Script-fu unable to scale image after duplicating it

Question

The following is part of a larger Script-fu script that I am trying write.

I have run into a problem trying to duplicate .xcf file that is open and then scale it to some user specified dimension.

The following is what I though would work:

(define (my-duplicate-and-scale inImage inDrawable inWidth inHeight)
    (let* ((theDuplicateImage (gimp-image-duplicate inImage)))

        (gimp-image-scale theDuplicateImage inWidth inHeight)
    )
)

(script-fu-register
    "my-duplicate-and-scale"   ;func name
    "Duplicate and Scale ..."  ;menu label
    ""                         ;description
    ""                         ;author
    ""                         ;copyright notice
    ""                         ;date created
    "*"                        ;image type that the script works on
    SF-IMAGE    "Image"    0
    SF-DRAWABLE "Drawable" 0
    SF-VALUE    "Width"    "512"
    SF-VALUE    "Height"   "512"
)

(script-fu-menu-register "my-duplicate-and-scale" "<Image>/File/My")

When I execute the function I receive the following error:

Error while executing my-duplicate-and-scale:

Error: ( : 2) Invalid type for argument 1 to gimp-image-scale 

According to the Procedure Browser gimp-image-duplicate returns an IMAGE and the first parameter to gimp-image-scale is an IMAGE.

Answer 1

Try this code:

Replace:

(let* ((theDuplicateImage (gimp-image-duplicate inImage)))

with:

(let* ((theDuplicateImage (car (gimp-image-duplicate inImage))))