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Re: [Public WebGL] Moving WEBGL_shared_resources to rejected status

On Wed, Apr 25, 2018 at 11:53 PM, Ken Russell <kbr@google.com> wrote:
We propose moving the WEBGL_shared_resources extension to rejected status.

I always thought it was a bit ambitious and unlikely to happen.
Supporting shared resources portably between contexts across WebGL's OpenGL, OpenGL ES and Direct3D backends is infeasible.

Afaik it isn't infeasible as you're always going to use one backend on one machine. All backends support some flavor of resource sharing between contexts.

There are other ways on the web platform to draw to multiple canvases with one WebGL context.

As of yet there are none for WebGL.