Re: [PATCH v2] Support 24-bit terminal colors.

[Eli Zaretskii]

> From: Rami Ylimäki <address@hidden>
> Date: Mon, 13 Feb 2017 00:53:47 +0200
> Cc: address@hidden
> 
>  . Please prepare a NEWS entry for this feature.
>  . It seems like you dropped the code to support the --color=
>  command-line argument, which was part of your original submission?
>  All the other color TTY modes support --color=NUM, so I think we
>  should also support --color=16777216, and perhaps also --color-24bit.
> 
> I'll write the NEWS entry but I'm afraid that fixing the --color=NUM option 
> would require too much effort right
> now.
> 
> The manual is too optimistic when it states that "Emacs might be able to turn 
> on a color mode for 8, 16, 88, or
> 256 as the value of NUM". In reality, only -1, 0 and 8 are supported. The 16, 
> 88, and 256 color modes can only
> be enabled based on current terminal capabilities and this is now true for 
> the 16M color mode as well.
> 
> The problems of handling --color=NUM can be seen when colors are downgraded, 
> because color and face
> pixel values aren't updated. For example, "M-x list-faces-display" produces 
> different results with "TERM=xterm
> emacs -Q -nw --color=8" and "TERM=xterm-256color emacs -Q -nw --color=8". 
> This is why I'd like to treat the
> --color option as a separate issue.

Fair enough, thanks.