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Don't send controller gyro and accelerometer updates if the values haven't changed.

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This keeps SDL_PollEvent() from returning data continuously when polling controller state.
This commit is contained in:
Sam Lantinga 2020-11-17 22:09:52 -08:00
parent 463d84a860
commit 51ea6a6d44
1 changed files with 16 additions and 16 deletions
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6
src/joystick/SDL_joystick.c
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@ -2569,14 +2569,13 @@ int SDL_PrivateJoystickSensor(SDL_Joystick *joystick, SDL_SensorType type, const
if (sensor->type == type) {
if (sensor->enabled) {
/* Allow duplicate events, for things like gyro updates */
num_values = SDL_min(num_values, SDL_arraysize(sensor->data));
if (SDL_memcmp(data, sensor->data, num_values*sizeof(*data)) != 0) {
/* Update internal sensor state */
num_values = SDL_min(num_values, SDL_arraysize(sensor->data));
SDL_memcpy(sensor->data, data, num_values*sizeof(*data));
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_CONTROLLERSENSORUPDATE) == SDL_ENABLE) {
SDL_Event event;
@ -2590,6 +2589,7 @@ int SDL_PrivateJoystickSensor(SDL_Joystick *joystick, SDL_SensorType type, const
}
#endif /* !SDL_EVENTS_DISABLED */
}
}
break;
}
}