artemp/trac2github — Issue #760: Incorrect blending of rasters with alpha channel
Author: artemp
Created: 2011-10-09 20:50:00+00:00
State: open
Labels: Core_Library

Mapnik doesn't blend the alpha channel of raster images properly with the background. Attached is a test case which reproduces the issue (I will try to integrate it into the mapnik test suite later today).

This ticket is a dupe of #758 but isolates the issue to just the raster symbolizer, not the raster colorizer.

Alberto