[Webkit-unassigned] [Bug 42279] New: Certain text runs measure 1 pixel wider when measured as a whole than when measured piecewise

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=42279

           Summary: Certain text runs measure 1 pixel wider when measured
                    as a whole than when measured piecewise
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Text
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mitz at webkit.org


<rdar://problem/7759909>

Due to the limited precision of the float type, with word- and run-rounding enabled, with certain fonts, measuring individual words in a text run and adding up the widths gives a different result from measuring the entire run.

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