[Webkit-unassigned] [Bug 30635] New: Chromium Linux: disable subpixel text on layers.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=30635

           Summary: Chromium Linux: disable subpixel text on layers.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: agl at chromium.org


http://code.google.com/p/chromium/issues/detail?id=25365

With the addition of layers for drawing rounded corners in r49641, subpixel
text on rounded rectangles broke. This is because the layer only contains a
single alpha channel and this is insufficient to compose subpixel text
correctly.

On Windows, a large body of code in TransparencyWin.cpp exists to try to deal
with this. Even then, in some cases, it downgrades to anti-aliased text. We
need a fix for the grevious effects quickly thus this patch disables subpixel
text when rendering into a layer.

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