rjx-mirror/Ryujinx.Graphics.Gpu/Image/TextureGroup.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

997 lines
38 KiB
C#

using Ryujinx.Cpu.Tracking;
using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.Gpu.Memory;
using Ryujinx.Graphics.Texture;
using Ryujinx.Memory.Range;
using System;
using System.Collections.Generic;
namespace Ryujinx.Graphics.Gpu.Image
{
/// <summary>
/// A texture group represents a group of textures that belong to the same storage.
/// When views are created, this class will track memory accesses for them separately.
/// The group iteratively adds more granular tracking as views of different kinds are added.
/// Note that a texture group can be absorbed into another when it becomes a view parent.
/// </summary>
class TextureGroup : IDisposable
{
private delegate void HandlesCallbackDelegate(int baseHandle, int regionCount, bool split = false);
/// <summary>
/// The storage texture associated with this group.
/// </summary>
public Texture Storage { get; }
/// <summary>
/// Indicates if the texture has copy dependencies. If true, then all modifications
/// must be signalled to the group, rather than skipping ones still to be flushed.
/// </summary>
public bool HasCopyDependencies { get; set; }
private readonly GpuContext _context;
private readonly PhysicalMemory _physicalMemory;
private int[] _allOffsets;
private int[] _sliceSizes;
private bool _is3D;
private bool _hasMipViews;
private bool _hasLayerViews;
private int _layers;
private int _levels;
private MultiRange TextureRange => Storage.Range;
/// <summary>
/// The views list from the storage texture.
/// </summary>
private List<Texture> _views;
private TextureGroupHandle[] _handles;
private bool[] _loadNeeded;
/// <summary>
/// Create a new texture group.
/// </summary>
/// <param name="context">GPU context that the texture group belongs to</param>
/// <param name="physicalMemory">Physical memory where the <paramref name="storage"/> texture is mapped</param>
/// <param name="storage">The storage texture for this group</param>
public TextureGroup(GpuContext context, PhysicalMemory physicalMemory, Texture storage)
{
Storage = storage;
_context = context;
_physicalMemory = physicalMemory;
_is3D = storage.Info.Target == Target.Texture3D;
_layers = storage.Info.GetSlices();
_levels = storage.Info.Levels;
}
/// <summary>
/// Initialize a new texture group's dirty regions and offsets.
/// </summary>
/// <param name="size">Size info for the storage texture</param>
/// <param name="hasLayerViews">True if the storage will have layer views</param>
/// <param name="hasMipViews">True if the storage will have mip views</param>
public void Initialize(ref SizeInfo size, bool hasLayerViews, bool hasMipViews)
{
_allOffsets = size.AllOffsets;
_sliceSizes = size.SliceSizes;
(_hasLayerViews, _hasMipViews) = PropagateGranularity(hasLayerViews, hasMipViews);
RecalculateHandleRegions();
}
/// <summary>
/// Check and optionally consume the dirty flags for a given texture.
/// The state is shared between views of the same layers and levels.
/// </summary>
/// <param name="texture">The texture being used</param>
/// <param name="consume">True to consume the dirty flags and reprotect, false to leave them as is</param>
/// <returns>True if a flag was dirty, false otherwise</returns>
public bool CheckDirty(Texture texture, bool consume)
{
bool dirty = false;
EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
{
for (int i = 0; i < regionCount; i++)
{
TextureGroupHandle group = _handles[baseHandle + i];
foreach (CpuRegionHandle handle in group.Handles)
{
if (handle.Dirty)
{
if (consume)
{
handle.Reprotect();
}
dirty = true;
}
}
}
});
return dirty;
}
/// <summary>
/// Synchronize memory for a given texture.
/// If overlapping tracking handles are dirty, fully or partially synchronize the texture data.
/// </summary>
/// <param name="texture">The texture being used</param>
public void SynchronizeMemory(Texture texture)
{
EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
{
bool dirty = false;
bool anyModified = false;
bool anyUnmapped = false;
for (int i = 0; i < regionCount; i++)
{
TextureGroupHandle group = _handles[baseHandle + i];
bool modified = group.Modified;
bool handleDirty = false;
bool handleModified = false;
bool handleUnmapped = false;
foreach (CpuRegionHandle handle in group.Handles)
{
if (handle.Dirty)
{
handle.Reprotect();
handleDirty = true;
}
else
{
handleUnmapped |= handle.Unmapped;
handleModified |= modified;
}
}
// Evaluate if any copy dependencies need to be fulfilled. A few rules:
// If the copy handle needs to be synchronized, prefer our own state.
// If we need to be synchronized and there is a copy present, prefer the copy.
if (group.NeedsCopy && group.Copy())
{
anyModified |= true; // The copy target has been modified.
handleDirty = false;
}
else
{
anyModified |= handleModified;
dirty |= handleDirty;
}
anyUnmapped |= handleUnmapped;
if (group.NeedsCopy)
{
// The texture we copied from is still being written to. Copy from it again the next time this texture is used.
texture.SignalGroupDirty();
}
_loadNeeded[baseHandle + i] = handleDirty && !handleUnmapped;
}
if (dirty)
{
if (anyUnmapped || (_handles.Length > 1 && (anyModified || split)))
{
// Partial texture invalidation. Only update the layers/levels with dirty flags of the storage.
SynchronizePartial(baseHandle, regionCount);
}
else
{
// Full texture invalidation.
texture.SynchronizeFull();
}
}
});
}
/// <summary>
/// Synchronize part of the storage texture, represented by a given range of handles.
/// Only handles marked by the _loadNeeded array will be synchronized.
/// </summary>
/// <param name="baseHandle">The base index of the range of handles</param>
/// <param name="regionCount">The number of handles to synchronize</param>
private void SynchronizePartial(int baseHandle, int regionCount)
{
for (int i = 0; i < regionCount; i++)
{
if (_loadNeeded[baseHandle + i])
{
var info = GetHandleInformation(baseHandle + i);
int offsetIndex = info.Index;
// Only one of these will be greater than 1, as partial sync is only called when there are sub-image views.
for (int layer = 0; layer < info.Layers; layer++)
{
for (int level = 0; level < info.Levels; level++)
{
int offset = _allOffsets[offsetIndex];
int endOffset = (offsetIndex + 1 == _allOffsets.Length) ? (int)Storage.Size : _allOffsets[offsetIndex + 1];
int size = endOffset - offset;
ReadOnlySpan<byte> data = _physicalMemory.GetSpan(Storage.Range.GetSlice((ulong)offset, (ulong)size));
data = Storage.ConvertToHostCompatibleFormat(data, info.BaseLevel, true);
Storage.SetData(data, info.BaseLayer, info.BaseLevel);
offsetIndex++;
}
}
}
}
}
/// <summary>
/// Synchronize dependent textures, if any of them have deferred a copy from the given texture.
/// </summary>
/// <param name="texture">The texture to synchronize dependents of</param>
public void SynchronizeDependents(Texture texture)
{
EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
{
for (int i = 0; i < regionCount; i++)
{
TextureGroupHandle group = _handles[baseHandle + i];
group.SynchronizeDependents();
}
});
}
/// <summary>
/// Signal that a texture in the group has been modified by the GPU.
/// </summary>
/// <param name="texture">The texture that has been modified</param>
/// <param name="registerAction">True if the flushing read action should be registered, false otherwise</param>
public void SignalModified(Texture texture, bool registerAction)
{
EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
{
for (int i = 0; i < regionCount; i++)
{
TextureGroupHandle group = _handles[baseHandle + i];
group.SignalModified();
if (registerAction)
{
RegisterAction(group);
}
}
});
}
/// <summary>
/// Signal that a texture in the group is actively bound, or has been unbound by the GPU.
/// </summary>
/// <param name="texture">The texture that has been modified</param>
/// <param name="bound">True if this texture is being bound, false if unbound</param>
/// <param name="registerAction">True if the flushing read action should be registered, false otherwise</param>
public void SignalModifying(Texture texture, bool bound, bool registerAction)
{
EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
{
for (int i = 0; i < regionCount; i++)
{
TextureGroupHandle group = _handles[baseHandle + i];
group.SignalModifying(bound);
if (registerAction)
{
RegisterAction(group);
}
}
});
}
/// <summary>
/// Register a read/write action to flush for a texture group.
/// </summary>
/// <param name="group">The group to register an action for</param>
public void RegisterAction(TextureGroupHandle group)
{
foreach (CpuRegionHandle handle in group.Handles)
{
handle.RegisterAction((address, size) => FlushAction(group, address, size));
}
}
/// <summary>
/// Propagates the mip/layer view flags depending on the texture type.
/// When the most granular type of subresource has views, the other type of subresource must be segmented granularly too.
/// </summary>
/// <param name="hasLayerViews">True if the storage has layer views</param>
/// <param name="hasMipViews">True if the storage has mip views</param>
/// <returns>The input values after propagation</returns>
private (bool HasLayerViews, bool HasMipViews) PropagateGranularity(bool hasLayerViews, bool hasMipViews)
{
if (_is3D)
{
hasMipViews |= hasLayerViews;
}
else
{
hasLayerViews |= hasMipViews;
}
return (hasLayerViews, hasMipViews);
}
/// <summary>
/// Evaluate the range of tracking handles which a view texture overlaps with.
/// </summary>
/// <param name="texture">The texture to get handles for</param>
/// <param name="callback">
/// A function to be called with the base index of the range of handles for the given texture, and the number of handles it covers.
/// This can be called for multiple disjoint ranges, if required.
/// </param>
private void EvaluateRelevantHandles(Texture texture, HandlesCallbackDelegate callback)
{
if (texture == Storage || !(_hasMipViews || _hasLayerViews))
{
callback(0, _handles.Length);
return;
}
EvaluateRelevantHandles(texture.FirstLayer, texture.FirstLevel, texture.Info.GetSlices(), texture.Info.Levels, callback);
}
/// <summary>
/// Evaluate the range of tracking handles which a view texture overlaps with,
/// using the view's position and slice/level counts.
/// </summary>
/// <param name="firstLayer">The first layer of the texture</param>
/// <param name="firstLevel">The first level of the texture</param>
/// <param name="slices">The slice count of the texture</param>
/// <param name="levels">The level count of the texture</param>
/// <param name="callback">
/// A function to be called with the base index of the range of handles for the given texture, and the number of handles it covers.
/// This can be called for multiple disjoint ranges, if required.
/// </param>
private void EvaluateRelevantHandles(int firstLayer, int firstLevel, int slices, int levels, HandlesCallbackDelegate callback)
{
int targetLayerHandles = _hasLayerViews ? slices : 1;
int targetLevelHandles = _hasMipViews ? levels : 1;
if (_is3D)
{
// Future mip levels come after all layers of the last mip level. Each mipmap has less layers (depth) than the last.
if (!_hasLayerViews)
{
// When there are no layer views, the mips are at a consistent offset.
callback(firstLevel, targetLevelHandles);
}
else
{
(int levelIndex, int layerCount) = Get3DLevelRange(firstLevel);
if (levels > 1 && slices < _layers)
{
// The given texture only covers some of the depth of multiple mips. (a "depth slice")
// Callback with each mip's range separately.
// Can assume that the group is fully subdivided (both slices and levels > 1 for storage)
while (levels-- > 1)
{
callback(firstLayer + levelIndex, slices);
levelIndex += layerCount;
layerCount = Math.Max(layerCount >> 1, 1);
slices = Math.Max(layerCount >> 1, 1);
}
}
else
{
int totalSize = Math.Min(layerCount, slices);
while (levels-- > 1)
{
layerCount = Math.Max(layerCount >> 1, 1);
totalSize += layerCount;
}
callback(firstLayer + levelIndex, totalSize);
}
}
}
else
{
// Future layers come after all mipmaps of the last.
int levelHandles = _hasMipViews ? _levels : 1;
if (slices > 1 && levels < _levels)
{
// The given texture only covers some of the mipmaps of multiple slices. (a "mip slice")
// Callback with each layer's range separately.
// Can assume that the group is fully subdivided (both slices and levels > 1 for storage)
for (int i = 0; i < slices; i++)
{
callback(firstLevel + (firstLayer + i) * levelHandles, targetLevelHandles, true);
}
}
else
{
callback(firstLevel + firstLayer * levelHandles, targetLevelHandles + (targetLayerHandles - 1) * levelHandles);
}
}
}
/// <summary>
/// Get the range of offsets for a given mip level of a 3D texture.
/// </summary>
/// <param name="level">The level to return</param>
/// <returns>Start index and count of offsets for the given level</returns>
private (int Index, int Count) Get3DLevelRange(int level)
{
int index = 0;
int count = _layers; // Depth. Halves with each mip level.
while (level-- > 0)
{
index += count;
count = Math.Max(count >> 1, 1);
}
return (index, count);
}
/// <summary>
/// Get view information for a single tracking handle.
/// </summary>
/// <param name="handleIndex">The index of the handle</param>
/// <returns>The layers and levels that the handle covers, and its index in the offsets array</returns>
private (int BaseLayer, int BaseLevel, int Levels, int Layers, int Index) GetHandleInformation(int handleIndex)
{
int baseLayer;
int baseLevel;
int levels = _hasMipViews ? 1 : _levels;
int layers = _hasLayerViews ? 1 : _layers;
int index;
if (_is3D)
{
if (_hasLayerViews)
{
// NOTE: Will also have mip views, or only one level in storage.
index = handleIndex;
baseLevel = 0;
int levelLayers = _layers;
while (handleIndex >= levelLayers)
{
handleIndex -= levelLayers;
baseLevel++;
levelLayers = Math.Max(levelLayers >> 1, 1);
}
baseLayer = handleIndex;
}
else
{
baseLayer = 0;
baseLevel = handleIndex;
(index, _) = Get3DLevelRange(baseLevel);
}
}
else
{
baseLevel = _hasMipViews ? handleIndex % _levels : 0;
baseLayer = _hasMipViews ? handleIndex / _levels : handleIndex;
index = baseLevel + baseLayer * _levels;
}
return (baseLayer, baseLevel, levels, layers, index);
}
/// <summary>
/// Gets the layer and level for a given view.
/// </summary>
/// <param name="index">The index of the view</param>
/// <returns>The layer and level of the specified view</returns>
private (int BaseLayer, int BaseLevel) GetLayerLevelForView(int index)
{
if (_is3D)
{
int baseLevel = 0;
int levelLayers = _layers;
while (index >= levelLayers)
{
index -= levelLayers;
baseLevel++;
levelLayers = Math.Max(levelLayers >> 1, 1);
}
return (index, baseLevel);
}
else
{
return (index / _levels, index % _levels);
}
}
/// <summary>
/// Find the byte offset of a given texture relative to the storage.
/// </summary>
/// <param name="texture">The texture to locate</param>
/// <returns>The offset of the texture in bytes</returns>
public int FindOffset(Texture texture)
{
return _allOffsets[GetOffsetIndex(texture.FirstLayer, texture.FirstLevel)];
}
/// <summary>
/// Find the offset index of a given layer and level.
/// </summary>
/// <param name="layer">The view layer</param>
/// <param name="level">The view level</param>
/// <returns>The offset index of the given layer and level</returns>
public int GetOffsetIndex(int layer, int level)
{
if (_is3D)
{
return layer + Get3DLevelRange(level).Index;
}
else
{
return level + layer * _levels;
}
}
/// <summary>
/// The action to perform when a memory tracking handle is flipped to dirty.
/// This notifies overlapping textures that the memory needs to be synchronized.
/// </summary>
/// <param name="groupHandle">The handle that a dirty flag was set on</param>
private void DirtyAction(TextureGroupHandle groupHandle)
{
// Notify all textures that belong to this handle.
Storage.SignalGroupDirty();
lock (groupHandle.Overlaps)
{
foreach (Texture overlap in groupHandle.Overlaps)
{
overlap.SignalGroupDirty();
}
}
}
/// <summary>
/// Generate a CpuRegionHandle for a given address and size range in CPU VA.
/// </summary>
/// <param name="address">The start address of the tracked region</param>
/// <param name="size">The size of the tracked region</param>
/// <returns>A CpuRegionHandle covering the given range</returns>
private CpuRegionHandle GenerateHandle(ulong address, ulong size)
{
return _physicalMemory.BeginTracking(address, size);
}
/// <summary>
/// Generate a TextureGroupHandle covering a specified range of views.
/// </summary>
/// <param name="viewStart">The start view of the handle</param>
/// <param name="views">The number of views to cover</param>
/// <returns>A TextureGroupHandle covering the given views</returns>
private TextureGroupHandle GenerateHandles(int viewStart, int views)
{
int offset = _allOffsets[viewStart];
int endOffset = (viewStart + views == _allOffsets.Length) ? (int)Storage.Size : _allOffsets[viewStart + views];
int size = endOffset - offset;
var result = new List<CpuRegionHandle>();
for (int i = 0; i < TextureRange.Count; i++)
{
MemoryRange item = TextureRange.GetSubRange(i);
int subRangeSize = (int)item.Size;
int sliceStart = Math.Clamp(offset, 0, subRangeSize);
int sliceEnd = Math.Clamp(endOffset, 0, subRangeSize);
if (sliceStart != sliceEnd)
{
result.Add(GenerateHandle(item.Address + (ulong)sliceStart, (ulong)(sliceEnd - sliceStart)));
}
offset -= subRangeSize;
endOffset -= subRangeSize;
if (endOffset <= 0)
{
break;
}
}
(int firstLayer, int firstLevel) = GetLayerLevelForView(viewStart);
if (_hasLayerViews && _hasMipViews)
{
size = _sliceSizes[firstLevel];
}
var groupHandle = new TextureGroupHandle(this, _allOffsets[viewStart], (ulong)size, _views, firstLayer, firstLevel, result.ToArray());
foreach (CpuRegionHandle handle in result)
{
handle.RegisterDirtyEvent(() => DirtyAction(groupHandle));
}
return groupHandle;
}
/// <summary>
/// Update the views in this texture group, rebuilding the memory tracking if required.
/// </summary>
/// <param name="views">The views list of the storage texture</param>
public void UpdateViews(List<Texture> views)
{
// This is saved to calculate overlapping views for each handle.
_views = views;
bool layerViews = _hasLayerViews;
bool mipViews = _hasMipViews;
bool regionsRebuilt = false;
if (!(layerViews && mipViews))
{
foreach (Texture view in views)
{
if (view.Info.GetSlices() < _layers)
{
layerViews = true;
}
if (view.Info.Levels < _levels)
{
mipViews = true;
}
}
(layerViews, mipViews) = PropagateGranularity(layerViews, mipViews);
if (layerViews != _hasLayerViews || mipViews != _hasMipViews)
{
_hasLayerViews = layerViews;
_hasMipViews = mipViews;
RecalculateHandleRegions();
regionsRebuilt = true;
}
}
if (!regionsRebuilt)
{
// Must update the overlapping views on all handles, but only if they were not just recreated.
foreach (TextureGroupHandle handle in _handles)
{
handle.RecalculateOverlaps(this, views);
}
}
Storage.SignalGroupDirty();
foreach (Texture texture in views)
{
texture.SignalGroupDirty();
}
}
/// <summary>
/// Inherit handle state from an old set of handles, such as modified and dirty flags.
/// </summary>
/// <param name="oldHandles">The set of handles to inherit state from</param>
/// <param name="handles">The set of handles inheriting the state</param>
private void InheritHandles(TextureGroupHandle[] oldHandles, TextureGroupHandle[] handles)
{
foreach (var group in handles)
{
foreach (var handle in group.Handles)
{
bool dirty = false;
foreach (var oldGroup in oldHandles)
{
if (group.OverlapsWith(oldGroup.Offset, oldGroup.Size))
{
foreach (var oldHandle in oldGroup.Handles)
{
if (handle.OverlapsWith(oldHandle.Address, oldHandle.Size))
{
dirty |= oldHandle.Dirty;
}
}
group.Inherit(oldGroup);
}
}
if (dirty && !handle.Dirty)
{
handle.Reprotect(true);
}
if (group.Modified)
{
handle.RegisterAction((address, size) => FlushAction(group, address, size));
}
}
}
}
/// <summary>
/// Inherit state from another texture group.
/// </summary>
/// <param name="other">The texture group to inherit from</param>
public void Inherit(TextureGroup other)
{
bool layerViews = _hasLayerViews || other._hasLayerViews;
bool mipViews = _hasMipViews || other._hasMipViews;
if (layerViews != _hasLayerViews || mipViews != _hasMipViews)
{
_hasLayerViews = layerViews;
_hasMipViews = mipViews;
RecalculateHandleRegions();
}
InheritHandles(other._handles, _handles);
}
/// <summary>
/// Replace the current handles with the new handles. It is assumed that the new handles start dirty.
/// The dirty flags from the previous handles will be kept.
/// </summary>
/// <param name="handles">The handles to replace the current handles with</param>
private void ReplaceHandles(TextureGroupHandle[] handles)
{
if (_handles != null)
{
// When replacing handles, they should start as non-dirty.
foreach (TextureGroupHandle groupHandle in handles)
{
foreach (CpuRegionHandle handle in groupHandle.Handles)
{
handle.Reprotect();
}
}
InheritHandles(_handles, handles);
foreach (var oldGroup in _handles)
{
foreach (var oldHandle in oldGroup.Handles)
{
oldHandle.Dispose();
}
}
}
_handles = handles;
_loadNeeded = new bool[_handles.Length];
}
/// <summary>
/// Recalculate handle regions for this texture group, and inherit existing state into the new handles.
/// </summary>
private void RecalculateHandleRegions()
{
TextureGroupHandle[] handles;
if (!(_hasMipViews || _hasLayerViews))
{
// Single dirty region.
var cpuRegionHandles = new CpuRegionHandle[TextureRange.Count];
for (int i = 0; i < TextureRange.Count; i++)
{
var currentRange = TextureRange.GetSubRange(i);
cpuRegionHandles[i] = GenerateHandle(currentRange.Address, currentRange.Size);
}
var groupHandle = new TextureGroupHandle(this, 0, Storage.Size, _views, 0, 0, cpuRegionHandles);
foreach (CpuRegionHandle handle in cpuRegionHandles)
{
handle.RegisterDirtyEvent(() => DirtyAction(groupHandle));
}
handles = new TextureGroupHandle[] { groupHandle };
}
else
{
// Get views for the host texture.
// It's worth noting that either the texture has layer views or mip views when getting to this point, which simplifies the logic a little.
// Depending on if the texture is 3d, either the mip views imply that layer views are present (2d) or the other way around (3d).
// This is enforced by the way the texture matched as a view, so we don't need to check.
int layerHandles = _hasLayerViews ? _layers : 1;
int levelHandles = _hasMipViews ? _levels : 1;
int handleIndex = 0;
if (_is3D)
{
var handlesList = new List<TextureGroupHandle>();
for (int i = 0; i < levelHandles; i++)
{
for (int j = 0; j < layerHandles; j++)
{
(int viewStart, int views) = Get3DLevelRange(i);
viewStart += j;
views = _hasLayerViews ? 1 : views; // A layer view is also a mip view.
handlesList.Add(GenerateHandles(viewStart, views));
}
layerHandles = Math.Max(1, layerHandles >> 1);
}
handles = handlesList.ToArray();
}
else
{
handles = new TextureGroupHandle[layerHandles * levelHandles];
for (int i = 0; i < layerHandles; i++)
{
for (int j = 0; j < levelHandles; j++)
{
int viewStart = j + i * _levels;
int views = _hasMipViews ? 1 : _levels; // A mip view is also a layer view.
handles[handleIndex++] = GenerateHandles(viewStart, views);
}
}
}
}
ReplaceHandles(handles);
}
/// <summary>
/// Ensure that there is a handle for each potential texture view. Required for copy dependencies to work.
/// </summary>
private void EnsureFullSubdivision()
{
if (!(_hasLayerViews && _hasMipViews))
{
_hasLayerViews = true;
_hasMipViews = true;
RecalculateHandleRegions();
}
}
/// <summary>
/// Create a copy dependency between this texture group, and a texture at a given layer/level offset.
/// </summary>
/// <param name="other">The view compatible texture to create a dependency to</param>
/// <param name="firstLayer">The base layer of the given texture relative to the storage</param>
/// <param name="firstLevel">The base level of the given texture relative to the storage</param>
/// <param name="copyTo">True if this texture is first copied to the given one, false for the opposite direction</param>
public void CreateCopyDependency(Texture other, int firstLayer, int firstLevel, bool copyTo)
{
TextureGroup otherGroup = other.Group;
EnsureFullSubdivision();
otherGroup.EnsureFullSubdivision();
// Get the location of each texture within its storage, so we can find the handles to apply the dependency to.
// This can consist of multiple disjoint regions, for example if this is a mip slice of an array texture.
var targetRange = new List<(int BaseHandle, int RegionCount)>();
var otherRange = new List<(int BaseHandle, int RegionCount)>();
EvaluateRelevantHandles(firstLayer, firstLevel, other.Info.GetSlices(), other.Info.Levels, (baseHandle, regionCount, split) => targetRange.Add((baseHandle, regionCount)));
otherGroup.EvaluateRelevantHandles(other, (baseHandle, regionCount, split) => otherRange.Add((baseHandle, regionCount)));
int targetIndex = 0;
int otherIndex = 0;
(int Handle, int RegionCount) targetRegion = (0, 0);
(int Handle, int RegionCount) otherRegion = (0, 0);
while (true)
{
if (targetRegion.RegionCount == 0)
{
if (targetIndex >= targetRange.Count)
{
break;
}
targetRegion = targetRange[targetIndex++];
}
if (otherRegion.RegionCount == 0)
{
if (otherIndex >= otherRange.Count)
{
break;
}
otherRegion = otherRange[otherIndex++];
}
TextureGroupHandle handle = _handles[targetRegion.Handle++];
TextureGroupHandle otherHandle = other.Group._handles[otherRegion.Handle++];
targetRegion.RegionCount--;
otherRegion.RegionCount--;
handle.CreateCopyDependency(otherHandle, copyTo);
// If "copyTo" is true, this texture must copy to the other.
// Otherwise, it must copy to this texture.
if (copyTo)
{
otherHandle.Copy(handle);
}
else
{
handle.Copy(otherHandle);
}
}
}
/// <summary>
/// A flush has been requested on a tracked region. Find an appropriate view to flush.
/// </summary>
/// <param name="handle">The handle this flush action is for</param>
/// <param name="address">The address of the flushing memory access</param>
/// <param name="size">The size of the flushing memory access</param>
public void FlushAction(TextureGroupHandle handle, ulong address, ulong size)
{
Storage.ExternalFlush(address, size);
lock (handle.Overlaps)
{
foreach (Texture overlap in handle.Overlaps)
{
overlap.ExternalFlush(address, size);
}
}
handle.Modified = false;
}
/// <summary>
/// Dispose this texture group, disposing all related memory tracking handles.
/// </summary>
public void Dispose()
{
foreach (TextureGroupHandle group in _handles)
{
group.Dispose();
}
}
}
}