[Question] Reading the framebuffer

ddvk / remarkable2-framebuffer

remarkable2 framebuffer reversing

MIT License

279 stars 22 forks source link

Closed lfourquaux closed 3 years ago

lfourquaux commented 3 years ago

Is there a way, on a remarkable 2, to read the framebuffer when xochitl is running (in order to stream it to another device)?

Eeems commented 3 years ago

There is a pull request on reStream that does just that: https://github.com/rien/reStream/pull/31

raisjn commented 3 years ago

there are two ways (in this repo):

you can look at src/xofb for a standalone LD_PRELOAD shim (librm2fb_xofb) that will expose the framebuffer in /dev/shm
if you use the rm2fb server, when you hook xochitl with LD_PRELOAD of librm2fb_client, it will also expose the framebuffer in /dev/shm/

i believe people have had success with xofb and restream (by updating a few variables in reStream)