If you (or anyone else, of course) are interested in really speeding up bitblt, it would likely be worth looking at the ARM specific speedups Ben Avison did for the PI. (Look in platforms/Cross/plugins/BitBltPlugin) and seeing if similar tricks could be done with the assorted media instructions in current i7 etc cpus.
tim -- tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim Experience is something you don't get until just after you need it.