Bug 252490 - ch unit is not resolved properly when writing direction is vertical
Summary: ch unit is not resolved properly when writing direction is vertical
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Text (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2023-02-17 10:09 PST by zalan
Modified: 2023-03-01 14:06 PST (History)
7 users (show)

See Also:

Attachments
test case (203 bytes, text/html)
2023-02-17 10:09 PST, zalan 		no flags Details
(similar) test case (201 bytes, text/html)
2023-02-17 10:28 PST, zalan 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description zalan 2023-02-17 10:09:15 PST 
Created attachment 465057 [details]
test case

need to flip glyph height -> glyph width
Comment 1 Ahmad Saleem 2023-02-17 10:14:59 PST 
For some strange reason - this test case on iOS 16.3.1 using iPhone 13 Pro Max works differently compared to macOS and does not show "Red" or "Green" but "Blue".
Comment 2 zalan 2023-02-17 10:28:37 PST 
Created attachment 465058 [details]
(similar) test case
Comment 3 zalan 2023-02-17 10:29:09 PST 
(In reply to Ahmad Saleem from comment #1)
> For some strange reason - this test case on iOS 16.3.1 using iPhone 13 Pro
> Max works differently compared to macOS and does not show "Red" or "Green"
> but "Blue".
that's certainly odd. what do you see with the second test case?
Comment 4 Ahmad Saleem 2023-02-17 10:30:35 PST 
(In reply to zalan from comment #3)
> (In reply to Ahmad Saleem from comment #1)
> > For some strange reason - this test case on iOS 16.3.1 using iPhone 13 Pro
> > Max works differently compared to macOS and does not show "Red" or "Green"
> > but "Blue".
> that's certainly odd. what do you see with the second test case?

Same blue text and I am using it in Private Mode (tab). :-(
Comment 5 zalan 2023-02-17 10:35:48 PST 
(In reply to Ahmad Saleem from comment #4)
> (In reply to zalan from comment #3)
> > (In reply to Ahmad Saleem from comment #1)
> > > For some strange reason - this test case on iOS 16.3.1 using iPhone 13 Pro
> > > Max works differently compared to macOS and does not show "Red" or "Green"
> > > but "Blue".
> > that's certainly odd. what do you see with the second test case?
> 
> Same blue text and I am using it in Private Mode (tab). :-(
do you see only 0s or 1s too?
Comment 6 Ahmad Saleem 2023-02-17 10:36:58 PST 
(In reply to zalan from comment #5)
> (In reply to Ahmad Saleem from comment #4)
> > (In reply to zalan from comment #3)
> > > (In reply to Ahmad Saleem from comment #1)
> > > > For some strange reason - this test case on iOS 16.3.1 using iPhone 13 Pro
> > > > Max works differently compared to macOS and does not show "Red" or "Green"
> > > > but "Blue".
> > > that's certainly odd. what do you see with the second test case?
> > 
> > Same blue text and I am using it in Private Mode (tab). :-(
> do you see only 0s or 1s too?

Yes - I see them 000111 in blue text.

I see them in both cases but in blue compared to macOS, where it is green / red.
Comment 7 zalan 2023-02-17 16:56:08 PST 
apparently widthForGlyph(zeroGlyph) always returns 16px when platformData().orientation() != FontOrientation::Horizontal
(and we size the block incorrectly)
Comment 8 Radar WebKit Bug Importer 2023-02-24 10:10:21 PST 
<rdar://problem/105889789>