DetermineEmbeddingAction(
FontEmbeddingRight fsType
)
{
FontEmbeddingAction action = FontEmbeddingAction.ObfuscateSubsetFont;
switch (fsType)
{
case FontEmbeddingRight.RestrictedLicense:
case FontEmbeddingRight.PreviewAndPrintButWithBitmapsOnly:
case FontEmbeddingRight.PreviewAndPrintButNoSubsettingAndWithBitmapsOnly:
case FontEmbeddingRight.EditableButWithBitmapsOnly:
case FontEmbeddingRight.EditableButNoSubsettingAndWithBitmapsOnly:
case FontEmbeddingRight.InstallableButWithBitmapsOnly:
case FontEmbeddingRight.InstallableButNoSubsettingAndWithBitmapsOnly:
action = FontEmbeddingAction.ImageOnlyFont;
break;
case FontEmbeddingRight.PreviewAndPrint:
case FontEmbeddingRight.Editable:
case FontEmbeddingRight.Installable:
action = FontEmbeddingAction.ObfuscateSubsetFont;
break;
case FontEmbeddingRight.EditableButNoSubsetting:
case FontEmbeddingRight.PreviewAndPrintButNoSubsetting:
case FontEmbeddingRight.InstallableButNoSubsetting:
action = FontEmbeddingAction.ObfuscateOnlyFont;
break;
}
return(action);
}
private bool FontIsEmbeddable(FontEmbeddingRight rights)
{
switch (rights)
{
case FontEmbeddingRight.Editable:
case FontEmbeddingRight.EditableButNoSubsetting:
case FontEmbeddingRight.Installable:
case FontEmbeddingRight.InstallableButNoSubsetting:
case FontEmbeddingRight.PreviewAndPrint:
case FontEmbeddingRight.PreviewAndPrintButNoSubsetting:
return(true);
}
return(false);
}
IsRestrictedFont(
FontEmbeddingRight fsType
)
{
bool isRestrictedFont = false;
switch (fsType)
{
case FontEmbeddingRight.PreviewAndPrintButNoSubsetting:
case FontEmbeddingRight.PreviewAndPrint:
isRestrictedFont = true;
break;
}
return(isRestrictedFont);
}
ComputeFontSubset(
GlyphRun glyphRun
)
{
if (null == glyphRun)
{
throw new ArgumentNullException("glyphRun");
}
FontEmbeddingRight embeddingRights = glyphRun.GlyphTypeface.EmbeddingRights;
Uri fontUri = null;
if (DetermineEmbeddingAction(embeddingRights) ==
FontEmbeddingAction.ImageOnlyFont)
{
//
// Aquire a bit map stream to embedd the Glyph Run image
//
fontUri = _packagingPolicy.AcquireResourceStreamForXpsImage(XpsS0Markup.ImageUriPlaceHolder).Uri;
}
else
{
FEMCacheItem cacheItem = AcquireCacheItem(
glyphRun.GlyphTypeface
);
if (cacheItem != null)
{
cacheItem.CurrentPageReferences = true;
if (_commitPolicy == FontSubsetterCommitPolicies.None &&
!cacheItem.IsStreamWritten)
{
fontUri = cacheItem.CopyFontStream();
}
else
{
fontUri = cacheItem.AddGlyphRunUsage(glyphRun);
}
}
}
return(fontUri);
}
IsRestrictedFont(GlyphTypeface glyphTypeface)
{
FontEmbeddingRight fsType = FontEmbeddingRight.RestrictedLicense;
CodeAccessPermission fontReadPermission = glyphTypeface.CriticalFileReadPermission;
if (fontReadPermission != null)
{
fontReadPermission.Assert();
}
try
{
fsType = glyphTypeface.EmbeddingRights;
}
finally
{
if (fontReadPermission != null)
{
CodeAccessPermission.RevertAssert();
}
}
return(IsRestrictedFont(fsType));
}
ComputeFontSubset(
GlyphRun glyphRun
)
{
FontEmbeddingRight embeddingRights = FontEmbeddingRight.RestrictedLicense;
if (null == glyphRun)
{
throw new ArgumentNullException("glyphRun");
}
Uri fontUri = null;
CodeAccessPermission fontReadPermission = glyphRun.GlyphTypeface.CriticalFileReadPermission;
if (fontReadPermission != null)
{
fontReadPermission.Assert();
}
try
{
embeddingRights = glyphRun.GlyphTypeface.EmbeddingRights;
}
finally
{
if (fontReadPermission != null)
{
CodeAccessPermission.RevertAssert();
}
}
if (DetermineEmbeddingAction(embeddingRights) ==
FontEmbeddingAction.ImageOnlyFont)
{
//
// Aquire a bit map stream to embedd the Glyph Run image
//
fontUri = _packagingPolicy.AcquireResourceStreamForXpsImage(XpsS0Markup.ImageUriPlaceHolder).Uri;
}
else
{
FEMCacheItem cacheItem = AcquireCacheItem(
glyphRun.GlyphTypeface
);
if (cacheItem != null)
{
cacheItem.CurrentPageReferences = true;
if (_commitPolicy == FontSubsetterCommitPolicies.None &&
!cacheItem.IsStreamWritten)
{
fontUri = cacheItem.CopyFontStream();
}
else
{
fontUri = cacheItem.AddGlyphRunUsage(glyphRun);
}
}
}
return(fontUri);
}