systemfonts (version 1.2.1)

glyph_outline: Get the outline of glyphs

Description

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
)

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

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

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')