[Webkit-unassigned] [Bug 29151] New: Pixel rows missing upon scrolling.pdf files down.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=29151

           Summary: Pixel rows missing upon scrolling.pdf files down.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://citeseer.ist.psu.edu/cache/papers/cs/27557/http
                    :zSzzSzwww.fing.edu.uyzSzincozSzpedecibazSzbibliotezSz
                    repteczSzTR0116.pdf/panario00analysis.pdf
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Minor
          Priority: P2
         Component: PDF
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: norm at cap-lore.com


As I scroll down with two fingers I sometimes see a row of white or blue pixels
between two correct rows of text pixels—rows that come from the same text line.
The bad pixel rows appear upon scrolling the text down.
In the blue pixel case (as in the referenced .pdf file) the pixels that should
be black are blue instead and other pixels of the row are white.

Sometimes I see a row of white pixels between two rows of text pixels.
I think in both documents the .pdf file is just one column wide.
The attached .tiff file was made from page 3 of the document.
It shows 4 rows of blue and white pixels that should be black and white.
I scrolled when the Grab utility had focus.
Magnification = 125%.

Clicking "Report bugs to Apple" causes the bad pixel rows to be fixed.

WebKit Version: 6531.9, r48199

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