[BRLTTY] tmux screen driver.

[Dave Mielke]

Brltty now has a Tmux screen driver (its driver code is tx). It'd be an ideal replacement for those who are still using the old Screen screen driver.

Tmux supports full (RGB) colors, which inspired adding full color support to brltty. DESCCHAR will, if available, display descriptive full color names rather than just the basic VGA color names.

There's also a new COLOR command which has been bound to a long-press of a routing key. It displays just the colors (so no character name or value) but also includes the hexadecimal intensities of the color components. This additional part, depending on which color space is presented by the screen driver, looks like the following for the normal color:

   Light Gray on Black: VGA 07
   Light Gray on Black: RGB AAAAAA / 000000

As often happens, when we add a capability we also add a command to test it. In this case this new command is named colortest. It has a -h option. Have fun!

When you're using tmux you can run a second brltty that ues BrlaAPI just as you can already do with the AtSpi2 (a2) screen driver when using X. You can do it the very same way except that you need to specify the Tmux screen driver. Like this:

   brltty -xtx -bba

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