Re: Latest lilypond git master creating PDF 1.4 files instead of 1.7

[H. S. Teoh]

On Fri, Sep 10, 2021 at 02:22:50PM +0200, Jonas Hahnfeld wrote:
> Am Freitag, dem 10.09.2021 um 10:46 +0200 schrieb Valentin Petzel:
[...]
> > This is nothing new and an arbitrary decision by Lilypond, simply
> > because XeTeX defaults to 1.5 and thus produces error when embedding
> > a 1.7 PDF.
> > 
> > But this means that whatever problem you have should not come frome
> > the PDF CompatibilityLevel, as this did never change (and anyway a
> > lower version should only limit the amount of functionality but not
> > create a need for conversion).
> 
> It did intermittently change during the last development cycle after I
> mistakenly removed "CompatibilityLevel 1.4" and recent Ghostscript
> versions defaulted to 1.7. The old behavior was restored soon after to
> avoid the warnings from XeTeX mentioned above. If there is an
> advantage in using a newer compatibility level, it would be great if
> you could open an issue on GitLab with more details.
[...]

Hmm, upon further investigation, CompatibilityLevel isn't really the
problem after all. Lilypond 2.22.1 also produces files with
compatibility level 1.4, but it does not exhibit the same slowness. What
else has changed since 2.22.1?  Or could it possibly be some other
environmental issue like fonts / PDF libraries?


T

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