ras_type         1488 librender/agg/Renderer_agg.cpp typedef agg::rasterizer_compound_aa<agg::rasterizer_sl_clip_int> ras_type;
ras_type         1709 librender/agg/Renderer_agg.cpp typedef agg::rasterizer_scanline_aa<> ras_type; 
ras_type         1820 librender/agg/Renderer_agg.cpp typedef agg::rasterizer_scanline_aa<> ras_type;