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<div class="moz-cite-prefix">Thank you all for you replies.<br>
<br>
Well I agree with all the comments made here : ice lacks a whole
lot of things to replace Qgis rendering, and switching the
rendering backend might be a very complex and time consuming task
(that is almost the 1st thing I told Paolo). Moreover, Ice focuses
on being efficient for rendering : that means a whole bunch or
things are locked within Ice code (for instance, Ice takes care of
reading data from the hard drive).<br>
<br>
Still, if you are getting into pure OpenGl rendering someday, and
looking for responsive features, Ice can be a good source of
inspiration. it's not rocket science, just a few things to keep in
mind (in addition to tile caching and multi-resolution) : let the
GPU take care of everything it can, including all contrast changes
and reprojection, and avoid heavy operations (like HDD to RAM or
RAM to GPU transfert) whenever it is possible.<br>
<br>
It looks simple, but took me a while and a few tries with
Monteverdi previous rendering engines, which were not that good,
to come up with and combine all these ideas.<br>
<br>
<br>
Le 22/07/2015 21:26, Tim Sutton a écrit :<br>
</div>
<blockquote
cite="mid:F9645A26-8BBF-4921-ADD4-F1D3B6305214@kartoza.com"
type="cite">
<meta http-equiv="Context-Type" content="text/html; charset=utf-8">
Hi
<div class=""><br class="">
<blockquote type="cite" class="">On 22 Jul 2015, at 14:52, Paolo
Cavallini <<a moz-do-not-send="true"
href="mailto:cavallini@faunalia.it" class="">cavallini@faunalia.it</a>>
wrote:<br class="">
<br class="">
Il 22/07/2015 11:48, Julien Michel ha scritto:<br class="">
<blockquote type="cite" class="">Hi Qgis developers,<br
class="">
<br class="">
I wrote a small library called Ice which is able to render
raster (and<br class="">
</blockquote>
<br class="">
Hi all,<br class="">
I have seen ti in action during the recent FOSS4G, and I have
been<br class="">
really impressed by its speed and capabilities. I think it
would be a<br class="">
grat addition to QGIS, as either a main or alternative
renderer.<br class="">
</blockquote>
<div class=""><br class="">
</div>
<div class="">As nice as the idea is, I think it will be quite a
massive undertaking and we would break all the beautiful (ok
and ugly) cartography that people have come up with using the
rich array of rendering styles that QGIS currently has. I
would also like to see a native OpenGL renderer one day so
that we can start to thing about native 3D support. Maybe it
would be nice to make a patch that lets you swap between Qt
rendering backend and Ice, but honestly its probably a lot of
work and may just fade away like the old mapnick renderer did…</div>
<div class=""><br class="">
</div>
<div class="">Regards</div>
<div class=""><br class="">
</div>
<div class="">Tim</div>
<div class=""><br class="">
</div>
<br class="">
<blockquote type="cite" class="">All the best.<br class="">
<br class="">
-- <br class="">
Paolo Cavallini - <a moz-do-not-send="true"
href="http://www.faunalia.eu" class="">www.faunalia.eu</a><br
class="">
QGIS & PostGIS courses: <a moz-do-not-send="true"
href="http://www.faunalia.eu/training.html" class="">http://www.faunalia.eu/training.html</a><br
class="">
_______________________________________________<br class="">
Qgis-developer mailing list<br class="">
<a moz-do-not-send="true"
href="mailto:Qgis-developer@lists.osgeo.org" class="">Qgis-developer@lists.osgeo.org</a><br
class="">
<a class="moz-txt-link-freetext"
href="http://lists.osgeo.org/mailman/listinfo/qgis-developer">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br
class="">
</blockquote>
<br class="">
<div class=""><span>—</span><br class="">
<span><br class="">
</span><span><br class="Apple-interchange-newline">
<span><img id="3CABBD9A-0665-409C-A129-DEF4D232F5CC"
src="cid:part6.06070409.03010407@cnes.fr" class=""
height="66" width="160"></span>
<div class=""><br class="Apple-interchange-newline">
<br class="">
</div>
<div class="">Tim Sutton</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">Visit <a moz-do-not-send="true"
href="http://kartoza.com" class="">http://kartoza.com</a> to
find out about open source:</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">* Desktop GIS programming services</div>
<div class="">* Geospatial web development</div>
<div class="">* GIS Training</div>
<div class="">* Consulting Services</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">Skype: timlinux Irc: timlinux on #qgis
at <a moz-do-not-send="true"
href="http://freenode.net" class="">freenode.net</a></div>
<div class="">Tim is a member of the QGIS Project
Steering Committee</div>
<div class=""><br class="">
</div>
<div class="">Kartoza is a merger between Linfiniti
and Afrispatial</div>
</div>
</div>
</div>
</span></div>
<br class="">
</div>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Julien MICHEL
CNES - DCT/SI/AP - BPI 1219
18, avenue Edouard Belin
31401 Toulouse Cedex 09 - France
Tel: +33 561 282 894 - Fax: +33 561 283 109 </pre>
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