indexToPos
Converts from an index within a PangoLayout
to the onscreen position corresponding to the grapheme at that index.
The returns is represented as rectangle. Note that pos->x
is always the leading edge of the grapheme and pos->x + pos->width
the trailing edge of the grapheme. If the directionality of the grapheme is right-to-left, then pos->width
will be negative.
Parameters
index
byte index within @layout
pos
rectangle in which to store the position of the grapheme