[Suggestion] GPU flags for bold/italic output

[ghost]

Description

I think it's good to be able to write bold/italic output. I see this like GPU flags. We call gpu.setBold(true) and next call of gpu.set or gpu.fill will draw bold text.

Problems

• Bitmap font can't be italic or bold. I think we should add special fonts for bold, italic and other flags.
• Who'll implement this? :smiley_cat:

  API Changes

I think it's easy to use flags with functions like gpu.set<Something>(state: boolean). So...

• gpu.setBold(state: boolean) will turn bold output on or off.
• gpu.setItalic(state: boolean) like gpu.setBold, but for italic output
• Other flags can be here, underline, strikethrough etc...

What do you think about it?

[fnuecke]

A more... realistic approach taking into account the current workings of things might be to have a set of bold/italic characters in the font file, and have the software use those as required (i.e. replace normal with bold glyphs in a string).

[SaphireLattice]

@fnuecke But wouldn't that require to triple the amount of glyphs in the font file?

[fnuecke]

Only if we'd require a bold+italic representation for every glyph, which I think is not really needed? Latin alphabet, numbers and maybe some special characters could be an acceptable compromise. Aside from that, even if they were picked by the GPU/renderer, it's a bitmap font, so they need defining anyway.

[SaphireLattice]

Where they will be stored, though? On the other note: can we add custom glyph size in the fonts? Probably will need a special line on the top of the file though.

[skyem123]

It's worth noting that underline and strikethrough can be done without extra glyphs.

[dgelessus]

Unicode has "mathematical" letters in one of the astral planes, which come in different styles, such as bold, italic, sans/serif, double-struck, cursive, you name it. If the font supported those, they would probably be the best way to implement bold/italic formatting without needing to redraw the whole font in bold.

[skyem123]

That would be useful, though what would happen if someone tried to make a bold unicode bold? Nothing?

[J0SLAN]

I'd do this myself by editing the font and trading out characters through a text parser, but editing the font doesn't work. Changing the font.hex file and the wcwidths file doesn't work. If it did, then we could just do this ourselves.

[payonel]

bold should be implemented as brighter colors, italics and strikethrough are different font glyphs. oc is going to stick with the current font.hex and at most and more unicode codepoints