Yuri Astrakhan 9b112ae7b9

Implement dynamic font support /font/<name>/<start>-<end> (#755) ...

This implements dynamic font protobuf generation, allowing users to
request font ranges on the fly, and combining them in any order, e.g.
`Font1,Font2,Font3`, same as with sprites and tiles

This is a first iteration, without any multithreading support. In
theory, this could be done far faster by generating SDFs with multiple
threads.

### Current process
* during init, figure out all glyphs available in each font, and store
them as a bitset
* during request:
* combine requested bitsets to figure out which glyph should come from
which font file
* load those glyphs from files (using a single instance of the freetype
lib)
  * convert them to SDFs and package them into a protobuf

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Co-authored-by: Lucas <zhangyijunmetro@hotmail.com>

2023-10-28 05:10:48 +00:00

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