__                __             ______    ______  
                         |  \              |  \           /      \  /      \ 
 ______ ____    ______  _| $$_     ______   \$$ __    __ |  $$$$$$\|  $$$$$$\
|      \    \  |      \|   $$ \   /      \ |  \|  \  /  \| $$  | $$| $$___\$$
| $$$$$$\$$$$\  \$$$$$$\\$$$$$$  |  $$$$$$\| $$ \$$\/  $$| $$  | $$ \$$    \ 
| $$ | $$ | $$ /      $$ | $$ __ | $$   \$$| $$  >$$  $$ | $$  | $$ _\$$$$$$\
| $$ | $$ | $$|  $$$$$$$ | $$|  \| $$      | $$ /  $$$$\ | $$__/ $$|  \__| $$
| $$ | $$ | $$ \$$    $$  \$$  $$| $$      | $$|  $$ \$$\ \$$    $$ \$$    $$
\ $$  \$$  \$$  \$$$$$$$   \$$$$  \$$       \$$ \$$   \$$  \$$$$$$   \$$$$$$ 

by me, @cbialorucki, and @Jakedez

OS-like thing for HUB75 LED matrix panels (Teensy 4 + SmartLED Shield)

Library Credits

SmartMatrix

PNGdec [MUST USE VERSION 1.0.1, VERSION 1.0.2 DOES NOT WORK] and JPEGDEC

GifDecoder (depends on AnimatedGIF)

• FilenameFunctions, with some modifications, from GifDecoder example sketches

Teensy built-in libraries, notably USBHost_t36

Known Limitations

CLI

• Backspace is funny
• No scrolling or paging; text simply goes offscreen. Use cls or Ctrl+L to clear the screen.

Image Viewers

• PNGs get squashed to 16-bit color (RGB565) despite the format and libraries supporting better depths.
• JPEG files must have the extension .jpg (for now).
• Images larger than the screen resolution are not scaled to fit and may crash the system.

GIF Playback

• Not all files will successfully load, notably GIFs with interleaved frames (per GifDecoder docs). Files made with gifski's default settings are recommended and confirmed working.
• Transparent GIFs are not handled correctly; work around this by adding a black background to the file.
• GIFs larger than the screen resolution are not scaled to fit. Very high-res files may cause crashes.