FuriOS Terminal

Terminal project for the initramfs based on LVGL.

Usage

$ furios-terminal --help
Usage: furios-terminal [OPTION]

Mandatory arguments to long options are mandatory for short options too.
  -c, --config=PATH      Locaton of the main config file. Defaults to
                         /etc/furios-terminal.conf.
  -C, --config-override  Location of the config override file. Values in
                         this file override values for the same keys in the
                         main config file. If specified multiple times, the
                         values from consecutive files will be merged in
                         order.
  -g, --geometry=NxM     Force a display size of N horizontal times M
                         vertical pixels
  -d  --dpi=N            Overrides the DPI
  -h, --help             Print this message and exit
  -v, --verbose          Enable more detailed logging output on STDERR
  -V, --version          Print the furios-terminal version and exit

For an example configuration file, see [furios-terminal].

Development

Dependencies

• inih
• lvgl (git submodule / linked statically)
• lv_drivers (git submodule / linked statically)
• squeek2lvgl (git submodule / linked statically)
• libinput
• libxkbcommon
• libdrm (optional, required for the DRM backend)
• evdev kernel module

Building & running

Some of FuriOS Terminal's dependencies are included as git submodules in this repository. You can clone the repository and initialise the submodules with

$ git clone https://github.com/furilabs/furios-terminal.git
$ cd furios-terminal
$ git submodule init
$ git submodule update

When pulling changes from the remote later, either use git pull --recurse-submodules or manually run git submodule update as needed after pulling.

Once you have the sources, you can build the app and run it in a VT. Unless your user account has special privileges, sudo will be needed to access input device files.

$ meson _build
$ meson compile -C _build
$ sudo chvt 2
$ sudo ./_build/furios-terminal

With meson <0.55 use ninja instead of meson compile.

Optional features

If libdrm is installed, the DRM backend will be compiled automatically. It's possible to change this behaviour using the with-drm meson feature. For example,

$ meson _build -Dwith-drm=disabled

will forcibly disable the DRM backend regardless if libdrm is installed or not.

Backends

FuriOS Terminal supports multiple lvgl display drivers, which are herein referred as "backends".

Currently supported backends:

• fbdev
• drm (optional)
• minui (optional)

The backend can be switched at runtime by modifying the general.backend configuration.

Fonts

In order to work with LVGL, fonts need to be converted to bitmaps, stored as C arrays. FuriOS Terminal currently uses a combination of the OpenSans font for text and the FontAwesome font for pictograms. For both fonts only limited character ranges are included to reduce the binary size. To (re)generate the C file containing the combined font, run the following command

$ ./regenerate-fonts.sh

Below is a short explanation of the different unicode ranges used above.

• OpenSans
  • Basic Latin (0x0020-0x007F)
  • Latin-1 supplement (0x00A0-0x00FF)
  • Latin extended A (0x0100-0x017F)
  • Greek and Coptic (0x0370-0x03FF)
  • General punctuation (0x2000-0x206F)
  • Currency symbols (0x20A0-0x20CF)
  • Mathematical operators (0x2200-0x22FF)
• FontAwesome
  • Standard LV_SYMBOL_* glyphs (0xF001,0xF008,0xF00B,0xF00C,0xF00D,0xF011,0xF013,0xF015,0xF019,0xF01C,0xF021,0xF026,0xF027,0xF028,0xF03E,0xF0E0,0xF304,0xF043,0xF048,0xF04B,0xF04C,0xF04D,0xF051,0xF052,0xF053,0xF054,0xF067,0xF068,0xF06E,0xF070,0xF071,0xF074,0xF077,0xF078,0xF079,0xF07B,0xF093,0xF095,0xF0C4,0xF0C5,0xF0C7,0xF0C9,0xF0E7,0xF0EA,0xF0F3,0xF11C,0xF124,0xF158,0xF1EB,0xF240,0xF241,0xF242,0xF243,0xF244,0xF287,0xF293,0xF2ED,0xF55A,0xF7C2,0xF8A2)
  • adjust (0xF042)
  • arrow-alt-circle-up (0xF35B)
  • chevron-left (0xF053)

Keyboard layouts

FuriOS Terminal uses squeekboard layouts converted to C via squeek2lvgl. To regenerate the layouts, ensure that you have pipenv installed (e.g. via pip install --user pipenv) and then run

$ ./regenerate-layouts.sh

from the root of the repository.

License

FuriOS Terminal is licensed under the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

The OpenSans font is licensed under the Apache License 2.0.

The FontAwesome font is licensed under the Open Font License version 1.1.