crueter 9d60030af5 [android] Support Joy-Con D-pad buttons (#4225)
Closes eden-emulator/Issue-Reports#8
Closes eden-emulator/Issue-Reports#428

Currently, [Android's input layer](https://android.googlesource.com/platform/frameworks/base.git/+/refs/heads/android16-release/data/keyboards/Vendor_057e_Product_2009.kl#54) doesn't return `KEYCODE_DPAD_*` for the left Joy-Con, we fall back to the scan code in this case, this will also fix most third party Joy-Con controllers.

- The scan codes are not reliable and may vary from device to another. I searched for (0x220-0x223) values in the [android repo](https://android.googlesource.com/platform/frameworks/base.git/+/refs/heads/android16-release/data/keyboards) and they all have the same DPAD_* key mapping, so not a big issue just might cause future issues if Google change the mapping in another vendor. I could simply limit the fix to the [left Joy-Con](https://github.com/torvalds/linux/blob/master/drivers/hid/hid-ids.h#L1096-L1105) `if (event.keyCode == 0 && event.device.vendorId == 0x057e && event.device.productId == 0x2006)`.
- Auto mapping doesn't work, I'm not very familiar with the JNI Specification, I managed to implement the below workaround, it basically checks if it's the left Joy-Con and add the first four DPAD_* keycodes
  ```cpp
  // ./src/input_common/drivers/android.cpp
  ButtonMapping Android::GetButtonMappingForDevice(const Common::ParamPackage& params) {
      // ...
      const char *yuzu_device_name = env->GetStringUTFChars((jstring) env->CallObjectMethod(j_device, Common::Android::GetYuzuDeviceGetName()), &isCopy);
      const char *switch_left_string_name = "Nintendo Switch Left Joy-Con";
      bool is_switch_left = strncmp(yuzu_device_name, switch_left_string_name, strlen(switch_left_string_name)) == 0;

      std::set<s32> available_keys;
      for (size_t i = 0; i < keycode_ids.size(); ++i) {
          if (j_has_keys[i] || (is_switch_left && i <= 3)) {
              available_keys.insert(keycode_ids[i]);
          }
      }
      // ...
  }
  ```

Signed-off-by: crueter <crueter@eden-emu.dev>
Authored-by: Anas Bouzid <bouzid.anas.1@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4225
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>
2026-07-25 15:09:16 +02:00
2024-01-08 09:34:32 -05:00
2023-11-04 18:26:49 +00:00
2022-07-27 12:53:49 +02:00
2022-07-27 12:53:49 +02:00


Eden
Eden

Eden is a free and opensource (FOSS) Switch 1 emulator, derived from Yuzu and Sudachi - started by developer Camille LaVey. It's written in C++ with portability in mind, with builds for Windows, Linux, macOS, Android, FreeBSD and more.

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Compatibility

The emulator is capable of running most commercial games at full speed, provided you meet the necessary hardware requirements.

A list of supported games will be available in future. Please be patient.

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Eden is licensed under the GPLv3 (or any later version). Refer to the LICENSE.txt file.

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