Get the outline of glyphs — glyph_outline • systemfonts

This function allows you to retrieve the outline of glyphs as polygon coordinates. The glyphs are given as indexes into a font file and not as characters allowing you to retrieve outlines for glyphs that doesn't have a character counterpoint. Glyphs that are given as bitmaps are ignored.

Usage

glyph_outline(
  glyph,
  path,
  index = 0,
  size = 12,
  tolerance = 0.2,
  verbose = FALSE
)

Arguments

glyph: The index of the glyph in the font file
path: The path to the font file encoding the glyph
index: The index of the font in the font file
size: The size of the font in big points (1/72 inch)
tolerance: The deviation tolerance for decomposing bezier curves of the glyph. Given in the same unit as size. Smaller values give more detailed polygons
verbose: Should font and glyph loading errors be reported as warnings

Value

A data frame giving the outlines of the glyphs provide in glyph. It contains the columns glyph pointing to the element in the input it relates to, contour enumerating the contours the glyph consists of, and x and y giving the coordinates in big points

Examples

# Get the shape of s in the default font
font <- font_info()
glyph <- glyph_info("s", path = font$path, index = font$index)

s <- glyph_outline(glyph$index, font$path, font$index, size = 150)

plot(s$x, s$y, type = 'l')