FreeType: Issues with Colored Fonts

[ghost]

Player platform:

Windows, Android

Describe the issue in detail and how to reproduce it:

Windows:
Using colored fonts results in the following error:

Debug: Couldn't load FreeType character 0x1f4d0
Error: Broken color font for glyph 0x1f4d0

Android:
The font is completely ignored (although during startup, you can see that the console no longer prompts that the font was not found).

On Windows, I have tried other fonts (such as Google Noto), but the same issue occurred. Below are the main test fonts I used.

Attach files

Font.ttf.zip

I wrote a script to convert Minecraft's emojipack into TTF. See ttf_cbdt_mc_create.py.

Although the font works properly on the player versions for macOS, web, and Linux, I do not rule out the possibility of a data format error.

[jetrotal]

Windows can't open font.ttf, it tells that it's not a valid font file.

[ghost]

I have been troubled by the font's data definition for a long time, and I still don't understand it. The current Font.ttf likely has many errors because I completely ignored the relationships between each field and only know that it can render in some Player builds.

[Ghabry]

I had exactly the same problem when trying to understand colour fonts. There is no documentation and no tools :/

[jetrotal]

Have you guys tested a tool called nanoemoji? https://github.com/googlefonts/nanoemoji

I read about it when researching about Serenity OS emojis: https://github.com/linusg/serenityos-emoji-font
Idk if the input must be SVG files or if it can work with png as well.