Gimp/plug-ins/script-fu/scripts/rendermap.scm

; Chris Gutteridge (cjg@ecs.soton.ac.uk)
; At ECS Dept, University of Southampton, England.

; 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.


(define (script-fu-render-map inSize
			      inGrain
			      inGrad
			      inWiden)
  (let* (
        (theWidth inSize)
        (theHeight inSize)
        (theImage (car (gimp-image-new theWidth theHeight RGB)))
        (theLayer)
        (thinLayer)
        )

  (gimp-context-push)

  (gimp-selection-all theImage)

  (set! theLayer (car (gimp-layer-new theImage theWidth theHeight
				      RGBA-IMAGE
				      "I've got more rubber ducks than you!"
				      100 NORMAL-MODE)))
  (gimp-image-add-layer theImage theLayer 0)
  (plug-in-solid-noise TRUE theImage theLayer 1 0 (rand 65536)
		       inGrain inGrain inGrain)

  (if (= inWiden 1)
      (begin
	(set! thinLayer (car (gimp-layer-new theImage theWidth theHeight
					     RGBA-IMAGE "Camo Thin Layer"
					     100 NORMAL-MODE)))
	(gimp-image-add-layer theImage thinLayer 0)

	(let ((theBigGrain (min 15 (* 2 inGrain))))
	  (plug-in-solid-noise TRUE theImage thinLayer 1 0 (rand 65536)
			       theBigGrain theBigGrain theBigGrain))

	(gimp-context-set-background '(255 255 255))
	(gimp-context-set-foreground '(0 0 0))

	(let ((theMask (car (gimp-layer-create-mask thinLayer 0))))
	  (gimp-layer-add-mask thinLayer theMask)

	  (gimp-edit-blend theMask FG-BG-RGB-MODE NORMAL-MODE
			   GRADIENT-LINEAR 100 0 REPEAT-TRIANGULAR FALSE
			   FALSE 0 0 TRUE
			   0 0 0 (/ theHeight 2)))

	(set! theLayer (car(gimp-image-flatten theImage)))))
	
  (gimp-selection-none theImage)
  (gimp-context-set-gradient inGrad)
  (plug-in-gradmap TRUE theImage theLayer)

  (gimp-display-new theImage)

  (gimp-context-pop)))

(script-fu-register "script-fu-render-map"
		    _"Render _Map..."
		    "Another pattern which resembles a map"
		    "Chris Gutteridge: cjg@ecs.soton.ac.uk"
		    "28th April 1998"
		    "Chris Gutteridge / ECS @ University of Southampton, England"
		    ""
		    SF-ADJUSTMENT _"Image size"       '(256 0 2048 1 10 0 0)
		    SF-ADJUSTMENT _"Granularity"      '(4 0 15 1 1 0 0)
		    SF-GRADIENT   _"Gradient"         "Land and Sea"
		    SF-TOGGLE     _"Gradient reverse" FALSE
		    SF-OPTION     _"Behaviour"        '(_"Tile"
							_"Detail in Middle"))

(script-fu-menu-register "script-fu-render-map"
			 _"<Toolbox>/Xtns/Script-Fu/Patterns")