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TSR Berry 2023-04-08 01:22:00 +02:00 • committed by Mary
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commit cee7121058
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src/Ryujinx.Graphics.Gpu/Image/TextureGroupHandle.cs Normal file
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using Ryujinx.Cpu.Tracking;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
namespace Ryujinx.Graphics.Gpu.Image
{
/// <summary>
/// A tracking handle for a texture group, which represents a range of views in a storage texture.
/// Retains a list of overlapping texture views, a modified flag, and tracking for each
/// CPU VA range that the views cover.
/// Also tracks copy dependencies for the handle - references to other handles that must be kept
/// in sync with this one before use.
/// </summary>
class TextureGroupHandle : IDisposable
{
private TextureGroup _group;
private int _bindCount;
private int _firstLevel;
private int _firstLayer;
// Sync state for texture flush.
/// <summary>
/// The sync number last registered.
/// </summary>
private ulong _registeredSync;
/// <summary>
/// The sync number when the texture was last modified by GPU.
/// </summary>
private ulong _modifiedSync;
/// <summary>
/// Whether a tracking action is currently registered or not. (0/1)
/// </summary>
private int _actionRegistered;
/// <summary>
/// Whether a sync action is currently registered or not.
/// </summary>
private bool _syncActionRegistered;
/// <summary>
/// The byte offset from the start of the storage of this handle.
/// </summary>
public int Offset { get; }
/// <summary>
/// The size in bytes covered by this handle.
/// </summary>
public int Size { get; }
/// <summary>
/// The base slice index for this handle.
/// </summary>
public int BaseSlice { get; }
/// <summary>
/// The number of slices covered by this handle.
/// </summary>
public int SliceCount { get; }
/// <summary>
/// The textures which this handle overlaps with.
/// </summary>
public List<Texture> Overlaps { get; }
/// <summary>
/// The CPU memory tracking handles that cover this handle.
/// </summary>
public CpuRegionHandle[] Handles { get; }
/// <summary>
/// True if a texture overlapping this handle has been modified. Is set false when the flush action is called.
/// </summary>
public bool Modified { get; set; }
/// <summary>
/// Dependencies to handles from other texture groups.
/// </summary>
public List<TextureDependency> Dependencies { get; }
/// <summary>
/// A flag indicating that a copy is required from one of the dependencies.
/// </summary>
public bool NeedsCopy => DeferredCopy != null;
/// <summary>
/// A data copy that must be acknowledged the next time this handle is used.
/// </summary>
public TextureGroupHandle DeferredCopy { get; set; }
/// <summary>
/// Create a new texture group handle, representing a range of views in a storage texture.
/// </summary>
/// <param name="group">The TextureGroup that the handle belongs to</param>
/// <param name="offset">The byte offset from the start of the storage of the handle</param>
/// <param name="size">The size in bytes covered by the handle</param>
/// <param name="views">All views of the storage texture, used to calculate overlaps</param>
/// <param name="firstLayer">The first layer of this handle in the storage texture</param>
/// <param name="firstLevel">The first level of this handle in the storage texture</param>
/// <param name="baseSlice">The base slice index of this handle</param>
/// <param name="sliceCount">The number of slices this handle covers</param>
/// <param name="handles">The memory tracking handles that cover this handle</param>
public TextureGroupHandle(TextureGroup group,
int offset,
ulong size,
List<Texture> views,
int firstLayer,
int firstLevel,
int baseSlice,
int sliceCount,
CpuRegionHandle[] handles)
{
_group = group;
_firstLayer = firstLayer;
_firstLevel = firstLevel;
Offset = offset;
Size = (int)size;
Overlaps = new List<Texture>();
Dependencies = new List<TextureDependency>();
BaseSlice = baseSlice;
SliceCount = sliceCount;
if (views != null)
{
RecalculateOverlaps(group, views);
}
Handles = handles;
}
/// <summary>
/// Calculate a list of which views overlap this handle.
/// </summary>
/// <param name="group">The parent texture group, used to find a view's base CPU VA offset</param>
/// <param name="views">The list of views to search for overlaps</param>
public void RecalculateOverlaps(TextureGroup group, List<Texture> views)
{
// Overlaps can be accessed from the memory tracking signal handler, so access must be atomic.
lock (Overlaps)
{
int endOffset = Offset + Size;
Overlaps.Clear();
foreach (Texture view in views)
{
int viewOffset = group.FindOffset(view);
if (viewOffset < endOffset && Offset < viewOffset + (int)view.Size)
{
Overlaps.Add(view);
}
}
}
}
/// <summary>
/// Adds a single texture view as an overlap if its range overlaps.
/// </summary>
/// <param name="offset">The offset of the view in the group</param>
/// <param name="view">The texture to add as an overlap</param>
public void AddOverlap(int offset, Texture view)
{
// Overlaps can be accessed from the memory tracking signal handler, so access must be atomic.
if (OverlapsWith(offset, (int)view.Size))
{
lock (Overlaps)
{
Overlaps.Add(view);
}
}
}
/// <summary>
/// Removes a single texture view as an overlap if its range overlaps.
/// </summary>
/// <param name="offset">The offset of the view in the group</param>
/// <param name="view">The texture to add as an overlap</param>
public void RemoveOverlap(int offset, Texture view)
{
// Overlaps can be accessed from the memory tracking signal handler, so access must be atomic.
if (OverlapsWith(offset, (int)view.Size))
{
lock (Overlaps)
{
Overlaps.Remove(view);
}
}
}
/// <summary>
/// Registers a sync action to happen for this handle, and an interim flush action on the tracking handle.
/// </summary>
/// <param name="context">The GPU context to register a sync action on</param>
private void RegisterSync(GpuContext context)
{
if (!_syncActionRegistered)
{
_modifiedSync = context.SyncNumber;
context.RegisterSyncAction(SyncAction, true);
_syncActionRegistered = true;
}
if (Interlocked.Exchange(ref _actionRegistered, 1) == 0)
{
_group.RegisterAction(this);
}
}
/// <summary>
/// Signal that this handle has been modified to any existing dependencies, and set the modified flag.
/// </summary>
/// <param name="context">The GPU context to register a sync action on</param>
public void SignalModified(GpuContext context)
{
Modified = true;
// If this handle has any copy dependencies, notify the other handle that a copy needs to be performed.
foreach (TextureDependency dependency in Dependencies)
{
dependency.SignalModified();
}
RegisterSync(context);
}
/// <summary>
/// Signal that this handle has either started or ended being modified.
/// </summary>
/// <param name="bound">True if this handle is being bound, false if unbound</param>
/// <param name="context">The GPU context to register a sync action on</param>
public void SignalModifying(bool bound, GpuContext context)
{
SignalModified(context);
// Note: Bind count currently resets to 0 on inherit for safety, as the handle <-> view relationship can change.
_bindCount = Math.Max(0, _bindCount + (bound ? 1 : -1));
}
/// <summary>
/// Synchronize dependent textures, if any of them have deferred a copy from this texture.
/// </summary>
public void SynchronizeDependents()
{
foreach (TextureDependency dependency in Dependencies)
{
TextureGroupHandle otherHandle = dependency.Other.Handle;
if (otherHandle.DeferredCopy == this)
{
otherHandle._group.Storage.SynchronizeMemory();
}
}
}
/// <summary>
/// Wait for the latest sync number that the texture handle was written to,
/// removing the modified flag if it was reached, or leaving it set if it has not yet been created.
/// </summary>
/// <param name="context">The GPU context used to wait for sync</param>
public void Sync(GpuContext context)
{
ulong registeredSync = _registeredSync;
long diff = (long)(context.SyncNumber - registeredSync);
if (diff > 0)
{
context.Renderer.WaitSync(registeredSync);
if ((long)(_modifiedSync - registeredSync) > 0)
{
// Flush the data in a previous state. Do not remove the modified flag - it will be removed to ignore following writes.
return;
}
Modified = false;
}
// If the difference is <= 0, no data is not ready yet. Flush any data we can without waiting or removing modified flag.
}
/// <summary>
/// Clears the action registered variable, indicating that the tracking action should be
/// re-registered on the next modification.
/// </summary>
public void ClearActionRegistered()
{
Interlocked.Exchange(ref _actionRegistered, 0);
}
/// <summary>
/// Action to perform when a sync number is registered after modification.
/// This action will register a read tracking action on the memory tracking handle so that a flush from CPU can happen.
/// </summary>
private void SyncAction()
{
// The storage will need to signal modified again to update the sync number in future.
_group.Storage.SignalModifiedDirty();
lock (Overlaps)
{
foreach (Texture texture in Overlaps)
{
texture.SignalModifiedDirty();
}
}
// Register region tracking for CPU? (again)
_registeredSync = _modifiedSync;
_syncActionRegistered = false;
if (Interlocked.Exchange(ref _actionRegistered, 1) == 0)
{
_group.RegisterAction(this);
}
}
/// <summary>
/// Signal that a copy dependent texture has been modified, and must have its data copied to this one.
/// </summary>
/// <param name="copyFrom">The texture handle that must defer a copy to this one</param>
public void DeferCopy(TextureGroupHandle copyFrom)
{
Modified = false;
DeferredCopy = copyFrom;
_group.Storage.SignalGroupDirty();
foreach (Texture overlap in Overlaps)
{
overlap.SignalGroupDirty();
}
}
/// <summary>
/// Create a copy dependency between this handle, and another.
/// </summary>
/// <param name="other">The handle to create a copy dependency to</param>
/// <param name="copyToOther">True if a copy should be deferred to all of the other handle's dependencies</param>
public void CreateCopyDependency(TextureGroupHandle other, bool copyToOther = false)
{
// Does this dependency already exist?
foreach (TextureDependency existing in Dependencies)
{
if (existing.Other.Handle == other)
{
// Do not need to create it again. May need to set the dirty flag.
return;
}
}
_group.HasCopyDependencies = true;
other._group.HasCopyDependencies = true;
TextureDependency dependency = new TextureDependency(this);
TextureDependency otherDependency = new TextureDependency(other);
dependency.Other = otherDependency;
otherDependency.Other = dependency;
Dependencies.Add(dependency);
other.Dependencies.Add(otherDependency);
// Recursively create dependency:
// All of this handle's dependencies must depend on the other.
foreach (TextureDependency existing in Dependencies.ToArray())
{
if (existing != dependency && existing.Other.Handle != other)
{
existing.Other.Handle.CreateCopyDependency(other);
}
}
// All of the other handle's dependencies must depend on this.
foreach (TextureDependency existing in other.Dependencies.ToArray())
{
if (existing != otherDependency && existing.Other.Handle != this)
{
existing.Other.Handle.CreateCopyDependency(this);
if (copyToOther)
{
existing.Other.Handle.DeferCopy(this);
}
}
}
}
/// <summary>
/// Remove a dependency from this handle's dependency list.
/// </summary>
/// <param name="dependency">The dependency to remove</param>
public void RemoveDependency(TextureDependency dependency)
{
Dependencies.Remove(dependency);
}
/// <summary>
/// Check if any of this handle's memory tracking handles are dirty.
/// </summary>
/// <returns>True if at least one of the handles is dirty</returns>
private bool CheckDirty()
{
return Handles.Any(handle => handle.Dirty);
}
/// <summary>
/// Perform a copy from the provided handle to this one, or perform a deferred copy if none is provided.
/// </summary>
/// <param name="context">GPU context to register sync for modified handles</param>
/// <param name="fromHandle">The handle to copy from. If not provided, this method will copy from and clear the deferred copy instead</param>
/// <returns>True if the copy was performed, false otherwise</returns>
public bool Copy(GpuContext context, TextureGroupHandle fromHandle = null)
{
bool result = false;
bool shouldCopy = false;
if (fromHandle == null)
{
fromHandle = DeferredCopy;
if (fromHandle != null)
{
// Only copy if the copy texture is still modified.
// It will be set as unmodified if new data is written from CPU, as the data previously in the texture will flush.
// It will also set as unmodified if a copy is deferred to it.
shouldCopy = fromHandle.Modified;
if (fromHandle._bindCount == 0)
{
// Repeat the copy in future if the bind count is greater than 0.
DeferredCopy = null;
}
}
}
else
{
// Copies happen directly when initializing a copy dependency.
// If dirty, do not copy. Its data no longer matters, and this handle should also be dirty.
// Also, only direct copy if the data in this handle is not already modified (can be set by copies from modified handles).
shouldCopy = !fromHandle.CheckDirty() && (fromHandle.Modified || !Modified);
}
if (shouldCopy)
{
Texture from = fromHandle._group.Storage;
Texture to = _group.Storage;
if (from.ScaleFactor != to.ScaleFactor)
{
to.PropagateScale(from);
}
from.HostTexture.CopyTo(
to.HostTexture,
fromHandle._firstLayer,
_firstLayer,
fromHandle._firstLevel,
_firstLevel);
if (fromHandle.Modified)
{
Modified = true;
RegisterSync(context);
}
result = true;
}
return result;
}
/// <summary>
/// Check if this handle has a dependency to a given texture group.
/// </summary>
/// <param name="group">The texture group to check for</param>
/// <returns>True if there is a dependency, false otherwise</returns>
public bool HasDependencyTo(TextureGroup group)
{
foreach (TextureDependency dep in Dependencies)
{
if (dep.Other.Handle._group == group)
{
return true;
}
}
return false;
}
/// <summary>
/// Inherit modified flags and dependencies from another texture handle.
/// </summary>
/// <param name="old">The texture handle to inherit from</param>
/// <param name="withCopies">Whether the handle should inherit copy dependencies or not</param>
public void Inherit(TextureGroupHandle old, bool withCopies)
{
Modified |= old.Modified;
if (withCopies)
{
foreach (TextureDependency dependency in old.Dependencies.ToArray())
{
CreateCopyDependency(dependency.Other.Handle);
if (dependency.Other.Handle.DeferredCopy == old)
{
dependency.Other.Handle.DeferredCopy = this;
}
}
DeferredCopy = old.DeferredCopy;
}
}
/// <summary>
/// Check if this region overlaps with another.
/// </summary>
/// <param name="address">Base address</param>
/// <param name="size">Size of the region</param>
/// <returns>True if overlapping, false otherwise</returns>
public bool OverlapsWith(int offset, int size)
{
return Offset < offset + size && offset < Offset + Size;
}
/// <summary>
/// Dispose this texture group handle, removing all its dependencies and disposing its memory tracking handles.
/// </summary>
public void Dispose()
{
foreach (CpuRegionHandle handle in Handles)
{
handle.Dispose();
}
foreach (TextureDependency dependency in Dependencies.ToArray())
{
dependency.Other.Handle.RemoveDependency(dependency.Other);
}
}
}
}