/// <summary>
/// Caches a font source under its face name and its key.
/// </summary>
public static XFontSource CacheFontSource(XFontSource fontSource)
{
try
{
Lock.EnterFontFactory();
// Check whether an identical font source with a different face name already exists.
XFontSource existingFontSource;
if (FontSourcesByKey.TryGetValue(fontSource.Key, out existingFontSource))
{
#if DEBUG
// Fonts have same length and check sum. Now check byte by byte identity.
int length = fontSource.Bytes.Length;
for (int idx = 0; idx < length; idx++)
{
if (existingFontSource.Bytes[idx] != fontSource.Bytes[idx])
{
//Debug.Assert(false,"Two fonts with identical checksum found.");
break;
//goto FontsAreNotIdentical;
}
}
Debug.Assert(existingFontSource.Fontface != null);
#endif
return(existingFontSource);
//FontsAreNotIdentical:
//// Incredible rare case: Two different fonts have the same size and check sum.
//// Give the new one a new key until it do not clash with an existing one.
//while (FontSourcesByKey.ContainsKey(fontSource.Key))
// fontSource.IncrementKey();
}
var fontface = fontSource.Fontface;
if (fontface == null)
{
// Create OpenType fontface for this font source.
try
{
fontSource.Fontface = new OpenTypeFontface(fontSource);
}
catch (InvalidOperationException)
{
// todo: log
}
}
if (fontSource.FontName == null)
{
return(null);
}
FontSourcesByKey.Add(fontSource.Key, fontSource);
FontSourcesByName.Add(fontSource.FontName, fontSource);
return(fontSource);
}
finally { Lock.ExitFontFactory(); }
}
/// <summary>
/// Caches a font source under its face name and its key.
/// </summary>
public static XFontSource CacheNewFontSource(string typefaceKey, XFontSource fontSource)
{
// Debug.Assert(!FontSourcesByFaceName.ContainsKey(fontSource.FaceName));
// Check whether an identical font source with a different face name already exists.
XFontSource existingFontSource;
if (FontSourcesByKey.TryGetValue(fontSource.Key, out existingFontSource))
{
//// Fonts have same length and check sum. Now check byte by byte identity.
//int length = fontSource.Bytes.Length;
//for (int idx = 0; idx < length; idx++)
//{
// if (existingFontSource.Bytes[idx] != fontSource.Bytes[idx])
// {
// goto FontsAreNotIdentical;
// }
//}
return(existingFontSource);
////// The bytes are really identical. Register font source again with the new face name
////// but return the existing one to save memory.
////FontSourcesByFaceName.Add(fontSource.FaceName, existingFontSource);
////return existingFontSource;
//FontsAreNotIdentical:
//// Incredible rare case: Two different fonts have the same size and check sum.
//// Give the new one a new key until it do not clash with an existing one.
//while (FontSourcesByKey.ContainsKey(fontSource.Key))
// fontSource.IncrementKey();
}
OpenTypeFontface fontface = fontSource.Fontface;
if (fontface == null)
{
fontface = new OpenTypeFontface(fontSource);
fontSource.Fontface = fontface; // Also sets the font name in fontSource
}
FontSourcesByName.Add(typefaceKey, fontSource);
FontSourcesByName.Add(fontSource.FontName, fontSource);
FontSourcesByKey.Add(fontSource.Key, fontSource);
return(fontSource);
}