163085 - ATSUI fallback doesn't use Quartz anti-aliasing

Status: RESOLVED FIXED

(Core :: Internationalization, defect)

Description

[Henri Sivonen (:hsivonen)]

Build ID: 2002081403

The ATSUI fallback uses old QD rendering instead of Quartz anti-aliasing. Using
Quartz anti-aliasing throughout would look better--especially with pages that
have both chars that go through the MacRoman codepath and chars go through the
ATSUI fallback codepath.

Comment 1

[Simon Fraser [no longer active]]

I think this is really an Apple bug. To work around it, we'd have to do what my
ATSUI patch does for ATSUI-rendered text, which is to set a CGContext on the
ATSUTextLayout (and deal with the resulting coordinate switch).

Comment 2

[Greg K.]

Maybe this should just be WONTFIX in favor of bug 121540.

Comment 3

[Greg K.]

Is this what causes Latin and Cyrillic characters in the same Unicode font to
display at different quality levels?

Comment 4

[Henri Sivonen (:hsivonen)]

> Maybe this should just be WONTFIX in favor of bug 121540.

I guess that depends on the ETA of bug 121540.

> Is this what causes Latin and Cyrillic characters in the same Unicode font 
> to display at different quality levels?

If you aren't seeing a similar quality difference in TextEdit, yes this is the bug.

Comment 5

[Greg K.]

Attachment: Minimal testcase

Comment 6

[Henri Sivonen (:hsivonen)]

Opera 6.0b3 just got ahead of Mozilla in this area.

Comment 7

[Frank Tang]

I think both roy and me are off mozilla for more than 2 years. If these bugs are
still here now, I think the real stauts is 'won't fix'. If you want to reopen
it, please find a new owner for it first. 

Comment 8

[Travis Chase]

Mass Reassign Please excuse the spam

Comment 9

[Travis Chase]

Mass Re-opening Bugs Frank Tang Closed on Wensday March 02 for no reason, all
the spam is his fault feel free to tar and feather him

Comment 10

[Travis Chase]

Reassigning Franks old bugs to Jungshik Shin for triage - Sorry for spam

Comment 11

[YAMASHITA Makoto]

ATSUI uses Quartz when you associate a Quartz context (by ATSUSetLayoutControls with the tag kATSUCGContextTag) to the text layout object. See
http://developer.apple.com/documentation/Carbon/Reference/ATSUI_Reference/atsu_reference_Reference/chapter_1.2_section_7.html
Looks like an overhaul is needed to achieve this...

Comment 12

[YAMASHITA Makoto]

MLTE (tried in my patch at the bug 121540) does anti-aliasing by default. So I'd like to see dependson=121540.

Comment 13

[Henri Sivonen (:hsivonen)]

We've been using non-QuickDraw rendering for quite a while.