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List: openjdk-2d-dev
Subject: Re: [OpenJDK 2D-Dev] sun.java2D.Pisces renderer Performance and Memory enhancements
From: Laurent_Bourgès <bourges.laurent () gmail ! com>
Date: 2013-05-30 7:38:53
Message-ID: CAKjRUT7tzGALBXNDHx87KRHkkhPT5AU63Y_bPxoiXzkzBRom6g () mail ! gmail ! com
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Phil,
As I am currently working hard on improving pisces rendering engine
(performance and quality if possible), I am looking for interesting
algorithms, optimization tricks ... i.e. I need to study different
approaches (subpixel rendering, rasterizer, scanline renderer, coordinate
conversions).
I do not want openjdk to use AGG or cairo libs, but I wanted to know if AGG
was open source to be able (allowed) to look at their code to get new
ideas, tricks ...
I am still looking for volunteers to help me improving pisces code as only
Jim and Andrea participate to this topic and have some interest in
improving pisces.
Could someone explain me who maintains Java2D rendering engine and what is
the roadmap for new implementations (glg2d, jules using cairo ...) ?
Laurent
2013/5/29 Phil Race <philip.race@oracle.com>
> From http://www.oracle.com/**technetwork/community/oca-**486395.html<http://www.oracle.com/technetwork/community/oca-486395.html>
>
> "The OCA gives Oracle and the contributor joint copyright interests in the
> code ..."
>
> So you can't use AGG since you don't have the rights to contribute it under
> OCA terms.
>
> Also I don't think we want to swap out pisces and start to re-invent
> things.
> Better to improve what we already have
>
> -phil.
>
> On 5/29/2013 5:19 AM, Andrea Aime wrote:
>
> > On Wed, May 29, 2013 at 2:05 PM, Laurent BourgÄs <
> > bourges.laurent@gmail.com \
> > <mailto:bourges.laurent@gmail.**com<bourges.laurent@gmail.com>>> wrote:
> >
> > Seems very interesting ... I just looked at the documentation.
> >
> > AGG code would be worth to look at but somebody should check if
> > their license is compatible with openjdk license terms.
> >
> >
> > I'm not a lawyer, so take this with a grain of salt, but the most up to
> > date code base does not seem compatible, however
> > the lightweight rasterizer I pointed you at is under the LGPL, so it
> > _should_ be compatible.
> > I have memories that the rasterization techinique is coming from
> > libfreetype, so that's another one that might be worth
> > looking at (and I guess OpenJDK already depends on it to handle fonts
> > under Linux? not sure)
> >
> > Cheers
> > Andrea
> > --
> > ==
> > GeoServer training in Milan, 6th & 7th June 2013! Visit
> > http://geoserver.geo-**solutions.it <http://geoserver.geo-solutions.it> <
> > http://geoserver.geo-**solutions.it/ <http://geoserver.geo-solutions.it/>>
> > for more information.
> >
> > ==
> >
> > Ing. Andrea Aime
> > @geowolf
> > Technical Lead
> >
> > GeoSolutions S.A.S.
> > Via Poggio alle Viti 1187
> > 55054 Massarosa (LU)
> > Italy
> > phone: +39 0584 962313
> > fax: +39 0584 1660272
> > mob: +39 339 8844549
> >
> > http://www.geo-solutions.it
> > http://twitter.com/**geosolutions_it <http://twitter.com/geosolutions_it>
> >
> > ------------------------------**-------------------------
> >
>
>
[Attachment #3 (text/html)]
Phil,<br><br>As I am currently working hard on improving pisces rendering engine \
(performance and quality if possible), I am looking for interesting algorithms, \
optimization tricks ... i.e. I need to study different approaches (subpixel \
rendering, rasterizer, scanline renderer, coordinate conversions).<br> <br>I do not \
want openjdk to use AGG or cairo libs, but I wanted to know if AGG was open source to \
be able (allowed) to look at their code to get new ideas, tricks ...<br><br>I am \
still looking for volunteers to help me improving pisces code as only Jim and Andrea \
participate to this topic and have some interest in improving pisces.<br> <br>Could \
someone explain me who maintains Java2D rendering engine and what is the roadmap for \
new implementations (glg2d, jules using cairo ...) ?<br><br>Laurent<br><br><div \
class="gmail_quote">2013/5/29 Phil Race <span dir="ltr"><<a \
href="mailto:philip.race@oracle.com" \
target="_blank">philip.race@oracle.com</a>></span><br> <blockquote \
class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex">From <a \
href="http://www.oracle.com/technetwork/community/oca-486395.html" \
target="_blank">http://www.oracle.com/<u></u>technetwork/community/oca-<u></u>486395.html</a><br>
<br>
"The OCA gives Oracle and the contributor joint copyright interests in the code \
..."<br> <br>
So you can't use AGG since you don't have the rights to contribute it \
under<br> OCA terms.<br>
<br>
Also I don't think we want to swap out pisces and start to re-invent things.<br>
Better to improve what we already have<br>
<br>
-phil.<br>
<br>
On 5/29/2013 5:19 AM, Andrea Aime wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex"><div class="im"> On Wed, May 29, 2013 at 2:05 PM, \
Laurent BourgÄs <<a href="mailto:bourges.laurent@gmail.com" \
target="_blank">bourges.laurent@gmail.com</a> <mailto:<a \
href="mailto:bourges.laurent@gmail.com" \
target="_blank">bourges.laurent@gmail.<u></u>com</a>>> wrote:<br>
<br>
Seems very interesting ... I just looked at the documentation.<br>
<br>
AGG code would be worth to look at but somebody should check if<br>
their license is compatible with openjdk license terms.<br>
<br>
<br>
I'm not a lawyer, so take this with a grain of salt, but the most up to date code \
base does not seem compatible, however<br> the lightweight rasterizer I pointed you \
at is under the LGPL, so it _should_ be compatible.<br> I have memories that the \
rasterization techinique is coming from libfreetype, so that's another one that \
might be worth<br> looking at (and I guess OpenJDK already depends on it to handle \
fonts under Linux? not sure)<br> <br>
Cheers<br>
Andrea<br>
-- <br>
==<br></div>
GeoServer training in Milan, 6th & 7th June 2013! Visit <a \
href="http://geoserver.geo-solutions.it" \
target="_blank">http://geoserver.geo-<u></u>solutions.it</a> <<a \
href="http://geoserver.geo-solutions.it/" \
target="_blank">http://geoserver.geo-<u></u>solutions.it/</a>> for more \
information.<div class="im"> <br>
==<br>
<br>
Ing. Andrea Aime<br>
@geowolf<br>
Technical Lead<br>
<br>
GeoSolutions S.A.S.<br>
Via Poggio alle Viti 1187<br>
55054 Massarosa (LU)<br>
Italy<br>
phone: +39 0584 962313<br>
fax: +39 0584 1660272<br>
mob: +39 339 8844549<br>
<br>
<a href="http://www.geo-solutions.it" \
target="_blank">http://www.geo-solutions.it</a><br> <a \
href="http://twitter.com/geosolutions_it" \
target="_blank">http://twitter.com/<u></u>geosolutions_it</a><br> <br>
------------------------------<u></u>-------------------------<br>
</div></blockquote>
<br>
</blockquote></div><br>
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