Distress Selection - Printable Version

Code:
;

; distress selection

;

;

; Chris Gutteridge (cjg@ecs.soton.ac.uk)

; At ECS Dept, University of Southampton, England.



; 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 3 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, see <http://www.gnu.org/licenses/>.



; Define the function:



(define (script-fu-distress-selection inImage

                                      inDrawable

                                      inThreshold

                                      inSpread

                                      inGranu

                                      inSmooth

                                      inSmoothH

                                      inSmoothV)



  (let (

       (theImage inImage)

       (theWidth (car (gimp-image-width inImage)))

       (theHeight (car (gimp-image-height inImage)))

       (theLayer 0)

       (theMode (car (gimp-image-base-type inImage)))

       (prevLayer (car (gimp-image-get-active-layer inImage)))

       )



    (gimp-context-push)

    (gimp-context-set-defaults)

    (gimp-image-undo-group-start theImage)



    (if (= theMode GRAY)

      (set! theMode GRAYA-IMAGE)

      (set! theMode RGBA-IMAGE)

    )

    (set! theLayer (car (gimp-layer-new theImage

                                        theWidth

                                        theHeight

                                        theMode

                                        "Distress Scratch Layer"

                                        100

                                        NORMAL-MODE)))



    (gimp-image-insert-layer theImage theLayer 0 0)



    (if (= FALSE (car (gimp-selection-is-empty theImage)))

        (gimp-edit-fill theLayer BACKGROUND-FILL)

    )



    (gimp-selection-invert theImage)



    (if (= FALSE (car (gimp-selection-is-empty theImage)))

        (gimp-edit-clear theLayer)

    )



    (gimp-selection-invert theImage)

    (gimp-selection-none inImage)



    (gimp-layer-scale theLayer

                      (/ theWidth inGranu)

                      (/ theHeight inGranu)

                      TRUE)



    (plug-in-spread RUN-NONINTERACTIVE

                    theImage

                    theLayer

                    inSpread

                    inSpread)



    (plug-in-gauss-iir RUN-NONINTERACTIVE

           theImage theLayer inSmooth inSmoothH inSmoothV)

    (gimp-layer-scale theLayer theWidth theHeight TRUE)

    (plug-in-threshold-alpha RUN-NONINTERACTIVE theImage theLayer inThreshold)

    (plug-in-gauss-iir RUN-NONINTERACTIVE theImage theLayer 1 TRUE TRUE)

    (gimp-image-select-item inImage CHANNEL-OP-REPLACE theLayer)

    (gimp-image-remove-layer theImage theLayer)

    (if (and (= (car (gimp-item-is-channel inDrawable)) TRUE)

             (= (car (gimp-item-is-layer-mask inDrawable)) FALSE))

      (gimp-image-set-active-channel theImage inDrawable)

      )

    (gimp-image-undo-group-end theImage)



    (gimp-image-set-active-layer theImage prevLayer)



    (gimp-displays-flush)

    (gimp-context-pop)

  )

)





(script-fu-register "script-fu-distress-selection"

  _"_Distort..."

  _"Distress the selection"

  "Chris Gutteridge"

  "1998, Chris Gutteridge / ECS dept, University of Southampton, England."

  "23rd April 1998"

  "RGB*,GRAY*"

  SF-IMAGE       "The image"              0

  SF-DRAWABLE    "The layer"              0

  SF-ADJUSTMENT _"Threshold (bigger 1<-->254 smaller)" '(127 1 254 1 10 0 0)

  SF-ADJUSTMENT _"Spread"                 '(8 0 1000 1 10 0 1)

  SF-ADJUSTMENT _"Granularity (1 is low)" '(4 1 25 1 10 0 1)

  SF-ADJUSTMENT _"Smooth"                 '(2 1 150 1 10 0 1)

  SF-TOGGLE     _"Smooth horizontally"    TRUE

  SF-TOGGLE     _"Smooth vertically"      TRUE

)



(script-fu-menu-register "script-fu-distress-selection"

                         "<Image>/Select/Modify")