/// <summary>
/// Changes a texture's size to match the desired size for samplers,
/// or increases a texture's size to fit the region indicated by a size hint.
/// </summary>
/// <param name="info">The desired texture info</param>
/// <param name="texture">The texture to resize</param>
/// <param name="isSamplerTexture">True if the texture will be used for a sampler, false otherwise</param>
/// <param name="sizeHint">A hint indicating the minimum used size for the texture</param>
private void ChangeSizeIfNeeded(TextureInfo info, Texture texture, bool isSamplerTexture, Size?sizeHint)
{
if (isSamplerTexture)
{
// If this is used for sampling, the size must match,
// otherwise the shader would sample garbage data.
// To fix that, we create a new texture with the correct
// size, and copy the data from the old one to the new one.
if (!TextureCompatibility.SizeMatches(texture.Info, info))
{
texture.ChangeSize(info.Width, info.Height, info.DepthOrLayers);
}
}
else if (sizeHint != null)
{
// A size hint indicates that data will be used within that range, at least.
// If the texture is smaller than the size hint, it must be enlarged to meet it.
// The maximum size is provided by the requested info, which generally has an aligned size.
int width = Math.Max(texture.Info.Width, Math.Min(sizeHint.Value.Width, info.Width));
int height = Math.Max(texture.Info.Height, Math.Min(sizeHint.Value.Height, info.Height));
if (texture.Info.Width != width || texture.Info.Height != height)
{
texture.ChangeSize(width, height, info.DepthOrLayers);
}
}
}
/// <summary>
/// Tries to find an existing texture, or create a new one if not found.
/// </summary>
/// <param name="info">Texture information of the texture to be found or created</param>
/// <param name="flags">The texture search flags, defines texture comparison rules</param>
/// <returns>The texture</returns>
public Texture FindOrCreateTexture(TextureInfo info, TextureSearchFlags flags = TextureSearchFlags.None)
{
bool isSamplerTexture = (flags & TextureSearchFlags.Sampler) != 0;
// Try to find a perfect texture match, with the same address and parameters.
int sameAddressOverlapsCount = _textures.FindOverlaps(info.Address, ref _textureOverlaps);
for (int index = 0; index < sameAddressOverlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
if (overlap.IsPerfectMatch(info, flags))
{
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(overlap);
}
else if (!overlap.SizeMatches(info))
{
// If this is used for sampling, the size must match,
// otherwise the shader would sample garbage data.
// To fix that, we create a new texture with the correct
// size, and copy the data from the old one to the new one.
overlap.ChangeSize(info.Width, info.Height, info.DepthOrLayers);
}
return(overlap);
}
}
// Calculate texture sizes, used to find all overlapping textures.
SizeInfo sizeInfo;
if (info.IsLinear)
{
sizeInfo = SizeCalculator.GetLinearTextureSize(
info.Stride,
info.Height,
info.FormatInfo.BlockHeight);
}
else
{
sizeInfo = SizeCalculator.GetBlockLinearTextureSize(
info.Width,
info.Height,
info.GetDepth(),
info.Levels,
info.GetLayers(),
info.FormatInfo.BlockWidth,
info.FormatInfo.BlockHeight,
info.FormatInfo.BytesPerPixel,
info.GobBlocksInY,
info.GobBlocksInZ,
info.GobBlocksInTileX);
}
// Find view compatible matches.
ulong size = (ulong)sizeInfo.TotalSize;
int overlapsCount = _textures.FindOverlaps(info.Address, size, ref _textureOverlaps);
Texture texture = null;
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
if (overlap.IsViewCompatible(info, size, out int firstLayer, out int firstLevel))
{
if (!isSamplerTexture)
{
info = AdjustSizes(overlap, info, firstLevel);
}
texture = overlap.CreateView(info, sizeInfo, firstLayer, firstLevel);
if (IsTextureModified(overlap))
{
CacheTextureModified(texture);
}
// The size only matters (and is only really reliable) when the
// texture is used on a sampler, because otherwise the size will be
// aligned.
if (!overlap.SizeMatches(info, firstLevel) && isSamplerTexture)
{
texture.ChangeSize(info.Width, info.Height, info.DepthOrLayers);
}
break;
}
}
// No match, create a new texture.
if (texture == null)
{
texture = new Texture(_context, info, sizeInfo);
// 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.SynchronizeMemory();
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
if (texture.IsViewCompatible(overlap.Info, overlap.Size, out int firstLayer, out int firstLevel))
{
TextureInfo overlapInfo = AdjustSizes(texture, overlap.Info, firstLevel);
TextureCreateInfo createInfo = GetCreateInfo(overlapInfo, _context.Capabilities);
ITexture newView = texture.HostTexture.CreateView(createInfo, firstLayer, firstLevel);
overlap.HostTexture.CopyTo(newView, 0, 0);
// Inherit modification from overlapping texture, do that before replacing
// the view since the replacement operation removes it from the list.
if (IsTextureModified(overlap))
{
CacheTextureModified(texture);
}
overlap.ReplaceView(texture, overlapInfo, newView);
}
}
// If the texture is a 3D texture, we need to additionally copy any slice
// of the 3D texture to the newly created 3D texture.
if (info.Target == Target.Texture3D)
{
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
if (texture.IsViewCompatible(
overlap.Info,
overlap.Size,
isCopy: true,
out int firstLayer,
out int firstLevel))
{
overlap.HostTexture.CopyTo(texture.HostTexture, firstLayer, firstLevel);
if (IsTextureModified(overlap))
{
CacheTextureModified(texture);
}
}
}
}
}
// Sampler textures are managed by the texture pool, all other textures
// are managed by the auto delete cache.
if (!isSamplerTexture)
{
_cache.Add(texture);
texture.Modified += CacheTextureModified;
texture.Disposed += CacheTextureDisposed;
}
_textures.Add(texture);
ShrinkOverlapsBufferIfNeeded();
return(texture);
}
/// <summary>
/// Tries to find an existing texture, or create a new one if not found.
/// </summary>
/// <param name="info">Texture information of the texture to be found or created</param>
/// <param name="flags">The texture search flags, defines texture comparison rules</param>
/// <returns>The texture</returns>
public Texture FindOrCreateTexture(TextureInfo info, TextureSearchFlags flags = TextureSearchFlags.None)
{
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;
}
int sameAddressOverlapsCount;
lock (_textures)
{
// Try to find a perfect texture match, with the same address and parameters.
sameAddressOverlapsCount = _textures.FindOverlaps(info.Address, ref _textureOverlaps);
}
for (int index = 0; index < sameAddressOverlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
if (overlap.IsPerfectMatch(info, flags))
{
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(overlap);
}
else if (!TextureCompatibility.SizeMatches(overlap.Info, info))
{
// If this is used for sampling, the size must match,
// otherwise the shader would sample garbage data.
// To fix that, we create a new texture with the correct
// size, and copy the data from the old one to the new one.
overlap.ChangeSize(info.Width, info.Height, info.DepthOrLayers);
}
overlap.SynchronizeMemory();
return(overlap);
}
}
// Calculate texture sizes, used to find all overlapping textures.
SizeInfo sizeInfo;
if (info.Target == Target.TextureBuffer)
{
sizeInfo = new SizeInfo(info.Width * info.FormatInfo.BytesPerPixel);
}
else if (info.IsLinear)
{
sizeInfo = SizeCalculator.GetLinearTextureSize(
info.Stride,
info.Height,
info.FormatInfo.BlockHeight);
}
else
{
sizeInfo = SizeCalculator.GetBlockLinearTextureSize(
info.Width,
info.Height,
info.GetDepth(),
info.Levels,
info.GetLayers(),
info.FormatInfo.BlockWidth,
info.FormatInfo.BlockHeight,
info.FormatInfo.BytesPerPixel,
info.GobBlocksInY,
info.GobBlocksInZ,
info.GobBlocksInTileX);
}
// Find view compatible matches.
ulong size = (ulong)sizeInfo.TotalSize;
int overlapsCount;
lock (_textures)
{
overlapsCount = _textures.FindOverlaps(info.Address, size, ref _textureOverlaps);
}
Texture texture = null;
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
if (overlap.IsViewCompatible(info, size, out int firstLayer, out int firstLevel) == TextureViewCompatibility.Full)
{
if (!isSamplerTexture)
{
info = AdjustSizes(overlap, info, firstLevel);
}
texture = overlap.CreateView(info, sizeInfo, firstLayer, firstLevel);
if (IsTextureModified(overlap))
{
texture.SignalModified();
}
// The size only matters (and is only really reliable) when the
// texture is used on a sampler, because otherwise the size will be
// aligned.
if (!TextureCompatibility.SizeMatches(overlap.Info, info, firstLevel) && isSamplerTexture)
{
texture.ChangeSize(info.Width, info.Height, info.DepthOrLayers);
}
break;
}
}
// No match, create a new texture.
if (texture == null)
{
texture = new Texture(_context, info, sizeInfo, 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;
bool setData = isSamplerTexture || overlapsCount == 0;
for (int index = 0; index < overlapsCount; index++)
{
Texture overlap = _textureOverlaps[index];
bool overlapInCache = overlap.CacheNode != null;
TextureViewCompatibility compatibility = texture.IsViewCompatible(overlap.Info, overlap.Size, out int firstLayer, out int firstLevel);
if (compatibility != TextureViewCompatibility.Incompatible)
{
if (_overlapInfo.Length != _textureOverlaps.Length)
{
Array.Resize(ref _overlapInfo, _textureOverlaps.Length);
}
_overlapInfo[viewCompatible] = new OverlapInfo(compatibility, firstLayer, firstLevel);
_textureOverlaps[viewCompatible++] = overlap;
}
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 && (overlap.Address <texture.Address || overlap.EndAddress> texture.EndAddress) && overlap.HasViewCompatibleChild(texture);
setData |= modified || flush;
if (overlapInCache)
{
_cache.Remove(overlap, flush);
}
}
}
// 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 (oInfo.Compatibility != TextureViewCompatibility.Full)
{
continue; // Copy only compatibilty.
}
TextureInfo overlapInfo = AdjustSizes(texture, overlap.Info, oInfo.FirstLevel);
TextureCreateInfo createInfo = GetCreateInfo(overlapInfo, _context.Capabilities);
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);
}
ITexture newView = texture.HostTexture.CreateView(createInfo, oInfo.FirstLayer, oInfo.FirstLevel);
overlap.HostTexture.CopyTo(newView, 0, 0);
// Inherit modification from overlapping texture, do that before replacing
// the view since the replacement operation removes it from the list.
if (IsTextureModified(overlap))
{
texture.SignalModified();
}
overlap.ReplaceView(texture, overlapInfo, newView, oInfo.FirstLayer, oInfo.FirstLevel);
}
// If the texture is a 3D texture, we need to additionally copy any slice
// of the 3D texture to the newly created 3D texture.
if (info.Target == Target.Texture3D)
{
for (int index = 0; index < viewCompatible; index++)
{
Texture overlap = _textureOverlaps[index];
OverlapInfo oInfo = _overlapInfo[index];
if (oInfo.Compatibility != TextureViewCompatibility.Incompatible)
{
overlap.BlacklistScale();
overlap.HostTexture.CopyTo(texture.HostTexture, oInfo.FirstLayer, oInfo.FirstLevel);
if (IsTextureModified(overlap))
{
texture.SignalModified();
}
}
}
}
}
// Sampler textures are managed by the texture pool, all other textures
// are managed by the auto delete cache.
if (!isSamplerTexture)
{
_cache.Add(texture);
texture.Modified += CacheTextureModified;
texture.Disposed += CacheTextureDisposed;
}
lock (_textures)
{
_textures.Add(texture);
}
ShrinkOverlapsBufferIfNeeded();
return(texture);
}