Question about cairo-gl

[Bill Spitzak]

On 05/14/2014 11:58 PM, Pekka Paalanen wrote:
> On Wed, 14 May 2014 12:56:27 -0700
> Bill Spitzak <spitzak at gmail.com> wrote:
>
>> The wayland build instructions also include the building of pixman and
>> cairo in order to enable the cairo gl backend.
>>
>> However I get the impression that weston does not use this unless a
>> switch --with-cairo=gl is passed to configure. Only then does it produce
>> calls to attempt to make a context (they fail on my machine so it uses
>> the image backend anyway). Also without this switch weston clients
>> happily link with and run with the system cairo which has no gl backend.
>
> Yes.
>
>> Since I am trying to figure out working build instructions, I was
>> wondering what to do with this step:
>>
>> 1. Remove the compilation of pixmap & cairo
>
> I'm not sure why the Pixman manual build is there still. Maybe simply
> outdated, perhaps it was a dependency of the Cairo version required to
> have working cairo-gl.
>
>> 2. Add the --with-cairo=gl switch
>>
>> 3. It actually works without that switch, it's just that it is broken on
>> my machine where no egl works.
>
> I would be ok with just dropping the Cairo build instructions.
> Personally I think cairo-gl/cairo-glesv2 are not useful for Weston
> demos. You lose weston-gears and the screensaver, but I think those
> should be ported away from cairo-gl anyway.
>
> For reference:
> http://lists.freedesktop.org/archives/wayland-devel/2014-April/014538.html
>
> Summary: getting rid of cairo-egl (which is a requirement for cairo-gl
> and cairo-glesv2, so these would get rid of too) seems to be accepted,
> but the discussion on what should replace it is still open.
>
> In that light, I think dropping the cairo-gl/glesv2 build instructions
> would be nice, and it might kick the replacement issue discussion
> forward.

Okay I'll do that to my patch for the build instructions (did anybody 
see that, any opinions?)