[Qgis-user] OpenJPEG

[Aaron Boxer]

Hi Matthias,


Thanks - I suppose QGIS reads J2K files via GDAL ?

My improvements are :

- much faster tile decode (use multiple cores)
- much lower memory usage for decode
- fast sub-tile decode for large single-tile images


Eventually, I would like to enable viewing of files larger than 4 GB, which
is a limitation at the moment with OpenJPEG.

Cheers,
Aaron




On Mon, Jan 25, 2016 at 11:34 AM, Matthias Kuhn <matthias at opengis.ch> wrote:

> Hi Aaron,
>
> As far as I know QGIS does not directly link to openjpeg. It may be
> indirectly linked via Qt or some other library.
>
> What exactly are your improvements?
> Can they be provided upstream, so everything which depends on openjpeg can
> profit from them?
> Why do you think that QGIS in particular would benefit?
>
> Kind regards,
> Matthias
>
>
> On 01/25/2016 05:18 PM, Aaron Boxer wrote:
>
> Hello,
>
> I have made improvements to OpenJPEG speed and memory usage,
> and I am releasing the code under the Affero GPL license.
>
> Would QGIS users be interested in these patches?  These are significant
> improvements to existing OpenJPEG master.
>
> Thanks,
> Aaron
>
>
> _______________________________________________
> Qgis-user mailing listQgis-user at lists.osgeo.org
> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
> --
> Matthias Kuhn
> OPENGIS.ch - https://www.opengis.ch
> Spatial • (Q)GIS • PostGIS • Open Source
>
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20160125/1637c86a/attachment.html>