Penumbra/Penumbra/Interop/CharacterUtility.DecalReverter.cs

using System;
using FFXIVClientStructs.FFXIV.Client.System.Resource;
using Penumbra.Collections;
using Penumbra.GameData.Enums;
using Penumbra.String.Classes;

namespace Penumbra.Interop;

public unsafe partial class CharacterUtility
{
    public sealed class DecalReverter : IDisposable
    {
        public static readonly Utf8GamePath DecalPath =
            Utf8GamePath.FromString( "chara/common/texture/decal_equip/_stigma.tex", out var p ) ? p : Utf8GamePath.Empty;

        public static readonly Utf8GamePath TransparentPath =
            Utf8GamePath.FromString( "chara/common/texture/transparent.tex", out var p ) ? p : Utf8GamePath.Empty;

        private readonly Structs.TextureResourceHandle* _decal;
        private readonly Structs.TextureResourceHandle* _transparent;

        public DecalReverter( ModCollection? collection, bool doDecal )
        {
            var ptr = Penumbra.CharacterUtility.Address;
            _decal       = null;
            _transparent = null;
            if( doDecal )
            {
                var decalPath   = collection?.ResolvePath( DecalPath )?.InternalName ?? DecalPath.Path;
                var decalHandle = Penumbra.ResourceLoader.ResolvePathSync( ResourceCategory.Chara, ResourceType.Tex, decalPath );
                _decal = ( Structs.TextureResourceHandle* )decalHandle;
                if( _decal != null )
                {
                    ptr->DecalTexResource = _decal;
                }
            }
            else
            {
                var transparentPath   = collection?.ResolvePath( TransparentPath )?.InternalName ?? TransparentPath.Path;
                var transparentHandle = Penumbra.ResourceLoader.ResolvePathSync( ResourceCategory.Chara, ResourceType.Tex, transparentPath );
                _transparent = ( Structs.TextureResourceHandle* )transparentHandle;
                if( _transparent != null )
                {
                    ptr->TransparentTexResource = _transparent;
                }
            }
        }

        public void Dispose()
        {
            var ptr = Penumbra.CharacterUtility.Address;
            if( _decal != null )
            {
                ptr->DecalTexResource = ( Structs.TextureResourceHandle* )Penumbra.CharacterUtility._defaultDecalResource;
                --_decal->Handle.RefCount;
            }

            if( _transparent != null )
            {
                ptr->TransparentTexResource = ( Structs.TextureResourceHandle* )Penumbra.CharacterUtility._defaultTransparentResource;
                --_transparent->Handle.RefCount;
            }
        }
    }
}