[libGD] #42 [Comment added] GD can't display characters with unicode references over 7 digits (Attachment added)

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FS#42 - GD can't display characters with unicode references over 7 digits
User who did this - Adam Harvey (LawnGnome)

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An updated version (no changes other than unbitrotting) of Pierre's patch from 2007 against the current HEAD is attached as gdft_fix_selectcharmap.patch. It seems to do the right thing for astral characters, but I suspect it'll fail badly if Big5 or SJIS encodings are requested, since it's hard-coded at present to try to select a charmap with FT_ENCODING_UNICODE, rather than using whatever's requested.

I've also hacked up my own, more minimal patch (attached as gdft_astral_minimal.patch), which (hopefully) maintains the current behaviour when Big5 or SJIS encoding is requested, but hacks up the existing UTF-8 function to add four byte UTF-8 codepoint support rather than doing it properly. Since I have neither a Big5 nor SJIS font to test this with, I can't guarantee that it's right, but I can't see why it wouldn't be.

I suspect the right answer is probably a combination of the two -- that is, using Pierre's rewritten UTF-8 handling code with my changes to gdImageStringFTEx -- but it's late and I'm going to bed, so let's just consider the two patches for now and I'll think about it more next time I have a free evening. :)
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