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using Silk.NET.Vulkan;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Graphics.Vulkan
{
public enum SpecConstType
{
Bool32,
Int16,
Int32,
Int64,
Float16,
Float32,
Float64
}
sealed class SpecDescription
{
public readonly SpecializationInfo Info;
public readonly SpecializationMapEntry[] Map;
// For mapping a simple packed struct or single entry
public SpecDescription(params (uint Id, SpecConstType Type)[] description)
{
int count = description.Length;
Map = new SpecializationMapEntry[count];
uint structSize = 0;
for (int i = 0; i < Map.Length; ++i)
{
var typeSize = SizeOf(description[i].Type);
Map[i] = new SpecializationMapEntry(description[i].Id, structSize, typeSize);
structSize += typeSize;
}
Info = new SpecializationInfo()
{
DataSize = structSize,
MapEntryCount = (uint)count
};
}
// For advanced mapping with overlapping or staggered fields
public SpecDescription(SpecializationMapEntry[] map)
{
Map = map;
uint structSize = 0;
for (int i = 0; i < map.Length; ++i)
{
structSize = Math.Max(structSize, map[i].Offset + (uint)map[i].Size);
}
Info = new SpecializationInfo()
{
DataSize = structSize,
MapEntryCount = (uint)map.Length
};
}
private static uint SizeOf(SpecConstType type) => type switch
{
SpecConstType.Int16 or SpecConstType.Float16 => 2,
SpecConstType.Bool32 or SpecConstType.Int32 or SpecConstType.Float32 => 4,
SpecConstType.Int64 or SpecConstType.Float64 => 8,
_ => throw new ArgumentOutOfRangeException(nameof(type))
};
private SpecDescription()
{
Info = new();
}
public static readonly SpecDescription Empty = new();
}
readonly struct SpecData : IRefEquatable<SpecData>
{
private readonly byte[] _data;
private readonly int _hash;
public int Length => _data.Length;
public ReadOnlySpan<byte> Span => _data.AsSpan();
public override int GetHashCode() => _hash;
public SpecData(ReadOnlySpan<byte> data)
{
_data = new byte[data.Length];
data.CopyTo(_data);
var hc = new HashCode();
hc.AddBytes(data);
_hash = hc.ToHashCode();
}
public override bool Equals(object obj) => obj is SpecData other && Equals(other);
public bool Equals(ref SpecData other) => _data.AsSpan().SequenceEqual(other._data);
}
}
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