Bug 146539

Summary: Weird behavior of css clip-path when trying to create multiple clippling areas using the polygon shape
Product: WebKit Reporter: Said Abou-Hallawa <sabouhallawa>
Component: CSSAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: dino, krit, sabouhallawa, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 126207    
Attachments:
Description Flags
test case none

Said Abou-Hallawa
Reported 2015-07-01 20:25:58 PDT
Created attachment 255987 [details] test case Open the attached test case. It has four <div> elements, each of them clips a red rectangle using a css clip-path. The css clip-paths use polygons to create different multiple clipping areas. A clipping area is closed by returning to the first point. This allows multiple areas to be created by a single polygon shape. The clip-paths in the test case represent the combinations of three clipping areas. When two areas are included, the clipping works fine. But when the three clipping areas are included, something wrong happens. The points of areas connect each other. I could not the specs that explains how to create multiple clipping areas by a single polygon. If it is not spec-ed, then we still have a bug with the first three cases: the two shapes should not be separated. We may also have a bug in the specs for not providing a way to create a "real path" for the css clip-path.
Attachments
test case (1.04 KB, text/html)
2015-07-01 20:25 PDT, Said Abou-Hallawa 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2015-07-02 11:35:13 PDT
<rdar://problem/21656455>
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