Re: PNG loading time

Dear Bruno and Philip,

On Wed, 11 Feb 2026, Bruno Voisin via tex-live wrote:
> >> On 10/02/2026 19:57, Hartmut Henkel via tex-live wrote:
> >>
> >> no, p_png.c from "PDFlib - A library for generating PDF on the fly",
> >> Copyright (c) 1997-2002 PDFlib GmbH and Thomas Merz.
> >>
> >> This file isn't openly available anymore, it seems.
> >
> > Could this<https://fossies.org/linux/PDFlib-Lite/libs/pdflib/p_png.c> (https://fossies.org/linux/PDFlib-Lite/libs/pdflib/p_png.c) be it, Hartmut ?

many thanks for your pointers to PDFlib, up to 9.1.

FWIW, there is also an unsecure webpage in Namibia,

  http://download.nust.na/pub2/openpkg1/sources/DST/pdflib/

which has collected PDFlib and PDFlib-Lite sources from 4.0.1 (as
consulted) up to PDFlib-Lite-7.0.0, still including p_png.c in a version
from 2009.

The p_png.c from 4.0.3 was not copied verbatim to pdftex, it was only
consulted for its nice fast inclusion idea and some code was gleaned.

BTW, google KI tells (fantasizes?) that there were some security
problems with this fast PNG inclusion approach.

Best Regards
Hartmut