mirror of
https://gitlab.gnome.org/GNOME/gimp
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370 lines
11 KiB
Scheme
370 lines
11 KiB
Scheme
; The GIMP -- an image manipulation program
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; Copyright (C) 1995 Spencer Kimball and Peter Mattis
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;
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; Weave script --- make an image look as if it were woven
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; Copyright (C) 1997 Federico Mena Quintero
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; federico@nuclecu.unam.mx
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;
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; This program is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 2 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; if not, write to the Free Software
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; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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; Copies the specified rectangle from/to the specified drawable
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(define (copy-rectangle img drawable x1 y1 width height dest-x dest-y)
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(gimp-rect-select img x1 y1 width height REPLACE FALSE 0)
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(gimp-edit-copy img drawable)
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(let ((floating-sel (car (gimp-edit-paste img drawable FALSE))))
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(gimp-layer-set-offsets floating-sel dest-x dest-y)
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(gimp-floating-sel-anchor floating-sel))
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(gimp-selection-none img))
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; Creates a single weaving tile
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(define (create-weave-tile ribbon-width ribbon-spacing shadow-darkness shadow-depth)
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(let* ((tile-size (+ (* 2 ribbon-width) (* 2 ribbon-spacing)))
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(darkness (* 255 (/ (- 100 shadow-darkness) 100)))
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(img (car (gimp-image-new tile-size tile-size RGB)))
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(drawable (car (gimp-layer-new img tile-size tile-size RGB_IMAGE "Weave tile" 100 NORMAL))))
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(gimp-image-disable-undo img)
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(gimp-image-add-layer img drawable 0)
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(gimp-palette-set-background '(0 0 0))
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(gimp-edit-fill img drawable)
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; Create main horizontal ribbon
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(gimp-palette-set-foreground '(255 255 255))
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(gimp-palette-set-background (list darkness darkness darkness))
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(gimp-rect-select img
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0
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ribbon-spacing
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(+ (* 2 ribbon-spacing) ribbon-width)
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ribbon-width
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REPLACE
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FALSE
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0)
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(gimp-blend img
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drawable
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FG-BG-RGB
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NORMAL
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BILINEAR
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100
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(- 100 shadow-depth)
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REPEAT-NONE
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FALSE
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0
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0
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(/ (+ (* 2 ribbon-spacing) ribbon-width -1) 2)
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0
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0
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0)
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; Create main vertical ribbon
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(gimp-rect-select img
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(+ (* 2 ribbon-spacing) ribbon-width)
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0
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ribbon-width
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(+ (* 2 ribbon-spacing) ribbon-width)
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REPLACE
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FALSE
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0)
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(gimp-blend img
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drawable
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FG-BG-RGB
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NORMAL
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BILINEAR
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100
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(- 100 shadow-depth)
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REPEAT-NONE
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FALSE
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0
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0
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0
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(/ (+ (* 2 ribbon-spacing) ribbon-width -1) 2)
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0
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0)
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; Create the secondary horizontal ribbon
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(copy-rectangle img
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drawable
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0
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ribbon-spacing
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(+ ribbon-width ribbon-spacing)
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ribbon-width
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(+ ribbon-width ribbon-spacing)
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(+ (* 2 ribbon-spacing) ribbon-width))
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(copy-rectangle img
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drawable
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(+ ribbon-width ribbon-spacing)
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ribbon-spacing
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ribbon-spacing
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ribbon-width
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0
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(+ (* 2 ribbon-spacing) ribbon-width))
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; Create the secondary vertical ribbon
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(copy-rectangle img
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drawable
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(+ (* 2 ribbon-spacing) ribbon-width)
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0
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ribbon-width
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(+ ribbon-width ribbon-spacing)
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ribbon-spacing
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(+ ribbon-width ribbon-spacing))
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(copy-rectangle img
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drawable
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(+ (* 2 ribbon-spacing) ribbon-width)
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(+ ribbon-width ribbon-spacing)
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ribbon-width
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ribbon-spacing
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ribbon-spacing
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0)
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; Done
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(gimp-image-enable-undo img)
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(list img drawable)))
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; Creates a complete weaving mask
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(define (create-weave width height ribbon-width ribbon-spacing shadow-darkness shadow-depth)
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(let* ((tile (create-weave-tile ribbon-width ribbon-spacing shadow-darkness shadow-depth))
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(tile-img (car tile))
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(tile-layer (cadr tile))
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(weaving (plug-in-tile 1 tile-img tile-layer width height TRUE)))
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(gimp-image-delete tile-img)
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weaving))
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; Creates a single tile for masking
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(define (create-mask-tile ribbon-width ribbon-spacing
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r1-x1 r1-y1 r1-width r1-height
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r2-x1 r2-y1 r2-width r2-height
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r3-x1 r3-y1 r3-width r3-height)
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(let* ((tile-size (+ (* 2 ribbon-width) (* 2 ribbon-spacing)))
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(img (car (gimp-image-new tile-size tile-size RGB)))
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(drawable (car (gimp-layer-new img tile-size tile-size RGB_IMAGE "Mask" 100 NORMAL))))
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(gimp-image-disable-undo img)
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(gimp-image-add-layer img drawable 0)
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(gimp-palette-set-background '(0 0 0))
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(gimp-edit-fill img drawable)
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(gimp-rect-select img r1-x1 r1-y1 r1-width r1-height REPLACE FALSE 0)
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(gimp-rect-select img r2-x1 r2-y1 r2-width r2-height ADD FALSE 0)
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(gimp-rect-select img r3-x1 r3-y1 r3-width r3-height ADD FALSE 0)
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(gimp-palette-set-background '(255 255 255))
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(gimp-edit-fill img drawable)
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(gimp-selection-none img)
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(gimp-image-enable-undo img)
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(list img drawable)))
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; Creates a complete mask image
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(define (create-mask final-width final-height
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ribbon-width ribbon-spacing
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r1-x1 r1-y1 r1-width r1-height
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r2-x1 r2-y1 r2-width r2-height
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r3-x1 r3-y1 r3-width r3-height)
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(let* ((tile (create-mask-tile ribbon-width ribbon-spacing
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r1-x1 r1-y1 r1-width r1-height
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r2-x1 r2-y1 r2-width r2-height
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r3-x1 r3-y1 r3-width r3-height))
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(tile-img (car tile))
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(tile-layer (cadr tile))
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(mask (plug-in-tile 1 tile-img tile-layer final-width final-height TRUE)))
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(gimp-image-delete tile-img)
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mask))
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; Creates the mask for horizontal ribbons
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(define (create-horizontal-mask ribbon-width ribbon-spacing final-width final-height)
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(create-mask final-width
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final-height
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ribbon-width
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ribbon-spacing
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0
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ribbon-spacing
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(+ (* 2 ribbon-spacing) ribbon-width)
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ribbon-width
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0
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(+ (* 2 ribbon-spacing) ribbon-width)
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ribbon-spacing
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ribbon-width
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(+ ribbon-width ribbon-spacing)
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(+ (* 2 ribbon-spacing) ribbon-width)
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(+ ribbon-width ribbon-spacing)
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ribbon-width))
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; Creates the mask for vertical ribbons
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(define (create-vertical-mask ribbon-width ribbon-spacing final-width final-height)
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(create-mask final-width
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final-height
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ribbon-width
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ribbon-spacing
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(+ (* 2 ribbon-spacing) ribbon-width)
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0
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ribbon-width
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(+ (* 2 ribbon-spacing) ribbon-width)
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ribbon-spacing
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0
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ribbon-width
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ribbon-spacing
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ribbon-spacing
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(+ ribbon-width ribbon-spacing)
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ribbon-width
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(+ ribbon-width ribbon-spacing)))
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; Adds a threads layer at a certain orientation to the specified image
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(define (create-threads-layer img width height length density orientation)
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(let* ((drawable (car (gimp-layer-new img width height RGBA_IMAGE "Threads" 100 NORMAL)))
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(dense (/ density 100.0)))
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(gimp-image-add-layer img drawable -1)
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(gimp-palette-set-background '(255 255 255))
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(gimp-edit-fill img drawable)
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(plug-in-noisify 1 img drawable FALSE dense dense dense dense)
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(plug-in-c-astretch 1 img drawable)
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(cond ((eq? orientation 'horizontal)
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(plug-in-gauss-rle 1 img drawable length TRUE FALSE))
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((eq? orientation 'vertical)
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(plug-in-gauss-rle 1 img drawable length FALSE TRUE)))
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(plug-in-c-astretch 1 img drawable)
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drawable))
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(define (create-complete-weave width
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height
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ribbon-width
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ribbon-spacing
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shadow-darkness
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shadow-depth
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thread-length
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thread-density
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thread-intensity)
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(let* ((weave (create-weave width height ribbon-width ribbon-spacing shadow-darkness shadow-depth))
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(w-img (car weave))
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(w-layer (cadr weave))
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(h-layer (create-threads-layer w-img width height thread-length thread-density 'horizontal))
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(h-mask (car (gimp-layer-create-mask h-layer WHITE-MASK)))
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(v-layer (create-threads-layer w-img width height thread-length thread-density 'vertical))
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(v-mask (car (gimp-layer-create-mask v-layer WHITE-MASK)))
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(hmask (create-horizontal-mask ribbon-width ribbon-spacing width height))
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(hm-img (car hmask))
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(hm-layer (cadr hmask))
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(vmask (create-vertical-mask ribbon-width ribbon-spacing width height))
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(vm-img (car vmask))
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(vm-layer (cadr vmask)))
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(gimp-image-add-layer-mask w-img h-layer h-mask)
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(gimp-selection-all hm-img)
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(gimp-edit-copy hm-img hm-layer)
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(gimp-image-delete hm-img)
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(gimp-floating-sel-anchor (car (gimp-edit-paste w-img h-mask FALSE)))
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(gimp-layer-set-opacity h-layer thread-intensity)
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(gimp-layer-set-mode h-layer MULTIPLY)
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(gimp-image-add-layer-mask w-img v-layer v-mask)
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(gimp-selection-all vm-img)
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(gimp-edit-copy vm-img vm-layer)
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(gimp-image-delete vm-img)
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(gimp-floating-sel-anchor (car (gimp-edit-paste w-img v-mask FALSE)))
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(gimp-layer-set-opacity v-layer thread-intensity)
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(gimp-layer-set-mode v-layer MULTIPLY)
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; Uncomment this if you want to keep the weaving mask image
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; (gimp-display-new (car (gimp-channel-ops-duplicate w-img)))
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(list w-img
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(car (gimp-image-flatten w-img)))))
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; The main weave function
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(define (script-fu-weave img
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drawable
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ribbon-width
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ribbon-spacing
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shadow-darkness
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shadow-depth
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thread-length
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thread-density
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thread-intensity)
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(let* ((old-fg-color (car (gimp-palette-get-foreground)))
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(old-bg-color (car (gimp-palette-get-background)))
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(d-img (car (gimp-drawable-image drawable)))
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(d-width (car (gimp-drawable-width drawable)))
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(d-height (car (gimp-drawable-height drawable)))
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(d-offsets (gimp-drawable-offsets drawable))
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(weaving (create-complete-weave d-width
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d-height
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ribbon-width
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ribbon-spacing
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shadow-darkness
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shadow-depth
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thread-length
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thread-density
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thread-intensity))
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(w-img (car weaving))
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(w-layer (cadr weaving)))
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(gimp-selection-all w-img)
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(gimp-edit-copy w-img w-layer)
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(gimp-image-delete w-img)
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(let ((floating-sel (car (gimp-edit-paste d-img drawable FALSE))))
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(gimp-layer-set-offsets floating-sel
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(car d-offsets)
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(cadr d-offsets))
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(gimp-layer-set-mode floating-sel MULTIPLY)
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(gimp-floating-sel-to-layer floating-sel))
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(gimp-palette-set-foreground old-fg-color)
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(gimp-palette-set-background old-bg-color)
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(gimp-displays-flush)))
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; Register!
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(script-fu-register "script-fu-weave"
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"<Image>/Script-Fu/Alchemy/Weave"
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"Weave effect a la Alien Skin"
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"Federico Mena Quintero"
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"Federico Mena Quintero"
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"June 1997"
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"RGB*, GRAY*"
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SF-IMAGE "Image to weave" 0
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SF-DRAWABLE "Drawable to weave" 0
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SF-VALUE "Ribbon width" "30"
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SF-VALUE "Ribbon spacing" "10"
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SF-VALUE "Shadow darkness" "75"
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SF-VALUE "Shadow depth" "75"
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SF-VALUE "Thread length" "20"
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SF-VALUE "Thread density" "50"
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SF-VALUE "Thread intensity" "100")
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