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Re: Display of undisplayable characters: \U01F3A8 instead of diamond

From: Gregory Heytings
Subject: Re: Display of undisplayable characters: \U01F3A8 instead of diamond
Date: Fri, 02 Sep 2022 15:45:19 +0000

I just checked again, and list-colors-display only lists eight colors in a raw Linux console.

What does display-color-cells return in that case?


Then I guess linux.el should call the same color setup code as xterm.el does in this case.

That's the value I get on my system, is it guaranteed to be the same on other systems?

Answering my own question: no. I just tried on another computer, with a similar kernel (5.17 instead of 5.18), and there display-color-cells returns 8. So I guess we use the most conservative value here. We could make the (xterm-register-default-colors xterm-standard-colors) call conditional to the return value of display-color-cells, though.

Answering my own suggestion: no. I just tried, and for some reason it doesn't work. Here's a screenshot of list-colors-display with (xterm-register-default-colors xterm-standard-colors) in lisp/term/linux.el. As you can see, bright colors and non-bright colors are displayed in the same way, and other colors are displayed wrongly. Perhaps there's another way, though.

Attachment: list-colors-display.png
Description: PNG image

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