Bug 134903

Summary:

Subpixel rendering: Zero sized compositing container's content positioned off by one device pixel.

Product:

WebKit

Reporter:

zalan <zalan>

Component:

Layout and Rendering

Assignee:

zalan <zalan>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

commit-queue, esprehn+autocc, glenn, kondapallykalyan, simon.fraser

Priority:

Keywords:

InRadar, Regression

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Patch	none

Description zalan 2014-07-14 14:50:04 PDT

The content gets pushed to the left/bottom when the parent compositing layer has zero size.
<style>
.container {
    position: absolute;
    left: 0.25px;
    top: 0px;
    -webkit-transform: translateZ(0); 
}

.foo {
    position: absolute;
    left: 0.25px;
    top: 0px;
    width: 100px;
    height: 100px;
    border: 0.5px solid red;
}
</style>
<div class=container>
    <div class=foo></div>
</div>

Comment 1 zalan 2014-07-14 14:50:27 PDT

<rdar://problem/17618608>

Comment 2 zalan 2014-07-14 15:14:25 PDT

Created attachment 234883 [details]
Patch

Comment 3 WebKit Commit Bot 2014-07-14 19:55:47 PDT

Comment on attachment 234883 [details]
Patch

Clearing flags on attachment: 234883

Committed r171100: <http://trac.webkit.org/changeset/171100>

Comment 4 WebKit Commit Bot 2014-07-14 19:55:50 PDT

All reviewed patches have been landed.  Closing bug.