Home page logo
/

bugtraq logo Bugtraq mailing list archives

Re: Gimp: Erased sections of images print in some cases
From: Robert Bihlmeyer <robbe () orcus priv at>
Date: Wed, 30 Oct 2002 11:42:26 +0100 (CET)

Clark Mills <c.mills () auckland ac nz> writes:

    http://c-mills.ctru.auckland.ac.nz/transparent.png

If you view this image from Linux in Galeon 1.2.6 or Netscape/7.0
all looks fine however if you print the image from within these
applications then the _erased_ section prints as if it was never
erased.

Cute. pngtopnm will also uncover the "erased" area. Gimp's eraser
simply modifies the alpha channel, leaving RGB channels intact. If
something later sets transparency to zero (e.g. because the output
device/format doesn't support it), the original data appears
again. Something to keep in mind.

I let the Gimp people know this but they replied considering it a
feature not a bug which could be the case in some/most
circumstances, Bug #97167.

Perhaps it should be an option to the eraser to clear RGB as well.

FWIW, my Gimp (1.2.3) has ">Image>Alpha>Clear Alpha..." which will do
that for the whole layer/image. It is a standard gimp-perl plugin,
apparently.

-- 
Robbe


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault