<div dir="ltr"><div>Hi Matthias,<br><br><br></div><div>Thanks - I suppose QGIS reads J2K files via GDAL ? <br><br></div><div>My improvements are :<br><br></div><div>- much faster tile decode (use multiple cores)<br></div><div>- much lower memory usage for decode<br></div><div>- fast sub-tile decode for large single-tile images<br><br><br></div><div>Eventually, I would like to enable viewing of files larger than 4 GB, which is a limitation at the moment with OpenJPEG.<br><br></div><div>Cheers,<br></div><div>Aaron<br></div><div><br></div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jan 25, 2016 at 11:34 AM, Matthias Kuhn <span dir="ltr"><<a href="mailto:matthias@opengis.ch" target="_blank">matthias@opengis.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Hi Aaron,<br>
<br>
As far as I know QGIS does not directly link to openjpeg. It may be
indirectly linked via Qt or some other library.<br>
<br>
What exactly are your improvements?<br>
Can they be provided upstream, so everything which depends on
openjpeg can profit from them?<br>
Why do you think that QGIS in particular would benefit?<br>
<br>
Kind regards,<br>
Matthias<div><div class="h5"><br>
<br>
<div>On 01/25/2016 05:18 PM, Aaron Boxer
wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">
<div>
<div>Hello,<br>
</div>
<br>
I have made improvements to OpenJPEG speed and memory usage,<br>
</div>
<div>and I am releasing the code under the Affero GPL license. <br>
<br>
</div>
<div>Would QGIS users be interested in these patches? These are
significant<br>
</div>
<div>improvements to existing OpenJPEG master.<br>
<br>
</div>
<div>Thanks,<br>
</div>
<div>Aaron <br>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
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<pre cols="72">--
Matthias Kuhn
OPENGIS.ch - <a href="https://www.opengis.ch" target="_blank">https://www.opengis.ch</a>
Spatial • (Q)GIS • PostGIS • Open Source</pre>
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