AddRelationship(
)
{
if (!_curPageRelAdded && CurrentPageReferences)
{
FontEmbeddingAction action = XpsFontSubsetter.DetermineEmbeddingAction(_glyphTypeface);
switch (action)
{
case FontEmbeddingAction.ImageOnlyFont:
break;
case FontEmbeddingAction.ObfuscateOnlyFont:
case FontEmbeddingAction.ObfuscateSubsetFont:
_packagingPolicy.
RelateResourceToCurrentPage(
_fontResourceStream.Uri,
XpsS0Markup.ResourceRelationshipName);
break;
}
}
// Now we are finished with the current page
// and need flag the need for relationship on the next
_curPageRelAdded = false;
}
AddGlyphRunUsage(
GlyphRun glyphRun
)
{
Uri fontUri = null;
FontEmbeddingAction action = XpsFontSubsetter.DetermineEmbeddingAction(_glyphTypeface);
switch (action)
{
//
// Provide an empty image stream. The Glyphs serializer
// will check content type and render adn serialize an
// image into this stream based on content type
//
case FontEmbeddingAction.ImageOnlyFont:
break;
case FontEmbeddingAction.ObfuscateOnlyFont:
fontUri = _fontResourceStream.Uri;
// nothing to do here since the entire font will be added
break;
case FontEmbeddingAction.ObfuscateSubsetFont:
_fontEmbeddingManager.RecordUsage(glyphRun);
fontUri = _fontResourceStream.Uri;
break;
}
return(fontUri);
}
SetFontSubsettingCountPolicy(int countPolicy)
{
IServiceProvider resourceServiceProvider = (IServiceProvider)ResourcePolicy;
XpsFontSerializationService fontService = (XpsFontSerializationService)resourceServiceProvider.GetService(typeof(XpsFontSerializationService));
if (fontService != null)
{
XpsFontSubsetter fontSubsetter = fontService.FontSubsetter;
fontSubsetter.SetSubsetCommitCountPolicy(countPolicy);
}
}
ConvertTo(
ITypeDescriptorContext context,
System.Globalization.CultureInfo culture,
object value,
Type destinationType
)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
Toolbox.EmitEvent(EventTrace.Event.WClientDRXConvertFontBegin);
if (!IsSupportedType(destinationType))
{
throw new NotSupportedException(SR.Get(SRID.Converter_ConvertToNotSupported));
}
PackageSerializationManager manager = (PackageSerializationManager)context.GetService(typeof(XpsSerializationManager));
//
// Ensure that we have a valid GlyphRun instance
//
GlyphRun fontGlyphRun = (GlyphRun)value;
if (fontGlyphRun == null)
{
throw new ArgumentException(SR.Get(SRID.MustBeOfType, "value", "GlyphRun"));
}
//
// Obtain the font serialization service from the serlialization manager.
//
IServiceProvider resourceServiceProvider = manager.ResourcePolicy;
XpsFontSerializationService fontService = (XpsFontSerializationService)resourceServiceProvider.GetService(typeof(XpsFontSerializationService));
if (fontService == null)
{
throw new XpsSerializationException(SR.Get(SRID.ReachSerialization_NoFontService));
}
//
// Retrieve the current font subsetter
//
XpsFontSubsetter fontSubsetter = fontService.FontSubsetter;
//
// Add the font subset to the font subsetter and retrieve a Uri
// to the font within the Xps package.
//
Uri resourceUri = fontSubsetter.ComputeFontSubset(fontGlyphRun);
Toolbox.EmitEvent(EventTrace.Event.WClientDRXConvertFontEnd);
return(resourceUri);
}
AddRestrictedRelationship(
)
{
FontEmbeddingAction action = XpsFontSubsetter.DetermineEmbeddingAction(_glyphTypeface);
if (action != FontEmbeddingAction.ImageOnlyFont &&
XpsFontSubsetter.IsRestrictedFont(_glyphTypeface))
{
_packagingPolicy.
RelateRestrictedFontToCurrentDocument(
_fontResourceStream.Uri
);
}
}
AddGlyphRunUsage(
GlyphRun glyphRun
)
{
Uri fontUri = null;
FontEmbeddingAction action = XpsFontSubsetter.DetermineEmbeddingAction(_glyphTypeface);
switch (action)
{
//
// Provide an empty image stream. The Glyphs serializer
// will check content type and render adn serialize an
// image into this stream based on content type
//
case FontEmbeddingAction.ImageOnlyFont:
break;
case FontEmbeddingAction.ObfuscateOnlyFont:
fontUri = _fontResourceStream.Uri;
// nothing to do here since the entire font will be added
break;
case FontEmbeddingAction.ObfuscateSubsetFont:
CodeAccessPermission uriDiscoveryPermission = glyphRun.GlyphTypeface.CriticalUriDiscoveryPermission;
if (uriDiscoveryPermission != null)
{
uriDiscoveryPermission.Assert();
}
try
{
_fontEmbeddingManager.RecordUsage(glyphRun);
}
finally
{
if (uriDiscoveryPermission != null)
{
CodeAccessPermission.RevertAssert();
}
}
fontUri = _fontResourceStream.Uri;
break;
}
return(fontUri);
}
Commit(
)
{
FontEmbeddingAction action = XpsFontSubsetter.DetermineEmbeddingAction(_glyphTypeface);
switch (action)
{
case FontEmbeddingAction.ImageOnlyFont:
// nothing to do here since the glyph runs have already been converted
break;
case FontEmbeddingAction.ObfuscateOnlyFont:
CopyFontStream();
break;
case FontEmbeddingAction.ObfuscateSubsetFont:
SubSetFont(
_fontEmbeddingManager.GetUsedGlyphs(_fontUri),
_fontResourceStream.Stream
);
break;
}
}
XpsFontSerializationService(
BasePackagingPolicy packagingPolicy
)
{
_fontSubsetter = new XpsFontSubsetter(packagingPolicy);
}