Bug 134342

Summary: [CSS Blending]The background images set on the root element will blend on an initial white backdrop.
Product: WebKit Reporter: Ion Rosca <rosca>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: bunhere, cdumez, commit-queue, dino, esprehn+autocc, glenn, gyuyoung.kim, kondapallykalyan, mihnea, sergio, simon.fraser, WebkitBugTracker
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 108546    
Attachments:
Description Flags
Test.
none
Patch none

Ion Rosca
Reported 2014-06-26 01:11:54 PDT
The background images set on the root element will blend with an initial white backdrop. Instead, they should blend with the background-color of the root element, or, if no background-color is specified for the root element, background images should blend over an initial transparent backdrop. The spec states: Each background layer must blend with the element’s background layer that is below it and the element’s background color. Background layers must not blend with the content that is behind the element, instead they must act as if they are rendered into an isolated group.
Attachments
Test. (812 bytes, text/html)
2014-06-26 02:13 PDT, Ion Rosca 		no flags
Details
Patch (16.11 KB, patch)
2014-06-27 06:41 PDT, Ion Rosca 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Ion Rosca
Comment 1 2014-06-26 02:13:35 PDT
Created attachment 233896 [details] Test. I attached an html demonstrating the issue. Here is a discussion on public-fx and www-style related to this use case: http://lists.w3.org/Archives/Public/public-fx/2014AprJun/0175.html.
Ion Rosca
Comment 2 2014-06-27 06:41:46 PDT
Created attachment 233980 [details] Patch
Ion Rosca
Comment 3 2014-06-30 21:44:02 PDT
Simon, could you please have a look at this patch?
WebKit Commit Bot
Comment 4 2014-07-07 00:16:32 PDT
Comment on attachment 233980 [details] Patch Clearing flags on attachment: 233980 Committed r170841: <http://trac.webkit.org/changeset/170841>
WebKit Commit Bot
Comment 5 2014-07-07 00:16:38 PDT
All reviewed patches have been landed. Closing bug.
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