Add analogue stick support for controllers in SDL2
Former-commit-id: b3ccff53ded59930a0fe997f1bbbf83fd5e356d8 Former-commit-id: c3c286d1fccf6d9fc5478cd9f6b13d6a7d670b4b
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@ -1,5 +1,6 @@
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use sdl2::keyboard::Scancode;
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use sdl2::controller::Axis;
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use sdl2::controller::Button;
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use sdl2::keyboard::Scancode;
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use rustboyadvance_core::keypad as gba_keypad;
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use rustboyadvance_core::InputInterface;
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@ -9,11 +10,12 @@ use bit::BitIndex;
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pub struct Sdl2Input {
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keyinput: u16,
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axis_keyinput: u16,
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}
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impl InputInterface for Sdl2Input {
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fn poll(&mut self) -> u16 {
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self.keyinput
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!(!self.keyinput | !self.axis_keyinput)
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}
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}
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@ -41,6 +43,31 @@ impl Sdl2Input {
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self.keyinput.set_bit(key as usize, true);
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}
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}
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pub fn on_axis_motion(&mut self, axis: Axis, val: i16) {
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use gba_keypad::Keys as GbaKeys;
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let keys = match axis {
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Axis::LeftX => (GbaKeys::Left, GbaKeys::Right),
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Axis::LeftY => (GbaKeys::Up, GbaKeys::Down),
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Axis::TriggerLeft => (GbaKeys::ButtonL, GbaKeys::ButtonL),
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Axis::TriggerRight => (GbaKeys::ButtonR, GbaKeys::ButtonR),
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_ => {
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return;
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}
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};
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// Axis motion is an absolute value in the range
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// [-32768, 32767]. Let's simulate a very rough dead
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// zone to ignore spurious events.
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let dead_zone = 10_000;
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if val > dead_zone || val < -dead_zone {
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let key = if val < 0 { keys.0 } else { keys.1 };
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self.axis_keyinput.set_bit(key as usize, false);
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} else {
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self.axis_keyinput.set_bit(keys.0 as usize, true);
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self.axis_keyinput.set_bit(keys.1 as usize, true);
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}
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}
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}
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fn scancode_to_keypad(scancode: Scancode) -> Option<gba_keypad::Keys> {
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@ -78,5 +105,6 @@ fn controller_button_to_keypad(button: Button) -> Option<gba_keypad::Keys> {
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pub fn create_input() -> Sdl2Input {
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Sdl2Input {
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keyinput: gba_keypad::KEYINPUT_ALL_RELEASED,
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axis_keyinput: gba_keypad::KEYINPUT_ALL_RELEASED,
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}
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}
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@ -193,7 +193,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
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canvas.set_logical_size(CANVAS_WIDTH, CANVAS_HEIGHT)?;
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let controller_subsystem = sdl_context.game_controller()?;
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let controller_mappings = include_str!("../../../external/SDL_GameControllerDB/gamecontrollerdb.txt");
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let controller_mappings =
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include_str!("../../../external/SDL_GameControllerDB/gamecontrollerdb.txt");
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controller_subsystem.load_mappings_from_read(&mut Cursor::new(controller_mappings))?;
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let available_controllers = (0..controller_subsystem.num_joysticks()?)
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@ -205,11 +206,11 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
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let controller = controller_subsystem.open(id)?;
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info!("Found game controller: {}", controller.name());
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Some(controller)
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},
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}
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_ => {
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info!("No game controllers were found");
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None
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},
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}
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};
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let mut rom_path = match matches.value_of("game_rom") {
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@ -320,10 +321,13 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
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},
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Event::ControllerButtonDown { button, .. } => {
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input.borrow_mut().on_controller_button_down(button);
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},
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}
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Event::ControllerButtonUp { button, .. } => {
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input.borrow_mut().on_controller_button_up(button);
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},
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}
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Event::ControllerAxisMotion { axis, value, .. } => {
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input.borrow_mut().on_axis_motion(axis, value);
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}
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Event::Quit { .. } => break 'running,
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Event::DropFile { filename, .. } => {
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// load the new rom
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