[whatwg] Canvas in Workers

[Justin Novosad]

On Wed, Jan 9, 2013 at 2:50 PM, Stephen White <senorblanco at chromium.org>wrote:

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> Currently, to lower the VRAM footprint and improve performance, we don't do
> a copy in 2d canvas.  We temporarily transfer ownership of the texture to
> the compositor at commit time, and block the renderer until the composite
> is complete.  That may change, however.
>
> Stephen
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>
To be more accurate, the renderer only blocks if it needs to access the
texture, for example if getImageData is called before the composite is
complete. All write operations are non-blocking because they can be
recorded an deferred until the composite is complete.

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