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[whatwg] [canvas] request for {create, get, put}ImageDataHD and ctx.backingStorePixelRatio

From: Glenn Maynard <glenn@zewt.org>
Date: Tue, 17 Apr 2012 23:18:34 -0500
Message-ID: <CABirCh8bUvB61JdUU9C8ZpZ6ymOdKGJWS_iWGfdRifMjEJXtNg@mail.gmail.com>
On Tue, Apr 17, 2012 at 5:32 PM, Darin Fisher <darin at chromium.org> wrote:

> In Chrome at least, getImageData() doesn't actually block to fetch pixels.
>  The thread is only blocked when the first dereference of the pixel buffer
> occurs.  I believe this is done so that a getImageData() followed by
> putImageData() call will not need to block the calling thread.
>

This isn't good enough.  It gives no way for developers to ensure that they
don't access the image data until doing so won't cause a synchronous flush.

-- 
Glenn Maynard
Received on Tuesday, 17 April 2012 21:18:34 GMT

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