On Wed, Sep 14, 2005 at 08:00:01PM +0200, Michael Schumacher wrote:
> IMO it could be a reasonable default to set tRNS to the currently
> selected background color when saving with "keep tranparent pixels'
> color" unset. This would copy the behaviour for the bKGD chunk.

Except that would make any pixels with the background color transparent in
any app that correctly parses tRNS.  I seriously doubt there is a good
automatic solution.


Computer Science is as much about computers as astronomy is about telescopes
        -- Edsger Wybe Dijkstra (1930-2002)

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