A fallback font is a font to use as a substitute if the chosen font does not
contain the requested characters. Using font fallbacks means that the user
doesn't have to worry about mixing characters from different scripts or
mixing text and emojies. Fallback is calculated for the full string and the
result is platform specific. If no font covers all the characters in the
string an undefined "best match" is returned. The best approach is to figure
out which characters are not covered by your chosen font and figure out
fallbacks for these, rather than just request a fallback for the full string.
Usage
font_fallback(
string,
family = "",
italic = FALSE,
bold = FALSE,
path = NULL,
index = 0
)
Arguments
- string
The strings to find fallbacks for
- family
The name of the font families to match
- italic
logical indicating the font slant
- bold
logical indicating whether the font weight
- path, index
path an index of a font file to circumvent lookup based on
family and style
Value
A data frame with a path and index column giving fallback for the
specified string and font combinations
Examples
font_fallback("\U0001f604") # Smile emoji
#> path index
#> 1 /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf 0