[PATCH v1 weston 06/11] tests: Add screenshot recording to weston-test

[Bryce Harrington]

On Mon, Nov 24, 2014 at 01:01:29PM +0200, Pekka Paalanen wrote:
> could we use a wl_shm-based wl_buffer instead of a file, please?
> 
> That way we can simply relay the pixels as is to the test client, which
> can then compare without compressing and decompressing from PNG first.
> 
> For an example how to do this, see Weston's screenshooter protocol and
> implementation.
> 
> I think you also want to specify in the record_screenshot request:
> - which output to capture (in case there are multiple)
> - the rectangular sub-region that must be contained in the output
>   (which you already do with the clip coords in a later patch, so that
>   should be squashed here)

Actually, if we're not storing the screenshot to a file on the server
side, I wonder if we even need to communicate the sub-region coords to
the server?  We can just let it pass the full image to the client and
take care of clipping and whatnot all client-side.

It'd probably be more bandwidth efficient to just pass the bit of image
we're going to test, but I don't think we care about that much here.  By
doing it all client-side it'll keep the protocol and the server-side
implementation more minimal.

Bryce