Byte offset of the line's first character.
Baseline, measured down from the top of the run.
The box's height stopped this line being drawn.
This line was cut short and ends in an ellipsis.
Codepoints the line holds.
Bytes the line holds.
Codepoints no face in the chain had a glyph for.
Advance width in pixels.
Left edge once the alignment is applied.
Top edge of the line box.
One line of a measured run. Mirrors
TinyTextLine.