[Geoserver-devel] [jira] (GEOS-4919) Support alpha transparency in png8 output

Andrea Aime created GEOS-4919:
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             Summary: Support alpha transparency in png8 output
                 Key: GEOS-4919
                 URL: https://jira.codehaus.org/browse/GEOS-4919
             Project: GeoServer
          Issue Type: Improvement
          Components: WMS
    Affects Versions: 2.1.3
            Reporter: Andrea Aime
            Assignee: Andrea Aime
             Fix For: 2.1.4

Current PNG8 output cannot handle per palette entry transparency, but only a bitmask approach. Yet png8 is fully capable of having a alpha channel for each palette entry, allowing for translucent images. Improve the quantizer code to support that.

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