On Thu, Jan 27, 2011 at 7:26 PM, Joel Carranza <[email protected]> wrote:
> Hi all,
>
> I'm working with GeoServer (2.1-beta3) for the first time and attempting to
> display a raster weather layer via WMS. The layer displays fine but I would
> like to display the layer at reduced opacity, say 50%. I've created a new
> style based on the default "raster" style and modified the opacity value
> accordingly, then assigned the layer that default style.
>
> However, my raster does not appear translucent. The underlying raster layer
> has fully transparent pixels which display correctly, but the opaque part of
> my raster remains entirely opaque. I'm viewing the layer via WMS with a PNG
> format, and I've observed that the PNG is an 8-bit PNG with RGB channels
> only, no alpha channel, which is what would be required to display
> correctly. Does geoserver support writing out PNGs with RGBA?

Ah, this is a regression in the direct raster path... you should be able to
get it working, taking a toll in raster generation scalability and performance,
by disabling the direct raster path by passing to the JVM the following
system variable:
-Dorg.geoserver.render.raster.direct.disable=true

Don't remember if that flag was already available in RC1, but it's definitely
there in any nightly build.

Ah, also opened a jira to track this issue:
http://jira.codehaus.org/browse/GEOS-4337

Cheers
Andrea


-- 
Ing. Andrea Aime
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054  Massarosa (LU)
Italy

phone: +39 0584962313
fax:     +39 0584962313

http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.linkedin.com/in/andreaaime
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