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#ifndef RUBY_INPUT_JOYPAD_SDL
#define RUBY_INPUT_JOYPAD_SDL
namespace ruby {
struct InputJoypadSDL {
struct Joypad {
HID::Joypad hid;
unsigned id = 0;
SDL_Joystick* handle = nullptr;
};
vector<Joypad> joypads;
void assign(HID::Joypad& hid, unsigned groupID, unsigned inputID, int16_t value) {
auto& group = hid.group[groupID];
if(group.input[inputID].value == value) return;
if(input.onChange) input.onChange(hid, groupID, inputID, group.input[inputID].value, value);
group.input[inputID].value = value;
}
void poll(vector<HID::Device*>& devices) {
SDL_JoystickUpdate();
for(auto& jp : joypads) {
for(unsigned n = 0; n < jp.hid.axis().input.size(); n++) {
assign(jp.hid, HID::Joypad::GroupID::Axis, n, (int16_t)SDL_JoystickGetAxis(jp.handle, n));
}
for(signed n = 0; n < (signed)jp.hid.hat().input.size() - 1; n += 2) {
uint8_t state = SDL_JoystickGetHat(jp.handle, n >> 1);
assign(jp.hid, HID::Joypad::GroupID::Hat, n + 0, state & SDL_HAT_LEFT ? -32768 : state & SDL_HAT_RIGHT ? +32767 : 0);
assign(jp.hid, HID::Joypad::GroupID::Hat, n + 1, state & SDL_HAT_UP ? -32768 : state & SDL_HAT_DOWN ? +32767 : 0);
}
for(unsigned n = 0; n < jp.hid.button().input.size(); n++) {
assign(jp.hid, HID::Joypad::GroupID::Button, n, (bool)SDL_JoystickGetButton(jp.handle, n));
}
devices.append(&jp.hid);
}
}
bool init() {
SDL_InitSubSystem(SDL_INIT_JOYSTICK);
SDL_JoystickEventState(SDL_IGNORE);
unsigned joypadCount = SDL_NumJoysticks();
for(unsigned id = 0; id < joypadCount; id++) {
Joypad jp;
jp.id = id;
jp.handle = SDL_JoystickOpen(id);
unsigned axes = SDL_JoystickNumAxes(jp.handle);
unsigned hats = SDL_JoystickNumHats(jp.handle) * 2;
unsigned buttons = 32; //there is no SDL_JoystickNumButtons()
jp.hid.id = 2 + jp.id;
for(unsigned n = 0; n < axes; n++) jp.hid.axis().append({n});
for(unsigned n = 0; n < hats; n++) jp.hid.hat().append({n});
for(unsigned n = 0; n < buttons; n++) jp.hid.button().append({n});
jp.hid.rumble = false;
joypads.append(jp);
}
return true;
}
void term() {
for(auto& jp : joypads) {
SDL_JoystickClose(jp.handle);
}
joypads.reset();
SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
}
};
}
#endif
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