A boot splash, that uses lvgl to render the boot progress based on an interface, compatible with psplash.

The look of the application can be confiured at execution time via a config file (i.e. config.ini). Configurable aspects are:

• background (png) image
• progress bar
  • colors
  • layout (size, offset)

The configuration file can be given as the first parameter to the application.

An example configuration can be found under the data directory.

This Splash screen uses the same FIFO (i.e. $PSPLASH_FIFO_DIR/psplash_fifo), as psplash. It furthermore supports the same command-set (it currently ignores MSG though).

The application might be invoked as a service of Type=notify, as it will notify systemd about its ready state.

As this application is meant to be used in combination with psplash-systemd (part of https://git.yoctoproject.org/psplash). A suitable service might look like the following:

[Unit]
Description=Show Boot Screen
DefaultDependencies=no
# psplash creates its FIFO in the directory specified
# by environment variable `PSPLASH_FIFO_DIR`, `/run/` by default.
RequiresMountsFor=/run
Wants=psplash-systemd.service
Before=psplash-systemd.service

[Service]
Type=notify
# the configuration file (config.ini) is read from CWD.
WorkingDirectory=/usr/share/psplash-lvgl
ExecStart=/usr/bin/psplash-lvgl

[Install]
WantedBy=sysinit.target

In combination with psplash-systemd.service

[Unit]
Description=Send Boot Screen Updates
DefaultDependencies=no
RequiresMountsFor=/run

[Service]
Type=simple
ExecStart=/usr/bin/psplash-systemd

This bootsplash (currently) ignores:

• screen rotation
• screen clearance
• MSG commands

The application can use either the drm (default on cross builds, /dev/dri/card0) or fb (/dev/fb0) graphics backend. To use the framebuffer add -Dlv_drivers:display_backend=fb when configuring.

The project uses meson to configure.

meson setup --cross-file=/path/to/cross-file.meson --buildtype=release --strip -Dlv_drivers:display_backend=drm build
env DESTDIR=$(pwd)/build/sysroot ninja -C build install

It is possible to build the program for desktop. It requires the SDL2 library.

To build:

meson setup build && ninja -C build

For testing, customize the FIFO and config.ini locations:

# prepare run dir
mkdir run

# fifo in run subdir
PSPLASH_FIFO_DIR=$(pwd)/run ./build/psplash-lvgl ./data/config.ini &

# send messages to fifo
echo -e 'PROGRESS 20\0' > run/psplash_fifo

echo -e 'QUIT\0' > run/psplash_fifo