; 210_watermark.scm
; last modified/tested by Paul Sherman [gimphelp.org]
; Wednesday, 07/15/2020 on GIMP 2.10.20
;==================================================
;
; Installation:
; This script should be placed in the user or system-wide script folder.
;
;	Windows 7/10
;	C:\Program Files\GIMP 2\share\gimp\2.0\scripts
;	or
;	C:\Users\YOUR-NAME\AppData\Roaming\GIMP\2.10\scripts
;	
;    
;	Linux
;	/home/yourname/.config/GIMP/2.10/scripts  
;	or
;	Linux system-wide
;	/usr/share/gimp/2.0/scripts
;
;==================================================
;
; 10/01/2008 - by Paul Sherman
; Modified to remove deprecated procedures
;
; 12/15/2008 - by Paul Sherman
; modified to merge watermark layer rather than flatten image
;
; 02/15/2014 - accommodate indexed images, add option to leave on separate layer
; add copyright symbol and added information about "Copyright text" script.
;
; LICENSE
;
;    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 <http://www.gnu.org/licenses/>.
;
;==============================================================
; Original information 
; 
; Write a watermark in a corner of the image
; script by Doug Reynolds
;==============================================================
(define (210-watermark 
		image 
		drawable 
		text 
		font 
		pixsize 
		location 
		opacity 
		inSeparate-layer
	)
	(gimp-image-undo-group-start image)
	(define indexed (car (gimp-drawable-is-indexed drawable)))
	(if (= indexed TRUE)(gimp-image-convert-rgb image))
	(let*
	;Save the foreground color
    ((old-fg (car (gimp-context-get-foreground))))
	;Set the foreground color to white
     (gimp-context-set-foreground '(255 255 255))
  (let*
	;Set the X and Y locations offset by 10 pixels from the chosen corner
     ((imagewid (car (gimp-image-width image)))
    	  (imagehgt (car (gimp-image-height image)))
    	  (ytext
        	 (cond ((<= location 1) (- (- imagehgt pixsize) 10))
            	   ((>= location 2) 0)))
    	  (textwid (car (gimp-text-get-extents-fontname text pixsize 0 font)))
    	  (xtext
        	 (cond ((= (fmod location 2) 0) 10)
            	   ((= (fmod location 2) 1) (- (- imagewid textwid) 10))))
		;Create a layer with the watermark text
    	(tlayer (car (gimp-text-fontname image -1 xtext ytext text -1 TRUE pixsize 0 font)))
	)
	;Bump map the watermark layer
    (plug-in-bump-map 1 image tlayer tlayer 135 45 3 0 0 0 0 1 0 0)
	;Set the opacity of the watermark layer
    (gimp-layer-set-opacity tlayer opacity)
	; Merge watermark layer with bottom layer
	  (if (= inSeparate-layer FALSE)(gimp-image-merge-down image tlayer 2))
    ); end let
	;Restore the old foreground color
    (gimp-context-set-foreground old-fg)
  )
	;Finish the undo group for the process
    (gimp-image-undo-group-end image) 
	;Update the display
	(gimp-displays-flush)
)
(script-fu-register "210-watermark"
	"Watermark"
	"Watermark on corner of your choice.\nNice transparent emboss effect.\n\nAlso allows choice of font, size and opacity.\n\nFor a watermark with more options, see \nSCRIPT-FU > PHOTO > COPYRIGHT TEXT"
	"Doug Reynolds"
	"Doug Reynolds"
	"2001/04/12"
	"*"
	SF-IMAGE 		"Input Image" 				0
	SF-DRAWABLE 	"Input Drawable" 			0
	SF-STRING 		"Text String" 				"\302\251Paul Sherman"
	SF-FONT 		"Font" 						"sans"
	SF-ADJUSTMENT 	"Size (pixels)" 			'(90 0 1000 5 10 0 1)
	SF-OPTION 		"Location" 					'("Lower left" "Lower right" "Upper left" "Upper right")
	SF-ADJUSTMENT 	"Opacity" 					'(20 0 100 5 10 0 1)
	SF-TOGGLE     	"Leave as separate layer?" 	FALSE
)
(script-fu-menu-register "210-watermark" "<Image>/Script-Fu")