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GIMP Script-Fu Script | 2000-12-27 | 7.0 KB | 217 lines |
- ; The GIMP -- an image manipulation program
- ; Copyright (C) 1995 Spencer Kimball and Peter Mattis
- ;
- ; add-bevel.scm version 1.03
- ; Time-stamp: <1997-12-16 09:17:24 ard>
- ;
- ; 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
- ; 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, write to the Free Software
- ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- ;
- ; Copyright (C) 1997 Andrew Donkin (ard@cs.waikato.ac.nz)
- ; Contains code from add-shadow.scm by Sven Neumann
- ; (neumanns@uni-duesseldorf.de) (thanks Sven).
- ;
- ; Adds a bevel to an image. See http://www.cs.waikato.ac.nz/~ard/gimp/
- ;
- ; If there is a selection, it is bevelled.
- ; Otherwise if there is an alpha channel, the selection is taken from it
- ; and bevelled.
- ; Otherwise the whole image is bevelled.
- ;
- ; The selection is set on exit, so Select->Invert then Edit->Clear will
- ; leave a cut-out. Then use Sven's add-shadow for that
- ; floating-bumpmapped-texture cliche.
-
- ;
- ; 1.01: now works on offset layers.
- ; 1.02: has crop-pixel-border option to trim one pixel off each edge of the
- ; bevelled image. Bumpmapping leaves edge pixels unchanged, which
- ; looks bad. Oddly, this is not apparant in the GIMP - you have to
- ; save the image and load it into another viewer. First noticed in
- ; Nutscrape.
- ; Changed path (removed "filters/").
- ; 1.03: adds one-pixel border before bumpmapping, and removes it after.
- ; Got rid of the crop-pixel-border option (no longer reqd).
- ;
-
- ;
- ; BUMPMAP NOTES:
- ;
- ; Bumpmap changed arguments from version 2.02 to 2.03. If you use the
- ; wrong bumpmap.c this script will either bomb (good) or produce a
- ; naff image (bad).
- ;
- ; As distributed this script expects bumpmap 2.03 (shipped with Gimp 0.99.11)
- ; or later.
-
- ;
- ; BUGS
- ;
- ; Doesn't allow undoing the operation. Why not?
- ;
- ; Sometimes (and that's the scary bit) gives bogloads of GTK warnings.
- ;
-
-
- (define (script-fu-add-bevel img
- drawable
- thickness
- work-on-copy
- keep-bump-layer)
-
- (let* ((index 0)
- (bevelling-whole-image FALSE)
- (greyness 0)
- (thickness (abs thickness))
- (type (car (gimp-drawable-type-with-alpha drawable)))
- (image (if (= work-on-copy TRUE) (car (gimp-channel-ops-duplicate img)) img))
- (pic-layer (car (gimp-image-active-drawable image)))
- (width (car (gimp-drawable-width pic-layer)))
- (height (car (gimp-drawable-height pic-layer)))
- (old-bg (car (gimp-palette-get-background)))
- (bump-layer (car (gimp-layer-new image
- width
- height
- GRAY
- "Bumpmap"
- 100
- NORMAL)))
- )
- ;
- ; If the layer we're bevelling is offset from the image's origin, we
- ; have to do the same to the bumpmap
- (let ((offsets (gimp-drawable-offsets pic-layer)))
- (gimp-layer-set-offsets bump-layer (car offsets) (cadr offsets))
- )
-
- (gimp-image-undo-disable image)
-
- ;------------------------------------------------------------
- ;
- ; Set the selection to the area we want to bevel.
- ;
- (if (eq? 0 (car (gimp-selection-bounds image)))
- (begin
- (set! bevelling-whole-image TRUE) ; ...so we can restore things properly, and crop.
- (gimp-image-resize image (+ width 2) (+ height 2) 1 1)
- (if (not (eq? 0 (car (gimp-drawable-has-alpha pic-layer)))) ; Wish I knew Scheme
- (gimp-selection-layer-alpha pic-layer)
- (begin
- (gimp-selection-all image)
- )
- )
- )
- )
-
- ; Store it for later.
- (set! select (car (gimp-selection-save image)))
- ; Try to lose the jaggies
- (gimp-selection-feather image 2)
-
- ;------------------------------------------------------------
- ;
- ; Initialise our bumpmap
- ;
- (gimp-palette-set-background '(0 0 0))
- (gimp-drawable-fill bump-layer BG-IMAGE-FILL)
-
- (set! index 1)
- (while (< index thickness)
- (set! greyness (/ (* index 255) thickness))
- (gimp-palette-set-background (list greyness greyness greyness))
- ;(gimp-selection-feather image 1) ;Stop the slopey jaggies?
- (gimp-bucket-fill bump-layer BG-BUCKET-FILL NORMAL 100 0 FALSE 0 0)
- (gimp-selection-shrink image 1)
- (set! index (+ index 1))
- )
- ; Now the white interior
- (gimp-palette-set-background '(255 255 255))
- (gimp-bucket-fill bump-layer BG-BUCKET-FILL NORMAL 100 0 FALSE 0 0)
-
- ;------------------------------------------------------------
- ;
- ; Do the bump.
- ;
- (gimp-selection-none image)
-
- ; To further lessen jaggies?
- ;(plug-in-gauss-rle 1 image bump-layer thickness TRUE TRUE)
-
-
- ; If they're working on the original, let them undo the filter's effects.
- ; This doesn't work - ideas why not?
- (if (= work-on-copy FALSE) (gimp-image-undo-enable image))
-
- ;
- ; BUMPMAP INVOCATION:
- ;
- ; Use the former with version 2.02 or earlier of bumpmap:
- ; Use the latter with version 2.03 or later (ambient and waterlevel params)
- ; (plug-in-bump-map 1 image pic-layer bump-layer 125 45 3 0 0 TRUE FALSE 1)
- (plug-in-bump-map 1 image pic-layer bump-layer 125 45 3 0 0 0 0 TRUE FALSE 1)
-
- ;
- ; Shave one pixel off each edge
- ;
- (if (= bevelling-whole-image TRUE)
- (gimp-crop image width height 1 1)
- )
-
- (if (= work-on-copy FALSE) (gimp-image-undo-disable image))
-
- ;------------------------------------------------------------
- ;
- ; Restore things
- ;
- (gimp-palette-set-background old-bg)
- (if (= bevelling-whole-image TRUE)
- (gimp-selection-none image) ; No selection to start with
- (gimp-selection-load select)
- )
- ; If they started with a selection, they can Select->Invert then
- ; Edit->Clear for a cutout.
-
- ; clean up
- (gimp-image-remove-channel image select)
- (if (= keep-bump-layer TRUE)
- (begin
- (gimp-image-add-layer image bump-layer 1)
- (gimp-layer-set-visible bump-layer 0))
- (gimp-layer-delete bump-layer)
- )
-
- (gimp-image-set-active-layer image pic-layer)
-
- (if (= work-on-copy TRUE) (gimp-display-new image))
-
- (gimp-image-undo-enable image)
- (gimp-displays-flush)
-
- )
- )
-
- (script-fu-register "script-fu-add-bevel"
- _"<Image>/Script-Fu/Decor/Add Bevel..."
- "Add a bevel to an image"
- "Andrew Donkin <ard@cs.waikato.ac.nz>"
- "Andrew Donkin"
- "1997/11/06"
- "RGB* GRAY*"
- SF-IMAGE "Image" 0
- SF-DRAWABLE "Drawable" 0
- SF-ADJUSTMENT _"Thickness" '(5 0 30 1 2 0 0)
- SF-TOGGLE _"Work on Copy" TRUE
- SF-TOGGLE _"Keep Bump Layer" FALSE
- )
-