Re: Font rendering question - Apple Color Emoji.ttc

[Andrew Murray]

Hi,

Just following this up to make sure it isn’t forgotten. If it’s still in the 
to-do list and it’ll simply take time to look at it, no problem.

Thanks

> On 25 May 2024, at 5:26 PM, Andrew Murray <radarhere@gmail.com> wrote:
> 
> Hi,
> 
> Over at Python Pillow, a user has tried to render an emoji with macOS’ Apple 
> Color Emoji.ttc - 
> https://github.com/python-pillow/Pillow/issues/7854#issuecomment-2128088090. 
> The emoji is the combination of ‘woman’ U+1F469, 'zero width joiner’ U+200D, 
> 'manual wheelchair’ U+1F9BD, 'zero width joiner’ U+200D, 'black rightwards 
> arrow’ U+27A1, 'variation selector-16’ U+FE0F, with the intention of being a 
> woman in a manual wheelchair facing right.
> 
> However, FreeType returns an Unimplemented_Feature error. Interesting, it 
> only doesn’t do this for just a woman in a manual wheelchair. To demonstrate, 
> the following code attempts to use woman in a manual wheelchair, and then 
> woman in a manual wheelchair facing right. The error only occurs in the 
> second instance.
> 
> FT_Library library;
> FT_Init_FreeType(&library);
> FT_Face face = NULL;
> FT_New_Face(library, "/System/Library/Fonts/Apple Color Emoji.ttc", 0, &face);
> FT_Set_Pixel_Sizes(face, 0, 64);
> int error = FT_Load_Glyph(face, 1507, FT_LOAD_DEFAULT);
> if (error) {
>       printf("1507: error %d\n", error);
> }
> error = FT_Load_Glyph(face, 1508, FT_LOAD_DEFAULT);
> if (error) {
>       printf("1508: error %d\n", error);
> }
> 
> I’ve attached images that, as far as I can see, show that both indexes are 
> present in the font.
> 
> Any thoughts as to why one should fail but not the other would be 
> appreciated. Thanks.
> 
> <1507.png><1508.png>