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How to Display emojis in PDFs generated by FOP Apache

I am looking for a way to display as many characters (including emojis) as possible in PDFs generated by FOP Apache. The FOP people advise to use a font containing the emojis, but I tried NotoColorEmoji.ttf from Google and got an exception. I have also tried Symbola etc. but all fonts seem to be old and emojis separated by a a ZWJ (zero width joiner) don't work. I also tried Curier New, since it displays emojis correctly in Windows 10, but the ttf, does not contain emojis. The characters I need to display are as follows:

??ü

个相同基因的更多拷?来提?适应性

Πρωτ?τυπο κβαντικ? ραντ?ρ απ? ερευνητ?? στην Αυστρ?α

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The Exception when using NotoColorEmoji.ttf is as follows:

2021-01-27 15:19:18,104 ERROR Failed to read font file file:///C:/Roboto/Noto/NotoColorEmoji.ttf 'loca' table not found, happens when the font file doesn't contain TrueType outlines (trying to read an OpenType CFF font maybe?): java.io.IOException: 'loca' table not found, happens when the font file doesn't contain TrueType outlines (trying to read an OpenType CFF font maybe?)
question from:https://stackoverflow.com/questions/65925799/how-to-display-emojis-in-pdfs-generated-by-fop-apache

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