[Webkit-unassigned] [Bug 146273] New: Subpixel rendering: pixel snapping rounds to wrong position.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146273

            Bug ID: 146273
           Summary: Subpixel rendering: pixel snapping rounds to wrong
                    position.
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zalan at apple.com

RenderLayer::paintForegroundForFragmentsWithPhase() gets a fragment with a foregroundRect of, say:

(WebCore::LayoutRect) $23 = (m_location = { x = -96452px (-6172928), y = 0px (0) }, m_size = { width = 146px (9344), height = 310px (19840) })

where -96452 is the left edge of the layer (negative, because we're in vertical-rl content).

snapRectToDevicePixels() is converting that to:

(const WebCore::FloatRect) $24 = {
  m_location = (m_x = -96451.5, m_y = 0)
  m_size = (m_width = 146, m_height = 310)
}

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20150624/ceb8ba07/attachment.html>