ryujinx/Ryujinx.HLE/HOS/Services/Hid/IHidSystemServer.cs

using Ryujinx.Common.Logging;
using Ryujinx.HLE.HOS.Services.Hid.HidServer;
using Ryujinx.HLE.HOS.Services.Hid.Types;

namespace Ryujinx.HLE.HOS.Services.Hid
{
    [Service("hid:sys")]
    class IHidSystemServer : IpcService
    {
        public IHidSystemServer(ServiceCtx context) { }

        [CommandHipc(303)]
        // ApplyNpadSystemCommonPolicy(u64)
        public ResultCode ApplyNpadSystemCommonPolicy(ServiceCtx context)
        {
            ulong commonPolicy = context.RequestData.ReadUInt64();

            Logger.Stub?.PrintStub(LogClass.ServiceHid, new { commonPolicy });

            return ResultCode.Success;
        }

        [CommandHipc(306)]
        // GetLastActiveNpad(u32) -> u8, u8
        public ResultCode GetLastActiveNpad(ServiceCtx context)
        {
            // TODO: RequestData seems to have garbage data, reading an extra uint seems to fix the issue.
            context.RequestData.ReadUInt32();

            ResultCode resultCode = GetAppletFooterUiTypeImpl(context, out AppletFooterUiType appletFooterUiType);

            context.ResponseData.Write((byte)appletFooterUiType);
            context.ResponseData.Write((byte)0);

            return resultCode;
        }

        [CommandHipc(307)]
        // GetNpadSystemExtStyle() -> u64
        public ResultCode GetNpadSystemExtStyle(ServiceCtx context)
        {
            foreach (PlayerIndex playerIndex in context.Device.Hid.Npads.GetSupportedPlayers())
            {
                if (HidUtils.GetNpadIdTypeFromIndex(playerIndex) > NpadIdType.Handheld)
                {
                    return ResultCode.InvalidNpadIdType;
                }
            }

            context.ResponseData.Write((ulong)context.Device.Hid.Npads.SupportedStyleSets);

            return ResultCode.Success;
        }

        [CommandHipc(314)] // 9.0.0+
        // GetAppletFooterUiType(u32) -> u8
        public ResultCode GetAppletFooterUiType(ServiceCtx context)
        {
            ResultCode resultCode = GetAppletFooterUiTypeImpl(context, out AppletFooterUiType appletFooterUiType);

            context.ResponseData.Write((byte)appletFooterUiType);

            return resultCode;
        }

        private ResultCode GetAppletFooterUiTypeImpl(ServiceCtx context, out AppletFooterUiType appletFooterUiType)
        {
            NpadIdType  npadIdType  = (NpadIdType)context.RequestData.ReadUInt32();
            PlayerIndex playerIndex = HidUtils.GetIndexFromNpadIdType(npadIdType);

            appletFooterUiType = context.Device.Hid.SharedMemory.Npads[(int)playerIndex].InternalState.AppletFooterUiType;

            return ResultCode.Success;
        }
    }
}