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From: | Kaushal Modi |
Subject: | Re: Black and white emacs -nw (WAS: Re: [PATCH v3 0/4] Support 24-bit terminal colors.) |
Date: | Sun, 19 Feb 2017 15:21:31 +0000 |
XTerm supports the direct color mode escape sequences, but approximates colors. See https://gist.github.com/XVilka/8346728#parsing-ansi-colour-sequences-but-approximating-them-to-256-palette and https://gist.github.com/XVilka/8346728#now-supporting-truecolour for details.Note that if you want to use XTerm, then using TERM=xterm-256color with Emacs is enough, because 24-bit colors are approximated anyway.
I did not do a full bootstrap. But it still seems to work in uxterm in tmux configured for 24-bits.But it doesn't work directly in an xterm terminal.What debug information can I provide from the direct xterm session or xterm+tmux session?I haven't used tmux before, but I was able to make Emacs work in direct color mode with following steps:
* Use a terminal that supports 24-bit colors (gnome-terminal).
* Compile tmux from https://github.com/tmux/tmux.git. The version provided with Ubuntu doesn't support Tc-flag.
* Use following terminfo source (add the Tc-flag and use semicolon separators for tmux):$ cat terminfo-24bit.src# Use semicolon separators.xterm-24bits|xterm with 24-bit direct color mode,use=xterm-256color,Tc,setb24=\E[48;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{255}%&%dm,setf24=\E[38;2;%p1%{65536}%/%d;%p1%{256}%/%{255}%&%d;%p1%{255}%&%dm,
* Compile the terminfo source, run tmux, set your TERM to xterm-24bits, check that Tc is supported:$ tmux info | grep Tc199: Tc: (flag) true* Finally run Emacs under tmux.
Kaushal Modi
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