/// <summary>
/// Ensures that the image bindings are visible to the host GPU.
/// Note: this actually performs the binding using the host graphics API.
/// </summary>
/// <param name="pool">The current texture pool</param>
/// <param name="stage">The shader stage using the textures to be bound</param>
/// <param name="stageIndex">The stage number of the specified shader stage</param>
private void CommitImageBindings(TexturePool pool, ShaderStage stage, int stageIndex)
{
if (_imageBindings[stageIndex] == null)
{
return;
}
// Scales for images appear after the texture ones.
int baseScaleIndex = _textureBindings[stageIndex]?.Length ?? 0;
for (int index = 0; index < _imageBindings[stageIndex].Length; index++)
{
TextureBindingInfo bindingInfo = _imageBindings[stageIndex][index];
int textureBufferIndex = bindingInfo.CbufSlot < 0 ? _textureBufferIndex : bindingInfo.CbufSlot;
int packedId = ReadPackedId(stageIndex, bindingInfo.Handle, textureBufferIndex);
int textureId = UnpackTextureId(packedId);
Texture texture = pool.Get(textureId);
ITexture hostTexture = texture?.GetTargetTexture(bindingInfo.Target);
bool isStore = bindingInfo.Flags.HasFlag(TextureUsageFlags.ImageStore);
if (hostTexture != null && texture.Target == Target.TextureBuffer)
{
// Ensure that the buffer texture is using the correct buffer as storage.
// Buffers are frequently re-created to accomodate larger data, so we need to re-bind
// to ensure we're not using a old buffer that was already deleted.
Format format = bindingInfo.Format;
if (format == 0 && texture != null)
{
format = texture.Format;
}
_context.Methods.BufferManager.SetBufferTextureStorage(hostTexture, texture.Range.GetSubRange(0).Address, texture.Size, bindingInfo, format, true);
}
else if (isStore)
{
texture?.SignalModified();
}
if (_imageState[stageIndex][index].Texture != hostTexture || _rebind)
{
if (UpdateScale(texture, bindingInfo, baseScaleIndex + index, stage))
{
hostTexture = texture?.GetTargetTexture(bindingInfo.Target);
}
_imageState[stageIndex][index].Texture = hostTexture;
Format format = bindingInfo.Format;
if (format == 0 && texture != null)
{
format = texture.Format;
}
_context.Renderer.Pipeline.SetImage(bindingInfo.Binding, hostTexture, format);
}
}
}
/// <summary>
/// Ensures that the texture bindings are visible to the host GPU.
/// Note: this actually performs the binding using the host graphics API.
/// </summary>
/// <param name="pool">The current texture pool</param>
/// <param name="stage">The shader stage using the textures to be bound</param>
/// <param name="stageIndex">The stage number of the specified shader stage</param>
private void CommitTextureBindings(TexturePool pool, ShaderStage stage, int stageIndex)
{
if (_textureBindings[stageIndex] == null)
{
return;
}
for (int index = 0; index < _textureBindings[stageIndex].Length; index++)
{
TextureBindingInfo bindingInfo = _textureBindings[stageIndex][index];
int textureBufferIndex = bindingInfo.CbufSlot < 0 ? _textureBufferIndex : bindingInfo.CbufSlot;
int packedId = ReadPackedId(stageIndex, bindingInfo.Handle, textureBufferIndex);
int textureId = UnpackTextureId(packedId);
int samplerId;
if (_samplerIndex == SamplerIndex.ViaHeaderIndex)
{
samplerId = textureId;
}
else
{
samplerId = UnpackSamplerId(packedId);
}
Texture texture = pool.Get(textureId);
ITexture hostTexture = texture?.GetTargetTexture(bindingInfo.Target);
if (_textureState[stageIndex][index].Texture != hostTexture || _rebind)
{
if (UpdateScale(texture, bindingInfo, index, stage))
{
hostTexture = texture?.GetTargetTexture(bindingInfo.Target);
}
_textureState[stageIndex][index].Texture = hostTexture;
_context.Renderer.Pipeline.SetTexture(bindingInfo.Binding, hostTexture);
}
if (hostTexture != null && texture.Target == Target.TextureBuffer)
{
// Ensure that the buffer texture is using the correct buffer as storage.
// Buffers are frequently re-created to accomodate larger data, so we need to re-bind
// to ensure we're not using a old buffer that was already deleted.
_context.Methods.BufferManager.SetBufferTextureStorage(hostTexture, texture.Range.GetSubRange(0).Address, texture.Size, bindingInfo, bindingInfo.Format, false);
}
Sampler sampler = _samplerPool.Get(samplerId);
ISampler hostSampler = sampler?.HostSampler;
if (_textureState[stageIndex][index].Sampler != hostSampler || _rebind)
{
_textureState[stageIndex][index].Sampler = hostSampler;
_context.Renderer.Pipeline.SetSampler(bindingInfo.Binding, hostSampler);
}
}
}
/// <summary>
/// Tries to find an existing texture, or create a new one if not found.
/// </summary>
/// <param name="memoryManager">GPU memory manager where the texture is mapped</param>
/// <param name="flags">The texture search flags, defines texture comparison rules</param>
/// <param name="info">Texture information of the texture to be found or created</param>
/// <param name="layerSize">Size in bytes of a single texture layer</param>
/// <param name="sizeHint">A hint indicating the minimum used size for the texture</param>
/// <param name="range">Optional ranges of physical memory where the texture data is located</param>
/// <returns>The texture</returns>
public Texture FindOrCreateTexture(
MemoryManager memoryManager,
TextureSearchFlags flags,
TextureInfo info,
int layerSize = 0,
Size?sizeHint = null,
MultiRange?range = null)
{
bool isSamplerTexture = (flags & TextureSearchFlags.ForSampler) != 0;
bool isScalable = IsUpscaleCompatible(info);
TextureScaleMode scaleMode = TextureScaleMode.Blacklisted;
if (isScalable)
{
scaleMode = (flags & TextureSearchFlags.WithUpscale) != 0 ? TextureScaleMode.Scaled : TextureScaleMode.Eligible;
}
ulong address;
if (range != null)
{
address = range.Value.GetSubRange(0).Address;
}
else
{
address = memoryManager.Translate(info.GpuAddress);
if (address == MemoryManager.PteUnmapped)
{
return(null);
}
}
int sameAddressOverlapsCount;
lock (_textures)
{
// Try to find a perfect texture match, with the same address and parameters.
sameAddressOverlapsCount = _textures.FindOverlaps(address, ref _textureOverlaps);
}
Texture texture = null;
TextureMatchQuality bestQuality = TextureMatchQuality.NoMatch;
for (int index = 0; index < sameAddressOverlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
TextureMatchQuality matchQuality = overlap.IsExactMatch(info, flags);
if (matchQuality != TextureMatchQuality.NoMatch)
{
// If the parameters match, we need to make sure the texture is mapped to the same memory regions.
if (range != null)
{
// If a range of memory was supplied, just check if the ranges match.
if (!overlap.Range.Equals(range.Value))
{
continue;
}
}
else
{
// If no range was supplied, we can check if the GPU virtual address match. If they do,
// we know the textures are located at the same memory region.
// If they don't, it may still be mapped to the same physical region, so we
// do a more expensive check to tell if they are mapped into the same physical regions.
// If the GPU VA for the texture has ever been unmapped, then the range must be checked regardless.
if ((overlap.Info.GpuAddress != info.GpuAddress || overlap.ChangedMapping) &&
!memoryManager.CompareRange(overlap.Range, info.GpuAddress))
{
continue;
}
}
}
if (matchQuality == TextureMatchQuality.Perfect)
{
texture = overlap;
break;
}
else if (matchQuality > bestQuality)
{
texture = overlap;
bestQuality = matchQuality;
}
}
if (texture != null)
{
if (!isSamplerTexture)
{
// If not a sampler texture, it is managed by the auto delete
// cache, ensure that it is on the "top" of the list to avoid
// deletion.
_cache.Lift(texture);
}
ChangeSizeIfNeeded(info, texture, isSamplerTexture, sizeHint);
texture.SynchronizeMemory();
return(texture);
}
// Calculate texture sizes, used to find all overlapping textures.
SizeInfo sizeInfo = info.CalculateSizeInfo(layerSize);
ulong size = (ulong)sizeInfo.TotalSize;
if (range == null)
{
range = memoryManager.GetPhysicalRegions(info.GpuAddress, size);
}
// Find view compatible matches.
int overlapsCount;
lock (_textures)
{
overlapsCount = _textures.FindOverlaps(range.Value, ref _textureOverlaps);
}
if (_overlapInfo.Length != _textureOverlaps.Length)
{
Array.Resize(ref _overlapInfo, _textureOverlaps.Length);
}
// =============== Find Texture View of Existing Texture ===============
int fullyCompatible = 0;
// Evaluate compatibility of overlaps
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
TextureViewCompatibility overlapCompatibility = overlap.IsViewCompatible(info, range.Value, sizeInfo.LayerSize, out int firstLayer, out int firstLevel);
if (overlapCompatibility == TextureViewCompatibility.Full)
{
if (overlap.IsView)
{
overlapCompatibility = TextureViewCompatibility.CopyOnly;
}
else
{
fullyCompatible++;
}
}
_overlapInfo[index] = new OverlapInfo(overlapCompatibility, firstLayer, firstLevel);
}
// Search through the overlaps to find a compatible view and establish any copy dependencies.
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
OverlapInfo oInfo = _overlapInfo[index];
if (oInfo.Compatibility == TextureViewCompatibility.Full)
{
TextureInfo adjInfo = AdjustSizes(overlap, info, oInfo.FirstLevel);
if (!isSamplerTexture)
{
info = adjInfo;
}
texture = overlap.CreateView(adjInfo, sizeInfo, range.Value, oInfo.FirstLayer, oInfo.FirstLevel);
ChangeSizeIfNeeded(info, texture, isSamplerTexture, sizeHint);
texture.SynchronizeMemory();
break;
}
else if (oInfo.Compatibility == TextureViewCompatibility.CopyOnly && fullyCompatible == 0)
{
// Only copy compatible. If there's another choice for a FULLY compatible texture, choose that instead.
texture = new Texture(_context, _physicalMemory, info, sizeInfo, range.Value, scaleMode);
texture.InitializeGroup(true, true);
texture.InitializeData(false, false);
overlap.SynchronizeMemory();
overlap.CreateCopyDependency(texture, oInfo.FirstLayer, oInfo.FirstLevel, true);
break;
}
}
if (texture != null)
{
// This texture could be a view of multiple parent textures with different storages, even if it is a view.
// When a texture is created, make sure all possible dependencies to other textures are created as copies.
// (even if it could be fulfilled without a copy)
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
OverlapInfo oInfo = _overlapInfo[index];
if (oInfo.Compatibility != TextureViewCompatibility.Incompatible && overlap.Group != texture.Group)
{
overlap.SynchronizeMemory();
overlap.CreateCopyDependency(texture, oInfo.FirstLayer, oInfo.FirstLevel, true);
}
}
texture.SynchronizeMemory();
}
// =============== Create a New Texture ===============
// No match, create a new texture.
if (texture == null)
{
texture = new Texture(_context, _physicalMemory, info, sizeInfo, range.Value, scaleMode);
// Step 1: Find textures that are view compatible with the new texture.
// Any textures that are incompatible will contain garbage data, so they should be removed where possible.
int viewCompatible = 0;
fullyCompatible = 0;
bool setData = isSamplerTexture || overlapsCount == 0 || flags.HasFlag(TextureSearchFlags.ForCopy);
bool hasLayerViews = false;
bool hasMipViews = false;
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
bool overlapInCache = overlap.CacheNode != null;
TextureViewCompatibility compatibility = texture.IsViewCompatible(overlap.Info, overlap.Range, overlap.LayerSize, out int firstLayer, out int firstLevel);
if (overlap.IsView && compatibility == TextureViewCompatibility.Full)
{
compatibility = TextureViewCompatibility.CopyOnly;
}
if (compatibility != TextureViewCompatibility.Incompatible)
{
if (compatibility == TextureViewCompatibility.Full)
{
if (viewCompatible == fullyCompatible)
{
_overlapInfo[viewCompatible] = new OverlapInfo(compatibility, firstLayer, firstLevel);
_textureOverlaps[viewCompatible++] = overlap;
}
else
{
// Swap overlaps so that the fully compatible views have priority.
_overlapInfo[viewCompatible] = _overlapInfo[fullyCompatible];
_textureOverlaps[viewCompatible++] = _textureOverlaps[fullyCompatible];
_overlapInfo[fullyCompatible] = new OverlapInfo(compatibility, firstLayer, firstLevel);
_textureOverlaps[fullyCompatible] = overlap;
}
fullyCompatible++;
}
else
{
_overlapInfo[viewCompatible] = new OverlapInfo(compatibility, firstLayer, firstLevel);
_textureOverlaps[viewCompatible++] = overlap;
}
hasLayerViews |= overlap.Info.GetSlices() < texture.Info.GetSlices();
hasMipViews |= overlap.Info.Levels < texture.Info.Levels;
}
else if (overlapInCache || !setData)
{
if (info.GobBlocksInZ > 1 && info.GobBlocksInZ == overlap.Info.GobBlocksInZ)
{
// Allow overlapping slices of 3D textures. Could be improved in future by making sure the textures don't overlap.
continue;
}
// The overlap texture is going to contain garbage data after we draw, or is generally incompatible.
// If the texture cannot be entirely contained in the new address space, and one of its view children is compatible with us,
// it must be flushed before removal, so that the data is not lost.
// If the texture was modified since its last use, then that data is probably meant to go into this texture.
// If the data has been modified by the CPU, then it also shouldn't be flushed.
bool modified = overlap.ConsumeModified();
bool flush = overlapInCache && !modified && !texture.Range.Contains(overlap.Range) && overlap.HasViewCompatibleChild(texture);
setData |= modified || flush;
if (overlapInCache)
{
_cache.Remove(overlap, flush);
}
}
}
texture.InitializeGroup(hasLayerViews, hasMipViews);
// We need to synchronize before copying the old view data to the texture,
// otherwise the copied data would be overwritten by a future synchronization.
texture.InitializeData(false, setData);
for (int index = 0; index < viewCompatible; index++)
{
Texture overlap = _textureOverlaps[index];
OverlapInfo oInfo = _overlapInfo[index];
if (overlap.Group == texture.Group)
{
// If the texture group is equal, then this texture (or its parent) is already a view.
continue;
}
TextureInfo overlapInfo = AdjustSizes(texture, overlap.Info, oInfo.FirstLevel);
if (texture.ScaleFactor != overlap.ScaleFactor)
{
// A bit tricky, our new texture may need to contain an existing texture that is upscaled, but isn't itself.
// In that case, we prefer the higher scale only if our format is render-target-like, otherwise we scale the view down before copy.
texture.PropagateScale(overlap);
}
if (oInfo.Compatibility != TextureViewCompatibility.Full)
{
// Copy only compatibility, or target texture is already a view.
overlap.SynchronizeMemory();
texture.CreateCopyDependency(overlap, oInfo.FirstLayer, oInfo.FirstLevel, false);
}
else
{
TextureCreateInfo createInfo = GetCreateInfo(overlapInfo, _context.Capabilities, overlap.ScaleFactor);
ITexture newView = texture.HostTexture.CreateView(createInfo, oInfo.FirstLayer, oInfo.FirstLevel);
overlap.SynchronizeMemory();
overlap.HostTexture.CopyTo(newView, 0, 0);
overlap.ReplaceView(texture, overlapInfo, newView, oInfo.FirstLayer, oInfo.FirstLevel);
}
}
texture.SynchronizeMemory();
}
// Sampler textures are managed by the texture pool, all other textures
// are managed by the auto delete cache.
if (!isSamplerTexture)
{
_cache.Add(texture);
}
lock (_textures)
{
_textures.Add(texture);
}
ShrinkOverlapsBufferIfNeeded();
return(texture);
}
/// <summary>
/// Adjusts the size of the texture information for a given mipmap level,
/// based on the size of a parent texture.
/// </summary>
/// <param name="parent">The parent texture</param>
/// <param name="info">The texture information to be adjusted</param>
/// <param name="firstLevel">The first level of the texture view</param>
/// <returns>The adjusted texture information with the new size</returns>
private static TextureInfo AdjustSizes(Texture parent, TextureInfo info, int firstLevel)
{
// When the texture is used as view of another texture, we must
// ensure that the sizes are valid, otherwise data uploads would fail
// (and the size wouldn't match the real size used on the host API).
// Given a parent texture from where the view is created, we have the
// following rules:
// - The view size must be equal to the parent size, divided by (2 ^ l),
// where l is the first mipmap level of the view. The division result must
// be rounded down, and the result must be clamped to 1.
// - If the parent format is compressed, and the view format isn't, the
// view size is calculated as above, but the width and height of the
// view must be also divided by the compressed format block width and height.
// - If the parent format is not compressed, and the view is, the view
// size is calculated as described on the first point, but the width and height
// of the view must be also multiplied by the block width and height.
int width = Math.Max(1, parent.Info.Width >> firstLevel);
int height = Math.Max(1, parent.Info.Height >> firstLevel);
if (parent.Info.FormatInfo.IsCompressed && !info.FormatInfo.IsCompressed)
{
width = BitUtils.DivRoundUp(width, parent.Info.FormatInfo.BlockWidth);
height = BitUtils.DivRoundUp(height, parent.Info.FormatInfo.BlockHeight);
}
else if (!parent.Info.FormatInfo.IsCompressed && info.FormatInfo.IsCompressed)
{
width *= info.FormatInfo.BlockWidth;
height *= info.FormatInfo.BlockHeight;
}
int depthOrLayers;
if (info.Target == Target.Texture3D)
{
depthOrLayers = Math.Max(1, parent.Info.DepthOrLayers >> firstLevel);
}
else
{
depthOrLayers = info.DepthOrLayers;
}
return(new TextureInfo(
info.GpuAddress,
width,
height,
depthOrLayers,
info.Levels,
info.SamplesInX,
info.SamplesInY,
info.Stride,
info.IsLinear,
info.GobBlocksInY,
info.GobBlocksInZ,
info.GobBlocksInTileX,
info.Target,
info.FormatInfo,
info.DepthStencilMode,
info.SwizzleR,
info.SwizzleG,
info.SwizzleB,
info.SwizzleA));
}
/// <summary>
/// Tries to find an existing texture, or create a new one if not found.
/// </summary>
/// <param name="memoryManager">GPU memory manager where the texture is mapped</param>
/// <param name="colorState">Color buffer texture to find or create</param>
/// <param name="samplesInX">Number of samples in the X direction, for MSAA</param>
/// <param name="samplesInY">Number of samples in the Y direction, for MSAA</param>
/// <param name="sizeHint">A hint indicating the minimum used size for the texture</param>
/// <returns>The texture</returns>
public Texture FindOrCreateTexture(MemoryManager memoryManager, RtColorState colorState, int samplesInX, int samplesInY, Size sizeHint)
{
bool isLinear = colorState.MemoryLayout.UnpackIsLinear();
int gobBlocksInY = colorState.MemoryLayout.UnpackGobBlocksInY();
int gobBlocksInZ = colorState.MemoryLayout.UnpackGobBlocksInZ();
Target target;
if (colorState.MemoryLayout.UnpackIsTarget3D())
{
target = Target.Texture3D;
}
else if ((samplesInX | samplesInY) != 1)
{
target = colorState.Depth > 1
? Target.Texture2DMultisampleArray
: Target.Texture2DMultisample;
}
else
{
target = colorState.Depth > 1
? Target.Texture2DArray
: Target.Texture2D;
}
FormatInfo formatInfo = colorState.Format.Convert();
int width, stride;
// For linear textures, the width value is actually the stride.
// We can easily get the width by dividing the stride by the bpp,
// since the stride is the total number of bytes occupied by a
// line. The stride should also meet alignment constraints however,
// so the width we get here is the aligned width.
if (isLinear)
{
width = colorState.WidthOrStride / formatInfo.BytesPerPixel;
stride = colorState.WidthOrStride;
}
else
{
width = colorState.WidthOrStride;
stride = 0;
}
TextureInfo info = new TextureInfo(
colorState.Address.Pack(),
width,
colorState.Height,
colorState.Depth,
1,
samplesInX,
samplesInY,
stride,
isLinear,
gobBlocksInY,
gobBlocksInZ,
1,
target,
formatInfo);
int layerSize = !isLinear ? colorState.LayerSize * 4 : 0;
Texture texture = FindOrCreateTexture(memoryManager, TextureSearchFlags.WithUpscale, info, layerSize, sizeHint);
texture?.SynchronizeMemory();
return(texture);
}