[Qgis-developer] Incremental rendering of WMT-S tiles onto map canvas

[Jeremy Palmer]

Thanks Martin. Shall I raise a ticket to track this?


-----Original Message-----
From: Martin Dobias [mailto:wonder.sk at gmail.com]
Sent: Wednesday, 4 June 2014 9:36 p.m.
To: Jeremy Palmer
Cc: qgis-developer at lists.osgeo.org
Subject: Re: [Qgis-developer] Incremental rendering of WMT-S tiles onto map canvas

Hi Jeremy

On Wed, Jun 4, 2014 at 4:01 PM, Jeremy Palmer <JPalmer at linz.govt.nz> wrote:
> In QGIS 2.2 if you checked "Use render caching where possible to speed
> up redraws" in the rendering options WMT-S tiles were drawn
> immediately after download on the screen.  Under QGIS master this no
> longer happens - with or without MTR enabled
>
> Is it possible to get this feature back? It really improves usability for users and makes the application seem more responsive.

Yes, but unfortunately not for 2.4. I would like to address this in a future release. Previously the WMS provider used a trick for tiled
requests: if render caching was on, after some time it would return image even if it wasn't finished yet, keep downloading, and later request further redraws of canvas (which were cheap because other layers were cached already).

Regards
Martin

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