* bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working
@ 2018-02-12 2:09 Live System User
2018-02-12 15:51 ` Eli Zaretskii
2018-02-12 19:37 ` bug#30429: [PATCH] Improve FAQ about direct mode terminals Rami Ylimäki
0 siblings, 2 replies; 6+ messages in thread
From: Live System User @ 2018-02-12 2:09 UTC (permalink / raw
To: 30429
Hi,
The example in the "efaq" Info file gives the following
TERM=xterm-direct emacs -nw
When I execute this, as stated, I get an Emacs session
WITHOUT any colors -- even "M-x list-colors-display"
does not show any colors.
However, if I change this to the following, I see colors
displayed:
TERM=xterm-direct2 emacs -nw
[Note the "2" in "xterm-drect2"]
Here is the definition for the setab/setaf parameters for
each:
xterm-direct2:
# Emacs 26.1 and later support direct color mode in terminals, using a
# combination of user-defined capabilities and ncurses-dependent function
# calls. We will not include that here.
#
# Here is a first revision, which (disregarding the reuse of colors 1-7 which
# is of interest only to the numerically illiterate), is compatible with other
# terminal descriptions written for curses. It relies upon the extended range
# for numeric capabilities provided in ncurses 6.1:
xterm+direct2|xterm with direct-color indexing,
[...]
xterm-direct2|xterm with direct-color indexing (old),
use=xterm+direct2, use=xterm+titlestack, use=xterm,
[...]
setab=\E[%?%p1%{8}%<%t4%p1%d%e48\:2\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
setaf=\E[%?%p1%{8}%<%t3%p1%d%e38\:2\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
xterm-direct:
# That in turn had a problem: in the original patch submitted for KDE konsole
# in 2006, the submitter and the developer alike overlooked a "color space
# identifier" parameter. This version provides for that parameter:
xterm+direct|xterm with direct-color indexing,
[...]
setab=\E[%?%p1%{8}%<%t4%p1%d%e48\:2\:\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
setaf=\E[%?%p1%{8}%<%t3%p1%d%e38\:2\:\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
Between the two ("xterm-direct"and "xerm-direct2"), I see
the diffeence in at least "\:2\:\:" and "\:2\:".
respectively -- "xterm-direct" has an additioal "\:"
So, should Emacs be changed to accommadate the missing
parameter ("\:" as in "xterm-direct")??
Or should the information in "efaq" be changed to specify
"xterm-direct2"?
Or...?
Can anyone else confirm that colors are not displayed
in Emacs TTY when using TERMINFO's 6.1 definition of
"xterm-direct" (setab/setaf)?
Thanks.
In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.20.10)
of 2018-02-11 built on localhost.localdomain
Windowing system distributor 'Fedora Project', version 11.0.11803000
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^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working
2018-02-12 2:09 bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working Live System User
@ 2018-02-12 15:51 ` Eli Zaretskii
2018-02-12 16:38 ` Rami Ylimäki
2018-02-12 19:37 ` bug#30429: [PATCH] Improve FAQ about direct mode terminals Rami Ylimäki
1 sibling, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2018-02-12 15:51 UTC (permalink / raw
To: Live System User, Rami Ylimäki; +Cc: 30429
> From: Live System User <nyc4bos@aol.com>
> Date: Sun, 11 Feb 2018 21:09:40 -0500
>
> The example in the "efaq" Info file gives the following
>
> TERM=xterm-direct emacs -nw
>
> When I execute this, as stated, I get an Emacs session
> WITHOUT any colors -- even "M-x list-colors-display"
> does not show any colors.
>
> However, if I change this to the following, I see colors
> displayed:
>
> TERM=xterm-direct2 emacs -nw
>
> [Note the "2" in "xterm-drect2"]
>
> Here is the definition for the setab/setaf parameters for
> each:
>
>
>
> xterm-direct2:
>
> # Emacs 26.1 and later support direct color mode in terminals, using a
> # combination of user-defined capabilities and ncurses-dependent function
> # calls. We will not include that here.
> #
> # Here is a first revision, which (disregarding the reuse of colors 1-7 which
> # is of interest only to the numerically illiterate), is compatible with other
> # terminal descriptions written for curses. It relies upon the extended range
> # for numeric capabilities provided in ncurses 6.1:
> xterm+direct2|xterm with direct-color indexing,
> [...]
>
> xterm-direct2|xterm with direct-color indexing (old),
> use=xterm+direct2, use=xterm+titlestack, use=xterm,
> [...]
> setab=\E[%?%p1%{8}%<%t4%p1%d%e48\:2\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
> setaf=\E[%?%p1%{8}%<%t3%p1%d%e38\:2\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
>
>
>
>
>
> xterm-direct:
>
> # That in turn had a problem: in the original patch submitted for KDE konsole
> # in 2006, the submitter and the developer alike overlooked a "color space
> # identifier" parameter. This version provides for that parameter:
> xterm+direct|xterm with direct-color indexing,
> [...]
> setab=\E[%?%p1%{8}%<%t4%p1%d%e48\:2\:\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
> setaf=\E[%?%p1%{8}%<%t3%p1%d%e38\:2\:\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
>
>
>
>
>
>
> Between the two ("xterm-direct"and "xerm-direct2"), I see
> the diffeence in at least "\:2\:\:" and "\:2\:".
> respectively -- "xterm-direct" has an additioal "\:"
>
>
>
>
> So, should Emacs be changed to accommadate the missing
> parameter ("\:" as in "xterm-direct")??
>
> Or should the information in "efaq" be changed to specify
> "xterm-direct2"?
>
> Or...?
>
> Can anyone else confirm that colors are not displayed
> in Emacs TTY when using TERMINFO's 6.1 definition of
> "xterm-direct" (setab/setaf)?
Thanks for reporting this.
Rami, could you please take a look?
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working
2018-02-12 15:51 ` Eli Zaretskii
@ 2018-02-12 16:38 ` Rami Ylimäki
2018-02-12 17:48 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Rami Ylimäki @ 2018-02-12 16:38 UTC (permalink / raw
To: Live System User; +Cc: 30429
On 12.02.2018 17:51, Eli Zaretskii wrote:
>> From: Live System User <nyc4bos@aol.com>
>> Date: Sun, 11 Feb 2018 21:09:40 -0500
>>
>> The example in the "efaq" Info file gives the following
>>
>> TERM=xterm-direct emacs -nw
>>
>> When I execute this, as stated, I get an Emacs session
>> WITHOUT any colors -- even "M-x list-colors-display"
>> does not show any colors.
>>
>> However, if I change this to the following, I see colors
>> displayed:
>>
>> TERM=xterm-direct2 emacs -nw
>>
This is expected. Each direct mode TERM specification uses slightly
different seta[bf] string to display the colors. For example, currently
Gnome Terminal supports xterm-direct2 and iTerm2/XTerm support
xterm-direct. It's the user's responsibility to set TERM to something
that is supported by their terminal.
Emacs happens to be mentioned in the comment for xterm+direct2 in
Terminfo source file. However, this is just a coincidence and doesn't
mean that Emacs would have any connection with xterm-direct2. The
comment simply states that the non-standard set[bf]24 strings supported
by Emacs (before Terminfo added the standard capabilities) aren't added
to Terminfo as standard capabilities.
I chose to use xterm-direct in the FAQ, because Terminfo suggests that
seta[bf] strings of xterm-direct are the preferred way to display colors
in direct mode.
The bug here is that the FAQ could explain this more thoroughly, but
there's no bug in software.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working
2018-02-12 16:38 ` Rami Ylimäki
@ 2018-02-12 17:48 ` Eli Zaretskii
0 siblings, 0 replies; 6+ messages in thread
From: Eli Zaretskii @ 2018-02-12 17:48 UTC (permalink / raw
To: Rami Ylimäki; +Cc: 30429, nyc4bos
> Cc: Eli Zaretskii <eliz@gnu.org>, 30429@debbugs.gnu.org
> From: Rami Ylimäki <rami.ylimaki@vincit.fi>
> Date: Mon, 12 Feb 2018 18:38:14 +0200
>
> The bug here is that the FAQ could explain this more thoroughly, but
> there's no bug in software.
Can you propose a more detailed text for the FAQ?
Thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#30429: [PATCH] Improve FAQ about direct mode terminals.
2018-02-12 2:09 bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working Live System User
2018-02-12 15:51 ` Eli Zaretskii
@ 2018-02-12 19:37 ` Rami Ylimäki
2018-02-13 5:35 ` Eli Zaretskii
1 sibling, 1 reply; 6+ messages in thread
From: Rami Ylimäki @ 2018-02-12 19:37 UTC (permalink / raw
To: 30429
* doc/misc/efaq.texi (Colors on a TTY): Show how to list direct mode
TERM definitions. (Bug#30429)
---
doc/misc/efaq.texi | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/doc/misc/efaq.texi b/doc/misc/efaq.texi
index fef9b1051b..ffd833f832 100644
--- a/doc/misc/efaq.texi
+++ b/doc/misc/efaq.texi
@@ -1525,6 +1525,19 @@ Colors on a TTY
$ TERM=xterm-direct emacs -nw
@end example
+If your terminal is incompatible with XTerm, you may have to use
+another TERM definition.
+
+@example
+$ toe | grep '\-direct'
+
+konsole-direct konsole with direct-color indexing
+vte-direct vte with direct-color indexing
+st-direct st with direct-color indexing
+xterm-direct2 xterm with direct-color indexing (old)
+xterm-direct xterm with direct-color indexing
+@end example
+
Terminals with @samp{RGB} capability treat pixels #000001 - #000007 as
indexed colors to maintain backward compatibility with applications
that are unaware of direct color mode. Therefore the seven darkest
--
2.14.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* bug#30429: [PATCH] Improve FAQ about direct mode terminals.
2018-02-12 19:37 ` bug#30429: [PATCH] Improve FAQ about direct mode terminals Rami Ylimäki
@ 2018-02-13 5:35 ` Eli Zaretskii
0 siblings, 0 replies; 6+ messages in thread
From: Eli Zaretskii @ 2018-02-13 5:35 UTC (permalink / raw
To: Rami Ylimäki; +Cc: 30429-done
> From: Rami Ylimäki <rami.ylimaki@vincit.fi>
> Date: Mon, 12 Feb 2018 21:37:54 +0200
>
> * doc/misc/efaq.texi (Colors on a TTY): Show how to list direct mode
> TERM definitions. (Bug#30429)
Thanks, pushed to the master branch.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2018-02-12 2:09 bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working Live System User
2018-02-12 15:51 ` Eli Zaretskii
2018-02-12 16:38 ` Rami Ylimäki
2018-02-12 17:48 ` Eli Zaretskii
2018-02-12 19:37 ` bug#30429: [PATCH] Improve FAQ about direct mode terminals Rami Ylimäki
2018-02-13 5:35 ` Eli Zaretskii
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