[AGG] Gaps in the lightweight rasterizer

[Lost M. W. <web...@lo...>]

Hi, I'm using the lightweight rasterizer component of AGG, and I'm 
experiencing "gaps" between shapes. Below are a couple pictures that 
illustrate what I mean.

First, you can see the gaps easily here:
http://www.ottoproject.com/agg_rasterizer_gaps/solid_black.jpg

This second picture shows how the crosses are made - a central square 
surrounded by four rectangles:
http://www.ottoproject.com/agg_rasterizer_gaps/false_colors.jpg

Of course, the solution for a shape like this cross would be to make it 
one single shape, instead of multiple shapes lined up. However, my 
concern is not this cross shape specifically, but the general case of 
two polygons that share an edge. Is there any way to prevent such gaps 
from appearing between them?

Thanks for any help.