From: Hans Verkuil <hverkuil@xs4all.nl>
To: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Cc: linux-media@vger.kernel.org
Subject: Re: VIVID bug in BGRA and ARGB
Date: Fri, 18 Dec 2015 01:04:31 +0100 [thread overview]
Message-ID: <56734D8F.2030209@xs4all.nl> (raw)
In-Reply-To: <1450393444.28544.3.camel@collabora.com>
On 12/18/2015 12:04 AM, Nicolas Dufresne wrote:
> Hi Hans,
>
> while testing over color formats VIVID produce, I found that BGRA and
> ARGB the alpha component is always 0, which leads to black frames when
> composed (when the background is black of course). Is that a bug, or
> intended ?
Depends who you ask, I guess.
Anyway, the alpha value can be set through a user control (Alpha Component),
which is indeed by default 0. I wonder if I should set it to 0x7f by default.
This still maps to 0 for 1-5-5-5 ARGB formats, though.
Suggestions are welcome.
Regards,
Hans
prev parent reply other threads:[~2015-12-18 0:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-17 23:04 VIVID bug in BGRA and ARGB Nicolas Dufresne
2015-12-18 0:04 ` Hans Verkuil [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56734D8F.2030209@xs4all.nl \
--to=hverkuil@xs4all.nl \
--cc=linux-media@vger.kernel.org \
--cc=nicolas.dufresne@collabora.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.