hdmistat/cmd/fbhello/README.md

fbhello

A simple "Hello World" framebuffer application demonstrating the hdmistat carousel and layout APIs.

Features

• Displays "Hello World" centered on the screen
• Shows current time updating at 1 FPS
• Shows uptime counter
• Decorative border around the display
• Falls back to terminal display if framebuffer is unavailable

Usage

# Run with framebuffer (requires appropriate permissions)
sudo ./fbhello

# Run with terminal display (if framebuffer fails)
./fbhello

Implementation

The application demonstrates:

1. Creating a custom screen that implements FrameGenerator
2. Using the layout API to draw text and borders
3. Setting up a carousel (though with only one screen)
4. Proper signal handling for clean shutdown
5. Fallback to terminal display when framebuffer is unavailable

Exit

Press Ctrl+C to exit the application.