From: Russ Cox <rsc@swtch.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] jpg image too big
Date: Tue, 20 Oct 2009 07:00:16 -0700 [thread overview]
Message-ID: <dd6fe68a0910200700g6e876655o53bb23274f335b11@mail.gmail.com> (raw)
In-Reply-To: <c40b3be607ba251b9b86acc785f70c8e@ladd.quanstro.net>
On Tue, Oct 20, 2009 at 5:04 AM, erik quanstrom <quanstro@quanstro.net> wrote:
> the problem is that devdraw/loadimage.c needs to load
> at least 1 scan line at a time. unfortunately, iounit for
> drawterm ends up being 8k, so display->bufsize=8k. the
> problem is that each scan line is over 9k in my case.
>
> i haven't looked yet to see if the kernel can deal with
> partial lines, or what could be done about the too-small
> iounit. but it would seem to me that something has to
> give.
you can handle this in loadimage by turning a single
call with too much data per scan line into multiple
calls, each delivering a fraction of a scan line
(there is a rectangle argument that says what subsection
of the image is being loaded).
russ
next prev parent reply other threads:[~2009-10-20 14:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-20 12:04 erik quanstrom
2009-10-20 14:00 ` Russ Cox [this message]
[not found] <<dd6fe68a0910200700g6e876655o53bb23274f335b11@mail.gmail.com>
2009-10-20 14:14 ` erik quanstrom
2009-10-20 14:55 ` Russ Cox
[not found] <<dd6fe68a0910200755nb397fc5jaef44a12fa3ad049@mail.gmail.com>
2009-10-20 15:04 ` erik quanstrom
2009-10-20 15:16 ` Russ Cox
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