feature request: add Fira Math to the fontlist

[xzackli]

I totally understand if GR is supposed to be a lean plotting package with a fixed font list, in which case please close this issue.

Could Fira Math be added to the fontlist? Fira Sans is a particularly clear font, and this variant has strong Unicode support.

[jheinen]

I think we can add the Fira font family:

const texlive_dir = "/usr/local/TeX/texmf-dist/fonts/opentype/public"

const firamath_font = joinpath(texlive_dir, "firamath", "FiraMath-Regular.otf")
const fira_font_dir = joinpath(texlive_dir, "fira")

ENV["GKS_FONT_DIRS"] = string(pwd(), ":", fira_font_dir)

using GR

selntran(0)
setcharheight(0.015)
settextalign(GR.TEXT_HALIGN_CENTER, GR.TEXT_VALIGN_HALF)

y = 0.95
for fontname in [firamath_font; readdir(fira_font_dir)]
  global y
  font = loadfont(fontname)
  settextfontprec(font, GR.TEXT_PRECISION_OUTLINE)
  text(0.5, y, "The quick brown fox jumps over the lazy dog")
  tbx, tby = inqtext(0.5, y, "The quick brown fox jumps over the lazy dog")
  fillrect(tbx[1], tbx[2], tby[1], tby[3])
  y -= 0.03
end

updatews()

[jheinen]

Unfortunately, the FiraMath font can't be uses as a replacement for the (default) font CMUSerif-Math, because it's incomplete. Not only glyphs are missing, but also the font metrics do not match the current implementation of our formula editor (character sizes, alignment etc.). Against this background, an extension of the mathematical fonts in GR makes little sense.

The Fira fonts can of course be used for normal text output.

[xzackli]

Thank you so much for taking a look at this! I'm disappointed to hear that the math fonts won't work out, but I'm not totally surprised. I know GR does a lot of custom drawing, and math fonts seem very perilous.