Yes, cross-platform compatibility is a major problem.

Unfortunately, digital ink is a second class citizen in all browsers and all
operating systems. This has the unfortunate side-effect that digital ink
needs to be accessed via a different API on all three major platforms.
Xournal leaves all this API wrangling to GTK. In browsers, no such library
exists yet. The Wacom plugin only supports Mac and Windows and only Wacom
tablets.

Felix

2011/7/13 Jonathan R Young <jonathan...@gmail.com>

> **
> I completely agree about the pressure/subpixel aspects. Don't forget
> cross-platform ability too - Xournal started out as a Linux app
>
>
> On 13/07/11 09:16, Felix Breuer wrote:
>
> Hi Wouter!
>
> To me, the key feature of Xournal has always been subpixel precision. Along
> with presssure sensitivity, this is what makes handwriting in Xournal
> readable. I cannot produce readable handwriting in any of the HTML5 sketch
> apps I have seen so far.
>
> That said, I think there is great promise for an HTML5-based
> Journal/Sketch/Notepad app. The question is how to get the pen data
> (including pressure sensitivity and subpixel precision). There are two
> options AFAIK:
>
> 1) The Wacom Web Browser Plugin 
> (http://www.wacomeng.com/web/index.html)<http://www.wacomeng.com/web/index.html>works
>  reasonably well (and actually comes with a small sketch app as a
> demo). I have run into some trouble, though, regarding window focus, etc.
> and I do not know how actively Wacom maintains this plugin. Nonetheless I
> think this is the way to go.
>
> 2) The alternative is to hand-code bindings to e.g. the WinTab API using a
> foreign function interface to Javascript, such as JSctypes
> (https://wiki.mozilla.org/JSctypes <https://wiki.mozilla.org/JSctypes>).
> Of course, this would not work from within a webbrowser because of the
> security model, but a stand-alone app based on Xulrunner or Chromeless might
> work.
>
> As you can see I have a done a bit of research on this question (see also
> http://www.inkcode.net) but I have not started coding any HTML5-based
> sketch app yet. I do plan, however, to add some basic sketch functionality
> to my experimental text editor Qute (http://www.inkcode.net/qute-html5) in
> the future. Help would be very welcome! Conversely, I would be interested in
> contributing to a more Xournal-like HTML5 application.
>
> Cheers,
> Felix
>
>
> 2011/7/12 Wouter Geelen <wouter.gee...@gmail.com>
>
>> Anyone seen this chrome experiment?
>>
>>  http://www.chromeexperiments.com/detail/sketch/
>>
>>  http://hakim.se/experiments/html5/sketch/
>>
>>  We could use the code to port xournal to the web...
>>
>>
>> ------------------------------------------------------------------------------
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>>
>>
>
>
> --
> http://www.felixbreuer.net
>
>
> ------------------------------------------------------------------------------
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> Ries, the creator of the Lean Startup Methodology on "Lean Startup
> Secrets Revealed." This video shows you how to validate your ideas,
> optimize your ideas and identify your business 
> strategy.http://p.sf.net/sfu/appsumosfdev2dev
>
>
> _______________________________________________
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>
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> Ries, the creator of the Lean Startup Methodology on "Lean Startup
> Secrets Revealed." This video shows you how to validate your ideas,
> optimize your ideas and identify your business strategy.
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Ries, the creator of the Lean Startup Methodology on "Lean Startup 
Secrets Revealed." This video shows you how to validate your ideas, 
optimize your ideas and identify your business strategy.
http://p.sf.net/sfu/appsumosfdev2dev
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