/// <summary>
/// Implements common copy code for CloneCore(), CloneCurrentValueCore(), GetAsFrozenCore(), and
/// GetCurrentValueAsFrozenCore()
/// </summary>
/// <param name="sourceBitmapMetadata"></param>
private void CopyCommon(BitmapMetadata sourceBitmapMetadata)
{
BitmapMetadataBlockWriter blockWriter = sourceBitmapMetadata.BlockWriter;
if (blockWriter == null)
{
// If source is a metadata
InitializeFromMetadataWriter(sourceBitmapMetadata._metadataHandle, sourceBitmapMetadata._syncObject);
}
if (_metadataHandle == null)
{
if (blockWriter != null)
{
InitializeFromBlockWriter(blockWriter, sourceBitmapMetadata._syncObject);
}
else
{
InitializeFromBlockWriter(sourceBitmapMetadata.GuidFormat, false, false);
SetQuery("/", sourceBitmapMetadata);
}
}
_fixedSize = sourceBitmapMetadata._fixedSize;
}
internal BitmapMetadataBlockWriterEnumerator(
BitmapMetadataBlockWriter blockWriter
)
{
Debug.Assert(blockWriter != null);
Debug.Assert(blockWriter.MetadataBlocks != null);
_metadataBlocks = blockWriter.MetadataBlocks;
_index = 0;
}
/// <summary>
///
/// </summary>
private void InitializeFromBlockWriter(BitmapMetadataBlockWriter sourceBlockWriter, object syncObject)
{
IntPtr /* IWICMetadataBlockWriter */ blockWriter = IntPtr.Zero;
IntPtr /* IWICMetadataQueryWriter */ queryWriter = IntPtr.Zero;
using (FactoryMaker factoryMaker = new FactoryMaker())
{
try
{
// Otherwise, simulate a metadata block writer for this imaging container format.
_blockWriter = new BitmapMetadataBlockWriter(sourceBlockWriter, syncObject);
blockWriter = Marshal.GetComInterfaceForObject(
_blockWriter,
typeof(System.Windows.Media.Imaging.BitmapMetadata.IWICMetadataBlockWriter));
HRESULT.Check(UnsafeNativeMethods.WICComponentFactory.CreateQueryWriterFromBlockWriter(
factoryMaker.ImagingFactoryPtr,
blockWriter,
ref queryWriter
));
_readOnly = false;
_fixedSize = false;
_metadataHandle = new SafeMILHandle(queryWriter);
queryWriter = IntPtr.Zero;
_syncObject = _metadataHandle;
}
finally
{
if (blockWriter != IntPtr.Zero)
{
#pragma warning suppress 6031 // Return value ignored on purpose.
UnsafeNativeMethods.MILUnknown.Release(blockWriter);
}
if (queryWriter != IntPtr.Zero)
{
#pragma warning suppress 6031 // Return value ignored on purpose.
UnsafeNativeMethods.MILUnknown.Release(queryWriter);
}
}
}
}
internal BitmapMetadataBlockWriter(BitmapMetadataBlockWriter blockWriter, object syncObject)
{
Guid guidVendor = new Guid(MILGuidData.GUID_VendorMicrosoft);
_fixedSize = blockWriter._fixedSize;
_containerFormat = blockWriter._containerFormat;
_metadataBlocks = new ArrayList();
ArrayList metadataBlocks = blockWriter.MetadataBlocks;
using (FactoryMaker factoryMaker = new FactoryMaker())
{
foreach (SafeMILHandle metadataHandle in metadataBlocks)
{
lock (syncObject)
{
IntPtr pIMetadataWriter = IntPtr.Zero;
try
{
HRESULT.Check(UnsafeNativeMethods.WICComponentFactory.CreateMetadataWriterFromReader(
factoryMaker.ImagingFactoryPtr,
metadataHandle,
ref guidVendor,
out pIMetadataWriter
));
SafeMILHandle metadataWriter = new SafeMILHandle(pIMetadataWriter);
pIMetadataWriter = IntPtr.Zero;
_metadataBlocks.Add(metadataWriter);
}
finally
{
if (pIMetadataWriter != IntPtr.Zero)
{
#pragma warning suppress 6031 // Return value ignored on purpose.
UnsafeNativeMethods.MILUnknown.Release(pIMetadataWriter);
}
}
}
}
}
}
