[Public WebGL] Some WebGL draft feedback

Mark Callow [email protected]
Mon Jan 11 22:12:15 PST 2010

Kenneth Russell wrote:
> On Fri, Jan 8, 2010 at 2:54 PM, Chris Marrin <[email protected] 
> <mailto:[email protected]>> wrote:
>     The ability to support 2 separate OpenGL contexts on the same
>     drawable is certainly not a universal feature. We shouldn't its
>     existence on a particular platform as evidence that it would be
>     easy to support on any platform. It's important for the design to
>     be adaptable to many architectures without unduly hampering some.
> It's a feature in every OpenGL window system binding I'm aware of 
> except those on Mac OS X, which doesn't provide an abstraction for the 
> OpenGL drawable.
It is not a "feature" of every OpenGL ES 1.1 window system binding. I 
put feature in quotes because the feature is supported by the EGL API 
but implementations are not required to support EGL surfaces that can be 
rendered to by multiple contexts. I have not yet worked with enough ES 
2.0 implementations to be able to make the same statement for that but I 
would not be in the least surprised to find similarly limited 


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