Hey Chris, Thanks for the guess, setting transparent to 0 doesn't get rid of the issue, just makes the background default to white with full opacity.
I found the issue, I was setting PROCESSING=BILINEAR which apparently doesn't work well with partially transparent pixels. Going back to nearest seems to work fine. Thanks! Jason On Wed, Sep 16, 2009 at 7:20 PM, Chris Hodgson <[email protected]>wrote: > Just a guess but have you tried with transparent = 0? Just wondering if the > transparent mode rendering is somehow overriding the RGBA alpha mode > rendering? > > Chris > > Jason Beverage wrote: > >> Hi all, >> >> I'm serving up some raster imagery with an alpha band that contains >> partially transparent pixels using mapscript but when the image is rendered, >> the partially transparent portions (alpha between 5 and 10) come through >> completely opaque (alpha of 255). Areas that are fully opaque or fully >> transparent look fine. >> I'm using an output format with the GD/PNG renderer with a RGBA image mode >> and "transparent" set to true. I've tried using the AGG/PNG and GDAL/PNG >> renderers with the same result. >> >> C# code for the output format: >> map.outputformat.name <http://map.outputformat.name> = "PNG"; >> map.outputformat.driver = "GD/PNG"; >> map.outputformat.mimetype = "image/png"; >> map.outputformat.imagemode = (int)MS_IMAGEMODE.MS_IMAGEMODE_RGBA; >> map.outputformat.extension = "png"; >> map.outputformat.transparent = 1; >> >> Any ideas on what I'm doing wrong? >> >> Thanks, >> >> Jason >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> mapserver-users mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/mapserver-users >> >> > > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users >
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