[Sugar-devel] Read Activity question (single page view)

[Tomeu Vizoso]

On Sun, Jul 5, 2009 at 22:16, Gary C Martin<gary at garycmartin.com> wrote:
> Hi Sayamindu,
>
> Saw some of your Read roadmap items today, and just wanted to ping and
> ask how viable you think it would be for Read to support a single page
> by page view for PDFs (rather than current continuous scrolling mode)?

I think it should be pretty easy. Check out 'pydoc evince' for
properties, methods, etc.

> I've been thinking it would be better for memory consumption
> (continuous scrolling has to have both pages rendered in memory as you
> scroll over page boundaries),

Not sure, I think evince pre-renders and caches several pages around
the current one. One of the issues is that it caches the whole pages
as pixmaps, and if the page is zoomed, that can mean huge pixmaps.

See "Tile based rendering" in http://live.gnome.org/Evince/Roadmap .

Regards,

Tomeu

> and also would be better for page by
> page reading for many books, presentations (Sameer Verma mentioned
> this in an IAEP mail today), and I'm working on some pdf materials
> like the old adventure book stories, where you traverse different
> pages in a non-linear way (works a bit like a point and click
> adventure/escape-the-room type thing).
>
> Does evince support single page render mode?
>
> If you think it's viable, but don't have the time yourself, let me
> know and I'll see if I can get something working here (never used
> evince myself so wanted to check with you first before I head off down
> a blind alley).
>
> Regards,
> --Gary
> _______________________________________________
> Sugar-devel mailing list
> Sugar-devel at lists.sugarlabs.org
> http://lists.sugarlabs.org/listinfo/sugar-devel
>