From: James Simmons <jsimmons@infradead.org>
To: Antonino Daplas <adaplas@pol.net>
Cc: Linux Fbdev development list
<linux-fbdev-devel@lists.sourceforge.net>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [Linux-fbdev-devel] fbdev changes.
Date: Fri, 18 Oct 2002 14:19:21 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.33.0210181400360.3591-100000@maxwell.earthlink.net> (raw)
In-Reply-To: <1034813995.563.32.camel@daplas>
> Hi James,
>
> Since you seem to be very busy, here's an idea for the framebuffer
> cursor API.
I looked over your patch and even tested it out. Then I thought about it a
long time. The question I had to ask myself is what do we want when we
have fbdev stand alone and fbdev with framebuffer console. Also how to use
a little code as possible (for embedded systems). So the goals are
1) For stand alone fbdev we want the maximum support for a cursor. But
what if we don't have a hardware cursor. In this case we should leave
it to userland to handle making it own cursor. The userland app might
not even want a cursor. So we avoid having extra code in the kernel for
a software cursor.
2) For fbcon the only thing we need for a cursor is a little rectangle. We
could still use imageblit but is seems really heavy when you consider
saving a bitmap of the current text under the cursor. True you have a
cost at reading the framebuffer when using fillrect but doesn't it cost
also to save the text bitmap under the cursor as well ? The question is
which cost more.
next prev parent reply other threads:[~2002-10-18 21:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-13 20:27 fbdev changes James Simmons
2002-10-13 22:51 ` Petr Vandrovec
2002-10-14 8:30 ` [Linux-fbdev-devel] " Geert Uytterhoeven
2002-10-13 21:32 ` Display driver Sunil Kumar T
2002-10-18 18:02 ` [Linux-fbdev-devel] Re: fbdev changes James Simmons
2002-10-14 18:47 ` [Linux-fbdev-devel] " Antonino Daplas
2002-10-14 20:46 ` Michel Dänzer
2002-10-18 17:29 ` James Simmons
2002-10-17 0:19 ` Antonino Daplas
2002-10-17 9:36 ` Geert Uytterhoeven
2002-10-18 21:19 ` James Simmons [this message]
2002-10-18 22:24 ` Antonino Daplas
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=Pine.LNX.4.33.0210181400360.3591-100000@maxwell.earthlink.net \
--to=jsimmons@infradead.org \
--cc=adaplas@pol.net \
--cc=linux-fbdev-devel@lists.sourceforge.net \
--cc=linux-kernel@vger.kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).