[Webkit-unassigned] [Bug 130962] New: [CoordinatedGraphics] Content scale factor should not be applied to draw contents when fixed layout is not used.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=130962

           Summary: [CoordinatedGraphics] Content scale factor should not
                    be applied to draw contents when fixed layout is not
                    used.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eunmi15.lee at samsung.com


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.

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