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selection-round.scm
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;; selection-rounded-rectangle.scm -*-scheme-*-
;; GIMP - The GNU Image Manipulation Program
;; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;;
;; 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.
;; CHANGE-LOG:
;; 1.00 - initial release
;; 1.01 - some code cleanup, no real changes
;; 1.02 - made script undoable
;; 2.00 - ALAN's Branch. changed name, menu, location, and description
;; 2.01 - fixed to work if there was no current selection.
;; 2.02 - changed scale to percentages, usability tweaking.
;; 2.10 - added concave round edges, updated description.
;; 2.11 - tweeked description, changed comments, relinquished any rights.
;; Copyright (C) 1997, 1998, Sven Neumann
;; Copyright (C) 2004, Alan Horkan.
;; Alan Horkan relinquishes all rights to his changes,
;; full ownership of this script belongs to Sven Neumann.
(define (script-fu-selection-rounded-rectangle image drawable radius concave)
(gimp-image-undo-group-start image)
(if (= (car (gimp-selection-is-empty image)) TRUE) (gimp-selection-all image))
(let* (
(radius (/ radius 100)) ; convert from percentages
(radius (min radius 1.0))
(radius (max radius 0.0))
(select-bounds (gimp-selection-bounds image))
(has-selection (car select-bounds))
(select-x1 (cadr select-bounds))
(select-y1 (caddr select-bounds))
(select-x2 (cadr (cddr select-bounds)))
(select-y2 (caddr (cddr select-bounds)))
(select-width (- select-x2 select-x1))
(select-height (- select-y2 select-y1))
(cut-radius 0)
(ellipse-radius 0)
)
;; select to the full bounds of the selection,
;; fills in irregular shapes or holes.
(gimp-rect-select image
select-x1 select-y1 select-width select-height
CHANNEL-OP-ADD FALSE 0)
(if (> select-width select-height)
(set! cut-radius (trunc (+ 1 (* radius (/ select-height 2)))))
(set! cut-radius (trunc (+ 1 (* radius (/ select-width 2)))))
)
(set! ellipse-radius (* cut-radius 2))
;; cut away rounded (concave) corners
; top right
(gimp-ellipse-select image
(- select-x1 cut-radius)
(- select-y1 cut-radius)
(* cut-radius 2)
(* cut-radius 2)
CHANNEL-OP-SUBTRACT
TRUE
FALSE 0)
; lower left
(gimp-ellipse-select image
(- select-x1 cut-radius)
(- select-y2 cut-radius)
(* cut-radius 2)
(* cut-radius 2)
CHANNEL-OP-SUBTRACT
TRUE
FALSE 0)
; top right
(gimp-ellipse-select image
(- select-x2 cut-radius)
(- select-y1 cut-radius)
(* cut-radius 2)
(* cut-radius 2)
CHANNEL-OP-SUBTRACT
TRUE
FALSE 0)
; bottom left
(gimp-ellipse-select image
(- select-x2 cut-radius)
(- select-y2 cut-radius)
(* cut-radius 2)
(* cut-radius 2)
CHANNEL-OP-SUBTRACT
TRUE
FALSE 0)
;; add in rounded (convex) corners
(if (= concave FALSE)
(begin
(gimp-ellipse-select image
select-x1
select-y1
ellipse-radius
ellipse-radius
CHANNEL-OP-ADD
TRUE
FALSE 0)
(gimp-ellipse-select image
select-x1
(- select-y2 ellipse-radius)
ellipse-radius
ellipse-radius
CHANNEL-OP-ADD
TRUE
FALSE 0)
(gimp-ellipse-select image
(- select-x2 ellipse-radius)
select-y1
ellipse-radius
ellipse-radius
CHANNEL-OP-ADD
TRUE
FALSE 0)
(gimp-ellipse-select image
(- select-x2 ellipse-radius)
(- select-y2 ellipse-radius)
ellipse-radius
ellipse-radius
CHANNEL-OP-ADD
TRUE
FALSE 0)
)
)
(gimp-image-undo-group-end image)
(gimp-displays-flush)
)
)
(define (script-fu-selection-round image drawable radius)
(script-fu-selection-rounded-rectangle image drawable (* radius 100))
)
(script-fu-register "script-fu-selection-rounded-rectangle"
_"Rounded R_ectangle..."
_"Round the corners of the current selection"
"Alan Horkan, Sven Neumann" ; authors
"Sven Neumann" ; copyright
"2004/06/07"
"*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT _"Radius (%)" '(50 0 100 1 10 0 0)
SF-TOGGLE _"Concave" FALSE
)
(script-fu-register "script-fu-selection-round"
""
"Round the corners of the current selection (deprecated, use Rounded Rectangle)"
"Sven Neumann" ; authors
"Sven Neumann" ; copyright
"1998/02/06"
"*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT "Relative radius" '(1 0 128 0.1 1 1 1)
)
(script-fu-menu-register "script-fu-selection-rounded-rectangle"
"<Image>/Select/Modify")