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How To Get Around the Holes In IE9 Beta's Implementation of Canvas

Posted by timothy on from the canvas-the-neighborhood dept.

mudimba writes "Microsoft has made grand announcements about how great their implementation of the HTML5 canvas specification is. However, while I was porting a large HTML5 application to work with IE9 beta I found that there are some key features missing. Workarounds are provided where possible. (Disclaimer: I am the author of the submitted article.)"

3 of 111 comments (clear)

  1. Beta browser, draft spec... by BlueScreenO'Life · · Score: 5, Insightful

    So, a browser in beta phase does not conform to a specification in draft stage!
    Who would have thought!

  2. Test Cases by Anonymous Coward · · Score: 5, Insightful

    1. He's using IE9 Beta 1, which is fairly old and out of date. He should try the latest platform preview.
    2. He should post functional test cases, like ACID does, instead of posting just the code and pictures.
    3. He should contact MS. Instead he is relying on the nerd-rage from Slashdot to get big enough for them to notice. They have an appropriate channel for this where the issue can be discussed.
    4. Despite what people think, canvas is not HTML. It's a proprietary and patented Apple technology that has been submitted to W3C for review as a potential addition to HTML. Yes, submission to W3C does require patent disclosure and royalty-free licensing when a submission becomes a part of a recommendation, but canvas has not reached that stage. Patent fears aside, as an early draft it is a standard subject to change either by W3C or by anyone who feels like interpreting the draft as they see fit, which could occur concurrently as in opposition to each other.

  3. Microsoft Responds by TimSneath · · Score: 5, Informative

    Hi there, thank you for the post. I just wanted to add a few observations on behalf of the Internet Explorer team.

    Firstly, no browser offers a perfect implementation of the Canvas 2D API specification to date - we've documented and shared a few examples from our test suites here: http://samples.msdn.microsoft.com/ietestcenter/#html5Canvas

    As has been well noted, the IE9 build tested was our beta.

    Secondly, in response to the specific issues raised, Giorgio Sardo has posted a response on his blog here:
          http://blogs.msdn.com/b/giorgio/archive/2011/01/14/building-great-browsers-together.aspx

    We'll update this entry over time.

    Thanks for listening,

    Tim Sneath | Microsoft Corp.