[Qgis-developer] Patch Proposal #1974 Render caching

Marco Hugentobler marco at hugis.net
Sat Oct 24 07:34:01 EDT 2009


Hi Tim

Wow, this is really cool and speeds up rendering in many situations.

Now that every layer has its QImage to paint on, it might be a possibility to 
render each in its own thread and have great performance on todays quad core 
machines.

Regards,
Marco

Am Samstag, 24. Oktober 2009 00.41:39 schrieb Tim Sutton:
> Hi Devs
>
> I've been working a little on implementing some render caching to make
> QGIS feel more responsive and avoid unnecessary re-rendering of layers
> when nothing has really changed.
>
> I've finished writing a simple caching mechanism and would like to ask
> you to a) test and b) indicate if you are happy for this to go into trunk.
>
> The patch is here
>
> https://trac.osgeo.org/qgis/attachment/ticket/1974/qgis_rendercachepatch_v7
>_23Oct2009.diff
>
> Note that caching is disabled by default - you need to enable it in the
> Options dialog, rendering tab.
>
>
> Regards,

-- 
Dr. Marco Hugentobler
HUGIS - GIS programming and consulting
Honrainweg 5
CH-8038 Zürich
marco at hugis.net
http://homepage.hispeed.ch/hugis/


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