/// <summary>
/// Extracts the raw data for a resource.
/// </summary>
/// <param name="resource">The resource.</param>
/// <param name="outStream">The stream to write the extracted data to.</param>
/// <exception cref="System.ArgumentException">Thrown if the output stream is not open for writing.</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the file containing the resource has not been loaded.</exception>
public void Extract(ResourceReference resource, Stream outStream)
{
if (resource == null)
throw new ArgumentNullException("resource");
if (!outStream.CanWrite)
throw new ArgumentException("The output stream is not open for writing", "outStream");
var cache = GetCache(resource);
using (var stream = cache.File.OpenRead())
cache.Cache.Decompress(stream, resource.Index, resource.CompressedSize, outStream);
}
public ResourceSerializationContext(ResourceReference resource)
{
_resource = resource;
}
/// <summary>
/// Replaces the raw data for a resource.
/// </summary>
/// <param name="resource">The resource whose data should be replaced. On success, the reference will be adjusted to account for the new data.</param>
/// <param name="dataStream">The stream to read the new data from.</param>
/// <exception cref="System.ArgumentException">Thrown if the input stream is not open for reading.</exception>
public void Replace(ResourceReference resource, Stream dataStream)
{
if (resource == null)
throw new ArgumentNullException("resource");
if (!dataStream.CanRead)
throw new ArgumentException("The input stream is not open for reading", "dataStream");
var cache = GetCache(resource);
using (var stream = cache.File.Open(FileMode.Open, FileAccess.ReadWrite))
{
var dataSize = (int)(dataStream.Length - dataStream.Position);
var data = new byte[dataSize];
dataStream.Read(data, 0, dataSize);
var compressedSize = cache.Cache.Compress(stream, resource.Index, data);
resource.CompressedSize = compressedSize;
resource.DecompressedSize = (uint)dataSize;
resource.LocationFlags &= ~(ResourceLocationFlags.UseChecksum | ResourceLocationFlags.UseChecksum2);
}
}
private LoadedCache GetCache(ResourceReference resource)
{
LoadedCache cache;
if (!_loadedCaches.TryGetValue(resource.GetLocation(), out cache))
throw new InvalidOperationException("The requested resource is located in " + resource.GetLocation() + ", but the corresponding cache file has not been loaded.");
return cache;
}
