The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Trusted Firmware-A (TF-A) is a reference implementation of secure world software for Arm A-Profile architectures (Armv8-A and Armv7-A), including an Exception Level 3 (EL3) Secure Monitor.
嵌入式AI画板 SDui-LVGL is a drawing board program based on the LVGL graphics framework, utilizing the stable diffusion API to call a remote server for text-to-image and image-to-image generation.