{"comment":{"created_at":"2011-10-11T16:01:20Z","body":"[springmeyer] migurski, can you advise as to whether this is still a problem? (I assume it is although Jon's recent color work and potentially the use of alpha halos might offer a workaround)\r\n\r\neither way, pushing to 0.7.0 because I don't see a attack plan on the horizon.","updated_at":"2011-10-11T16:01:20Z","url":"https://api.github.com/repos/artemp/mapnik/issues/comments/2365591","id":2365591,"user":{"avatar_url":"https://secure.gravatar.com/avatar/941f68386168a8a6b60f2529a7830af7?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","url":"https://api.github.com/users/artemp","id":59056,"login":"artemp"}},"action":"created","issue":{"number":166,"created_at":"2011-10-11T16:01:20Z","pull_request":{"diff_url":null,"patch_url":null,"html_url":null},"body":"When antialiased shapes (esp. text) are rendered to a transparent map, both the shape edge and alpha channel edges are treated identically. This causes thin, light-colored shapes to appear eroded (see attached image). An improvement would be to antialias RGB channels separately from the A channel, so that e.g. light colors would expand and bleed out to low-alpha areas. This does not appear to be a problem with dark colors, suggested that the default RGBA fill for a transparent map is 0x00000000.\r\n\r\nThe attached file is a composited image made up of a colored background and two separate Mapnik renders: black streets at 50% opacity, and white street names at 100% opacity. The eroded edge appearance can be seen on the white street names.","comments":1,"title":"Fix broken antialiasing + alpha with color bleed","updated_at":"2011-10-11T16:01:21Z","url":"https://api.github.com/repos/artemp/mapnik/issues/166","id":1877204,"assignee":null,"milestone":{"number":9,"created_at":"2011-10-11T15:50:23Z","due_on":"1970-01-01T09:21:03Z","title":"0.7.0","creator":{"avatar_url":"https://secure.gravatar.com/avatar/941f68386168a8a6b60f2529a7830af7?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","url":"https://api.github.com/users/artemp","id":59056,"login":"artemp"},"url":"https://api.github.com/repos/artemp/mapnik/milestones/9","open_issues":1,"closed_issues":4,"description":"= Mapnik 0.7.0 =\r\n\r\nThe 0.7.0 release targets stability and usability of the Mapnik Core and brings notable advancements to the Datasource Plugins.\r\n\r\nSee the Release page: wiki:Release0.7.0\r\n\r\nSee the CHANGELOG: source:tags/release-0.7.0/CHANGELOG\r\n\r\nUsage, either via Python or XML stylesheets should be fully compatible with the 0.6.x series.\r\n\r\nNevertheless, this release brings improvements and fixes to the C++ core that warrant a major release and new a ABI version.\r\n\r\n== Plugins ==\r\n\r\n * Addition of '''GDAL raster overviews''' - You can now rapidly read large raster datasets (#54)\r\n  * Turn multiple geotiffs into a Bigtiff and build overviews with gdaladdo then read with the GDAL plugin\r\n  * Thanks Alberto and Craig for the initial patches and Dražen for great testing\r\n\r\n * Huge set of improvements to '''PostGIS Plugin'''\r\n  * The PostGIS plugin now supports custom placement of the BBOX query\r\n  * It is is able to skip initialization queries if you supply the 'geometry_field','srid',or 'extent'\r\n  * Errors are now thrown for queries with invalid syntax - should help in debugging complex SQL\r\n  * Thanks Migurski, Lennard, Avar and more for great ideas and testing\r\n  * Thanks Robert for awesome support and patches\r\n  *  #242, #260,  #363, #376, #384, #393, #414, #415, #426,  #433, #434, #449, #456\r\n\r\n== Python ==\r\n * Additional support for '''python pickling''' (near complete) (#345)\r\n  * Map pickling still needs some refinement, but most objects are nicely pickleable now\r\n  * Thanks Artem for great improvements using templating\r\n\r\n * Improvements to '''Python linking''' on Mac OSX (#380)\r\n  * Smarter default linking to the right Python framework (helps if multiple versions exist like on Snow Leopard + python 2.6)\r\n\r\n * Improvements to python docstrings\r\n  * Thanks Igor for contributing many more docstrings!\r\n\r\n== Core ==\r\n * Completed adding full support for '''PPC/ Big endian''' systems (#357)\r\n  * Ability to read binary data was completed for 0.6.1, but color support needed work and is now finished\r\n\r\n * Large extension to '''TextSymbolizer''' functionality by David Eastcott (r1341) and Jochen (r1254)\r\n\r\n * New support for semitransparency in png256 output (#477)\r\n\r\n * New 'gamma' attribute on PolygonSymbolizer to allow for seamless polygon edges (#428)\r\n\r\n * Support for writing map '''xml to string''' (#396)\r\n  * Call `mapnik.save_map_to_string(m)` to send a map to an xml stream\r\n \r\n * Support for '''relative paths''' in xml loaded from string(#440)\r\n  * Works with libxml2 entities even! Thanks Dražen!\r\n  * Tested with the latest OSM stylesheet.\r\n\r\n * Variety of bug and usability fixes (#392,#436,#448,#242,#301,#402,#413)\r\n ","state":"open"},"closed_at":null,"user":{"avatar_url":"https://secure.gravatar.com/avatar/941f68386168a8a6b60f2529a7830af7?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","url":"https://api.github.com/users/artemp","id":59056,"login":"artemp"},"html_url":"https://github.com/artemp/mapnik/issues/166","labels":[{"name":"Agg_Renderer","url":"https://api.github.com/repos/artemp/mapnik/labels/Agg_Renderer","color":"FFFFFF"}],"state":"open"},"legacy":{"issue_id":1877204,"comment_id":2365591}}