[Webkit-unassigned] [Bug 155966] New: marker with orient=auto can have incorrect rotation for start, mid or end markers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=155966

            Bug ID: 155966
           Summary: marker with orient=auto can have incorrect rotation
                    for start, mid or end markers
    Classification: Unclassified
           Product: WebKit
           Version: Safari 9
          Hardware: iOS
                OS: iOS 9.3
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: craigmandsager at yahoo.com
                CC: zimmermann at kde.org

Created attachment 275084
  --> https://bugs.webkit.org/attachment.cgi?id=275084&action=review
marker bugs with orient=auto

When marker orientation is set to auto, the rotation of the marker does not follow the specification (SVG 1.1). Specifically, 

bug1: start and end markers of an open path are not tangent to outgoing/incoming line.
bug2: end-marker of closed path not oriented to specification 'case for closed path'
bug3: random mid-marker not oriented properly

See the attached document for examples of each bug. 
All shapes display as expected in Firefox.

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