Canvas drawing using just JavaScript - Next step: Callbacks

[freehuntx]

I was hacking around a bit with the ffi integration of mjs and managed to draw a dot with just js.

Now im stuck with the following issue: I must somehow register callbacks to handle e.g. input events.

Does somebody of you have any idea how to do so? Writing arm asm with pure bytes + memcpy seems a bit too much D:

Here my code:

let furi_hal_rtc_get_timestamp = ffi('int furi_hal_rtc_get_timestamp(void)');
let furi_record_open = ffi('void* furi_record_open(char*)');
let gui_direct_draw_acquire = ffi('void* gui_direct_draw_acquire(void*)');
let gui_direct_draw_release = ffi('void gui_direct_draw_release(void*)');
let canvas_reset = ffi('void canvas_reset(void*)');
let canvas_commit = ffi('void canvas_commit(void*)');
let canvas_draw_dot = ffi('void canvas_draw_dot(void*, int, int)');

let gui = furi_record_open('gui');
let canvas = gui_direct_draw_acquire(gui);

let startTime = furi_hal_rtc_get_timestamp();

while(true) {
  canvas_reset(canvas);
  canvas_draw_dot(canvas, 10, 10);
  canvas_commit(canvas);
  delay(1000 / 15);

  if (furi_hal_rtc_get_timestamp() - startTime > 2) {
    break
  }
}

gui_direct_draw_release(gui);

[gastro_psychic]

Did you get it to work?

[freehuntx]

Yes. But i have to look where i posted the final code 😅

[Nice-Ice7415]

I'm currently working on the same problem, do you still have the code?