[Webkit-unassigned] [Bug 29305] New: Canvas drawn with data URL image raises SECURITY_ERR when toDataUrl() called.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=29305

           Summary: Canvas drawn with data URL image raises SECURITY_ERR
                    when toDataUrl() called.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: abarth at webkit.org
                CC: ap at webkit.org, sam at webkit.org


Importing issue http://code.google.com/p/chromium/issues/detail?id=21847

Reported by btlee at google.com, Yesterday (36 hours ago)
Chrome Version       : 4.0.206.1 (Official Build 25376)
URLs (if applicable) : http://members.shaw.ca/briantclee/canvas.html
Other browsers tested:
Add OK or FAIL after other browsers where you have tested this issue:
     Safari 4: FAIL. 
  Firefox 3.x: OK
     Opera 10: OK
         IE 7: FAIL. Canvas not supported.
         IE 8: FAIL. Canvas not supported.


What steps will reproduce the problem?
1. Have a webpage:
   1. Create an Image from a data URL.
   2. Create a canvas.
   3. Draw the image to the canvas.
   4. Call canvas.toDataURL().
2. Launch the webpage.


What is the expected result?
toDataURL() returns a data URL for the image drawn to the canvas.

What happens instead?
Error in the console: "Uncaught Error: SECURITY_ERR: DOM Exception 18". 

Drawing from an image with source being a data URL seems to set the
origin-clean flag false. I don't think this should be although it doesn't
explicitly mention this in
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html

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