[Mapserver-dev] Fix for broken pixmap transparency in 4.2 and 4.3 -> 4.2.4 release?

[Sean Gillies]

Hi all,

I've come up with a fix for the long standing bug regarding
the rendering of pixmaps with transparency onto RGB map images.

   http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=926

Commit is pending review by authors of mapdraw.c and mapgd.c.

This would make 6 significant bug fixes since 4.2.3, and I'd
like to request a 4.2.4 release before we get completely
occupied with the work of releasing 4.4.0.  Yes?

While looking into the map rendering code, it appears to me that
a nice feature for a future 5.0 release would be 7 bit alpha
support for vector layers.  Say, if a style's color was defined
like:

     COLOR 255 0 0 64

then the vectors would be rendered with ~50% transparency.

Sean

--
Sean Gillies
sgillies at frii dot com
http://users.frii.com/sgillies