Unicode Support

library(lofifonts)

Unicode support

Each font supports a different number of glyphs. The vector fonts include just the ASCII character sets.

The font with the best unicode coverage is the bitmap font unifont which supports over 50 thousand glyphs.

Font overview

Type	Name	Unicode?	# glyphs
Bitmap	Spleen	Some	450-1000
Bitmap	Unifont	Lots!	57086
Bitmap	Unscii	Some	3240
Vector	gridfont	Lower case ASCII only	68
Vector	gridfont_smooth	Lower case ASCII only	68
Vector	arcade	Upper case ASCII only	66

Rendering with `unifont`

txt <- "二項分布\xF0\x9F\x8E\xB2の英語表記は\n「Binomial distribution」である。"

bitmap_text_raster(txt, "unifont") |>
  plot(interpolate = FALSE)

Default character

When a particular unicode glyph is not available, some fonts define a default character which should be used instead.

If a default character is not defined for a font then unknown characters will use ?

Lists of supported codepoints

The unicode glyphs supported by each font are listed in the font_info data structure.

# Cozette font - number of codepoints and a list of the first 200
font_info$bitmap$`spleen-12x24`$codepoints |> 
  length()

#> [1] 0

font_info$bitmap$`spleen-12x24`$codepoints |> 
  head(60)

#> integer(0)

font_info$bitmap$`spleen-12x24`$codepoints |> 
  head(60) |>
  intToUtf8()

#> [1] ""

# Arcade font - includes 66 codepoints
font_info$vector$arcade$codepoints

#>  [1]  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83
#> [20]  84  85  86  87  88  89  90  48  49  50  51  52  53  54  55  56  57  46  44
#> [39]  45  32  61  33  63  58  59  35  39  34  91  93  40  41 123 125  36  43  47
#> [58]  42  37  94 124  95  60  62  38  64

intToUtf8(font_info$vector$arcade$codepoints)

#> [1] "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,- =!?:;#'\"[](){}$+/*%^|_<>&@"