Penumbra/Penumbra/Interop/Hooks/Meta/RspBustHook.cs

using OtterGui.Services;
using Penumbra.GameData.Enums;
using Penumbra.Interop.PathResolving;
using Penumbra.Meta;
using Penumbra.Meta.Files;
using Penumbra.Meta.Manipulations;

namespace Penumbra.Interop.Hooks.Meta;

public unsafe class RspBustHook : FastHook<RspBustHook.Delegate>
{
    public delegate float* Delegate(nint cmpResource, float* storage, Race race, byte gender, byte isSecondSubRace, byte bodyType,
        byte bustSize);

    private readonly MetaState       _metaState;
    private readonly MetaFileManager _metaFileManager;

    public RspBustHook(HookManager hooks, MetaState metaState, MetaFileManager metaFileManager)
    {
        _metaState       = metaState;
        _metaFileManager = metaFileManager;
        Task             = hooks.CreateHook<Delegate>("GetRspBust", "E8 ?? ?? ?? ?? F2 0F 10 44 24 ?? 8B 44 24", Detour, true);
    }

    private float* Detour(nint cmpResource, float* storage, Race race, byte gender, byte isSecondSubRace, byte bodyType, byte bustSize)
    {
        if (gender == 0)
        {
            storage[0] = 1f;
            storage[1] = 1f;
            storage[2] = 1f;
            return storage;
        }

        var ret = storage;
        if (bodyType < 2 && _metaState.RspCollection.TryPeek(out var collection) && collection is { Valid: true, ModCollection.MetaCache: { } cache })
        {
            var bustScale = bustSize / 100f;
            var clan      = (SubRace)(((int)race - 1) * 2 + 1 + isSecondSubRace);
            var ptr       = CmpFile.GetDefaults(_metaFileManager, clan, RspAttribute.BustMinX);
            storage[0] = GetValue(0, RspAttribute.BustMinX, RspAttribute.BustMaxX);
            storage[1] = GetValue(1, RspAttribute.BustMinY, RspAttribute.BustMaxY);
            storage[2] = GetValue(2, RspAttribute.BustMinZ, RspAttribute.BustMaxZ);

            [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
            float GetValue(int dimension, RspAttribute min, RspAttribute max)
            {
                var minValue = cache.Rsp.TryGetValue(new RspIdentifier(clan, min), out var minEntry)
                    ? minEntry.Entry.Value
                    : (ptr + dimension)->Value;
                var maxValue = cache.Rsp.TryGetValue(new RspIdentifier(clan, max), out var maxEntry)
                    ? maxEntry.Entry.Value
                    : (ptr + 3 + dimension)->Value;
                return (maxValue - minValue) * bustScale + minValue;
            }
        }
        else
        {
            ret = Task.Result.Original(cmpResource, storage, race, gender, isSecondSubRace, bodyType, bustSize);
        }

        Penumbra.Log.Excessive(
            $"[GetRspBust] Invoked on 0x{cmpResource:X} with {race}, {(Gender)(gender + 1)}, {isSecondSubRace == 1}, {bodyType}, {bustSize}, returned {storage[0]}, {storage[1]}, {storage[2]}.");
        return ret;
    }
}