On 09/02/13 13:32, Judy Wilson wrote:
> First, let me say how much I have appreciated the help I've gotten
> throughout the years from this list! I'm a 70 year old woman living
> in Belize, my husband and I do websites (he's the programmer), I love
> the graphic aspect, though he's good at that, too. We have been
> open-source users and supporters for over 10 years, sponsored
> Software Freedom Day in Belize in 2006 and 2007. We use Ubuntu, GIMP,
> and Inkscape applications, he uses all kinds of programming
> languages, of course. Kudos to everyone contributing to this list and
> the open source movement.
>
> My question: I would like to put a "watermark" of my logo on images,
> and I can do so with the Map, Bump Map Filter. However, the location
> of the bump map is a problem. At 0 on the X and Y Offset sliders, it
> goes into the upper left hand corner. OK. The problem is the sliders
> only move to -1000, and my images are often larger than that, and I
> want to put the bump map into the lower right hand corner, and the
> sliders will not allow that. Typing in the numbers doesn't work, and
> moving the bump map in the preview with the middle mouse button
> doesn't work. Of course if I make the images smaller I can get it
> into the right hand lower corner, but I want to use the larger image.
> Any solution for this, or do I have to just live with this ...
> defect(?) for now. Thank you!
I can't address the bump map issue, but I've attached a script I
recently wrote to add a watermark to an image in the lower right corner.
I'm sure others have done similar things long ago but I've found it
useful; it can be used in batch mode or via the ui. Just stick it in
your .gimp-2.8/scripts folder. It will appear under "garya" on the main
menu bar; you probably will want to change that label :-) and the
default watermark file name/location.
Gary
; Script-fu (Scheme) script to add a watermark signature to an image
; Some constant names for debugging
; ORIENTATION-HORIZONTAL=0; ORIENTATION-VERTICAL=1
; RUN-INTERACTIVE=0; RUN-NONINTERACTIVE=1
; UTF-8 encoding=0; filename encoding=1
;
; Scale an image relative to another image
; Main application is for insertion of watermark
; I like copyright text to be 2% to 3% height of image
; Arguments:
; imgToScale The image to be scaled
; img The image relative to which imgToScale is to be scaled
; scaleFactor per cent of img height of the final scaled image
; Returns: the scaled image
; Scale factor is expressed as a percent of the "parent" image's size
(define (scale-relative imgToScale img scaleFactor)
; (display "scale-relative:\n")
; (display (string-append " scaleFactor:" (number->string scaleFactor) "\n"))
(let* (
(scaledLayer 0) ; the layer to be
scaled
(layer 0) ; the layer to
manipulate
; attributes and drawables from the original image
; (imgLayer (car (gimp-image-get-active-layer img))) ; layer from the
original image
(imgHt (car (gimp-image-height img))) ; primary image height
(imgWid (car (gimp-image-width img))) ; primary image width
(imgToScaleWid (car (gimp-image-width imgToScale))) ; width of image to
be scaled
(imgToScaleHt (car (gimp-image-height imgToScale))) ; height of image to
be scaled
; variables needed for scaling
(scaledHt 0) ; scale image height
(scaledWid 0) ; scale image width
(resultScaleFactor 0) ; scale factor for
layer to scale
)
; Compute scaled size
; Always scale relative to height
; scaledHeight = imageHeight * scaleFactor / 100
; scaleFactor = scaledHeight / imageToScaleHeight
(set! scaledHt (/ (* imgHt scaleFactor) 100))
; (display (string-append " imgToScaleHt:" (number->string imgToScaleHt) "\n"))
; (display (string-append " scaledHt:" (number->string scaledHt) "\n"))
(set! resultScaleFactor (/ scaledHt imgToScaleHt))
; (display (string-append " resultScaleFactor:" (number->string
resultScaleFactor) "\n"))
(set! scaledWid (* imgToScaleWid resultScaleFactor))
; (display (string-append " imgToScaleWid:" (number->string imgToScaleWid)
"\n"))
; (display (string-append " scaledWid:" (number->string scaledWid) "\n"))
; set to the best interpolation we can do and scale the image
(gimp-context-set-interpolation 3) ; set the
interpolation method to use
(gimp-image-scale imgToScale scaledWid scaledHt) ; scale the image
(display " scaledImage:") (print imgToScale)
imgToScale ; force the
return value
)
)
; Add watermark to an image
; Arguments:
; Name of file to process (xxx.tif, etc)
; Image to which watermark will be added
; Drawable, unused
; Name of file containing watermark (xxx.png, etc)
; Relative height (per cent) of watermark to original image
; Opacity of watermark
(define (add-watermark orgImg drw watermarkFileName relHt opacity)
; (display "\nadd-watermark\n")
; (display (string-append " fileName=\"" fileName "\"\n"))
; (display (string-append " watermarkFileName=\"" watermarkFileName "\"\n"))
; (display (string-append " relHt=\"" (number->string relHt) "\"\n"))
; (display (string-append " opacity=\"" (number->string opacity) "\"\n"))
(let* (
; (orgImg 0) ; original image
(watermarkImg 0) ; watermark image
(layer 0) ; the layer to
manipulate
; (multiplier (/ opacity 100)) ; opacity as a
decimal multiplier
(xOff (car (gimp-image-width orgImg))) ; x offset for
added watermark
(yOff (car (gimp-image-height orgImg))) ; y offset for
added watermark
)
; open the image and the watermark
; (set! orgImg (car (file-tiff-load RUN-NONINTERACTIVE fileName fileName)))
; load the original image
(set! watermarkImg (car (file-png-load RUN-NONINTERACTIVE watermarkFileName
watermarkFileName))) ; load the watermark image
; establish relative height for added image
(if (equal? relHt "")
(set! relHt "2")
)
(gimp-context-push)
(gimp-image-undo-group-start orgImg)
; scale the watermark image
; (display "watermarkImg:") (print watermarkImg)
; (display (string-append " ht:" (number->string (car (gimp-image-height
watermarkImg))) "\n"))
(scale-relative watermarkImg orgImg relHt)
; (display (string-append " ht:" (number->string (car (gimp-image-height
watermarkImg))) "\n"))
; set the opacity of the scaled image
; Note! 0 <= opacity <= 100, NOT 0 <= opacity <= 1 as noted in the
function definition
(set! layer (car (gimp-image-get-active-layer watermarkImg))) ; get the
layer (drawable) to modify
; (display "layers:") (print layer)
; (display (string-append " multiplier:" (number->string multiplier) "\n"))
(gimp-layer-set-opacity layer opacity)
; add the scaled image to the main image
(set! layer (car (gimp-layer-new-from-drawable layer orgImg)))
; (display "layer:") (print layer)
(gimp-image-insert-layer orgImg layer 0 0)
(gimp-layer-set-name layer "Copyright")
; position the scaled image in the lower right corner of the main image
; (display (string-append "xOff:" (number->string xOff)))
(set! xOff (- xOff (car (gimp-drawable-width layer))))
; (display (string-append " xOff:" (number->string xOff)))
(set! yOff (- yOff (car (gimp-drawable-height layer))))
; (display (string-append " yOff:" (number->string yOff)))
(gimp-layer-set-offsets layer xOff yOff);
(gimp-image-delete watermarkImg) ; get rid of the original
watermark image
(gimp-image-undo-group-end orgImg)
(gimp-displays-flush)
(gimp-context-pop)
; Need to save the modified image
; (gimp-image-delete orgImg) ; get rid of the original
image
)
)
; Register add-watermark
; NOTE!!! The script-fu browser will show an additional argument, SF-MODE,
which it automatically
; adds and removes in some crazy way.
; It appears to only be of significance when calling a non-script-fu procedure
from a script-fu,
; or vice-versa, and its purpose is to indicate whether or not the argument
dialog box should be displayed.
; So basically, for my purposes, it is of no significance whatsoever.
; SF-MODE "Mode" "RUN-INTERACTIVE" ; First arg is run mode
; NOTE!!! It also appears there is no way to use this procedure both
interactively and non-interactively,
; because of the need to specify the name of the input file for non-interactive
use.
; So note the additional procedure, batch-add-watermark
(script-fu-register
"add-watermark" ; function name
"Add Watermark..." ; menu label
"Adds a scaled, partially transparent image to an image"
"Gary Aitken" ; author
"Copyright 2013, Gary Aitken" ; copyright notice
"2013-08-28 v 0.1" ; date created
"" ; image type the script works
on
SF-IMAGE "Image" 0 ; image to which watermark will
be added
SF-DRAWABLE "Drawable" 0 ; unused
SF-STRING "Added image file" "/home/garya/Photos/Copyright.png" ;
file containing image to add
; SF-VALUE "Relative (percent) height of added image" "5" ; height
of scaled image as a percent of main image height
SF-ADJUSTMENT "Relative (percent) height of added image" '(3 1 100 1 10 1
0) ; height of scaled image as a percent of main image height
SF-ADJUSTMENT "Opacity of added image" '(50 1 100 1 10 1 0) ;
Opacity of scaled image
)
; "<Image>/garya" puts a top level menu item of "garya" on the menu bar for the
image window
(script-fu-menu-register "add-watermark" "<Image>/garya")
; (add-watermark
"/home/garya/Photos/Wildlife/Butterflies/Butterfly_PearlCrescent_0004_20130710.tif"
"/home/garya/Photos/Copyright.png" 2 70)
; add-watermark script for use from batch mode
(define (batch-add-watermark inFileName watermarkFileName outFileName relHt
opacity)
(let* (
(orgImg (car (gimp-file-load RUN-NONINTERACTIVE inFileName inFileName)))
(drw (car (gimp-image-get-active-layer orgImg)))
)
(add-watermark orgImg drw watermarkFileName relHt opacity)
(gimp-file-save RUN-NONINTERACTIVE orgImg drw outFileName outFileName)
(gimp-image-delete orgImg)
)
)
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