Good initiative! I've been using OpenVG since the launch of the first Pi and GPU memory corruption was an issue then and now (Jessie Lite - RPi-2). My approach is similar to yours with a thin C++ wrapper library (including vector fonts) on top of the OpenVG API. Errors show up as damaged fonts (over...

I've also experienced GPU memory corruption and having debugged this for quite some time now I'm leaning towards a video core firmware issue (it seems to be more frequent when running on the RPi2 model). Symptom is that font glyphs become corrupted (after running for hours/days) and finally a functi...