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+;
+; 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-MASK-BLACK)))
+ (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-context-set-gradient-fg-bg-rgb)
+ (gimp-drawable-edit-gradient-fill bl-mask
+ GRADIENT-LINEAR 20
+ 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-drawable-edit-fill bl-mask FILL-FOREGROUND)
+ )
+ )
+
+ (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-drawable-brightness-contrast bl-layer 0.787 0)
+ )
+
+ ;--- blend glow color inside the letters
+ (gimp-context-set-foreground glow-color)
+ (gimp-context-set-gradient-fg-transparent)
+ (gimp-drawable-edit-gradient-fill bl-layer
+ GRADIENT-LINEAR 0
+ 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-drawable-edit-gradient-fill bl-layer
+ GRADIENT-LINEAR 0
+ 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 CONVERT-DITHER-FS CONVERT-PALETTE-WEB 250 FALSE TRUE "")
+ (set! img (car (plug-in-animationoptimize RUN-NONINTERACTIVE
+ img
+ blended-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")