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Re: 2.13.40 regtests

From: Han-Wen Nienhuys
Subject: Re: 2.13.40 regtests
Date: Fri, 26 Nov 2010 02:15:22 -0500

On Thu, Nov 25, 2010 at 12:45 PM, Phil Holmes <address@hidden> wrote:
> It wouldn't take me long to write a C# program (less than a day, I'd guess)
> that reproduced quite a lot of the regtest checker functionality and did a
> pixel-by-pixel check for image changes.  I've done the latter bit in about
> 20 minutes on the figured bass png that started this discussion.  The

It would take me about 10 seconds;  imagemagick has this functionality
built in (the same one that is used to generate the current images of
the regtest).


The reason I did not do it originally is that it moves the comparison
farther away from lilypond itself and pixel-per-pixel changes are not
calibrated for the size of the symbols: a large symbol moving place
will generate a much higher difference score than a small score.  It
might have been a quicker way to get started with running comparison

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

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