After failing to figure out run a debug build of FreeType and get the output, I started just investigating with print statements.
I found that the error is coming from https://gitlab.freedesktop.org/freetype/freetype/-/blob/master/src/sfnt/ttsbit.c?ref_type=heads#L1555 - the ‘graphicType’ tag that is unsupported is ‘flip’. This makes sense for 'woman in a manual wheelchair facing right’. The successful character on the other hand, 'woman in a manual wheelchair’, is has the graphic type ‘png ‘. So this is indeed a feature that FreeType doesn’t support. I gather from your response that this is not at all a priority. Should I create an issue this over at https://gitlab.freedesktop.org/freetype/freetype, or should I just leave it be? Alternatively, if I felt inspired, and somehow figured this out, would it be worthwhile for me to create a merge request? Thanks for your time. > On 9 Jun 2024, at 2:23 AM, Werner LEMBERG <w...@gnu.org> wrote: > > > Hello Andrew, > > > sorry for the late reply. > >> Over at Python Pillow, a user has tried to render an emoji with >> macOS’ Apple Color Emoji.ttc - > > I don't have this font. I only have the ancient `Apple Color > Emoji.ttf` version 8.0d7e1 from 2012... Without having that font I > can only do an educated guess. > >> https://github.com/python-pillow/Pillow/issues/7854#issuecomment-2128088090 > > Looking at this report it seems that somehow the image should be > mirrored horizontally – I guess this is the problem with FreeType. > > Please remember that color emoji rendering support within FreeType is > *very* limited and only partially implemented – it is *not* intended > as a general solution but rather as a last resort for people who won't > do the color bitmap blitting by themselves. > > Rendering support of Emojis is a border case, since FreeType is > decidedly *not* a graphics library. > >> [some C code omitted] > > You can get much more information if you do a debug build of FreeType, > then setting the environment variable > > FT2_DEBUG=any:7 > > and redirect the stderr output of your demo program to a file. > >> I’ve attached images that, as far as I can see, show that both >> indexes are present in the font. > > You haven't attached images, AFAICS. > > > Werner
