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#ifndef RUBY_INPUT_JOYPAD_SDL
#define RUBY_INPUT_JOYPAD_SDL
struct InputJoypadSDL {
Input& input;
InputJoypadSDL(Input& input) : input(input) {}
struct Joypad {
shared_pointer<HID::Joypad> hid{new HID::Joypad};
unsigned id = 0;
SDL_Joystick* handle = nullptr;
};
vector<Joypad> joypads;
auto assign(shared_pointer<HID::Joypad> hid, unsigned groupID, unsigned inputID, int16_t value) -> void {
auto& group = hid->group(groupID);
if(group.input(inputID).value() == value) return;
input.doChange(hid, groupID, inputID, group.input(inputID).value(), value);
group.input(inputID).setValue(value);
}
auto poll(vector<shared_pointer<HID::Device>>& devices) -> void {
SDL_JoystickUpdate();
for(auto& jp : joypads) {
for(auto n : range(jp.hid->axes())) {
assign(jp.hid, HID::Joypad::GroupID::Axis, n, (int16_t)SDL_JoystickGetAxis(jp.handle, n));
}
for(signed n = 0; n < (signed)jp.hid->hats().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(auto n : range(jp.hid->buttons())) {
assign(jp.hid, HID::Joypad::GroupID::Button, n, (bool)SDL_JoystickGetButton(jp.handle, n));
}
devices.append(jp.hid);
}
}
auto init() -> bool {
SDL_InitSubSystem(SDL_INIT_JOYSTICK);
SDL_JoystickEventState(SDL_IGNORE);
for(auto id : range(SDL_NumJoysticks())) {
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->setID(3 + jp.id);
for(auto n : range(axes)) jp.hid->axes().append(n);
for(auto n : range(hats)) jp.hid->hats().append(n);
for(auto n : range(buttons)) jp.hid->buttons().append(n);
jp.hid->setRumble(false);
joypads.append(jp);
}
return true;
}
auto term() -> void {
for(auto& jp : joypads) {
SDL_JoystickClose(jp.handle);
}
joypads.reset();
SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
}
};
#endif
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