public SKTypeface GetTypeFace(Typeface typeface)
{
var styleSlant = SKFontStyleSlant.Upright;
switch (typeface.Style)
{
case FontStyle.Italic:
styleSlant = SKFontStyleSlant.Italic;
break;
case FontStyle.Oblique:
styleSlant = SKFontStyleSlant.Oblique;
break;
}
if (!_fontFamilies.TryGetValue(typeface.FontFamily.Name, out var fontFamily))
{
return(TypefaceCache.GetTypeface(TypefaceCache.DefaultFamilyName, typeface.Style, typeface.Weight));
}
var weight = (SKFontStyleWeight)typeface.Weight;
var key = new FontKey(weight, styleSlant);
return(fontFamily.GetOrAdd(key, GetFallback(fontFamily, key)));
}
public static TypefaceCollectionEntry Get(FontFamily fontFamily, FontWeight fontWeight, FontStyle fontStyle)
{
if (fontFamily.Key != null)
{
return(SKTypefaceCollectionCache.GetOrAddTypefaceCollection(fontFamily)
.Get(fontFamily.Name, fontWeight, fontStyle));
}
var typefaceCollection = s_cache.GetOrAdd(fontFamily.Name, new ConcurrentDictionary <FontKey, TypefaceCollectionEntry>());
var key = new FontKey(fontWeight, fontStyle);
if (typefaceCollection.TryGetValue(key, out var entry))
{
return(entry);
}
var skTypeface = SKTypeface.FromFamilyName(fontFamily.Name, (SKFontStyleWeight)fontWeight,
SKFontStyleWidth.Normal, (SKFontStyleSlant)fontStyle) ?? SKTypeface.Default;
var typeface = new Typeface(fontFamily.Name, fontWeight, fontStyle);
entry = new TypefaceCollectionEntry(typeface, skTypeface);
typefaceCollection[key] = entry;
return(entry);
}
unsafe static SKTypeface GetTypeface(string name, FontKey key)
{
if (name == null)
{
name = "Arial";
}
Dictionary <FontKey, SKTypeface> entry;
if (!Cache.TryGetValue(name, out entry))
{
Cache[name] = entry = new Dictionary <FontKey, SKTypeface>();
}
SKTypeface typeface = null;
if (!entry.TryGetValue(key, out typeface))
{
typeface = SKTypeface.FromFamilyName(name, key.Weight, SKFontStyleWidth.Normal, key.Slant);
if (typeface == null)
{
typeface = SKTypeface.FromFamilyName(null, SKTypefaceStyle.Normal);
}
entry[key] = typeface;
}
return(typeface);
}
public TypefaceCollectionEntry Get(string familyName, FontWeight fontWeight, FontStyle fontStyle)
{
var key = new FontKey(fontWeight, fontStyle);
return(_fontFamilies.TryGetValue(familyName, out var fontFamily) ?
fontFamily.GetOrAdd(key, GetFallback(fontFamily, key)) :
new TypefaceCollectionEntry(Typeface.Default, SkiaSharp.SKTypeface.Default));
}
public void AddEntry(string familyName, FontKey key, TypefaceCollectionEntry entry)
{
if (!_fontFamilies.TryGetValue(familyName, out var fontFamily))
{
fontFamily = new ConcurrentDictionary <FontKey, TypefaceCollectionEntry>();
_fontFamilies.TryAdd(familyName, fontFamily);
}
fontFamily.TryAdd(key, entry);
}
public void AddTypeFace(SKTypeface typeface)
{
var key = new FontKey((SKFontStyleWeight)typeface.FontWeight, typeface.FontSlant);
if (!_fontFamilies.TryGetValue(typeface.FamilyName, out var fontFamily))
{
fontFamily = new ConcurrentDictionary <FontKey, SKTypeface>();
_fontFamilies.TryAdd(typeface.FamilyName, fontFamily);
}
fontFamily.TryAdd(key, typeface);
}
public bool TryMatchCharacter(int codepoint, FontWeight fontWeight, FontStyle fontStyle,
FontFamily fontFamily, CultureInfo culture, out FontKey fontKey)
{
if (culture == null)
{
culture = CultureInfo.CurrentUICulture;
}
if (t_languageTagBuffer == null)
{
t_languageTagBuffer = new string[2];
}
t_languageTagBuffer[0] = culture.TwoLetterISOLanguageName;
t_languageTagBuffer[1] = culture.ThreeLetterISOLanguageName;
if (fontFamily != null)
{
foreach (var familyName in fontFamily.FamilyNames)
{
var skTypeface = _skFontManager.MatchCharacter(familyName, (SKFontStyleWeight)fontWeight,
SKFontStyleWidth.Normal, (SKFontStyleSlant)fontStyle, t_languageTagBuffer, codepoint);
if (skTypeface == null)
{
continue;
}
fontKey = new FontKey(new FontFamily(familyName), fontWeight, fontStyle);
return(true);
}
}
else
{
var skTypeface = _skFontManager.MatchCharacter(null, (SKFontStyleWeight)fontWeight,
SKFontStyleWidth.Normal, (SKFontStyleSlant)fontStyle, t_languageTagBuffer, codepoint);
if (skTypeface != null)
{
fontKey = new FontKey(new FontFamily(skTypeface.FamilyName), fontWeight, fontStyle);
return(true);
}
}
fontKey = default;
return(false);
}
private static SKTypeface GetTypeface(string name, FontKey key)
{
var familyKey = name;
if (!s_cache.TryGetValue(familyKey, out var entry))
{
s_cache[familyKey] = entry = new Dictionary <FontKey, SKTypeface>();
}
if (!entry.TryGetValue(key, out var typeface))
{
typeface = SKTypeface.FromFamilyName(familyKey, key.Weight, SKFontStyleWidth.Normal, key.Slant) ??
GetTypeface(DefaultFamilyName, key);
entry[key] = typeface;
}
return(typeface);
}
public SKTypeface GetTypeFace(Typeface typeface)
{
SKFontStyleSlant skStyle = SKFontStyleSlant.Upright;
switch (typeface.Style)
{
case FontStyle.Italic:
skStyle = SKFontStyleSlant.Italic;
break;
case FontStyle.Oblique:
skStyle = SKFontStyleSlant.Oblique;
break;
}
var key = new FontKey(typeface.FontFamily.Name, (SKFontStyleWeight)typeface.Weight, skStyle);
return(_cachedTypefaces.TryGetValue(key, out var skTypeface) ? skTypeface : TypefaceCache.Default);
}
/// <summary>
/// Creates the custom font collection.
/// </summary>
/// <param name="fontFamily">The font family.</param>
/// <returns></returns>
private static SKTypefaceCollection CreateCustomFontCollection(FontFamily fontFamily)
{
var fontAssets = FontFamilyLoader.LoadFontAssets(fontFamily.Key);
var typeFaceCollection = new SKTypefaceCollection();
var assetLoader = AvaloniaLocator.Current.GetService <IAssetLoader>();
foreach (var asset in fontAssets)
{
var assetStream = assetLoader.Open(asset);
var typeface = SKTypeface.FromStream(assetStream);
var key = new FontKey(fontFamily, (FontWeight)typeface.FontWeight, (FontStyle)typeface.FontSlant);
typeFaceCollection.AddTypeface(key, typeface);
}
return(typeFaceCollection);
}
/// <summary>
/// Creates the custom font collection.
/// </summary>
/// <param name="fontFamily">The font family.</param>
/// <returns></returns>
private static SKTypefaceCollection CreateCustomFontCollection(FontFamily fontFamily)
{
var fontAssets = FontFamilyLoader.LoadFontAssets(fontFamily.Key);
var typeFaceCollection = new SKTypefaceCollection();
var assetLoader = AvaloniaLocator.Current.GetService <IAssetLoader>();
foreach (var asset in fontAssets)
{
var assetStream = assetLoader.Open(asset);
if (assetStream == null)
{
throw new InvalidOperationException("Asset could not be loaded.");
}
var typeface = SKTypeface.FromStream(assetStream);
if (typeface == null)
{
throw new InvalidOperationException("Typeface could not be loaded.");
}
if (typeface.FamilyName != fontFamily.Name)
{
continue;
}
var key = new FontKey(fontFamily.Name, typeface.FontSlant.ToAvalonia(),
(FontWeight)typeface.FontWeight);
typeFaceCollection.AddTypeface(key, typeface);
}
return(typeFaceCollection);
}
private bool Equals(FontKey other)
{
return(Name == other.Name && Slant == other.Slant &&
Weight == other.Weight);
}
public bool Equals(FontKey other)
{
return(Slant == other.Slant &&
Weight == other.Weight);
}
private static SKTypeface GetNearestMatch(IDictionary <FontKey, SKTypeface> typefaces, FontKey key)
{
if (typefaces.TryGetValue(new FontKey(key.FamilyName, key.Style, key.Weight), out var typeface))
{
return(typeface);
}
var weight = (int)key.Weight;
weight -= weight % 100; // make sure we start at a full weight
for (var i = (int)key.Style; i < 2; i++)
{
// only try 2 font weights in each direction
for (var j = 0; j < 200; j += 100)
{
if (weight - j >= 100)
{
if (typefaces.TryGetValue(new FontKey(key.FamilyName, (FontStyle)i, (FontWeight)(weight - j)), out typeface))
{
return(typeface);
}
}
if (weight + j > 900)
{
continue;
}
if (typefaces.TryGetValue(new FontKey(key.FamilyName, (FontStyle)i, (FontWeight)(weight + j)), out typeface))
{
return(typeface);
}
}
}
//Nothing was found so we use the first typeface we can get.
return(typefaces.Values.FirstOrDefault());
}
public SKTypeface Get(Typeface typeface)
{
var key = new FontKey(typeface.FontFamily.Name, typeface.Style, typeface.Weight);
return(GetNearestMatch(_typefaces, key));
}
public void AddTypeface(FontKey key, SKTypeface typeface)
{
_typefaces.TryAdd(key, typeface);
}
private static SKTypeface GetNearestMatch(IDictionary <FontKey, SKTypeface> typefaces, FontKey key)
{
if (typefaces.ContainsKey(key))
{
return(typefaces[key]);
}
var keys = typefaces.Keys.Where(
x => ((int)x.Weight <= (int)key.Weight || (int)x.Weight > (int)key.Weight) && x.Style == key.Style).ToArray();
if (!keys.Any())
{
keys = typefaces.Keys.Where(
x => x.Weight == key.Weight && (x.Style >= key.Style || x.Style < key.Style)).ToArray();
if (!keys.Any())
{
keys = typefaces.Keys.Where(
x => ((int)x.Weight <= (int)key.Weight || (int)x.Weight > (int)key.Weight) &&
(x.Style >= key.Style || x.Style < key.Style)).ToArray();
}
}
if (keys.Length == 0)
{
return(SKTypeface.Default);
}
key = keys[0];
return(typefaces[key]);
}
public SKTypeface Get(FontFamily fontFamily, FontWeight fontWeight, FontStyle fontStyle)
{
var key = new FontKey(fontFamily, fontWeight, fontStyle);
return(GetNearestMatch(_typefaces, key));
}
private static SKTypeface GetFallback(IDictionary <FontKey, SKTypeface> fontFamily, FontKey key)
{
var keys = fontFamily.Keys.Where(
x => ((int)x.Weight <= (int)key.Weight || (int)x.Weight > (int)key.Weight) && x.Slant == key.Slant).ToArray();
if (!keys.Any())
{
keys = fontFamily.Keys.Where(
x => x.Weight == key.Weight && (x.Slant >= key.Slant || x.Slant < key.Slant)).ToArray();
if (!keys.Any())
{
keys = fontFamily.Keys.Where(
x => ((int)x.Weight <= (int)key.Weight || (int)x.Weight > (int)key.Weight) &&
(x.Slant >= key.Slant || x.Slant < key.Slant)).ToArray();
}
}
key = keys.FirstOrDefault();
fontFamily.TryGetValue(key, out var typeface);
return(typeface);
}
private static TypefaceCollectionEntry GetFallback(IDictionary <FontKey, TypefaceCollectionEntry> fontFamily, FontKey key)
{
var keys = fontFamily.Keys.Where(
x => ((int)x.Weight <= (int)key.Weight || (int)x.Weight > (int)key.Weight) && x.Style == key.Style).ToArray();
if (!keys.Any())
{
keys = fontFamily.Keys.Where(
x => x.Weight == key.Weight && (x.Style >= key.Style || x.Style < key.Style)).ToArray();
if (!keys.Any())
{
keys = fontFamily.Keys.Where(
x => ((int)x.Weight <= (int)key.Weight || (int)x.Weight > (int)key.Weight) &&
(x.Style >= key.Style || x.Style < key.Style)).ToArray();
}
}
key = keys.FirstOrDefault();
fontFamily.TryGetValue(key, out var entry);
return(entry);
}
public bool TryMatchCharacter(int codepoint, FontStyle fontStyle,
FontWeight fontWeight,
FontFamily fontFamily, CultureInfo culture, out FontKey fontKey)
{
SKFontStyle skFontStyle;
switch (fontWeight)
{
case FontWeight.Normal when fontStyle == FontStyle.Normal:
skFontStyle = SKFontStyle.Normal;
break;
case FontWeight.Normal when fontStyle == FontStyle.Italic:
skFontStyle = SKFontStyle.Italic;
break;
case FontWeight.Bold when fontStyle == FontStyle.Normal:
skFontStyle = SKFontStyle.Bold;
break;
case FontWeight.Bold when fontStyle == FontStyle.Italic:
skFontStyle = SKFontStyle.BoldItalic;
break;
default:
skFontStyle = new SKFontStyle((SKFontStyleWeight)fontWeight, SKFontStyleWidth.Normal, (SKFontStyleSlant)fontStyle);
break;
}
if (culture == null)
{
culture = CultureInfo.CurrentUICulture;
}
if (t_languageTagBuffer == null)
{
t_languageTagBuffer = new string[2];
}
t_languageTagBuffer[0] = culture.TwoLetterISOLanguageName;
t_languageTagBuffer[1] = culture.ThreeLetterISOLanguageName;
if (fontFamily != null && fontFamily.FamilyNames.HasFallbacks)
{
var familyNames = fontFamily.FamilyNames;
for (var i = 1; i < familyNames.Count; i++)
{
var skTypeface =
_skFontManager.MatchCharacter(familyNames[i], skFontStyle, t_languageTagBuffer, codepoint);
if (skTypeface == null)
{
continue;
}
fontKey = new FontKey(skTypeface.FamilyName, fontStyle, fontWeight);
return(true);
}
}
else
{
var skTypeface = _skFontManager.MatchCharacter(null, skFontStyle, t_languageTagBuffer, codepoint);
if (skTypeface != null)
{
fontKey = new FontKey(skTypeface.FamilyName, fontStyle, fontWeight);
return(true);
}
}
fontKey = default;
return(false);
}
public void AddTypeFace(SKTypeface typeface)
{
var key = new FontKey(typeface.FamilyName, (SKFontStyleWeight)typeface.FontWeight, typeface.FontSlant);
_cachedTypefaces.TryAdd(key, typeface);
}