Thanks! I'm on it! This is SDL3 (still kinda experimental) on Emscripten (an estabilished absolute mess) but there must be a way to fix this.
Fixed! Fun fact: I had to DISABLE hiDPI support in SDL. Guess is bugged.
Are you sure you haven't forgot about multiplying the event coords by SDL_GetWindowPixelDensity?
SDL_GetWindowPixelDensity
Oooh! Didn't know about this. Neither SDL_GetGlobalMouseState nor SDL_MouseMotionEvent docs speak of no such thing. Anyways, it works now :P
