[Nix-dev] [***SPAM***] Re: Emacs 24

[Ludovic Courtès]

Hello!

Florian Friesdorf <flo at chaoflow.net> skribis:

> doc-view with/without imagemagick
> ---------------------------------
>
> Viewing a pdf first with the imagemagick version, the optical result
> is bad (especially when zooming in). Opening/closing, navigating around
> does not change that.
>
> Viewing then without imagemagick, the optical result is good. Zooming in
> still yields nicely rendered vector fonts. Also emacs remembers the zoom
> level of the file (this is not the case with imagemagick).
>
> Now the weird part: opening with imagemagick again, the optical quality
> is the same as without it. It seems that previews were stored somewhere.
>
> @Ludo: any ideas? Where did you see performance differences?

There’s a cache under /tmp/docview$UID, so you should remove it before
comparing the optical quality.  It’s not clear to me why there’d be any
difference in terms of quality.

What I observed is that, before, you would see it convert the next few
pages while you’re reading (which could be seen in the modeline), and it
could take some time; each time you would zoom in or out, it would
possibly start again.  Now, it’s snappier: pages are rendered almost
instantaneously, even when zooming.

> Is emacs24 with or without imagemagick better (independent of size)?

We’d have to ask emacs-devel for more technical insight, I guess.

> In case of "with imagemagick", does it justify 81MB?

I think so, because ImageMagick is available in my store anyway.

Thanks,
Ludo’.