I managed to render Arabic correctly with manual glyph substitution I tried to use ICU ArabicShaping.cpp also you need to change TTF font because Arabic Unicode range is not included in Slate falls back to LastResort.TFF font
I managed to render Arabic correctly with manual glyph substitution I tried to use ICU ArabicShaping.cpp also you need to change TTF font because Arabic Unicode range is not included in Slate falls back to LastResort.TFF font