public static unsafe Image LoadFromMemory(IntPtr pSource, int size, bool makeACopy, GCHandle? handle)
{
var stream = new BinarySerializationReader(new NativeMemoryStream((byte*)pSource, size));
// Read and check magic code
var magicCode = stream.ReadUInt32();
if (magicCode != MagicCode)
return null;
// Read header
var imageDescription = new ImageDescription();
imageDescriptionSerializer.Serialize(ref imageDescription, ArchiveMode.Deserialize, stream);
if (makeACopy)
{
var buffer = Utilities.AllocateMemory(size);
Utilities.CopyMemory(buffer, pSource, size);
pSource = buffer;
makeACopy = false;
}
var image = new Image(imageDescription, pSource, 0, handle, !makeACopy);
var totalSizeInBytes = stream.ReadInt32();
if (totalSizeInBytes != image.TotalSizeInBytes)
throw new InvalidOperationException("Image size is different than expected.");
// Read image data
stream.Serialize(image.DataPointer, image.TotalSizeInBytes);
return image;
}
private KeyValuePair<EffectBytecode, EffectBytecodeCacheLoadSource> LoadEffectBytecode(DatabaseFileProvider database, ObjectId bytecodeId)
{
KeyValuePair<EffectBytecode, EffectBytecodeCacheLoadSource> bytecodePair;
if (!bytecodes.TryGetValue(bytecodeId, out bytecodePair))
{
if (!bytecodesByPassingStorage.Contains(bytecodeId) && database.ObjectDatabase.Exists(bytecodeId))
{
using (var stream = database.ObjectDatabase.OpenStream(bytecodeId))
{
var bytecode = EffectBytecode.FromStream(stream);
// Try to read an integer that would specify what kind of cache it belongs to (if undefined because of old versions, mark it as dynamic cache)
var cacheSource = EffectBytecodeCacheLoadSource.DynamicCache;
if (stream.Position < stream.Length)
{
var binaryReader = new BinarySerializationReader(stream);
cacheSource = (EffectBytecodeCacheLoadSource)binaryReader.ReadInt32();
}
bytecodePair = new KeyValuePair<EffectBytecode, EffectBytecodeCacheLoadSource>(bytecode, cacheSource);
}
}
if (bytecodePair.Key != null)
{
bytecodes.Add(bytecodeId, bytecodePair);
}
}
// Always check that the bytecode is in sync with hash sources on all platforms
if (bytecodePair.Key != null && IsBytecodeObsolete(bytecodePair.Key))
{
bytecodes.Remove(bytecodeId);
bytecodePair = new KeyValuePair<EffectBytecode, EffectBytecodeCacheLoadSource>(null, EffectBytecodeCacheLoadSource.JustCompiled);
}
return bytecodePair;
}