Bug 96584

Summary:

Logic to not composite fixed elements outside the viewport is wrong

Product:

WebKit

Reporter:

Simon Fraser (smfr) <simon.fraser>

Component:

Layout and Rendering

Assignee:

Xianzhu Wang <wangxianzhu>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

bdakin, jamesr, wangxianzhu

Priority:

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Testcase	none
A working test case	none

Simon Fraser (smfr)

Reported 2012-09-12 17:49:22 PDT

Created attachment 163746 [details] Testcase RenderLayerCompositor::requiresCompositingForPosition() has: FrameView* frameView = m_renderView->frameView(); if (frameView && !layer->absoluteBoundingBox().intersects(IntRect(IntPoint(frameView->scrollOffsetForFixedPosition()), frameView->layoutSize()))) return false; This is incorrect, since the fixed element may have abs pos children that lie outside its bounds, but they can be visible in the viewport.

Attachments
Testcase (1.12 KB, text/html) 2012-09-12 17:49 PDT, Simon Fraser (smfr)	no flags	Details
A working test case (1.20 KB, text/html) 2012-09-13 15:36 PDT, Xianzhu Wang	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Xianzhu Wang

Comment 1 2012-09-13 15:36:16 PDT

Created attachment 163983 [details] A working test case

Xianzhu Wang

Comment 2 2012-10-02 08:53:29 PDT

*** This bug has been marked as a duplicate of bug 98144 ***

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