Hi Pekka,
Thank you for reply!. We would like to understand the behavior of weston in
following use cases
Scenario 1: What is the Alpha value on weston composed output buffer
in following use case
Screen has only one surface and which has alpha '0'
[image: image.png]
Scenario 2: Screen has only one surface and which has alpha '255'
[image: image.png]
Scenario 3: Screen has two surfaces which has alpha given below
[image: image.png] ..
Thanks a lot for your support.
Thanks,
Ravi Sankar Namburi
On Wed, Feb 5, 2020 at 2:32 PM Pekka Paalanen <ppaala...@gmail.com> wrote:
> On Wed, 5 Feb 2020 13:28:10 +0530
> Raghu Kadari <raghuram0...@gmail.com> wrote:
>
> > Hi Paalanen,
> >
> > Thanks for the reply ! would like to confirm below.
> >
> > How can I check the Alpha channel of the final output of the weston.
> Is
> > there way I can check this information from the console?
>
> Hi,
>
> if you happen to be using GL-renderer, there is something like this in
> the log:
>
> [12:41:04.152] Chosen EGL config details: id: 6 rgba: 8 8 8 0 buf: 24
> dep: 0 stcl: 0 int: 1-1 type: win vis_id: XRGB8888 (0x34325258)
>
> However, that's only the renderer config. Even if it has an alpha
> channel, I think the DRM-backend will still substitute XRGB in the FB
> format since it knows the renderer produces an opaque image.
>
> Other than that, not in Weston I think.
>
> If you explained what you actually want to achieve, people might be
> able to offer you more helpful answers. Weston has been deliberately
> designed to produce an opaque image because we don't have see-through
> monitors.
>
>
> Thanks,
> pq
>
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