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+; GIMP - The GNU Image Manipulation Program
+; Copyright (C) 1995 Spencer Kimball and Peter Mattis
+;
+; Weave script --- make an image look as if it were woven
+; Copyright (C) 1997 Federico Mena Quintero
+; federico@nuclecu.unam.mx
+;
+; 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 <https://www.gnu.org/licenses/>.
+
+
+; Copies the specified rectangle from/to the specified drawable
+
+(define (copy-rectangle img
+ drawable
+ x1
+ y1
+ width
+ height
+ dest-x
+ dest-y)
+ (gimp-image-select-rectangle img CHANNEL-OP-REPLACE x1 y1 width height)
+ (gimp-edit-copy drawable)
+ (let ((floating-sel (car (gimp-edit-paste drawable FALSE))))
+ (gimp-layer-set-offsets floating-sel dest-x dest-y)
+ (gimp-floating-sel-anchor floating-sel))
+ (gimp-selection-none img))
+
+; Creates a single weaving tile
+
+(define (create-weave-tile ribbon-width
+ ribbon-spacing
+ shadow-darkness
+ shadow-depth)
+ (let* ((tile-size (+ (* 2 ribbon-width) (* 2 ribbon-spacing)))
+ (darkness (* 255 (/ (- 100 shadow-darkness) 100)))
+ (img (car (gimp-image-new tile-size tile-size RGB)))
+ (drawable (car (gimp-layer-new img tile-size tile-size RGB-IMAGE
+ "Weave tile" 100 LAYER-MODE-NORMAL))))
+
+ (gimp-image-undo-disable img)
+ (gimp-image-insert-layer img drawable 0 0)
+
+ (gimp-context-set-background '(0 0 0))
+ (gimp-drawable-edit-fill drawable FILL-BACKGROUND)
+
+ ; Create main horizontal ribbon
+
+ (gimp-context-set-foreground '(255 255 255))
+ (gimp-context-set-background (list darkness darkness darkness))
+
+ (gimp-image-select-rectangle img
+ CHANNEL-OP-REPLACE
+ 0
+ ribbon-spacing
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ ribbon-width)
+
+ (gimp-context-set-gradient-fg-bg-rgb)
+ (gimp-drawable-edit-gradient-fill drawable
+ GRADIENT-BILINEAR (- 100 shadow-depth)
+ FALSE 0 0
+ TRUE
+ (/ (+ (* 2 ribbon-spacing) ribbon-width -1) 2) 0
+ 0 0)
+
+ ; Create main vertical ribbon
+
+ (gimp-image-select-rectangle img
+ CHANNEL-OP-REPLACE
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ 0
+ ribbon-width
+ (+ (* 2 ribbon-spacing) ribbon-width))
+
+ (gimp-drawable-edit-gradient-fill drawable
+ GRADIENT-BILINEAR (- 100 shadow-depth)
+ FALSE 0 0
+ TRUE
+ 0 (/ (+ (* 2 ribbon-spacing) ribbon-width -1) 2)
+ 0 0)
+
+ ; Create the secondary horizontal ribbon
+
+ (copy-rectangle img
+ drawable
+ 0
+ ribbon-spacing
+ (+ ribbon-width ribbon-spacing)
+ ribbon-width
+ (+ ribbon-width ribbon-spacing)
+ (+ (* 2 ribbon-spacing) ribbon-width))
+
+ (copy-rectangle img
+ drawable
+ (+ ribbon-width ribbon-spacing)
+ ribbon-spacing
+ ribbon-spacing
+ ribbon-width
+ 0
+ (+ (* 2 ribbon-spacing) ribbon-width))
+
+ ; Create the secondary vertical ribbon
+
+ (copy-rectangle img
+ drawable
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ 0
+ ribbon-width
+ (+ ribbon-width ribbon-spacing)
+ ribbon-spacing
+ (+ ribbon-width ribbon-spacing))
+
+ (copy-rectangle img
+ drawable
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ (+ ribbon-width ribbon-spacing)
+ ribbon-width
+ ribbon-spacing
+ ribbon-spacing
+ 0)
+
+ ; Done
+
+ (gimp-image-undo-enable img)
+ (list img drawable)))
+
+; Creates a complete weaving mask
+
+(define (create-weave width
+ height
+ ribbon-width
+ ribbon-spacing
+ shadow-darkness
+ shadow-depth)
+ (let* ((tile (create-weave-tile ribbon-width ribbon-spacing shadow-darkness
+ shadow-depth))
+ (tile-img (car tile))
+ (tile-layer (cadr tile))
+ (weaving (plug-in-tile RUN-NONINTERACTIVE tile-img tile-layer width height TRUE)))
+ (gimp-image-delete tile-img)
+ weaving))
+
+; Creates a single tile for masking
+
+(define (create-mask-tile ribbon-width
+ ribbon-spacing
+ r1-x1
+ r1-y1
+ r1-width
+ r1-height
+ r2-x1
+ r2-y1
+ r2-width
+ r2-height
+ r3-x1
+ r3-y1
+ r3-width
+ r3-height)
+ (let* ((tile-size (+ (* 2 ribbon-width) (* 2 ribbon-spacing)))
+ (img (car (gimp-image-new tile-size tile-size RGB)))
+ (drawable (car (gimp-layer-new img tile-size tile-size RGB-IMAGE
+ "Mask" 100 LAYER-MODE-NORMAL))))
+ (gimp-image-undo-disable img)
+ (gimp-image-insert-layer img drawable 0 0)
+
+ (gimp-context-set-background '(0 0 0))
+ (gimp-drawable-edit-fill drawable FILL-BACKGROUND)
+
+ (gimp-image-select-rectangle img CHANNEL-OP-REPLACE r1-x1 r1-y1 r1-width r1-height)
+ (gimp-image-select-rectangle img CHANNEL-OP-ADD r2-x1 r2-y1 r2-width r2-height)
+ (gimp-image-select-rectangle img CHANNEL-OP-ADD r3-x1 r3-y1 r3-width r3-height)
+
+ (gimp-context-set-background '(255 255 255))
+ (gimp-drawable-edit-fill drawable FILL-BACKGROUND)
+ (gimp-selection-none img)
+
+ (gimp-image-undo-enable img)
+
+ (list img drawable)))
+
+; Creates a complete mask image
+
+(define (create-mask final-width
+ final-height
+ ribbon-width
+ ribbon-spacing
+ r1-x1
+ r1-y1
+ r1-width
+ r1-height
+ r2-x1
+ r2-y1
+ r2-width
+ r2-height
+ r3-x1
+ r3-y1
+ r3-width
+ r3-height)
+ (let* ((tile (create-mask-tile ribbon-width ribbon-spacing
+ r1-x1 r1-y1 r1-width r1-height
+ r2-x1 r2-y1 r2-width r2-height
+ r3-x1 r3-y1 r3-width r3-height))
+ (tile-img (car tile))
+ (tile-layer (cadr tile))
+ (mask (plug-in-tile RUN-NONINTERACTIVE tile-img tile-layer final-width final-height
+ TRUE)))
+ (gimp-image-delete tile-img)
+ mask))
+
+; Creates the mask for horizontal ribbons
+
+(define (create-horizontal-mask ribbon-width
+ ribbon-spacing
+ final-width
+ final-height)
+ (create-mask final-width
+ final-height
+ ribbon-width
+ ribbon-spacing
+ 0
+ ribbon-spacing
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ ribbon-width
+ 0
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ ribbon-spacing
+ ribbon-width
+ (+ ribbon-width ribbon-spacing)
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ (+ ribbon-width ribbon-spacing)
+ ribbon-width))
+
+; Creates the mask for vertical ribbons
+
+(define (create-vertical-mask ribbon-width
+ ribbon-spacing
+ final-width
+ final-height)
+ (create-mask final-width
+ final-height
+ ribbon-width
+ ribbon-spacing
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ 0
+ ribbon-width
+ (+ (* 2 ribbon-spacing) ribbon-width)
+ ribbon-spacing
+ 0
+ ribbon-width
+ ribbon-spacing
+ ribbon-spacing
+ (+ ribbon-width ribbon-spacing)
+ ribbon-width
+ (+ ribbon-width ribbon-spacing)))
+
+; Adds a threads layer at a certain orientation to the specified image
+
+(define (create-threads-layer img
+ width
+ height
+ length
+ density
+ orientation)
+ (let* ((drawable (car (gimp-layer-new img width height RGBA-IMAGE
+ "Threads" 100 LAYER-MODE-NORMAL)))
+ (dense (/ density 100.0)))
+ (gimp-image-insert-layer img drawable 0 -1)
+ (gimp-context-set-background '(255 255 255))
+ (gimp-drawable-edit-fill drawable FILL-BACKGROUND)
+ (plug-in-noisify RUN-NONINTERACTIVE img drawable FALSE dense dense dense dense)
+ (plug-in-c-astretch RUN-NONINTERACTIVE img drawable)
+ (cond ((eq? orientation 'horizontal)
+ (plug-in-gauss-rle RUN-NONINTERACTIVE img drawable length TRUE FALSE))
+ ((eq? orientation 'vertical)
+ (plug-in-gauss-rle RUN-NONINTERACTIVE img drawable length FALSE TRUE)))
+ (plug-in-c-astretch RUN-NONINTERACTIVE img drawable)
+ drawable))
+
+(define (create-complete-weave width
+ height
+ ribbon-width
+ ribbon-spacing
+ shadow-darkness
+ shadow-depth
+ thread-length
+ thread-density
+ thread-intensity)
+ (let* ((weave (create-weave width height ribbon-width ribbon-spacing
+ shadow-darkness shadow-depth))
+ (w-img (car weave))
+ (w-layer (cadr weave))
+
+ (h-layer (create-threads-layer w-img width height thread-length
+ thread-density 'horizontal))
+ (h-mask (car (gimp-layer-create-mask h-layer ADD-MASK-WHITE)))
+
+ (v-layer (create-threads-layer w-img width height thread-length
+ thread-density 'vertical))
+ (v-mask (car (gimp-layer-create-mask v-layer ADD-MASK-WHITE)))
+
+ (hmask (create-horizontal-mask ribbon-width ribbon-spacing
+ width height))
+ (hm-img (car hmask))
+ (hm-layer (cadr hmask))
+
+ (vmask (create-vertical-mask ribbon-width ribbon-spacing width height))
+ (vm-img (car vmask))
+ (vm-layer (cadr vmask)))
+
+ (gimp-layer-add-mask h-layer h-mask)
+ (gimp-selection-all hm-img)
+ (gimp-edit-copy hm-layer)
+ (gimp-image-delete hm-img)
+ (gimp-floating-sel-anchor (car (gimp-edit-paste h-mask FALSE)))
+ (gimp-layer-set-opacity h-layer thread-intensity)
+ (gimp-layer-set-mode h-layer LAYER-MODE-MULTIPLY)
+
+ (gimp-layer-add-mask v-layer v-mask)
+ (gimp-selection-all vm-img)
+ (gimp-edit-copy vm-layer)
+ (gimp-image-delete vm-img)
+ (gimp-floating-sel-anchor (car (gimp-edit-paste v-mask FALSE)))
+ (gimp-layer-set-opacity v-layer thread-intensity)
+ (gimp-layer-set-mode v-layer LAYER-MODE-MULTIPLY)
+
+ ; Uncomment this if you want to keep the weaving mask image
+ ; (gimp-display-new (car (gimp-image-duplicate w-img)))
+
+ (list w-img
+ (car (gimp-image-flatten w-img)))))
+
+; The main weave function
+
+(define (script-fu-weave img
+ drawable
+ ribbon-width
+ ribbon-spacing
+ shadow-darkness
+ shadow-depth
+ thread-length
+ thread-density
+ thread-intensity)
+ (gimp-context-push)
+ (gimp-image-undo-group-start img)
+
+ (let* (
+ (d-img (car (gimp-item-get-image drawable)))
+ (d-width (car (gimp-drawable-width drawable)))
+ (d-height (car (gimp-drawable-height drawable)))
+ (d-offsets (gimp-drawable-offsets drawable))
+
+ (weaving (create-complete-weave d-width
+ d-height
+ ribbon-width
+ ribbon-spacing
+ shadow-darkness
+ shadow-depth
+ thread-length
+ thread-density
+ thread-intensity))
+ (w-img (car weaving))
+ (w-layer (cadr weaving))
+ )
+
+ (gimp-context-set-paint-mode LAYER-MODE-NORMAL)
+ (gimp-context-set-opacity 100.0)
+ (gimp-context-set-feather FALSE)
+
+ (gimp-selection-all w-img)
+ (gimp-edit-copy w-layer)
+ (gimp-image-delete w-img)
+ (let ((floating-sel (car (gimp-edit-paste drawable FALSE))))
+ (gimp-layer-set-offsets floating-sel
+ (car d-offsets)
+ (cadr d-offsets))
+ (gimp-layer-set-mode floating-sel LAYER-MODE-MULTIPLY)
+ (gimp-floating-sel-to-layer floating-sel)
+ )
+ )
+ (gimp-context-pop)
+ (gimp-image-undo-group-end img)
+ (gimp-displays-flush)
+)
+
+(script-fu-register "script-fu-weave"
+ _"_Weave..."
+ _"Create a new layer filled with a weave effect to be used as an overlay or bump map"
+ "Federico Mena Quintero"
+ "Federico Mena Quintero"
+ "June 1997"
+ "RGB* GRAY*"
+ SF-IMAGE "Image to Weave" 0
+ SF-DRAWABLE "Drawable to Weave" 0
+ SF-ADJUSTMENT _"Ribbon width" '(30 0 256 1 10 1 1)
+ SF-ADJUSTMENT _"Ribbon spacing" '(10 0 256 1 10 1 1)
+ SF-ADJUSTMENT _"Shadow darkness" '(75 0 100 1 10 1 1)
+ SF-ADJUSTMENT _"Shadow depth" '(75 0 100 1 10 1 1)
+ SF-ADJUSTMENT _"Thread length" '(200 0 256 1 10 1 1)
+ SF-ADJUSTMENT _"Thread density" '(50 0 100 1 10 1 1)
+ SF-ADJUSTMENT _"Thread intensity" '(100 0 100 1 10 1 1)
+)
+
+(script-fu-menu-register "script-fu-weave"
+ "<Image>/Filters/Artistic")
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