From: "Devon H. O'Dell" <devon.odell@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Porter-Duff alpha blending
Date: Wed, 4 Mar 2009 17:22:21 -0500 [thread overview]
Message-ID: <9ab217670903041422t27ffc464j46b9ac1c2a976c06@mail.gmail.com> (raw)
In-Reply-To: <972ce83315a8e104ce34f039aaa2bfc6@coraid.com>
2009/3/4 erik quanstrom <quanstro@coraid.com>:
> okay. i've corrected my misfire on the picture. i've included
> α.gif gif encoding of the screen from plan 9 native on the 386
> α.png png "
> αpic.jpg a picture taken of the screen.
This is wrong -- the idea is that you have a single white bar all the
way down, a single red bar all the way down, a single green bar all
the way down, and a single blue bar all the way down. These are then
masked by the alpha channel so they appear to `fade to black'. Instead
of this, all your images show:
white bar, rendered correctly
blue bar, should be red
green / pink bar, should be green all the way down
red / cyan bar, should be blue all the way down
--dho
> - erik
next prev parent reply other threads:[~2009-03-04 22:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-04 21:32 erik quanstrom
2009-03-04 21:37 ` andrey mirtchovski
2009-03-04 21:42 ` andrey mirtchovski
2009-03-04 21:44 ` erik quanstrom
2009-03-04 21:53 ` andrey mirtchovski
2009-03-04 22:03 ` erik quanstrom
2009-03-04 22:21 ` andrey mirtchovski
2009-03-04 22:22 ` Devon H. O'Dell [this message]
2009-03-04 22:45 ` andrey mirtchovski
2009-03-04 22:59 ` erik quanstrom
2009-03-04 23:05 ` andrey mirtchovski
2009-03-04 23:58 ` Charles Forsyth
2009-03-05 1:04 ` erik quanstrom
2009-03-05 1:29 ` andrey mirtchovski
2009-03-05 2:07 ` andrey mirtchovski
2009-03-05 2:22 ` erik quanstrom
2009-03-06 3:21 ` andrey mirtchovski
2009-03-06 20:48 ` Russ Cox
2009-03-06 21:42 ` andrey mirtchovski
2009-03-08 22:33 ` Jeff Sickel
2009-03-09 15:28 ` Michaelian Ennis
2009-03-09 16:40 ` Jeff Sickel
2009-03-09 14:00 ` erik quanstrom
2009-03-09 15:32 ` yy
2009-03-04 21:53 erik quanstrom
2009-03-04 22:01 ` andrey mirtchovski
2009-03-05 18:31 maht
2009-03-04 21:18 ` andrey mirtchovski
2009-03-04 23:24 ` Russ Cox
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