Our plan is to use a binary data description language to generate the (currently handwritten) font parsing code. We've been working for a while on yeslogic/ddl to this end, but it's taken some time to get to grips with what approach we want to take with it. It has however influenced the current way we've implemented the parsing which can be found in allsorts::binary.
We don't have to support parsing the entirety of OpenType just yet before we start making progress on this. Given enough features in the data description language we'll be able to parse certain subsets of the binary format before we try doing the entire thing. I think the minimum we'll need is:
Our plan is to use a binary data description language to generate the (currently handwritten) font parsing code. We've been working for a while on yeslogic/ddl to this end, but it's taken some time to get to grips with what approach we want to take with it. It has however influenced the current way we've implemented the parsing which can be found in
allsorts::binary.We don't have to support parsing the entirety of OpenType just yet before we start making progress on this. Given enough features in the data description language we'll be able to parse certain subsets of the binary format before we try doing the entire thing. I think the minimum we'll need is: