On Nov 14, 2017, at 20:11 , Rick Mann <rm...@latencyzero.com> wrote:
> 
> The bigger question is around the copy.

In general, the answer must be that a copy ought to be expected. That’s because 
a data provider is not required to have a data buffer, so there’s not 
necessarily any underlying data to access directly. (The actual data could be 
streamed, or generated procedurally.) If you can limit the kinds of image 
sources, you might get a more specific answer.

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