Ticket #3217 (closed defect: wontfix)
AGG outputformat with palette, black transparency
|Reported by:||adube||Owned by:||aboudreault|
|Component:||MapServer C Library||Version:||5.4|
|Severity:||normal||Keywords:||palette, agg, outputformat, png, transparent|
|Cc:||aboudreault, sdlime, dmorissette|
When using the AGG/PNG driver with a palette and transparency turned on, instead of a transparent image I get a black background.
I already had this problem in the past but had no need for transparency so a simple workaround worked for me : a "dummy" layer containing a polygon that filled the whole map to cover the black background. But now, I need the image to be transparent to be able to use in OpenLayers, so the workaround won't do (since the outputted image with background never seems to be transparent).
I'll post a test case showing the problem very soon.