/* * Get the number of buttons on a joystick */ int SDL_JoystickNumButtons(SDL_Joystick *joystick) { if ( ! ValidJoystick(&joystick) ) { return(-1); } return(joystick->nbuttons); }
/* * Get the number of trackballs on a joystick */ int SDL_JoystickNumBalls(SDL_Joystick *joystick) { if ( ! ValidJoystick(&joystick) ) { return(-1); } return(joystick->nballs); }
/* * Get the number of hats on a joystick */ int SDL_JoystickNumHats(SDL_Joystick *joystick) { if ( ! ValidJoystick(&joystick) ) { return(-1); } return(joystick->nhats); }
/* * Get the number of multi-dimensional axis controls on a joystick */ int SDL_JoystickNumAxes(SDL_Joystick *joystick) { if ( ! ValidJoystick(&joystick) ) { return(-1); } return(joystick->naxes); }
/* * Get the device index of an opened joystick. */ int SDL_JoystickIndex(SDL_Joystick *joystick) { if ( ! ValidJoystick(&joystick) ) { return(-1); } return(joystick->index); }
/* * Get the current state of a button on a joystick */ Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button) { Uint8 state; if ( ! ValidJoystick(&joystick) ) { return(0); } if ( button < joystick->nbuttons ) { state = joystick->buttons[button]; } else { SDL_SetError("Joystick only has %d buttons",joystick->nbuttons); state = 0; } return(state); }
/* * Get the current state of a hat on a joystick */ Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat) { Uint8 state; if ( ! ValidJoystick(&joystick) ) { return(0); } if ( hat < joystick->nhats ) { state = joystick->hats[hat]; } else { SDL_SetError("Joystick only has %d hats", joystick->nhats); state = 0; } return(state); }
/* * Get the current state of an axis control on a joystick */ Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis) { Sint16 state; if ( ! ValidJoystick(&joystick) ) { return(0); } if ( axis < joystick->naxes ) { state = joystick->axes[axis]; } else { SDL_SetError("Joystick only has %d axes", joystick->naxes); state = 0; } return(state); }
/* * Close a joystick previously opened with SDL_JoystickOpen() */ void SDL_JoystickClose(SDL_Joystick *joystick) { int i; if ( ! ValidJoystick(&joystick) ) { return; } /* First decrement ref count */ if ( --joystick->ref_count > 0 ) { return; } /* Lock the event queue - prevent joystick polling */ SDL_Lock_EventThread(); if ( joystick == default_joystick ) { default_joystick = NULL; } SDL_SYS_JoystickClose(joystick); /* Remove joystick from list */ for ( i=0; SDL_joysticks[i]; ++i ) { if ( joystick == SDL_joysticks[i] ) { memcpy(&SDL_joysticks[i], &SDL_joysticks[i+1], (SDL_numjoysticks-i)*sizeof(joystick)); break; } } /* Let the event thread keep running */ SDL_Unlock_EventThread(); /* Free the data associated with this joystick */ if ( joystick->axes ) { free(joystick->axes); } if ( joystick->hats ) { free(joystick->hats); } if ( joystick->balls ) { free(joystick->balls); } if ( joystick->buttons ) { free(joystick->buttons); } free(joystick); }
void SDL_JoystickClose(SDL_Joystick *joystick) { int i; if ( ! ValidJoystick(&joystick) ) { return; } if ( --joystick->ref_count > 0 ) { return; } SDL_Lock_EventThread(); SDL_SYS_JoystickClose(joystick); for ( i=0; SDL_joysticks[i]; ++i ) { if ( joystick == SDL_joysticks[i] ) { SDL_memmove(&SDL_joysticks[i], &SDL_joysticks[i+1], (SDL_allocatedjoysticks-i)*sizeof(joystick)); break; } } SDL_Unlock_EventThread(); if ( joystick->axes ) { SDL_free(joystick->axes); } if ( joystick->hats ) { SDL_free(joystick->hats); } if ( joystick->balls ) { SDL_free(joystick->balls); } if ( joystick->buttons ) { SDL_free(joystick->buttons); } SDL_free(joystick); }
/* * Get the ball axis change since the last poll */ int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy) { int retval; if ( ! ValidJoystick(&joystick) ) { return(-1); } retval = 0; if ( ball < joystick->nballs ) { if ( dx ) { *dx = joystick->balls[ball].dx; } if ( dy ) { *dy = joystick->balls[ball].dy; } joystick->balls[ball].dx = 0; joystick->balls[ball].dy = 0; } else { SDL_SetError("Joystick only has %d balls", joystick->nballs); retval = -1; } return(retval); }