True italic font support

[mklein994]

Currently, italic fonts are achieved by making the current font oblique. It would be great if it would use the italic font instead.

Here's how I envision it could work: Similar to using a custom font with ~/.termux/font.ttf, put an italic font in a file called ~/.termux/font-italic.ttf. Then run this:

$ termux-reload-settings
$ echo -e '\e[3m light fixture \e[0m' # characters that look different in italics

and it would print this:
light fixture

---

Examples with Source Code Pro

Regular:

Italic:

[LittleHouse75]

This would be very cool -- hoping to use the font Operator Mono (or one of its free clones) with emacs in Termux.

[zorro]

Any updates on this?

[doas-ice]

It would be really cool to have this feature. I really love Victor-mono.

[j0ng4b]

Well, I successfully build a version of termux thats support italics here some screenshots:

With an italic font:

Without an italic font:

Without italic the text is rendered as a monospaced text. Should I make a pull request? I not already not made one because what I made on code seems a bit of mess and had some points I can't understand.

[j0ng4b]

Would be possible to also add true support to bold fonts.

[zorro]

Well, I successfully build a version of termux thats support italics here some screenshots:

With an italic font:

Without an italic font:

Without italic the text is rendered as a monospaced text. Should I make a pull request? I not already not made one because what I made on code seems a bit of mess and had some points I can't understand.

I think it will be better to fallback to the regular font rather than the monospace font

[j0ng4b]

I think it will be better to fallback to the regular font rather than the monospace font

It's true, I forgot to made this, the monospace was to test if everything works as expected, a better fallback is to use the current behaviour of italics alongside the regular font

[rendiix]

amazing, waiting for this PR to be merged