[OpenLayers-Dev] [Geoserver-devel] Are there png8 wms tile
problems with IE?
Andrea Aime
aaime at openplans.org
Fri Sep 21 10:33:19 EDT 2007
louvy.joseph at gmail.com ha scritto:
> I am cross posting this on both geoserver & openlayers lists..
>
> Recently I was enquiring if any of you have seen the exception issues
> with geoserver 1.5.3. I have further problems with 1.5.3, this time with
> PNG8.
>
> Is the png8 format rendered by geoserver-1.5.3 fully compliant with the
> PNG specs? Please ignore my lack of knowledge on PNG. Are there any
> limitations or certain features not being implemented for this png8
> format? I am using Openalyers 2.4 on the client side. Everything is fine
> on firefox. But both IE6 & IE7 have problems with the png8 produced by
> geoserver. This manifests in couple of ways:
>
> 1) Most of the times, the IE gets redirected to some other page when I
> use png8 format for openlayers wms layer. (If I use png instead of png8,
> everything is fine). I am hypothesizing that IE is not able to process
> the geoserver png8 and gets confused.
>
> 2) Lot of times with png8, the openlayers lands in
> OpenLayers.Util.onImageLoadError() handler. Basically IE thinks that
> there is some problem with image URL; however the IE ends up drawing the
> WMS content of the png8 tile fine (but the tile soon gets replaced by a
> pink tile). Looks like IE thinks that there is something wrong with this
> tile even though it was able to render it fine. The problem does not
> consistently happen with one particular tile; the same tile on refresh
> comes out fine.
I would be happy to investigate this, but I can't reproduce any of these
problems with the geoserver standard data set. If you can give me
a full set of data, requests and whatnot needed to reproduce these
errors I'll be happy to have a look at it.
Cheers
Andrea
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