/// <summary>
/// Writes the host binary code on the host cache.
/// </summary>
/// <param name="context">GPU context</param>
/// <param name="hostCode">Host binary code</param>
/// <param name="shaders">Shader stages to be added to the host cache</param>
/// <param name="streams">Output streams to use</param>
/// <param name="timestamp">File creation timestamp</param>
private void WriteHostCode(
GpuContext context,
ReadOnlySpan <byte> hostCode,
CachedShaderStage[] shaders,
DiskCacheOutputStreams streams,
ulong timestamp)
{
var tocFileStream = streams != null ? streams.HostTocFileStream : DiskCacheCommon.OpenFile(_basePath, GetHostTocFileName(context), writable: true);
var dataFileStream = streams != null ? streams.HostDataFileStream : DiskCacheCommon.OpenFile(_basePath, GetHostDataFileName(context), writable: true);
if (tocFileStream.Length == 0)
{
TocHeader header = new TocHeader();
CreateToc(tocFileStream, ref header, TochMagic, 0, timestamp);
}
tocFileStream.Seek(0, SeekOrigin.End);
dataFileStream.Seek(0, SeekOrigin.End);
BinarySerializer tocWriter = new BinarySerializer(tocFileStream);
BinarySerializer dataWriter = new BinarySerializer(dataFileStream);
OffsetAndSize offsetAndSize = new OffsetAndSize();
offsetAndSize.Offset = (ulong)dataFileStream.Position;
offsetAndSize.UncompressedSize = (uint)hostCode.Length;
long dataStartPosition = dataFileStream.Position;
BinarySerializer.WriteCompressed(dataFileStream, hostCode, DiskCacheCommon.GetCompressionAlgorithm());
offsetAndSize.CompressedSize = (uint)(dataFileStream.Position - dataStartPosition);
tocWriter.Write(ref offsetAndSize);
dataWriter.BeginCompression(DiskCacheCommon.GetCompressionAlgorithm());
for (int index = 0; index < shaders.Length; index++)
{
if (shaders[index] != null)
{
WriteShaderProgramInfo(ref dataWriter, shaders[index].Info);
}
}
dataWriter.EndCompression();
if (streams == null)
{
tocFileStream.Dispose();
dataFileStream.Dispose();
}
}
/// <summary>
/// Writes the host binary code on the host cache.
/// </summary>
/// <param name="context">GPU context</param>
/// <param name="hostCode">Host binary code</param>
/// <param name="programIndex">Index of the program in the cache</param>
/// <param name="streams">Output streams to use</param>
private void WriteHostCode(GpuContext context, ReadOnlySpan <byte> hostCode, int programIndex, DiskCacheOutputStreams streams = null)
{
var tocFileStream = streams != null ? streams.HostTocFileStream : DiskCacheCommon.OpenFile(_basePath, GetHostTocFileName(context), writable: true);
var dataFileStream = streams != null ? streams.HostDataFileStream : DiskCacheCommon.OpenFile(_basePath, GetHostDataFileName(context), writable: true);
if (tocFileStream.Length == 0)
{
TocHeader header = new TocHeader();
CreateToc(tocFileStream, ref header, TochMagic, 0);
}
if (programIndex == -1)
{
tocFileStream.Seek(0, SeekOrigin.End);
}
else
{
tocFileStream.Seek(Unsafe.SizeOf <TocHeader>() + (programIndex * Unsafe.SizeOf <OffsetAndSize>()), SeekOrigin.Begin);
}
dataFileStream.Seek(0, SeekOrigin.End);
BinarySerializer tocWriter = new BinarySerializer(tocFileStream);
OffsetAndSize offsetAndSize = new OffsetAndSize();
offsetAndSize.Offset = (ulong)dataFileStream.Position;
offsetAndSize.Size = (uint)hostCode.Length;
tocWriter.Write(ref offsetAndSize);
BinarySerializer.WriteCompressed(dataFileStream, hostCode, DiskCacheCommon.GetCompressionAlgorithm());
if (streams == null)
{
tocFileStream.Dispose();
dataFileStream.Dispose();
}
}