Re: Another possible gb.poppler bug?

[Benoît Minisini <benoit.minisini@xxxxxxxxxxxxxxxx>]

Le 02/12/2025 à 16:55, gbWilly a écrit :
> On Tuesday, December 2nd, 2025 at 12:50, Claus Dietrich
> <claus.dietrich@xxxxxxxxxx> wrote:
>
> > Am 02.12.25 um 12:16 schrieb gbWilly:
> >
> > > The LibreOffice documents exported as pdf, do show thumbs in
> > > other pdfviewers, I have to self render them in my pdfviewer.
> >
> >
> > LibreOffice never generates thumbnails when exporting documents to
> > PDF and how do you know that the standard PDF viewers found
> > embedded thumbnails and display them instead of self rending?
>
> I don't, I thought I made that clear, it just SEEMS like they do
> because of the speed they load and render the thumbnails on the
> spot.
>
> As Gianluigi points out, if you self render a pdf with 1000 pages,
> it takes quite a while, might even hang on older systems, where
> other pdfviewers show thumbnails in a second (I presume also self
> rendered after all I read). So, in other pdfviewers they are fully
> rendered during the opening the file.
>
> Now, I can play a bit with when I render, to ensure the document is
> shown, before starting rendering the thumbs. But during rendering,
> even a timer object doesn't trigger, as the whole application seems
> to be caught up in the rendering. So showing the document first,
> gives some visible comfort to the user, but you can't do shit until
> the rendering is finished. Fact is that this self rendering is much
> slower than the self rendering other pdfviewers seem to be able to
> do.

Again, it's slow because you render all the thumbnails when opening the 
PDF, which is silly. You must render the thumbnails only when needed.

--
Benoît Minisini.