- ; To do: use a channel mask for creating the bands, instead of working in the
- ; image. gimp-invert would then work on one grayscale channel instead of
- ; wasting CPU cycles on three identical R, G, B channels.
- ;
-
- (define (apply-alien-neon-logo-effect img
- logo-layer
- fg-color
- bg-color
- band-size
- gap-size
- num-bands
- do-fade)
- (let* ((fade-size (- (* (+ band-size gap-size) num-bands) 1))
- (width (car (gimp-drawable-width logo-layer)))
- (height (car (gimp-drawable-height logo-layer)))
- (bg-layer (car (gimp-layer-new img width height RGB-IMAGE "Background" 100 NORMAL-MODE)))
- (bands-layer (car (gimp-layer-new img width height RGBA-IMAGE "Bands" 100 NORMAL-MODE))))
-
- (gimp-context-push)
-
- (script-fu-util-image-resize-from-layer img logo-layer)
- (gimp-image-add-layer img bg-layer 1)
- (gimp-image-add-layer img bands-layer 1)
- (gimp-selection-none img)
- (gimp-context-set-background bg-color)
- (gimp-edit-fill bg-layer BACKGROUND-FILL)
- (gimp-context-set-background '(0 0 0))
- (gimp-edit-fill bands-layer BACKGROUND-FILL)
- ; The text layer is never shown: it is only used to create a selection
- (gimp-selection-layer-alpha logo-layer)
- (gimp-context-set-foreground '(255 255 255))
- (gimp-edit-fill bands-layer FOREGROUND-FILL)
-
- ; Create multiple outlines by growing and inverting the selection
- ; The bands are black and white because they will be used as a mask.
- (while (> num-bands 0)
- (gimp-selection-grow img band-size)
- (gimp-invert bands-layer)
- (gimp-selection-grow img gap-size)
- (gimp-invert bands-layer)
- (set! num-bands (- num-bands 1)))
-
- ; The fading effect is obtained by masking the image with a gradient.
- ; The gradient is created by filling a bordered selection (white->black).
- (if (= do-fade TRUE)
- (let ((bands-layer-mask (car (gimp-layer-create-mask bands-layer
- ADD-BLACK-MASK))))
- (gimp-layer-add-mask bands-layer bands-layer-mask)
- (gimp-selection-layer-alpha logo-layer)
- (gimp-selection-border img fade-size)
- (gimp-edit-fill bands-layer-mask FOREGROUND-FILL)
- (gimp-layer-remove-mask bands-layer MASK-APPLY)))
-
- ; Transfer the resulting grayscale bands into the layer mask.
- (let ((bands-layer-mask (car (gimp-layer-create-mask bands-layer
- ADD-BLACK-MASK))))
- (gimp-layer-add-mask bands-layer bands-layer-mask)
- (gimp-selection-none img)
- (gimp-edit-copy bands-layer)
- (gimp-floating-sel-anchor (car (gimp-edit-paste bands-layer-mask
- FALSE))))
-
- ; Fill the layer with the foreground color. The areas that are not
- ; masked become visible.
- (gimp-context-set-foreground fg-color)
- (gimp-edit-fill bands-layer FOREGROUND-FILL)
- ;; (gimp-layer-remove-mask bands-layer MASK-APPLY)
-
- ; Clean up and exit.
- (gimp-drawable-set-visible logo-layer 0)
- (gimp-image-set-active-layer img bands-layer)
- (gimp-displays-flush)
-
- (gimp-context-pop)))
-
- (define (script-fu-alien-neon-logo-alpha img
- logo-layer
- fg-color
- bg-color
- band-size
- gap-size
- num-bands
- do-fade)
- (begin
- (gimp-image-undo-group-start img)
- (apply-alien-neon-logo-effect img logo-layer fg-color bg-color
- band-size gap-size num-bands do-fade)
- (gimp-image-undo-group-end img)
- (gimp-displays-flush)))
-
- (script-fu-register "script-fu-alien-neon-logo-alpha"
- _"Alien _Neon..."
- "Creates a psychedelic effect with outlines of the specified color around the letters"
- "Raphael Quinet (quinet@gamers.org)"
- "Raphael Quinet"
- "1999-2000"
- "RGBA"
- SF-IMAGE "Image" 0
- SF-DRAWABLE "Drawable" 0
- SF-COLOR _"Glow color" '(0 255 0)
- SF-COLOR _"Background color" '(0 0 0)
- SF-ADJUSTMENT _"Width of bands" '(2 1 60 1 10 0 0)
- SF-ADJUSTMENT _"Width of gaps" '(2 1 60 1 10 0 0)
- SF-ADJUSTMENT _"Number of bands" '(7 1 100 1 10 0 1)
- SF-TOGGLE _"Fade away" TRUE)
-
- (script-fu-menu-register "script-fu-alien-neon-logo-alpha"
- _"<Image>/Script-Fu/Alpha to Logo")
-
-
- (define (script-fu-alien-neon-logo text
- size
- fontname
- fg-color
- bg-color
- band-size
- gap-size
- num-bands
- do-fade)
- (let* ((img (car (gimp-image-new 256 256 RGB)))
- (fade-size (- (* (+ band-size gap-size) num-bands) 1))
- (text-layer (car (gimp-text-fontname img -1 0 0 text (+ fade-size 10) TRUE size PIXELS fontname))))
- (gimp-image-undo-disable img)
- (gimp-drawable-set-name text-layer text)
- (apply-alien-neon-logo-effect img text-layer fg-color bg-color
- band-size gap-size num-bands do-fade)
- (gimp-image-undo-enable img)
- (gimp-display-new img)))
-
- (script-fu-register "script-fu-alien-neon-logo"
- _"Alien _Neon..."
- "Creates a psychedelic effect with outlines of the specified color around the letters"
- "Raphael Quinet (quinet@gamers.org)"
- "Raphael Quinet"
- "1999-2000"
- ""
- SF-STRING _"Text" "The GIMP"
- SF-ADJUSTMENT _"Font size (pixels)" '(150 2 1000 1 10 0 1)
- SF-FONT _"Font" "Blippo"
- SF-COLOR _"Glow color" '(0 255 0)
- SF-COLOR _"Background color" '(0 0 0)
- SF-ADJUSTMENT _"Width of bands" '(2 1 60 1 10 0 0)
- SF-ADJUSTMENT _"Width of gaps" '(2 1 60 1 10 0 0)
- SF-ADJUSTMENT _"Number of bands" '(7 1 100 1 10 0 1)
- SF-TOGGLE _"Fade away" TRUE)
-
- (script-fu-menu-register "script-fu-alien-neon-logo"
- _"<Toolbox>/Xtns/Script-Fu/Logos")
-