mirror of
https://github.com/Ryujinx/Ryujinx.git
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256 lines
8.8 KiB
C#
256 lines
8.8 KiB
C#
using System.Collections;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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namespace Ryujinx.Graphics.Gpu.Image
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{
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/// <summary>
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/// An entry on the short duration texture cache.
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/// </summary>
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class ShortTextureCacheEntry
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{
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public readonly TextureDescriptor Descriptor;
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public readonly int InvalidatedSequence;
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public readonly Texture Texture;
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/// <summary>
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/// Create a new entry on the short duration texture cache.
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/// </summary>
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/// <param name="descriptor">Last descriptor that referenced the texture</param>
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/// <param name="texture">The texture</param>
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public ShortTextureCacheEntry(TextureDescriptor descriptor, Texture texture)
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{
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Descriptor = descriptor;
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InvalidatedSequence = texture.InvalidatedSequence;
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Texture = texture;
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}
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}
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/// <summary>
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/// A texture cache that automatically removes older textures that are not used for some time.
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/// The cache works with a rotated list with a fixed size. When new textures are added, the
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/// old ones at the bottom of the list are deleted.
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/// </summary>
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class AutoDeleteCache : IEnumerable<Texture>
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{
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private const int MinCountForDeletion = 32;
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private const int MaxCapacity = 2048;
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private const ulong MaxTextureSizeCapacity = 512 * 1024 * 1024; // MB;
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private readonly LinkedList<Texture> _textures;
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private ulong _totalSize;
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private HashSet<ShortTextureCacheEntry> _shortCacheBuilder;
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private HashSet<ShortTextureCacheEntry> _shortCache;
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private Dictionary<TextureDescriptor, ShortTextureCacheEntry> _shortCacheLookup;
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/// <summary>
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/// Creates a new instance of the automatic deletion cache.
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/// </summary>
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public AutoDeleteCache()
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{
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_textures = new LinkedList<Texture>();
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_shortCacheBuilder = new HashSet<ShortTextureCacheEntry>();
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_shortCache = new HashSet<ShortTextureCacheEntry>();
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_shortCacheLookup = new Dictionary<TextureDescriptor, ShortTextureCacheEntry>();
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}
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/// <summary>
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/// Adds a new texture to the cache, even if the texture added is already on the cache.
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/// </summary>
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/// <remarks>
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/// Using this method is only recommended if you know that the texture is not yet on the cache,
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/// otherwise it would store the same texture more than once.
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/// </remarks>
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/// <param name="texture">The texture to be added to the cache</param>
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public void Add(Texture texture)
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{
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_totalSize += texture.Size;
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texture.IncrementReferenceCount();
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texture.CacheNode = _textures.AddLast(texture);
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if (_textures.Count > MaxCapacity ||
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(_totalSize > MaxTextureSizeCapacity && _textures.Count >= MinCountForDeletion))
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{
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RemoveLeastUsedTexture();
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}
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}
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/// <summary>
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/// Adds a new texture to the cache, or just moves it to the top of the list if the
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/// texture is already on the cache.
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/// </summary>
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/// <remarks>
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/// Moving the texture to the top of the list prevents it from being deleted,
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/// as the textures on the bottom of the list are deleted when new ones are added.
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/// </remarks>
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/// <param name="texture">The texture to be added, or moved to the top</param>
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public void Lift(Texture texture)
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{
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if (texture.CacheNode != null)
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{
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if (texture.CacheNode != _textures.Last)
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{
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_textures.Remove(texture.CacheNode);
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texture.CacheNode = _textures.AddLast(texture);
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}
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if (_totalSize > MaxTextureSizeCapacity && _textures.Count >= MinCountForDeletion)
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{
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RemoveLeastUsedTexture();
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}
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}
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else
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{
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Add(texture);
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}
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}
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/// <summary>
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/// Removes the least used texture from the cache.
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/// </summary>
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private void RemoveLeastUsedTexture()
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{
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Texture oldestTexture = _textures.First.Value;
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_totalSize -= oldestTexture.Size;
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if (!oldestTexture.CheckModified(false))
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{
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// The texture must be flushed if it falls out of the auto delete cache.
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// Flushes out of the auto delete cache do not trigger write tracking,
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// as it is expected that other overlapping textures exist that have more up-to-date contents.
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oldestTexture.Group.SynchronizeDependents(oldestTexture);
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oldestTexture.FlushModified(false);
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}
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_textures.RemoveFirst();
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oldestTexture.DecrementReferenceCount();
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oldestTexture.CacheNode = null;
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}
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/// <summary>
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/// Removes a texture from the cache.
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/// </summary>
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/// <param name="texture">The texture to be removed from the cache</param>
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/// <param name="flush">True to remove the texture if it was on the cache</param>
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/// <returns>True if the texture was found and removed, false otherwise</returns>
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public bool Remove(Texture texture, bool flush)
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{
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if (texture.CacheNode == null)
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{
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return false;
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}
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// Remove our reference to this texture.
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if (flush)
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{
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texture.FlushModified(false);
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}
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_textures.Remove(texture.CacheNode);
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_totalSize -= texture.Size;
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texture.CacheNode = null;
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return texture.DecrementReferenceCount();
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}
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/// <summary>
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/// Attempt to find a texture on the short duration cache.
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/// </summary>
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/// <param name="descriptor">The texture descriptor</param>
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/// <returns>The texture if found, null otherwise</returns>
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public Texture FindShortCache(in TextureDescriptor descriptor)
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{
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if (_shortCacheLookup.Count > 0 && _shortCacheLookup.TryGetValue(descriptor, out var entry))
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{
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if (entry.InvalidatedSequence == entry.Texture.InvalidatedSequence)
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{
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return entry.Texture;
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}
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else
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{
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_shortCacheLookup.Remove(descriptor);
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}
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}
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return null;
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}
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/// <summary>
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/// Removes a texture from the short duration cache.
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/// </summary>
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/// <param name="texture">Texture to remove from the short cache</param>
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public void RemoveShortCache(Texture texture)
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{
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bool removed = _shortCache.Remove(texture.ShortCacheEntry);
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removed |= _shortCacheBuilder.Remove(texture.ShortCacheEntry);
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if (removed)
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{
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texture.DecrementReferenceCount();
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_shortCacheLookup.Remove(texture.ShortCacheEntry.Descriptor);
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texture.ShortCacheEntry = null;
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}
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}
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/// <summary>
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/// Adds a texture to the short duration cache.
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/// It starts in the builder set, and it is moved into the deletion set on next process.
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/// </summary>
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/// <param name="texture">Texture to add to the short cache</param>
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/// <param name="descriptor">Last used texture descriptor</param>
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public void AddShortCache(Texture texture, ref TextureDescriptor descriptor)
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{
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var entry = new ShortTextureCacheEntry(descriptor, texture);
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_shortCacheBuilder.Add(entry);
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_shortCacheLookup.Add(entry.Descriptor, entry);
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texture.ShortCacheEntry = entry;
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texture.IncrementReferenceCount();
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}
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/// <summary>
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/// Delete textures from the short duration cache.
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/// Moves the builder set to be deleted on next process.
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/// </summary>
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public void ProcessShortCache()
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{
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HashSet<ShortTextureCacheEntry> toRemove = _shortCache;
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foreach (var entry in toRemove)
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{
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entry.Texture.DecrementReferenceCount();
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_shortCacheLookup.Remove(entry.Descriptor);
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entry.Texture.ShortCacheEntry = null;
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}
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toRemove.Clear();
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_shortCache = _shortCacheBuilder;
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_shortCacheBuilder = toRemove;
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}
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public IEnumerator<Texture> GetEnumerator()
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{
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return _textures.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return _textures.GetEnumerator();
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}
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}
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} |