From: Chong Yidong <cyd@stupidchicken.com>
To: Miles Bader <miles@gnu.org>
Cc: emacs-devel@gnu.org, Jason Rumney <jasonr@gnu.org>
Subject: Re: PNG image files with alpha channel
Date: Thu, 08 May 2008 22:35:52 -0400 [thread overview]
Message-ID: <87ve1o5hmf.fsf@stupidchicken.com> (raw)
In-Reply-To: <87tzh8yfdc.fsf@catnip.gol.com> (Miles Bader's message of "Fri, 09 May 2008 00:39:27 +0900")
Miles Bader <miles@gnu.org> writes:
> So the problem may in fact be something with the libpng 16-to-8-bit
> conversion code...
I found the error. When setting the background color, we must provide
it in the original bit-depth of the image, even if we call
png_set_strip_16. So, for 16-bit png images, it's just a matter of
supplying the background color at a 16-bit depth.
I've checked in a fix.
next prev parent reply other threads:[~2008-05-09 2:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-08 4:46 PNG image files with alpha channel Miles Bader
2008-05-08 11:48 ` Chong Yidong
2008-05-08 12:05 ` Jason Rumney
2008-05-08 15:02 ` Miles Bader
2008-05-08 15:18 ` Jason Rumney
2008-05-08 15:39 ` Miles Bader
2008-05-08 15:51 ` Jason Rumney
2008-05-08 18:19 ` Chong Yidong
2008-05-09 1:00 ` Chong Yidong
2008-05-09 1:10 ` Miles Bader
2008-05-09 2:35 ` Chong Yidong [this message]
2008-05-08 23:47 ` James Cloos
2008-05-09 0:43 ` Miles Bader
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