Re: PNG loading time

Hartmut Henkel via tex-live <[email protected]> Tue, 17 Feb 2026 21:34:45 +0100 (CET)

Newsgroups	gmane.comp.tex.live
Message-ID	<[email protected]>

Hi Norbert,

On Tue, 17 Feb 2026, Norbert Preining wrote:
> > pixel graphics (\eg\ line scans, screenshots). As of \PDFTEX\ 1.30.0,
> > the alpha channel of \PNG\ images is processed if available; this allows
>
> ??? Is that true? The code in writepng.c does seem to remove the alpha
> channel? RGBA will normally also result in reencoding.

the alpha channel is active (with slow PNG embedding), just tried.

Best Regards, Hartmut