[webkit-dev] New web-facing canvas feature: "opaque" attribute

Dirk Schulze dschulze at adobe.com
Wed Mar 13 09:30:08 PDT 2013

This is a very long thread and I did not see any conclusions or agreement on this thread. Can you summarize the topic and the status on the acceptance level please?


On Mar 13, 2013, at 9:15 AM, Stephen White <senorblanco at chromium.org> wrote:

> Hi WebKittens,
> I'm planning to implement the canvas "opaque" attribute, as proposed here:  http://lists.w3.org/Archives/Public/public-whatwg-archive/2013Mar/0109.html.
> This is an attribute that causes the allocation of an opaque backing store for <canvas>, allowing optimizations at the time the canvas is composited into the page, such as disabling blending and culling obscured content.  It is based on the moz-opaque attribute currently shipping in Firefox.
> I'll be placing the feature behind the build-time flag ENABLE(OPAQUE_CANVAS).
> Let me know if you have any comments or concerns.
> Stephen
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