Last Comment Bug 649577 - Before and after the transition of transform, the baseline of the glyphs are uneven.
: Before and after the transition of transform, the baseline of the glyphs are ...
Status: UNCONFIRMED
:
Product: Core
Classification: Components
Component: Graphics (show other bugs)
: unspecified
: x86_64 Windows 7
: -- trivial (vote)
: ---
Assigned To: Nobody; OK to take it and work on it
:
Mentors:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2011-04-12 23:52 PDT by Alan Gresley
Modified: 2011-04-13 21:06 PDT (History)
1 user (show)
See Also:
Crash Signature:
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QA Whiteboard:
Iteration: ---
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Has Regression Range: ---
Has STR: ---


Attachments
Three examples, one using Ahem font (1.98 KB, text/html)
2011-04-12 23:56 PDT, Alan Gresley
no flags Details

Description Alan Gresley 2011-04-12 23:52:37 PDT
User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

Watch the bottom of the line boxes 'Xx' and 'kK'. The baseline of the glyphs are only level when transitioning is happening. Before and after the transition, there is a 2px or 3px difference.

The baseline of the glyphs are only level when transitioning of transform is happening.

Reproducible: Always

Steps to Reproduce:
1. Hover the examples to cause a transition which causes a transformation.

Actual Results:  
Observed that the baseline of the glyphs is uneven when no transitioning is happening. 

Expected Results:  
The baseline of the glyphs are level when no transitioning is happening
Comment 1 Alan Gresley 2011-04-12 23:56:05 PDT
Created attachment 525636 [details]
Three examples, one using Ahem font
Comment 2 Alan Gresley 2011-04-13 00:01:37 PDT
Similar to this bug.

https://bugzilla.mozilla.org/show_bug.cgi?id=492214
Comment 3 David Baron :dbaron: ⌚️UTC-7 (review requests must explain patch) 2011-04-13 21:06:28 PDT
When the transitioning of transform is happening, things are layerized; when it's not, you're probably seeing a similar text layout problem as the bug you point out -- except on Windows.  (Cairo's idea of text layout with interesting transforms generally seems problematic...)

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