It’s similar for me; I can read the code (more or less), but writing it is rather difficult.
This means we would need some additional assistance here.
It’s worse because you also need to know opencl, not just C. And you have to understand how to program a GPU. However, there are lots of examples 
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Even though the current “starting point” is not ideal for a timely solution, a lot has been clarified here (for me), so I was able to better understand the background. Especially in relation to the approach to vector graphics compared to raster masks. Keyword: storage and also the (partial) lack of OpenCL support.
I would also like to take this opportunity to thank everyone for the peaceful and objective discussion 
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