[Webkit-unassigned] [Bug 150028] New: Canvas.toDataURL incorrectly raises exception when using Media Source Extensions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=150028

            Bug ID: 150028
           Summary: Canvas.toDataURL incorrectly raises exception when
                    using Media Source Extensions
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Canvas
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: a.nemec at atlas.cz

Hi all,

these steps can be followed to reproduce the bug:

1. Create a "video" element, a "canvas" element and its 2d "context".

2. Have the video element's "src" be a "MediaSource" URL (createObjectURL is called for a new MediaSource object).

3. Draw an image with context.drawImage(video, 0, 0);

4. You will not be able to call canvas.toDataURL, because a security exception will be raised (incorrectly).

Alex

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