ryujinx/Ryujinx.Graphics.Gpu/Image/AutoDeleteCache.cs
riperiperi b6e093b0fc
Force copy when auto-deleting a texture with dependencies (#2687)
When a texture is deleted by falling to the bottom of the AutoDeleteCache, its data is flushed to preserve any GPU writes that occurred. This ensures that the data appears in any textures recreated in the future, but didn't account for a texture that already existed with a copy dependency.

This change forces copy dependencies to complete if a texture falls out from from the AutoDeleteCache. (not removed via overlap, as that would be wasted effort)

Fixes broken lighting caused by pausing in SMO's Metro Kingdom. May fix some other issues.
2021-09-29 02:11:05 +02:00

118 lines
3.8 KiB
C#

using Ryujinx.Common.Logging;
using System.Collections;
using System.Collections.Generic;
namespace Ryujinx.Graphics.Gpu.Image
{
/// <summary>
/// A texture cache that automatically removes older textures that are not used for some time.
/// The cache works with a rotated list with a fixed size. When new textures are added, the
/// old ones at the bottom of the list are deleted.
/// </summary>
class AutoDeleteCache : IEnumerable<Texture>
{
private const int MaxCapacity = 2048;
private readonly LinkedList<Texture> _textures;
/// <summary>
/// Creates a new instance of the automatic deletion cache.
/// </summary>
public AutoDeleteCache()
{
_textures = new LinkedList<Texture>();
}
/// <summary>
/// Adds a new texture to the cache, even if the texture added is already on the cache.
/// </summary>
/// <remarks>
/// Using this method is only recommended if you know that the texture is not yet on the cache,
/// otherwise it would store the same texture more than once.
/// </remarks>
/// <param name="texture">The texture to be added to the cache</param>
public void Add(Texture texture)
{
texture.IncrementReferenceCount();
texture.CacheNode = _textures.AddLast(texture);
if (_textures.Count > MaxCapacity)
{
Texture oldestTexture = _textures.First.Value;
if (oldestTexture.IsModified && !oldestTexture.CheckModified(false))
{
// The texture must be flushed if it falls out of the auto delete cache.
// Flushes out of the auto delete cache do not trigger write tracking,
// as it is expected that other overlapping textures exist that have more up-to-date contents.
oldestTexture.Group.SynchronizeDependents(oldestTexture);
oldestTexture.Flush(false);
}
_textures.RemoveFirst();
oldestTexture.DecrementReferenceCount();
oldestTexture.CacheNode = null;
}
}
/// <summary>
/// Adds a new texture to the cache, or just moves it to the top of the list if the
/// texture is already on the cache.
/// </summary>
/// <remarks>
/// Moving the texture to the top of the list prevents it from being deleted,
/// as the textures on the bottom of the list are deleted when new ones are added.
/// </remarks>
/// <param name="texture">The texture to be added, or moved to the top</param>
public void Lift(Texture texture)
{
if (texture.CacheNode != null)
{
if (texture.CacheNode != _textures.Last)
{
_textures.Remove(texture.CacheNode);
texture.CacheNode = _textures.AddLast(texture);
}
}
else
{
Add(texture);
}
}
public bool Remove(Texture texture, bool flush)
{
if (texture.CacheNode == null)
{
return false;
}
// Remove our reference to this texture.
if (flush && texture.IsModified)
{
texture.Flush(false);
}
_textures.Remove(texture.CacheNode);
texture.CacheNode = null;
return texture.DecrementReferenceCount();
}
public IEnumerator<Texture> GetEnumerator()
{
return _textures.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return _textures.GetEnumerator();
}
}
}