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using Ryujinx.Graphics.Gpu.Memory;
using System.Collections.Generic;
namespace Ryujinx.Graphics.Gpu.Image
{
/// <summary>
/// Sampler pool.
/// </summary>
class SamplerPool : Pool<Sampler, SamplerDescriptor>, IPool<SamplerPool>
{
private float _forcedAnisotropy;
/// <summary>
/// Linked list node used on the sampler pool cache.
/// </summary>
public LinkedListNode<SamplerPool> CacheNode { get; set; }
/// <summary>
/// Timestamp used by the sampler pool cache, updated on every use of this sampler pool.
/// </summary>
public ulong CacheTimestamp { get; set; }
/// <summary>
/// Creates a new instance of the sampler pool.
/// </summary>
/// <param name="context">GPU context that the sampler pool belongs to</param>
/// <param name="physicalMemory">Physical memory where the sampler descriptors are mapped</param>
/// <param name="address">Address of the sampler pool in guest memory</param>
/// <param name="maximumId">Maximum sampler ID of the sampler pool (equal to maximum samplers minus one)</param>
public SamplerPool(GpuContext context, PhysicalMemory physicalMemory, ulong address, int maximumId) : base(context, physicalMemory, address, maximumId)
{
_forcedAnisotropy = GraphicsConfig.MaxAnisotropy;
}
/// <summary>
/// Gets the sampler with the given ID.
/// </summary>
/// <param name="id">ID of the sampler. This is effectively a zero-based index</param>
/// <returns>The sampler with the given ID</returns>
public override Sampler Get(int id)
{
if ((uint)id >= Items.Length)
{
return null;
}
if (SequenceNumber != Context.SequenceNumber)
{
if (_forcedAnisotropy != GraphicsConfig.MaxAnisotropy)
{
_forcedAnisotropy = GraphicsConfig.MaxAnisotropy;
for (int i = 0; i < Items.Length; i++)
{
if (Items[i] != null)
{
Items[i].Dispose();
Items[i] = null;
}
}
UpdateModifiedSequence();
}
SequenceNumber = Context.SequenceNumber;
SynchronizeMemory();
}
Sampler sampler = Items[id];
if (sampler == null)
{
SamplerDescriptor descriptor = GetDescriptor(id);
sampler = new Sampler(Context, descriptor);
Items[id] = sampler;
DescriptorCache[id] = descriptor;
}
return sampler;
}
/// <summary>
/// Checks if the pool was modified, and returns the last sequence number where a modification was detected.
/// </summary>
/// <returns>A number that increments each time a modification is detected</returns>
public int CheckModified()
{
if (SequenceNumber != Context.SequenceNumber)
{
SequenceNumber = Context.SequenceNumber;
if (_forcedAnisotropy != GraphicsConfig.MaxAnisotropy)
{
_forcedAnisotropy = GraphicsConfig.MaxAnisotropy;
for (int i = 0; i < Items.Length; i++)
{
if (Items[i] != null)
{
Items[i].Dispose();
Items[i] = null;
}
}
UpdateModifiedSequence();
}
SynchronizeMemory();
}
return ModifiedSequenceNumber;
}
/// <summary>
/// Implementation of the sampler pool range invalidation.
/// </summary>
/// <param name="address">Start address of the range of the sampler pool</param>
/// <param name="size">Size of the range being invalidated</param>
protected override void InvalidateRangeImpl(ulong address, ulong size)
{
ulong endAddress = address + size;
for (; address < endAddress; address += DescriptorSize)
{
int id = (int)((address - Address) / DescriptorSize);
Sampler sampler = Items[id];
if (sampler != null)
{
SamplerDescriptor descriptor = GetDescriptor(id);
// If the descriptors are the same, the sampler is still valid.
if (descriptor.Equals(ref DescriptorCache[id]))
{
continue;
}
sampler.Dispose();
Items[id] = null;
}
}
}
/// <summary>
/// Deletes a given sampler pool entry.
/// The host memory used by the sampler is released by the driver.
/// </summary>
/// <param name="item">The entry to be deleted</param>
protected override void Delete(Sampler item)
{
item?.Dispose();
}
}
}
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