Add a squiggly line to the current path in the specified cairo context that
approximately covers the given rectangle in the style of an underline used
to indicate a spelling error.
The width of the underline is rounded to an
integer number of up/down segments and the resulting rectangle is centered
in the original rectangle.
Add a squiggly line to the current path in the specified cairo context that approximately covers the given rectangle in the style of an underline used to indicate a spelling error.
The width of the underline is rounded to an integer number of up/down segments and the resulting rectangle is centered in the original rectangle.