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

[Glenn Maynard]

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