Penumbra/Penumbra/Interop/Structs/MtrlResource.cs

using System.Runtime.InteropServices;

namespace Penumbra.Interop.Structs;

[StructLayout( LayoutKind.Explicit )]
public unsafe struct MtrlResource
{
    [FieldOffset( 0x00 )]
    public ResourceHandle Handle;

    [FieldOffset( 0xC8 )]
    public ShaderPackageResourceHandle* ShpkResourceHandle;

    [FieldOffset( 0xD0 )]
    public TextureEntry* TexSpace; // Contains the offsets for the tex files inside the string list.

    [FieldOffset( 0xE0 )]
    public byte* StringList;

    [FieldOffset( 0xF8 )]
    public ushort ShpkOffset;

    [FieldOffset( 0xFA )]
    public byte NumTex;

    public byte* ShpkString
        => StringList + ShpkOffset;

    public byte* TexString( int idx )
        => StringList + TexSpace[idx].PathOffset;

    public bool TexIsDX11( int idx )
        => TexSpace[idx].Flags >= 0x8000;

    [StructLayout(LayoutKind.Explicit, Size = 0x10)]
    public struct TextureEntry
    {
        [FieldOffset( 0x00 )]
        public TextureResourceHandle* ResourceHandle;

        [FieldOffset( 0x08 )]
        public ushort PathOffset;

        [FieldOffset( 0x0A )]
        public ushort Flags;
    }
}