private HostShaderCacheEntry()
{
Header = new HostShaderCacheEntryHeader();
CBuffers = new BufferDescriptor[0];
SBuffers = new BufferDescriptor[0];
Textures = new TextureDescriptor[0];
Images = new TextureDescriptor[0];
}
private HostShaderCacheEntry(ShaderProgramInfo programInfo)
{
Header = new HostShaderCacheEntryHeader(programInfo.CBuffers.Count,
programInfo.SBuffers.Count,
programInfo.Textures.Count,
programInfo.Images.Count,
programInfo.UsesInstanceId);
CBuffers = programInfo.CBuffers.ToArray();
SBuffers = programInfo.SBuffers.ToArray();
Textures = programInfo.Textures.ToArray();
Images = programInfo.Images.ToArray();
}
/// <summary>
/// Create a new instance of <see cref="HostShaderCacheEntry"/>.
/// </summary>
/// <param name="header">The header of the cached shader entry</param>
/// <param name="cBuffers">Cached constant buffers</param>
/// <param name="sBuffers">Cached storage buffers</param>
/// <param name="textures">Cached texture descriptors</param>
/// <param name="images">Cached image descriptors</param>
private HostShaderCacheEntry(
HostShaderCacheEntryHeader header,
BufferDescriptor[] cBuffers,
BufferDescriptor[] sBuffers,
TextureDescriptor[] textures,
TextureDescriptor[] images)
{
Header = header;
CBuffers = cBuffers;
SBuffers = sBuffers;
Textures = textures;
Images = images;
}
private HostShaderCacheEntry(ShaderProgramInfo programInfo)
{
Header = new HostShaderCacheEntryHeader(programInfo.CBuffers.Count,
programInfo.SBuffers.Count,
programInfo.Textures.Count,
programInfo.Images.Count,
programInfo.UsesInstanceId,
programInfo.UsesRtLayer,
programInfo.ClipDistancesWritten,
programInfo.FragmentOutputMap);
CBuffers = programInfo.CBuffers.ToArray();
SBuffers = programInfo.SBuffers.ToArray();
Textures = programInfo.Textures.ToArray();
Images = programInfo.Images.ToArray();
}
/// <summary>
/// Parse a raw cached user shader program into an array of shader cache entry.
/// </summary>
/// <param name="data">The raw cached host shader</param>
/// <param name="programCode">The host shader program</param>
/// <returns>An array of shader cache entry</returns>
internal static HostShaderCacheEntry[] Parse(ReadOnlySpan <byte> data, out ReadOnlySpan <byte> programCode)
{
HostShaderCacheHeader fileHeader = MemoryMarshal.Read <HostShaderCacheHeader>(data);
data = data.Slice(Unsafe.SizeOf <HostShaderCacheHeader>());
ReadOnlySpan <HostShaderCacheEntryHeader> entryHeaders = MemoryMarshal.Cast <byte, HostShaderCacheEntryHeader>(data.Slice(0, fileHeader.Count * Unsafe.SizeOf <HostShaderCacheEntryHeader>()));
data = data.Slice(fileHeader.Count * Unsafe.SizeOf <HostShaderCacheEntryHeader>());
HostShaderCacheEntry[] result = new HostShaderCacheEntry[fileHeader.Count];
for (int i = 0; i < result.Length; i++)
{
HostShaderCacheEntryHeader header = entryHeaders[i];
if (!header.InUse)
{
continue;
}
int cBufferDescriptorsSize = header.CBuffersCount * Unsafe.SizeOf <BufferDescriptor>();
int sBufferDescriptorsSize = header.SBuffersCount * Unsafe.SizeOf <BufferDescriptor>();
int textureDescriptorsSize = header.TexturesCount * Unsafe.SizeOf <TextureDescriptor>();
int imageDescriptorsSize = header.ImagesCount * Unsafe.SizeOf <TextureDescriptor>();
ReadOnlySpan <BufferDescriptor> cBuffers = MemoryMarshal.Cast <byte, BufferDescriptor>(data.Slice(0, cBufferDescriptorsSize));
data = data.Slice(cBufferDescriptorsSize);
ReadOnlySpan <BufferDescriptor> sBuffers = MemoryMarshal.Cast <byte, BufferDescriptor>(data.Slice(0, sBufferDescriptorsSize));
data = data.Slice(sBufferDescriptorsSize);
ReadOnlySpan <TextureDescriptor> textureDescriptors = MemoryMarshal.Cast <byte, TextureDescriptor>(data.Slice(0, textureDescriptorsSize));
data = data.Slice(textureDescriptorsSize);
ReadOnlySpan <TextureDescriptor> imageDescriptors = MemoryMarshal.Cast <byte, TextureDescriptor>(data.Slice(0, imageDescriptorsSize));
data = data.Slice(imageDescriptorsSize);
result[i] = new HostShaderCacheEntry(header, cBuffers.ToArray(), sBuffers.ToArray(), textureDescriptors.ToArray(), imageDescriptors.ToArray());
}
programCode = data.Slice(0, fileHeader.CodeSize);
return(result);
}
