On Thu, 2004-01-22 at 16:29, Simon Budig wrote:
> Jeff Trefftzs ([EMAIL PROTECTED]) wrote:
> > I've been trying to port one of my scheme scripts to 2.0pre2 and have
> > discovered what I think is a bug.  Before I battle with bugzilla, would
> > someone try to reproduce it?
> Not until you provide the script  :)

;;; pencil-sketch.scm
;;;  Jeff Trefftzs <[EMAIL PROTECTED]>

;;; 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
;;; 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.

;;; Changelog:
;;; 020113 - Version 1.1.  Added multiple choice for edge detection
;;; 020113 - Version 1.01. Fixed mask texture bug.
;;; 020113 - Version 1.0.  Initial Release.

;;; Define the function:

(define (script-fu-pencil-sketch inImage inLayer
       (WhiteLayer (car (gimp-layer-copy inLayer TRUE)))
       (MaskedLayer (car (gimp-layer-copy inLayer TRUE)))
       (EdgeLayer (car (gimp-layer-copy inLayer TRUE)))
       (LayerMask (car (gimp-layer-create-mask MaskedLayer 0)))
    (gimp-image-undo-group-start inImage) ; changed for 1.3/2.0

    (gimp-image-add-layer inImage WhiteLayer -1)
    (gimp-image-add-layer inImage MaskedLayer -1)
    (gimp-image-add-layer inImage EdgeLayer -1)

    (gimp-drawable-set-name WhiteLayer "Paper Layer") ; changed for
    (gimp-drawable-set-name MaskedLayer "Copy with layer mask")
    (gimp-drawable-set-name EdgeLayer "Edges from original image")

    ;; Real work goes in here

    (gimp-drawable-fill WhiteLayer WHITE-IMAGE-FILL) ; Fill the white
    (if (> inTextToggle 0)
          (gimp-patterns-set-pattern inTexture)
          (gimp-edit-bucket-fill WhiteLayer PATTERN-BUCKET-FILL NORMAL-MODE
                            100 0 FALSE 0 0) ; changed for 1.3/2.0
    ;;  Create the layer mask and put the paper pattern in it.

    (gimp-layer-add-mask MaskedLayer LayerMask) ; changed for 1.3/2.0
    (gimp-image-set-active-channel inImage LayerMask)
    (gimp-patterns-set-pattern inMaskPat)
    (gimp-bucket-fill LayerMask PATTERN-BUCKET-FILL NORMAL-MODE
                      100               ; opacity
                      0                 ; threshold
                      FALSE             ; no sample-merged
                      0 0)              ; X, Y coords
    (gimp-image-unset-active-channel inImage) ; finished with it
    ;;  Now find the edges

    (gimp-image-set-active-layer inImage EdgeLayer)
    ;; Edge Detection Here

    (cond ((= inEdges 0)                ; Laplacian edges
           (plug-in-gauss-iir TRUE inImage EdgeLayer inWeight TRUE TRUE)
           (plug-in-laplace TRUE inImage EdgeLayer))

          ((= inEdges 1)                ; Sobel Edges
           (plug-in-sobel TRUE inImage EdgeLayer TRUE TRUE TRUE))

          ;; Synthetic Edges here - Include desaturate if needed

          ((= inEdges 2)                ; Synthetic Edges
           (set! tmplayer (car (gimp-layer-copy EdgeLayer TRUE)))
           (gimp-image-add-layer inImage tmplayer -1)
           (gimp-layer-set-mode tmplayer DIVIDE-MODE)
           (plug-in-gauss-iir TRUE inImage tmplayer inWeight TRUE TRUE)
           (set! EdgeLayer 
                 (car (gimp-image-merge-down inImage tmplayer
           (gimp-levels EdgeLayer VALUE-LUT
                        inDark          ; low input
                        255             ; high input
                        1.0             ; gamma
                        0 255)          ; output 

           ;; Desaturate if needed

           (if (= inMono TRUE)
               (gimp-desaturate EdgeLayer)
          )                             ; end cond
    (gimp-layer-set-mode EdgeLayer DARKEN-ONLY-MODE) ; in case white bg

    (gimp-image-set-active-layer inImage inLayer)
    (gimp-undo-push-group-end inImage)

 _"<Image>/Script-Fu/Alchemy/Pencil Sketch..."
 "Creates an interesting simulation of a pencil sketch by placing a
textured layer mask on the original image, above a white layer, and
below a layer containing edges from the original image.

This script does most of the work, but you may want to adjust the levels
of thelayer mask to vary the amount of image texture.  If you have
additional edge detector plugins (such as the ipx suite), you may want
to use one of them for the edges instead of the built-in laplacian.  I
did not include this option, since the ipx tools are still very much
beta at this time.

Additional interesting effects can be obtained by varying the levels of
the Paper Layer."
 "Jeff Trefftzs"
 "Copyright 2002, Jeff Trefftzs"
 "January 12, 2002"
 SF-IMAGE "The Image" 0
 SF-DRAWABLE "The Layer" 0
 SF-ADJUSTMENT "Line Weight (Fine) 1 <----> 128 (Thick)" 
 '(3 1 128 1 8 0 1)
 SF-ADJUSTMENT "Line Darkness (Light) 0 <----> 255 (Dark)"
 '(127 0 255 1 10 0 1)
 SF-TOGGLE "Monochrome synthetic edges?" TRUE
 SF-OPTION "Edge Detector" '("Laplace" "Sobel" "Synthetic")
 SF-PATTERN "Image Texture" "Paper"
 SF-TOGGLE  "Textured Paper" FALSE
 SF-PATTERN "Paper Texture" "Crinkled Paper"

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