There are many SVG rasterizers out there. This one is okay:
https://en.wikipedia.org/wiki/Librsvg
Could just be that I'm a cross-platform guy, but it seems like most programs bypass the OS rasterization stack (rendering fonts/curves/polygons/etc. with open source libraries rather than native OS facilities, and sending the OS a finished bitmap). This choice probably addressed a mix of cross-platform consistency issues, as well as the lowest-common-denominator problem.