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GIMP Script-Fu Script | 2005-06-30 | 5.6 KB | 168 lines |
- ; Nova Starscape
- ; Create a text effect that simulates an eerie alien glow around text
-
- (define (find-blend-coords w
- h)
- (let* ((denom (+ (/ w h) (/ h w)))
- (bx (/ (* -2 h) denom))
- (by (/ (* -2 w) denom)))
- (cons bx by)))
-
- (define (find-nova-x-coord drawable
- x1
- x2
- y)
- (let* ((x 0)
- (alpha 3)
- (range (- x2 x1))
- (min-clearance 5)
- (val '())
- (val-left '())
- (val-right '())
- (val-top '())
- (val-bottom '())
- (limit 100)
- (clearance 0))
- (while (and (= clearance 0) (> limit 0))
- (set! x (+ (rand range) x1))
- (set! val (cadr (gimp-drawable-get-pixel drawable x y)))
- (set! val-left (cadr (gimp-drawable-get-pixel drawable (- x min-clearance) y)))
- (set! val-right (cadr (gimp-drawable-get-pixel drawable (+ x min-clearance) y)))
- (set! val-top (cadr (gimp-drawable-get-pixel drawable x (- y min-clearance))))
- (set! val-bottom (cadr (gimp-drawable-get-pixel drawable x (+ y min-clearance))))
- (if (and (= (aref val alpha) 0) (= (aref val-left alpha) 0) (= (aref val-right alpha) 0)
- (= (aref val-top alpha) 0) (= (aref val-bottom alpha) 0))
- (set! clearance 1) (set! limit (- limit 1))))
- x))
-
- (define (apply-starscape-logo-effect img
- logo-layer
- size
- glow-color)
- (let* ((border (/ size 4))
- (grow (/ size 30))
- (offx (* size 0.03))
- (offy (* size 0.02))
- (feather (/ size 4))
- (shadow-feather (/ size 25))
- (width (car (gimp-drawable-width logo-layer)))
- (height (car (gimp-drawable-height logo-layer)))
- (w (* (/ (- width (* border 2)) 2.0) 0.75))
- (h (* (/ (- height (* border 2)) 2.0) 0.75))
- (novay (* height 0.3))
- (novax (find-nova-x-coord logo-layer (* width 0.2) (* width 0.8) novay))
- (novaradius (/ (min height width) 7.0))
- (cx (/ width 2.0))
- (cy (/ height 2.0))
- (bx (+ cx (car (find-blend-coords w h))))
- (by (+ cy (cdr (find-blend-coords w h))))
- (bg-layer (car (gimp-layer-new img width height RGB-IMAGE "Background" 100 NORMAL-MODE)))
- (glow-layer (car (gimp-layer-new img width height RGBA-IMAGE "Glow" 100 NORMAL-MODE)))
- (shadow-layer (car (gimp-layer-new img width height RGBA-IMAGE "Drop Shadow" 100 NORMAL-MODE)))
- (bump-channel (car (gimp-channel-new img width height "Bump Map" 50 '(0 0 0)))))
-
- (gimp-context-push)
-
- (gimp-selection-none img)
- (script-fu-util-image-resize-from-layer img logo-layer)
- (gimp-image-add-layer img bg-layer 1)
- (gimp-image-add-layer img glow-layer 1)
- (gimp-image-add-layer img shadow-layer 1)
- (gimp-image-add-channel img bump-channel 0)
- (gimp-layer-set-preserve-trans logo-layer TRUE)
-
- (gimp-context-set-background '(0 0 0))
- (gimp-edit-fill bg-layer BACKGROUND-FILL)
- (gimp-edit-clear shadow-layer)
- (gimp-edit-clear glow-layer)
-
- (gimp-selection-layer-alpha logo-layer)
- (gimp-selection-grow img grow)
- (gimp-selection-feather img feather)
- (gimp-context-set-background glow-color)
- (gimp-selection-feather img feather)
- (gimp-edit-fill glow-layer BACKGROUND-FILL)
-
- (gimp-selection-layer-alpha logo-layer)
- (gimp-selection-feather img shadow-feather)
- (gimp-context-set-background '(0 0 0))
- (gimp-selection-translate img offx offy)
- (gimp-edit-fill shadow-layer BACKGROUND-FILL)
-
- (gimp-selection-none img)
- (gimp-context-set-background '(31 31 31))
- (gimp-context-set-foreground '(255 255 255))
-
- (gimp-edit-blend logo-layer FG-BG-RGB-MODE NORMAL-MODE
- GRADIENT-BILINEAR 100 0 REPEAT-NONE FALSE
- FALSE 0 0 TRUE
- cx cy bx by)
-
- (plug-in-nova 1 img glow-layer novax novay glow-color novaradius 100 0)
-
- (gimp-selection-all img)
- (gimp-context-set-pattern "Stone")
- (gimp-edit-bucket-fill bump-channel PATTERN-BUCKET-FILL NORMAL-MODE 100 0 FALSE 0 0)
- (plug-in-bump-map 1 img logo-layer bump-channel
- 135.0 45.0 4 0 0 0 0 FALSE FALSE 0)
- (gimp-image-remove-channel img bump-channel)
- (gimp-selection-none img)
-
- (gimp-context-pop)))
-
-
- (define (script-fu-starscape-logo-alpha img
- logo-layer
- size
- glow-color)
- (begin
- (gimp-image-undo-group-start img)
- (apply-starscape-logo-effect img logo-layer size glow-color)
- (gimp-image-undo-group-end img)
- (gimp-displays-flush)))
-
- (script-fu-register "script-fu-starscape-logo-alpha"
- _"Sta_rscape..."
- "Starscape using the Nova plug-in"
- "Spencer Kimball"
- "Spencer Kimball"
- "1997"
- "RGBA"
- SF-IMAGE "Image" 0
- SF-DRAWABLE "Drawable" 0
- SF-ADJUSTMENT _"Effect size (pixels * 4)" '(150 1 1000 1 10 0 1)
- SF-COLOR _"Glow color" '(28 65 188))
-
- (script-fu-menu-register "script-fu-starscape-logo-alpha"
- _"<Image>/Script-Fu/Alpha to Logo")
-
-
- (define (script-fu-starscape-logo text
- size
- fontname
- glow-color)
- (let* ((img (car (gimp-image-new 256 256 RGB)))
- (border (/ size 4))
- (text-layer (car (gimp-text-fontname img -1 0 0 text border
- TRUE size PIXELS fontname))))
- (gimp-image-undo-disable img)
- (gimp-drawable-set-name text-layer text)
- (apply-starscape-logo-effect img text-layer size glow-color)
- (gimp-image-undo-enable img)
- (gimp-display-new img)))
-
- (script-fu-register "script-fu-starscape-logo"
- _"Sta_rscape..."
- "Starscape using the Nova plug-in"
- "Spencer Kimball"
- "Spencer Kimball"
- "1997"
- ""
- SF-STRING _"Text" "Nova"
- SF-ADJUSTMENT _"Font size (pixels)" '(150 1 1000 1 10 0 1)
- SF-FONT _"Font" "Engraver"
- SF-COLOR _"Glow color" '(28 65 188))
-
- (script-fu-menu-register "script-fu-starscape-logo"
- _"<Toolbox>/Xtns/Script-Fu/Logos")
-