public void WriteFormat2Data(SerializationInfo info, StreamingContext context)
{
DeferredFormatter deferred = context.Context as DeferredFormatter;
if (deferred != null)
{
info.AddValue("deferred", true);
deferred.AddDeferredObject(this, this.length);
}
else
{
WriteFormat1Data(info, context);
}
}
private MemoryBlock(SerializationInfo info, StreamingContext context)
{
disposed = false;
// Try to read a 64-bit value, and for backwards compatibility fall back on a 32-bit value.
try
{
this.length = info.GetInt64("length64");
}
catch (SerializationException)
{
this.length = (long)info.GetInt32("length");
}
try
{
this.bitmapWidth = (int)info.GetInt32("bitmapWidth");
this.bitmapHeight = (int)info.GetInt32("bitmapHeight");
if (this.bitmapWidth != 0 || this.bitmapHeight != 0)
{
long bytes = (long)this.bitmapWidth * (long)this.bitmapHeight * (long)ColorBgra.SizeOf;
if (bytes != this.length)
{
throw new ApplicationException("Invalid file format: width * height * 4 != length");
}
}
}
catch (SerializationException)
{
this.bitmapWidth = 0;
this.bitmapHeight = 0;
}
bool hasParent = info.GetBoolean("hasParent");
if (hasParent)
{
this.parentBlock = (MemoryBlock)info.GetValue("parentBlock", typeof(MemoryBlock));
// Try to read a 64-bit value, and for backwards compatibility fall back on a 32-bit value.
long parentOffset;
try
{
parentOffset = info.GetInt64("parentOffset64");
}
catch (SerializationException)
{
parentOffset = (long)info.GetInt32("parentOffset");
}
this.voidStar = (void *)((byte *)parentBlock.VoidStar + parentOffset);
this.valid = true;
}
else
{
DeferredFormatter deferredFormatter = context.Context as DeferredFormatter;
bool deferred = false;
// Was this stream serialized with deferment?
foreach (SerializationEntry entry in info)
{
if (entry.Name == "deferred")
{
deferred = (bool)entry.Value;
break;
}
}
if (deferred && deferredFormatter != null)
{
// The newest PDN files use deferred deserialization. This lets us read straight from the stream,
// minimizing memory use and adding the potential for multithreading
// Deserialization will complete in IDeferredDeserializer.FinishDeserialization()
deferredFormatter.AddDeferredObject(this, this.length);
}
else if (deferred && deferredFormatter == null)
{
throw new InvalidOperationException("stream has deferred serialization streams, but a DeferredFormatter was not provided");
}
else
{
this.voidStar = Allocate(this.length).ToPointer();
this.valid = true;
// Non-deferred format serializes one big byte[] chunk. This is also
// how PDN files were saved with v2.1 Beta 2 and before.
byte[] array = (byte[])info.GetValue("pointerData", typeof(byte[]));
fixed(byte *pbArray = array)
{
Memory.Copy(this.VoidStar, (void *)pbArray, (ulong)array.LongLength);
}
}
}
}