/// <Summary>
/// Releases a reference to the current XpsFont ResourceStream.</Summary>
/// <param name="resourceId">
/// ID of the Resource to release.</param>
public override void ReleaseResourceStreamForXpsFont(String resourceId)
{
ResourceStreamCacheItem resourceStreamCacheItem = (ResourceStreamCacheItem)_fontsCache[resourceId];
if (resourceStreamCacheItem != null)
{
if (resourceStreamCacheItem.Release() == 0)
{
_fontsCache.Remove(resourceId);
}
}
else
{
throw new XpsSerializationException("Cannot release XmlWriter");
}
}
// ------------------- AcquireResourceStreamForXpsFont -------------------
/// <Summary>
/// Acquires a ResourceStream for an XpsFont with a specified ID.</Summary>
/// <param name="resourceId">
/// The ID of the Resource.</param>
public override XpsResourceStream AcquireResourceStreamForXpsFont(String resourceId)
{
XpsResourceStream resourceStream = null;
ResourceStreamCacheItem resourceStreamCacheItem =
(ResourceStreamCacheItem)_fontsCache[resourceId];
if (resourceStreamCacheItem == null)
{
resourceStreamCacheItem = new ResourceStreamCacheItem();
//
// We need to create the corresponding part in the Xps package
// and then acquire the Stream
//
Stream fontStream = null;
String fileName;
if (_currentFixedPageHelper != null)
{
// Create a new Font Stream
fileName = FileHelper.GenerateFileName(XpsFileType.Font, _path);
fontStream = FileHelper.CreateFile(fileName, _path);
if (fontStream != null)
{
resourceStreamCacheItem.XpsResource = null;
//
// retreive the appropriate stream and uri from the package API layer
//
String fileUri = "/" + fileName;
_fontResourceStream = new XpsResourceStream(
fontStream, new Uri(fileUri, UriKind.Relative));
resourceStreamCacheItem.XpsResourceStream = _fontResourceStream;
_fontsCache[resourceId] = resourceStreamCacheItem;
resourceStream = _fontResourceStream;
//Add Obfuscatedfont type to content type file
_contentTypeFile.AddType(XpsFileType.ObfuscatedFont,
FileHelper.GetExtension(XpsFileType.ObfuscatedFont));
fontStream = null;
}
else
{
throw new ArgumentNullException("Could not create FontStream");
}
}
else
{
throw new XpsSerializationException("No FixedPage Writer");
}
}
else
{
resourceStream = resourceStreamCacheItem.XpsResourceStream;
resourceStreamCacheItem.IncRef();
}
//Add relationship to fixedpage for resource stream
_fixedPageRelationshipStream.AddFixedRelationship(
_requiredResource, resourceStream.Uri.ToString());
return(resourceStream);
}