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using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.OpenGL.Image;
using System;
using System.Collections.Generic;
namespace Ryujinx.Graphics.OpenGL
{
class DisposedTexture
{
public TextureCreateInfo Info;
public TextureView View;
public float ScaleFactor;
public int RemainingFrames;
}
/// <summary>
/// A structure for pooling resources that can be reused without recreation, such as textures.
/// </summary>
class ResourcePool : IDisposable
{
private const int DisposedLiveFrames = 2;
private readonly object _lock = new();
private readonly Dictionary<TextureCreateInfo, List<DisposedTexture>> _textures = new();
/// <summary>
/// Add a texture that is not being used anymore to the resource pool to be used later.
/// Both the texture's view and storage should be completely unused.
/// </summary>
/// <param name="view">The texture's view</param>
public void AddTexture(TextureView view)
{
lock (_lock)
{
if (!_textures.TryGetValue(view.Info, out List<DisposedTexture> list))
{
list = new List<DisposedTexture>();
_textures.Add(view.Info, list);
}
list.Add(new DisposedTexture()
{
Info = view.Info,
View = view,
ScaleFactor = view.ScaleFactor,
RemainingFrames = DisposedLiveFrames
});
}
}
/// <summary>
/// Attempt to obtain a texture from the resource cache with the desired parameters.
/// </summary>
/// <param name="info">The creation info for the desired texture</param>
/// <param name="scaleFactor">The scale factor for the desired texture</param>
/// <returns>A TextureView with the description specified, or null if one was not found.</returns>
public TextureView GetTextureOrNull(TextureCreateInfo info, float scaleFactor)
{
lock (_lock)
{
if (!_textures.TryGetValue(info, out List<DisposedTexture> list))
{
return null;
}
foreach (DisposedTexture texture in list)
{
if (scaleFactor == texture.ScaleFactor)
{
list.Remove(texture);
return texture.View;
}
}
return null;
}
}
/// <summary>
/// Update the pool, removing any resources that have expired.
/// </summary>
public void Tick()
{
lock (_lock)
{
foreach (List<DisposedTexture> list in _textures.Values)
{
for (int i = 0; i < list.Count; i++)
{
DisposedTexture tex = list[i];
if (--tex.RemainingFrames < 0)
{
tex.View.Dispose();
list.RemoveAt(i--);
}
}
}
}
}
/// <summary>
/// Disposes the resource pool.
/// </summary>
public void Dispose()
{
lock (_lock)
{
foreach (List<DisposedTexture> list in _textures.Values)
{
foreach (DisposedTexture texture in list)
{
texture.View.Dispose();
}
}
_textures.Clear();
}
}
}
}
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