Hands On Projects For The Linux Graphics Subsystem Guide

Navigate to /sys/bus/pci/devices/ to find your graphics card.

Locate and open the primary graphics card node ( /dev/dri/card0 ).

Map the allocated buffer into user space via mmap to paint pixels. Hands On Projects For The Linux Graphics Subsystem

Offset=(x×(bits_per_pixel/8))+(y×line_length)Offset equals open paren x cross open paren bits_per_pixel / 8 close paren close paren plus open paren y cross line_length close paren

Project 2: Building a Minimalist Wayland Compositor with wlroots Navigate to /sys/bus/pci/devices/ to find your graphics card

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Before you start, familiarize yourself with these resources: Hands On Projects For The Linux Graphics Subsystem

Obtain the wl_shm (Shared Memory) allocator and wl_compositor objects.

: Write a program that directly writes to the /dev/fb0 video framebuffer. This simple project teaches you how to calculate pixel offsets and repaint screen pixels manually.