[Webkit-unassigned] [Bug 57085] New: SVG discrete animations without calcMode occur at incorrect time

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=57085

           Summary: SVG discrete animations without calcMode occur at
                    incorrect time
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows 7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: shimizu.wataru at canon.co.jp
                CC: zimmermann at kde.org


Created an attachment (id=86898)
 --> (https://bugs.webkit.org/attachment.cgi?id=86898&action=review)
font-style animation without calcMode attribute

Attahced file is the test case (simplified version of
LayoutTests/W3C-SVG-1.1/animate-elem-46-t.svg).

I think changes of font-style and translate should occur simultaneously as follows (column1: second, 2: translate, 3: font-style).
0.0-1.0s  0 normal
1.0-2.0s 30 italic
2.0-3.0s 60 normal
3.0-     60 normal

However, the font-style animation seems incorrect. Here is the result of my investigation.
0.0-1.0s  0 normal
1.0-1.5s 30 normal
1.5-2.0s 30 italic
2.0-3.0s 60 italic
3.0-     60 normal

If calcMode="discrete" is explicitly added to the <animate> element, it works well.

I saw this problem on nightly builds (Win: r81845 and Mac: r81829).

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