244 lines
9.1 KiB
Scheme
244 lines
9.1 KiB
Scheme
;
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; burn-in-anim.scm V2.1 - script-fu for PIKA 1.1 and higher
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;
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; Copyright (C) 9/2000 Roland Berger
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; roland@fuchur.leute.server.de
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; http://fuchur.leute.server.de
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;
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; Let text appear and fade out with a "burn-in" like SFX.
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; Works on an image with a text and a background layer
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;
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; Copying Policy: GNU Public License http://www.gnu.org
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;
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(define (script-fu-burn-in-anim org-img
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org-layer
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glow-color
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fadeout
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bl-width
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corona-width
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after-glow
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show-glow
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optimize
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speed)
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(let* (
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;--- main variable: "bl-x" runs from 0 to layer-width
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(bl-x 0)
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(frame-nr 0)
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(img 0)
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(source-layer 0)
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(bg-source-layer 0)
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(source-layer-width 0)
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(bg-layer 0)
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(bg-layer-name 0)
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(bl-layer 0)
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(bl-layer-name 0)
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(bl-mask 0)
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(bl-layer-width 0)
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(bl-height 0)
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(bl-x-off 0)
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(bl-y-off 0)
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(nofadeout-bl-x-off 0)
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(nofadeout-bl-width 0)
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(blended-layer 0)
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(img-display 0)
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)
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(if (< speed 1)
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(set! speed (* -1 speed)) )
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;--- check image and work on a copy
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(if (and (= (car (pika-image-get-layers org-img)) 2)
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(= (car (pika-image-get-floating-sel org-img)) -1))
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;--- main program structure starts here, begin of "if-1"
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(begin
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(pika-context-push)
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(pika-context-set-defaults)
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(set! img (car (pika-image-duplicate org-img)))
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(pika-image-undo-disable img)
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(if (> (car (pika-drawable-type org-layer)) 1 )
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(pika-image-convert-rgb img))
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(set! source-layer (aref (cadr (pika-image-get-layers img)) 0 ))
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(set! bg-source-layer (aref (cadr (pika-image-get-layers img)) 1 ))
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(set! source-layer-width (car (pika-drawable-get-width source-layer)))
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;--- hide layers, cause we want to "merge visible layers" later
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(pika-item-set-visible source-layer FALSE)
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(pika-item-set-visible bg-source-layer FALSE)
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;--- process image horizontal with pixel-speed
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(while (< bl-x (+ source-layer-width bl-width))
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(set! bl-layer (car (pika-layer-copy source-layer TRUE)))
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(set! bl-layer-name (string-append "fr-nr"
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(number->string frame-nr 10) ) )
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(pika-image-insert-layer img bl-layer 0 -2)
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(pika-item-set-name bl-layer bl-layer-name)
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(pika-item-set-visible bl-layer TRUE)
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(pika-layer-set-lock-alpha bl-layer TRUE)
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(pika-layer-add-alpha bl-layer)
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;--- add an alpha mask for blending and select it
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(pika-image-select-item img CHANNEL-OP-REPLACE bl-layer)
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(set! bl-mask (car (pika-layer-create-mask bl-layer ADD-MASK-BLACK)))
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(pika-layer-add-mask bl-layer bl-mask)
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;--- handle layer geometry
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(set! bl-layer-width source-layer-width)
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(set! bl-height (car (pika-drawable-get-height bl-layer)))
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(set! bl-x-off (- bl-x bl-width))
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(set! bl-x-off (+ bl-x-off (car (pika-drawable-get-offsets bl-layer))))
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(set! bl-y-off (cadr (pika-drawable-get-offsets bl-layer)))
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;--- select a rectangular area to blend
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(pika-image-select-rectangle img CHANNEL-OP-REPLACE bl-x-off bl-y-off bl-width bl-height)
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;--- select at least 1 pixel!
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(pika-image-select-rectangle img CHANNEL-OP-ADD bl-x-off bl-y-off (+ bl-width 1) bl-height)
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(if (= fadeout FALSE)
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(begin
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(set! nofadeout-bl-x-off (car (pika-drawable-get-offsets bl-layer)))
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(set! nofadeout-bl-width (+ nofadeout-bl-x-off bl-x))
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(set! nofadeout-bl-width (max nofadeout-bl-width 1))
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(pika-image-select-rectangle img CHANNEL-OP-REPLACE
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nofadeout-bl-x-off bl-y-off
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nofadeout-bl-width bl-height)
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)
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)
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;--- alpha blending text to trans (fadeout)
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(pika-context-set-foreground '(255 255 255))
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(pika-context-set-background '( 0 0 0))
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(if (= fadeout TRUE)
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(begin
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; blend with 20% offset to get less transparency in the front
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(pika-context-set-gradient-fg-bg-rgb)
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(pika-drawable-edit-gradient-fill bl-mask
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GRADIENT-LINEAR 20
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FALSE 0 0
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TRUE
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(+ bl-x-off bl-width) 0
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bl-x-off 0)
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)
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)
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(if (= fadeout FALSE)
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(begin
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(pika-context-set-foreground '(255 255 255))
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(pika-drawable-edit-fill bl-mask FILL-FOREGROUND)
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)
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)
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(pika-layer-remove-mask bl-layer MASK-APPLY)
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;--- add bright glow in front
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(if (= show-glow TRUE)
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(begin
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;--- add some brightness to whole text
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(if (= fadeout TRUE)
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(pika-drawable-brightness-contrast bl-layer 0.787 0)
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)
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;--- blend glow color inside the letters
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(pika-context-set-foreground glow-color)
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(pika-context-set-gradient-fg-transparent)
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(pika-drawable-edit-gradient-fill bl-layer
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GRADIENT-LINEAR 0
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FALSE 0 0
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TRUE
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(+ bl-x-off bl-width) 0
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(- (+ bl-x-off bl-width) after-glow) 0)
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;--- add corona effect
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(pika-image-select-item img CHANNEL-OP-REPLACE bl-layer)
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(pika-selection-sharpen img)
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(pika-selection-grow img corona-width)
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(pika-layer-set-lock-alpha bl-layer FALSE)
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(pika-selection-feather img corona-width)
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(pika-context-set-foreground glow-color)
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(pika-drawable-edit-gradient-fill bl-layer
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GRADIENT-LINEAR 0
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FALSE 0 0
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TRUE
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(- (+ bl-x-off bl-width) corona-width) 0
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(- (+ bl-x-off bl-width) after-glow) 0)
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)
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)
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;--- merge with bg layer
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(set! bg-layer (car (pika-layer-copy bg-source-layer FALSE)))
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(pika-image-insert-layer img bg-layer 0 -1)
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(pika-image-lower-item img bg-layer)
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(set! bg-layer-name (string-append "bg-"
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(number->string frame-nr 10)))
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(pika-item-set-name bg-layer bg-layer-name)
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(pika-item-set-visible bg-layer TRUE)
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(set! blended-layer (car (pika-image-merge-visible-layers img
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CLIP-TO-IMAGE)))
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;(set! blended-layer bl-layer)
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(pika-item-set-visible blended-layer FALSE)
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;--- end of "while" loop
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(set! frame-nr (+ frame-nr 1))
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(set! bl-x (+ bl-x speed))
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)
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;--- finalize the job
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(pika-selection-none img)
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(pika-image-remove-layer img source-layer)
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(pika-image-remove-layer img bg-source-layer)
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(pika-image-set-file img "burn-in.xcf")
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(if (= optimize TRUE)
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(begin
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(pika-image-convert-indexed img CONVERT-DITHER-FS CONVERT-PALETTE-WEB 250 FALSE TRUE "")
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(set! img (car (plug-in-animationoptimize RUN-NONINTERACTIVE
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img
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blended-layer)))
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)
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)
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(pika-item-set-visible (aref (cadr (pika-image-get-layers img)) 0)
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TRUE)
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(pika-image-undo-enable img)
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(pika-image-clean-all img)
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(set! img-display (car (pika-display-new img)))
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(pika-displays-flush)
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(pika-context-pop)
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)
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;--- false form of "if-1"
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(pika-message _"The Burn-In script needs two layers in total. A foreground layer with transparency and a background layer.")
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)
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)
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)
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(script-fu-register "script-fu-burn-in-anim"
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_"B_urn-In..."
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_"Create intermediate layers to produce an animated 'burn-in' transition between two layers"
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"Roland Berger roland@fuchur.leute.server.de"
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"Roland Berger"
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"January 2001"
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"RGBA GRAYA INDEXEDA"
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SF-IMAGE "The image" 0
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SF-DRAWABLE "Layer to animate" 0
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SF-COLOR _"Glow color" "white"
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SF-TOGGLE _"Fadeout" FALSE
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SF-VALUE _"Fadeout width" "100"
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SF-VALUE _"Corona width" "7"
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SF-VALUE _"After glow" "50"
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SF-TOGGLE _"Add glowing" TRUE
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SF-TOGGLE _"Prepare for GIF" FALSE
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SF-VALUE _"Speed (pixels/frame)" "50"
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)
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(script-fu-menu-register "script-fu-burn-in-anim"
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"<Image>/Filters/Animation/")
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