/// <summary>
/// Copies bytes from one area of memory to another. Since this function works
/// with MemoryBlock instances, it does bounds checking.
/// </summary>
/// <param name="dst">The MemoryBlock to copy bytes to.</param>
/// <param name="dstOffset">The offset within dst to copy bytes to.</param>
/// <param name="src">The MemoryBlock to copy bytes from.</param>
/// <param name="srcOffset">The offset within src to copy bytes from.</param>
/// <param name="length">The number of bytes to copy.</param>
public static void CopyBlock(MemoryBlock dst, long dstOffset, MemoryBlock src, long srcOffset, long length)
{
if ((dstOffset + length > dst.length) || (srcOffset + length > src.length))
{
throw new ArgumentOutOfRangeException("", "copy ranges were out of bounds");
}
if (dstOffset < 0)
{
throw new ArgumentOutOfRangeException("dstOffset", dstOffset, "must be >= 0");
}
if (srcOffset < 0)
{
throw new ArgumentOutOfRangeException("srcOffset", srcOffset, "must be >= 0");
}
if (length < 0)
{
throw new ArgumentOutOfRangeException("length", length, "must be >= 0");
}
void *dstPtr = (void *)((byte *)dst.VoidStar + dstOffset);
void *srcPtr = (void *)((byte *)src.VoidStar + srcOffset);
PlatformMemory.Copy(dstPtr, srcPtr, (ulong)length);
}
public byte[] ToByteArray(long startOffset, long lengthDesired)
{
if (disposed)
{
throw new ObjectDisposedException("MemoryBlock");
}
if (startOffset < 0)
{
throw new ArgumentOutOfRangeException("startOffset", "must be greater than or equal to zero");
}
if (lengthDesired < 0)
{
throw new ArgumentOutOfRangeException("length", "must be greater than or equal to zero");
}
if (startOffset + lengthDesired > this.length)
{
throw new ArgumentOutOfRangeException("startOffset, length", "startOffset + length must be less than Length");
}
byte[] dstArray = new byte[lengthDesired];
byte * pbSrcArray = (byte *)this.VoidStar;
fixed(byte *pbDstArray = dstArray)
{
PlatformMemory.Copy(pbDstArray, pbSrcArray + startOffset, (ulong)lengthDesired);
}
return(dstArray);
}
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);
throw new StillNotPortedException();
}
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)
{
PlatformMemory.Copy(this.VoidStar, (void *)pbArray, (ulong)array.LongLength);
}
}
}
}
public unsafe override void Apply(ColorBgra *dst, ColorBgra *src, int length)
{
PlatformMemory.Copy(dst, src, (ulong)length * (ulong)ColorBgra.SizeOf);
}