Hi Sven -
Code snippet:
(while (< y height)
(gimp-rect-select inImage 0 0 width y
REPLACE FALSE 0) ; select some pixels
(gimp-edit-copy maskchannel) ; copy the selection
(gimp-selection-translate inImage 0 y) ; shift down
(gimp-floating-sel-anchor
(car
(gimp-edit-paste maskchannel FALSE))) ; and paste back
(set! y (+ y y)) ; move down by as much as we did
)
The snippet above no longer has the anomaly at y = 256; instead it's around y = 150.
The snippet below has the anomaly at y = 2 ^ n:
(while (< y height)
(gimp-rect-select inImage 0 0 width y
REPLACE FALSE 0) ; select some pixels
(gimp-edit-copy maskchannel) ; copy the selection
(gimp-selection-translate inImage 0 y) ; shift down
(gimp-floating-sel-anchor
(car
(gimp-edit-paste maskchannel TRUE))) ; and paste back
(set! y (+ y y)) ; move down by as much as we did
)
The location of the anomaly depends on the second argument to gimp-edit-paste, which I
don't really understand anyway.
The problem does not arise when the image's y dimension is a power of 2. (Or maybe
it's some multiple of the step size: the initial step I've been using has been 4).
To make life more interesting, I can't find it when the initial step size is 5.
I'll continue to research this and file a bug report when I can figure out what's
really going on.
--
--Jeff
Jeff Trefftzs <[EMAIL PROTECTED]>
http://www.tcsn.net/trefftzs Home Page
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