Bug 130962

Summary: [CoordinatedGraphics] Content scale factor should not be applied to draw contents when fixed layout is not used.
Product: WebKit Reporter: Eunmi Lee <enmi.lee>
Component: WebKit2Assignee: Eunmi Lee <enmi.lee>
Severity: Normal CC: a.badowski, bunhere, cmarcelo, commit-queue, luiz, noam, sergio, zeno
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Description Flags
Patch none

Description Eunmi Lee 2014-03-31 03:14:11 PDT
Contents is painted by applying current page scale factor in the coordinated graphics even though page scale factor is already applied to the contents when fixed layout is not used.
That means page scale factor is applied twice when fixed layout is not used.

We can see wrong scaling results in the efl port's MiniBrowser using control+"-/+" button.
- Bottom of the screen is not rendered (just white) when scale factor is less than 1.0.
- We can not scroll down to the bottom of the page when scale factor is greater than 1.0.

If fixed layout is not used delegating scaling is also not used,
so we should not apply page scale factor to draw contents in that case.
Comment 1 Eunmi Lee 2014-03-31 03:37:58 PDT
Created attachment 228167 [details]
Comment 2 Gyuyoung Kim 2014-03-31 03:44:03 PDT
Comment on attachment 228167 [details]

I'm not coordinated graphics expert though, as far as I know, Coordinated graphics is only used by EFL port. So, rs=me for EFL port development.
Comment 3 WebKit Commit Bot 2014-04-01 01:34:38 PDT
Comment on attachment 228167 [details]

Clearing flags on attachment: 228167

Committed r166572: <http://trac.webkit.org/changeset/166572>
Comment 4 WebKit Commit Bot 2014-04-01 01:34:42 PDT
All reviewed patches have been landed.  Closing bug.
Comment 5 Andrzej Badowski 2014-04-04 07:29:50 PDT
*** Bug 130838 has been marked as a duplicate of this bug. ***