382206 - Fix drawing of partial ligatures

Status: RESOLVED FIXED

(Core :: Layout, defect)

Description

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Attachment: testcase (requires Zapfino and a new-textframe build)

There are two bugs with the drawing of partial ligatures, shown in the attached testcase (you'll need the full Zapfino font and the new textframe to see this). Select just the first character of the "Th" ligature to see...

1) The ascender of the h is cut off to the right of the ligature. We're not correctly detecting that the h is the end of the ligature. Simple off by one error.

2) We should pixel-snap the clip rect we use to draw partial ligatures. This will avoid seams between two components of the same ligature.

Comment 1

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Attachment: fix

Comment 2

[Robert O'Callahan (:roc) (email my personal email if necessary)]

checked in.