Alternative pixel-based regtest checker

[Phil Holmes]

4 files attached. To try this out: create a new directory and place NoTagline.ly in it. Create a subdirectory called input and put some regtest files in there. Run MakeOldPix.sh. Make a change to lilypond. Run MakeNewPix.sh. Run ComparePix.sh. Om my tests there were some false alarms, but it seems a fairly simple way to make an alternative regtest checker.

Thoughts?

--
Phil Holmes

There's lots of improvements that could be made: parallelism, using something other than diff, but it basically works.

ComparePix.sh
Description: Binary data

MakeNewPix.sh
Description: Binary data

MakeOldPix.sh
Description: Binary data

\header { tagline = ##f }

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