/// <summary>
/// Create a WPF GlyphTypeface and retrieve font data from it.
/// </summary>
internal static XFontSource CreateFontSource(string familyName, FontResolvingOptions fontResolvingOptions,
out WpfFontFamily wpfFontFamily, out WpfTypeface wpfTypeface, out WpfGlyphTypeface wpfGlyphTypeface, string typefaceKey)
{
if (string.IsNullOrEmpty(typefaceKey))
{
typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions);
}
XFontStyle style = fontResolvingOptions.FontStyle;
#if DEBUG
if (StringComparer.OrdinalIgnoreCase.Compare(familyName, "Segoe UI Semilight") == 0 &&
(style & XFontStyle.BoldItalic) == XFontStyle.Italic)
{
familyName.GetType();
}
#endif
// Use WPF technique to create font data.
wpfTypeface = XPrivateFontCollection.TryCreateTypeface(familyName, style, out wpfFontFamily);
#if DEBUG__
if (wpfTypeface != null)
{
WpfGlyphTypeface glyphTypeface;
ICollection <WpfTypeface> list = wpfFontFamily.GetTypefaces();
foreach (WpfTypeface tf in list)
{
if (!tf.TryGetGlyphTypeface(out glyphTypeface))
{
Debug - Break.Break();
}
}
//if (!WpfTypeface.TryGetGlyphTypeface(out glyphTypeface))
// throw new InvalidOperationException(PSSR.CannotGetGlyphTypeface(familyName));
}
#endif
if (wpfFontFamily == null)
{
wpfFontFamily = new WpfFontFamily(familyName);
}
if (wpfTypeface == null)
{
wpfTypeface = FontHelper.CreateTypeface(wpfFontFamily, style);
}
// Let WPF choose the right glyph typeface.
if (!wpfTypeface.TryGetGlyphTypeface(out wpfGlyphTypeface))
{
throw new InvalidOperationException(PSSR.CannotGetGlyphTypeface(familyName));
}
// Get or create the font source and cache it under the specified typeface key.
XFontSource fontSource = XFontSource.GetOrCreateFromWpf(typefaceKey, wpfGlyphTypeface);
return(fontSource);
}
//// Suffix for internal face names to indicate that the font data comes from the platform
//// and not from the users font resolver.
//public const string PlatformTag = "platform:";
/// <summary>
/// Converts specified information about a required typeface into a specific font.
/// </summary>
/// <param name="familyName">Name of the font family.</param>
/// <param name="fontResolvingOptions">The font resolving options.</param>
/// <param name="typefaceKey">Typeface key if already known by caller, null otherwise.</param>
/// <returns>
/// Information about the typeface, or null if no typeface can be found.
/// </returns>
public static FontResolverInfo ResolveTypeface(string familyName, FontResolvingOptions fontResolvingOptions, string typefaceKey)
{
if (String.IsNullOrEmpty(typefaceKey))
{
typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions);
}
try
{
Lock.EnterFontFactory();
// Was this typeface requested before?
if (FontResolverInfosByName.TryGetValue(typefaceKey, out FontResolverInfo fontResolverInfo))
{
return(fontResolverInfo);
}
// Case: This typeface was not yet resolved before.
// Is there a custom font resolver available?
IFontResolver customFontResolver = GlobalFontSettings.FontResolver;
if (customFontResolver != null)
{
// Case: Use custom font resolver.
fontResolverInfo = customFontResolver.ResolveTypeface(familyName, fontResolvingOptions.IsBold, fontResolvingOptions.IsItalic);
// If resolved by custom font resolver register info and font source.
if (fontResolverInfo != null && !(fontResolverInfo is PlatformFontResolverInfo))
{
// OverrideStyleSimulations is true only for internal quality tests.
if (fontResolvingOptions.OverrideStyleSimulations)
{
// Override style simulation returned by custom font resolver.
fontResolverInfo = new FontResolverInfo(fontResolverInfo.FaceName, fontResolvingOptions.MustSimulateBold, fontResolvingOptions.MustSimulateItalic, fontResolverInfo.CollectionNumber);
}
string resolverInfoKey = fontResolverInfo.Key;
if (FontResolverInfosByName.TryGetValue(resolverInfoKey, out FontResolverInfo existingFontResolverInfo))
{
// Case: A new typeface was resolved with the same info as a previous one.
// Discard new object an reuse previous one.
fontResolverInfo = existingFontResolverInfo;
// Associate with typeface key.
FontResolverInfosByName.Add(typefaceKey, fontResolverInfo);
#if DEBUG
// The font source should exist.
Debug.Assert(FontSourcesByName.ContainsKey(fontResolverInfo.FaceName));
#endif
}
else
{
// Case: No such font resolver info exists.
// Add to both dictionaries.
FontResolverInfosByName.Add(typefaceKey, fontResolverInfo);
Debug.Assert(resolverInfoKey == fontResolverInfo.Key);
FontResolverInfosByName.Add(resolverInfoKey, fontResolverInfo);
// Create font source if not yet exists.
if (FontSourcesByName.TryGetValue(fontResolverInfo.FaceName, out XFontSource previousFontSource))
{
// Case: The font source exists, because a previous font resolver info comes
// with the same face name, but was different in style simulation flags.
// Nothing to do.
}
else
{
// Case: Get font from custom font resolver and create font source.
byte[] bytes = customFontResolver.GetFont(fontResolverInfo.FaceName);
XFontSource fontSource = XFontSource.GetOrCreateFrom(bytes);
// Add font source's font resolver name if it is different to the face name.
if (String.Compare(fontResolverInfo.FaceName, fontSource.FontName, StringComparison.OrdinalIgnoreCase) != 0)
{
FontSourcesByName.Add(fontResolverInfo.FaceName, fontSource);
}
}
}
}
}
else
{
// Case: There was no custom font resolver set.
// Use platform font resolver.
// If it was successful resolver info and font source are cached
// automatically by PlatformFontResolver.ResolveTypeface.
fontResolverInfo = PlatformFontResolver.ResolveTypeface(familyName, fontResolvingOptions, typefaceKey);
}
// Return value is null if the typeface could not be resolved.
// In this case PDFSharp stops.
return(fontResolverInfo);
}
finally { Lock.ExitFontFactory(); }
}
/// <summary>
/// Internal implementation.
/// </summary>
internal static FontResolverInfo ResolveTypeface(string familyName, FontResolvingOptions fontResolvingOptions, string typefaceKey)
{
// Internally we often have the typeface key already.
if (String.IsNullOrEmpty(typefaceKey))
{
typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions);
}
// The user may call ResolveTypeface anytime from anywhere, so check cache in FontFactory in the first place.
if (FontFactory.TryGetFontResolverInfoByTypefaceKey(typefaceKey, out FontResolverInfo fontResolverInfo))
{
return(fontResolverInfo);
}
// Let the platform create the requested font source and save both PlattformResolverInfo
// and XFontSource in FontFactory cache.
// It is possible that we already have the correct font source. E.g. we already have the regular typeface in cache
// and looking now for the italic typeface, but no such font exists. In this case we get the regular font source
// and cache again it with the italic typeface key. Furthermore in glyph typeface style simulation for italic is set.
#if (CORE || GDI) && !WPF
XFontSource fontSource = CreateFontSource(familyName, fontResolvingOptions, out GdiFont gdiFont, typefaceKey);
#endif
#if WPF && !SILVERLIGHT
WpfFontFamily wpfFontFamily;
WpfTypeface wpfTypeface;
WpfGlyphTypeface wpfGlyphTypeface;
XFontSource fontSource = CreateFontSource(familyName, fontResolvingOptions, out wpfFontFamily, out wpfTypeface, out wpfGlyphTypeface, typefaceKey);
#endif
#if SILVERLIGHT
//GlyphTypeface wpfGlyphTypeface;
XFontSource fontSource = null;//CreateFontSource(familyName, isBold, isItalic, out wpfGlyphTypeface, typefaceKey);
#endif
#if NETFX_CORE || UWP
//GlyphTypeface wpfGlyphTypeface;
XFontSource fontSource = null;//CreateFontSource(familyName, isBold, isItalic, out wpfGlyphTypeface, typefaceKey);
#endif
// If no such font exists return null. PDFSharp will fail.
if (fontSource == null)
{
return(null);
}
//#if (CORE || GDI) && !WPF
// // TODO: Support style simulation for GDI+ platform fonts.
// fontResolverInfo = new PlatformFontResolverInfo(typefaceKey, false, false, gdiFont);
//#endif
if (fontResolvingOptions.OverrideStyleSimulations)
{
#if (CORE || GDI) && !WPF
// TODO: Support style simulation for GDI+ platform fonts.
fontResolverInfo = new PlatformFontResolverInfo(typefaceKey, fontResolvingOptions.MustSimulateBold, fontResolvingOptions.MustSimulateItalic, gdiFont);
#endif
#if WPF && !SILVERLIGHT
fontResolverInfo = new PlatformFontResolverInfo(typefaceKey, fontResolvingOptions.MustSimulateBold, fontResolvingOptions.MustSimulateItalic,
wpfFontFamily, wpfTypeface, wpfGlyphTypeface);
#endif
}
else
{
#if (CORE || GDI) && !WPF
bool mustSimulateBold = gdiFont.Bold && !fontSource.Fontface.os2.IsBold;
bool mustSimulateItalic = gdiFont.Italic && !fontSource.Fontface.os2.IsItalic;
fontResolverInfo = new PlatformFontResolverInfo(typefaceKey, mustSimulateBold, mustSimulateItalic, gdiFont);
#endif
#if WPF && !SILVERLIGHT
// WPF knows what styles have to be simulated.
bool mustSimulateBold = (wpfGlyphTypeface.StyleSimulations & WpfStyleSimulations.BoldSimulation) == WpfStyleSimulations.BoldSimulation;
bool mustSimulateItalic = (wpfGlyphTypeface.StyleSimulations & WpfStyleSimulations.ItalicSimulation) == WpfStyleSimulations.ItalicSimulation;
// Weird behavior of WPF is fixed here in case we request a bold italic typeface.
// If only italic is available, bold is simulated based on italic.
// If only bold is available, italic is simulated based on bold.
// But if both bold and italic is available, italic face is used and bold is simulated.
// The latter case is reversed here, i.e. bold face is used and italic is simulated.
if (fontResolvingOptions.IsBoldItalic && mustSimulateBold && !mustSimulateItalic)
{
// Try to get the bold typeface.
string typefaceKeyBold = XGlyphTypeface.ComputeKey(familyName, true, false);
FontResolverInfo infoBold = ResolveTypeface(familyName,
new FontResolvingOptions(FontHelper.CreateStyle(true, false)), typefaceKeyBold);
// Use it if it does not base on simulation.
if (infoBold != null && infoBold.StyleSimulations == XStyleSimulations.None)
{
// Use existing bold typeface and simulate italic.
fontResolverInfo = new PlatformFontResolverInfo(typefaceKeyBold, false, true,
wpfFontFamily, wpfTypeface, wpfGlyphTypeface);
}
else
{
// Simulate both.
fontResolverInfo = new PlatformFontResolverInfo(typefaceKey, true, true,
wpfFontFamily, wpfTypeface, wpfGlyphTypeface);
}
}
else
{
fontResolverInfo = new PlatformFontResolverInfo(typefaceKey, mustSimulateBold, mustSimulateItalic,
wpfFontFamily, wpfTypeface, wpfGlyphTypeface);
}
#endif
}
#if SILVERLIGHT
fontResolverInfo = null; //new PlattformResolverInfo(typefaceKey, false, false, wpfGlyphTypeface);
#endif
FontFactory.CacheFontResolverInfo(typefaceKey, fontResolverInfo);
// Register font data under the platform specific face name.
// Already done in CreateFontSource.
// FontFactory.CacheNewFontSource(typefaceKey, fontSource);
return(fontResolverInfo);
}
/// <summary>
/// Resolves the typeface by generating a font resolver info.
/// </summary>
/// <param name="familyName">Name of the font family.</param>
/// <param name="isBold">Indicates whether a bold font is requested.</param>
/// <param name="isItalic">Indicates whether an italic font is requested.</param>
public static FontResolverInfo ResolveTypeface(string familyName, bool isBold, bool isItalic)
{
FontResolvingOptions fontResolvingOptions = new FontResolvingOptions(FontHelper.CreateStyle(isBold, isItalic));
return(ResolveTypeface(familyName, fontResolvingOptions, XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions)));
}
/// <summary>
/// Create a GDI+ font and use its handle to retrieve font data using native calls.
/// </summary>
internal static XFontSource CreateFontSource(string familyName, FontResolvingOptions fontResolvingOptions, out GdiFont font, string typefaceKey)
{
if (String.IsNullOrEmpty(typefaceKey))
{
typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions);
}
#if true_
if (familyName == "Cambria")
{
Debug - Break.Break();
}
#endif
GdiFontStyle gdiStyle = (GdiFontStyle)(fontResolvingOptions.FontStyle & XFontStyle.BoldItalic);
// Create a 10 point GDI+ font as an exemplar.
font = FontHelper.CreateFont(familyName, 10, gdiStyle, out XFontSource fontSource);
if (fontSource != null)
{
Debug.Assert(font != null);
// Case: Font was created by a GDI+ private font collection.
#if true
#if DEBUG
Debug.Assert(FontFactory.TryGetFontSourceByTypefaceKey(typefaceKey, out XFontSource existingFontSource) &&
ReferenceEquals(fontSource, existingFontSource));
#endif
#else
// Win32 API cannot get font data from fonts created by private font collection,
// because this is handled internally in GDI+.
// Therefore the font source was created when the private font is added to the private font collection.
if (!FontFactory.TryGetFontSourceByTypefaceKey(typefaceKey, out fontSource))
{
// Simplify styles.
// (The code is written for clarity - do not rearrange for optimization)
if (font.Bold && font.Italic)
{
if (FontFactory.TryGetFontSourceByTypefaceKey(XGlyphTypeface.ComputeKey(font.Name, true, false), out fontSource))
{
// Use bold font.
FontFactory.CacheExistingFontSourceWithNewTypefaceKey(typefaceKey, fontSource);
}
else if (FontFactory.TryGetFontSourceByTypefaceKey(XGlyphTypeface.ComputeKey(font.Name, false, true), out fontSource))
{
// Use italic font.
FontFactory.CacheExistingFontSourceWithNewTypefaceKey(typefaceKey, fontSource);
}
else if (FontFactory.TryGetFontSourceByTypefaceKey(XGlyphTypeface.ComputeKey(font.Name, false, false), out fontSource))
{
// Use regular font.
FontFactory.CacheExistingFontSourceWithNewTypefaceKey(typefaceKey, fontSource);
}
}
else if (font.Bold || font.Italic)
{
// Use regular font.
if (FontFactory.TryGetFontSourceByTypefaceKey(XGlyphTypeface.ComputeKey(font.Name, false, false), out fontSource))
{
FontFactory.CacheExistingFontSourceWithNewTypefaceKey(typefaceKey, fontSource);
}
}
else
{
if (FontFactory.TryGetFontSourceByTypefaceKey(XGlyphTypeface.ComputeKey(font.Name, false, false), out fontSource))
{
// Should never come here...
FontFactory.CacheExistingFontSourceWithNewTypefaceKey(typefaceKey, fontSource);
}
}
}
#endif
}
else
{
// Get or create the font source and cache it under the specified typeface key.
fontSource = XFontSource.GetOrCreateFromGdi(typefaceKey, font);
}
return(fontSource);
}