1122020 - textRun bounding box does not take account of glyph positioning (x/y offsets in detailedGlyph records)

Status: RESOLVED FIXED

(Core :: Graphics: Text, defect)

Description

[Jonathan Kew [:jfkthame]]

When handling detailedGlyph records, the code in gfxFont::Measure carefully sets up glyphPt for the adjusted position of a glyph, but then fails to apply it to the glyph's bounding box. :(

Example:

  data:text/html,<div style="font:100px/2 Gentium Basic">
                 x&%23x301;&%23x301;&%23x301;&%23x301;

should display an "x" with 4 acute accents stacked above, but only the first two (and a fragment) are visible because of the unadjusted bounding box.

Comment 1

[Jonathan Kew [:jfkthame]]

Attachment: Account for position offset when collecting glyph bounding boxes

Comment 2

[Jonathan Kew [:jfkthame]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/1dc205923d11

Comment 3

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/mozilla-central/rev/1dc205923d11