Bug 118485

Summary: [CSS Shapes] Content isn't wrapping tightly to zero-width shape segment
Product: WebKit Reporter: Alan Stearns <stearns>
Component: CSSAssignee: Hans Muller <giles_joplin>
Status: RESOLVED FIXED    
Severity: Normal CC: dino, jonlee, webkit-bug-importer, WebkitBugTracker
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 98664    
Attachments:
Description Flags
reftest for Roman writing mode
none
additional reftest none

Alan Stearns
Reported 2013-07-08 14:47:23 PDT
Created attachment 206272 [details] reftest for Roman writing mode If a polygon is defined to have a zero-width segment - such as polygon(0% 0%, 0% 51%, 100% 100%, 0 100%) - then content that intersects with that segment wraps around the bounding box of the shape instead of up against the shape segment.
Attachments
reftest for Roman writing mode (978 bytes, application/zip)
2013-07-08 14:47 PDT, Alan Stearns 		no flags
Details
additional reftest (1.54 KB, application/zip)
2013-07-08 17:16 PDT, Alan Stearns 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Alan Stearns
Comment 1 2013-07-08 17:16:04 PDT
Created attachment 206284 [details] additional reftest The latest nightly appears to ignore empty shape segments, so the original reftest now passes. I've attached a new reftest that moves the empty segment to the midpoint of the float. Here I'd expect the inline content to start at that midline.
Radar WebKit Bug Importer
Comment 2 2014-01-31 11:22:20 PST
<rdar://problem/15958849>
Jon Lee
Comment 3 2014-03-04 21:56:27 PST
What's the latest on this?
Alan Stearns
Comment 4 2014-03-04 22:21:49 PST
We're discussing whether this is a bug in the implementation or a bug in the spec. In either case, I think it's very low-priority - you have to create a fairly degenerate polygon in order to reproduce the problem.
Hans Muller
Comment 5 2014-04-04 14:39:52 PDT
As of the patch for https://bugs.webkit.org/show_bug.cgi?id=130975 we've addressed this issue. More about the zero-width segment case and the semantics of self-intersecting polygonal shapes can be found here: http://hansmuller-webkit.blogspot.com/2014/03/a-simpler-algorithm-for-css-shapes.html
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