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using Ryujinx.Graphics.Shader.StructuredIr;
using System;
using System.Collections.Generic;
using System.Globalization;
namespace Ryujinx.Graphics.Shader.Translation
{
class ResourceManager
{
private static readonly string[] _stagePrefixes = new string[] { "cp", "vp", "tcp", "tep", "gp", "fp" };
private readonly IGpuAccessor _gpuAccessor;
private readonly ShaderProperties _properties;
private readonly string _stagePrefix;
private readonly int[] _cbSlotToBindingMap;
private readonly int[] _sbSlotToBindingMap;
private uint _sbSlotWritten;
private readonly Dictionary<int, int> _sbSlots;
private readonly Dictionary<int, int> _sbSlotsReverse;
private readonly HashSet<int> _usedConstantBufferBindings;
public ShaderProperties Properties => _properties;
public ResourceManager(ShaderStage stage, IGpuAccessor gpuAccessor, ShaderProperties properties)
{
_gpuAccessor = gpuAccessor;
_properties = properties;
_stagePrefix = GetShaderStagePrefix(stage);
_cbSlotToBindingMap = new int[18];
_sbSlotToBindingMap = new int[16];
_cbSlotToBindingMap.AsSpan().Fill(-1);
_sbSlotToBindingMap.AsSpan().Fill(-1);
_sbSlots = new Dictionary<int, int>();
_sbSlotsReverse = new Dictionary<int, int>();
_usedConstantBufferBindings = new HashSet<int>();
properties.AddConstantBuffer(0, new BufferDefinition(BufferLayout.Std140, 0, 0, "support_buffer", SupportBuffer.GetStructureType()));
}
public int GetConstantBufferBinding(int slot)
{
int binding = _cbSlotToBindingMap[slot];
if (binding < 0)
{
binding = _gpuAccessor.QueryBindingConstantBuffer(slot);
_cbSlotToBindingMap[slot] = binding;
string slotNumber = slot.ToString(CultureInfo.InvariantCulture);
AddNewConstantBuffer(binding, $"{_stagePrefix}_c{slotNumber}");
}
return binding;
}
public bool TryGetStorageBufferBinding(int sbCbSlot, int sbCbOffset, bool write, out int binding)
{
if (!TryGetSbSlot((byte)sbCbSlot, (ushort)sbCbOffset, out int slot))
{
binding = 0;
return false;
}
binding = _sbSlotToBindingMap[slot];
if (binding < 0)
{
binding = _gpuAccessor.QueryBindingStorageBuffer(slot);
_sbSlotToBindingMap[slot] = binding;
string slotNumber = slot.ToString(CultureInfo.InvariantCulture);
AddNewStorageBuffer(binding, $"{_stagePrefix}_s{slotNumber}");
}
if (write)
{
_sbSlotWritten |= 1u << slot;
}
return true;
}
private bool TryGetSbSlot(byte sbCbSlot, ushort sbCbOffset, out int slot)
{
int key = PackSbCbInfo(sbCbSlot, sbCbOffset);
if (!_sbSlots.TryGetValue(key, out slot))
{
slot = _sbSlots.Count;
if (slot >= _sbSlotToBindingMap.Length)
{
return false;
}
_sbSlots.Add(key, slot);
_sbSlotsReverse.Add(slot, key);
}
return true;
}
public bool TryGetConstantBufferSlot(int binding, out int slot)
{
for (slot = 0; slot < _cbSlotToBindingMap.Length; slot++)
{
if (_cbSlotToBindingMap[slot] == binding)
{
return true;
}
}
slot = 0;
return false;
}
public void SetUsedConstantBufferBinding(int binding)
{
_usedConstantBufferBindings.Add(binding);
}
public BufferDescriptor[] GetConstantBufferDescriptors()
{
var descriptors = new BufferDescriptor[_usedConstantBufferBindings.Count];
int descriptorIndex = 0;
for (int slot = 0; slot < _cbSlotToBindingMap.Length; slot++)
{
int binding = _cbSlotToBindingMap[slot];
if (binding >= 0 && _usedConstantBufferBindings.Contains(binding))
{
descriptors[descriptorIndex++] = new BufferDescriptor(binding, slot);
}
}
if (descriptors.Length != descriptorIndex)
{
Array.Resize(ref descriptors, descriptorIndex);
}
return descriptors;
}
public BufferDescriptor[] GetStorageBufferDescriptors()
{
var descriptors = new BufferDescriptor[_sbSlots.Count];
int descriptorIndex = 0;
foreach ((int key, int slot) in _sbSlots)
{
int binding = _sbSlotToBindingMap[slot];
if (binding >= 0)
{
(int sbCbSlot, int sbCbOffset) = UnpackSbCbInfo(key);
descriptors[descriptorIndex++] = new BufferDescriptor(binding, slot, sbCbSlot, sbCbOffset)
{
Flags = (_sbSlotWritten & (1u << slot)) != 0 ? BufferUsageFlags.Write : BufferUsageFlags.None
};
}
}
if (descriptors.Length != descriptorIndex)
{
Array.Resize(ref descriptors, descriptorIndex);
}
return descriptors;
}
private void AddNewConstantBuffer(int binding, string name)
{
StructureType type = new StructureType(new[]
{
new StructureField(AggregateType.Array | AggregateType.Vector4 | AggregateType.FP32, "data", Constants.ConstantBufferSize / 16)
});
_properties.AddConstantBuffer(binding, new BufferDefinition(BufferLayout.Std140, 0, binding, name, type));
}
private void AddNewStorageBuffer(int binding, string name)
{
StructureType type = new StructureType(new[]
{
new StructureField(AggregateType.Array | AggregateType.U32, "data", 0)
});
_properties.AddStorageBuffer(binding, new BufferDefinition(BufferLayout.Std430, 1, binding, name, type));
}
public static string GetShaderStagePrefix(ShaderStage stage)
{
uint index = (uint)stage;
if (index >= _stagePrefixes.Length)
{
return "invalid";
}
return _stagePrefixes[index];
}
private static int PackSbCbInfo(int sbCbSlot, int sbCbOffset)
{
return sbCbOffset | ((int)sbCbSlot << 16);
}
private static (int, int) UnpackSbCbInfo(int key)
{
return ((byte)(key >> 16), (ushort)key);
}
}
}
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