Droidboot API
ABM version 0.3 introduced a universal api to have single gui, lvgl, config parser etc. across all devices. That is achieved by having a separated droidboot_gui, bootloader, and HAL (hardware abstraction layer) that implements common functionality needed to use ABM. Here is the list of function you should implement to get ABM running on your bootloader.
droidboot_internal_get_display_height
{{{int droidboot_internal_get_display_height()}}} Should return display height in pixels
droidboot_internal_get_display_width
{{{int droidboot_internal_get_display_width()}}} Should return display width in pixels