[Webkit-unassigned] [Bug 41192] New: Canvas: bezierCurveTo() and quadraticCurveTo() must ensure subpaths

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=41192

           Summary: Canvas: bezierCurveTo() and quadraticCurveTo() must
                    ensure subpaths
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: HTML5
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: andreas.kling at nokia.com


CanvasRenderingContext2D's bezierCurveTo() and quadraticCurveTo() should implicitly moveTo() the (first) control point if the current path is empty.

This test (on IE Test Center) fails:
http://samples.msdn.microsoft.com/ietestcenter/html5/canvas/canvas-complexShapes-bezierCurveTo-001.htm

This is also covered by (skipped) in-tree tests:
canvas/philip/tests/2d.path.bezierCurveTo.ensuresubpath.2.html
canvas/philip/tests/2d.path.quadraticCurveTo.ensuresubpath.2.html

Spec links:
http://www.whatwg.org/specs/web-apps/current-work/#dom-context-2d-beziercurveto
http://www.whatwg.org/specs/web-apps/current-work/#dom-context-2d-quadraticcurveto

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