From: Juri Linkov <juri@jurta.org>
To: "Drew Adams" <drew.adams@oracle.com>
Cc: 4033@emacsbugs.donarmstrong.com
Subject: bug#4033: 23.1; list-colors-display is misleading
Date: Thu, 06 Aug 2009 00:35:43 +0300 [thread overview]
Message-ID: <87ws5i9c5s.fsf@mail.jurta.org> (raw)
In-Reply-To: <6875A66084B7406B8409F2C495A75D26@us.oracle.com> (Drew Adams's message of "Tue, 4 Aug 2009 19:25:26 -0700")
> What about something like this:
>
> (defun rgb-color-format-for-display ()
> (let ((ncolors (display-color-cells (selected-frame)))
> (exp 0))
> (while (> (lsh ncolors (- exp)) 1) (setq exp (1+ exp)))
> (setq exp (/ exp 12))
> (format "#%%0%dx%%0%dx%%0%dx" exp exp exp)))
>
> For 16777216 colors, that gives #%02x%02x%02x, which seems right.
>
> In `list-colors-print', we would then do this:
>
> (insert (apply 'format (rgb-color-format-for-display)
> (mapcar (lambda (c) (lsh c -8))
> (color-values (car color)))))
>
> IOW, replace the hard-coded "#%02x%02x%02x" with (rgb-color-format-for-display).
>
> But I guess Jason and Eli are saying that that wouldn't work or wouldn't be
> appropriate. It's still not clear to me.
I don't understand what is the reason to unnecessarily complicate this.
In your original report you said that one user had some confusion with
hex formats. Is this user using a system supporting more than 8 bits
per component?
--
Juri Linkov
http://www.jurta.org/emacs/
next prev parent reply other threads:[~2009-08-05 21:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-04 16:01 bug#4033: 23.1; list-colors-display is misleading Drew Adams
2009-08-04 18:04 ` Eli Zaretskii
2009-08-04 18:48 ` Drew Adams
2009-08-04 19:40 ` Drew Adams
2009-08-04 19:45 ` Eli Zaretskii
2009-08-04 19:58 ` Drew Adams
2009-08-04 22:59 ` Jason Rumney
2009-08-04 23:29 ` Drew Adams
2009-08-04 23:42 ` Jason Rumney
2009-08-04 23:55 ` Drew Adams
2009-08-05 3:22 ` Eli Zaretskii
2009-08-05 5:34 ` Drew Adams
2009-08-05 6:57 ` Jason Rumney
2009-08-05 17:34 ` Eli Zaretskii
2009-08-04 23:27 ` Andreas Schwab
2009-08-04 21:35 ` Juri Linkov
2009-08-04 23:29 ` Drew Adams
2009-08-05 2:25 ` Drew Adams
2009-08-05 2:58 ` Drew Adams
2009-08-05 21:35 ` Juri Linkov [this message]
2009-08-05 23:16 ` Drew Adams
2009-08-05 2:36 ` Drew Adams
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