Restructure gcore/text module and fix memory leak #3221
Merged
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In this pr I restructure the thread local state for font shaping by combining the
FontContext
LayoutContext
and a hash map for reusing already registered fonts. We now implement most functions directly on this struct and provide wrapper methods to still expose a simple api.I did also break out the font -> bezpath conversion into its own file to reduce the conceptual scope of the files so the large diff is mostly code movement