/// <summary>
/// Initializes a new instance of the <see cref="GlyphRun"/> class by specifying properties of the class.
/// </summary>
/// <param name="glyphTypeface">The glyph typeface.</param>
/// <param name="fontRenderingEmSize">The rendering em size.</param>
/// <param name="glyphIndices">The glyph indices.</param>
/// <param name="glyphAdvances">The glyph advances.</param>
/// <param name="glyphOffsets">The glyph offsets.</param>
/// <param name="characters">The characters.</param>
/// <param name="glyphClusters">The glyph clusters.</param>
/// <param name="biDiLevel">The bidi level.</param>
public GlyphRun(
GlyphTypeface glyphTypeface,
double fontRenderingEmSize,
ReadOnlySlice <char> characters,
IReadOnlyList <ushort> glyphIndices,
IReadOnlyList <double>?glyphAdvances = null,
IReadOnlyList <Vector>?glyphOffsets = null,
IReadOnlyList <int>?glyphClusters = null,
int biDiLevel = 0)
{
_glyphTypeface = glyphTypeface;
FontRenderingEmSize = fontRenderingEmSize;
Characters = characters;
_glyphIndices = glyphIndices;
GlyphAdvances = glyphAdvances;
GlyphOffsets = glyphOffsets;
GlyphClusters = glyphClusters;
BiDiLevel = biDiLevel;
}
/// <summary>
/// Initializes a new instance of the <see cref="GlyphRun"/> class by specifying properties of the class.
/// </summary>
/// <param name="glyphTypeface">The glyph typeface.</param>
/// <param name="fontRenderingEmSize">The rendering em size.</param>
/// <param name="glyphIndices">The glyph indices.</param>
/// <param name="glyphAdvances">The glyph advances.</param>
/// <param name="glyphOffsets">The glyph offsets.</param>
/// <param name="characters">The characters.</param>
/// <param name="glyphClusters">The glyph clusters.</param>
/// <param name="biDiLevel">The bidi level.</param>
public GlyphRun(
GlyphTypeface glyphTypeface,
double fontRenderingEmSize,
ReadOnlySlice <ushort> glyphIndices,
ReadOnlySlice <double> glyphAdvances = default,
ReadOnlySlice <Vector> glyphOffsets = default,
ReadOnlySlice <char> characters = default,
ReadOnlySlice <ushort> glyphClusters = default,
int biDiLevel = 0)
{
GlyphTypeface = glyphTypeface;
FontRenderingEmSize = fontRenderingEmSize;
GlyphIndices = glyphIndices;
GlyphAdvances = glyphAdvances;
GlyphOffsets = glyphOffsets;
Characters = characters;
GlyphClusters = glyphClusters;
BiDiLevel = biDiLevel;
}
/// <summary>
/// Returns a new <see cref="GlyphTypeface"/>, or an existing one if a matching <see cref="GlyphTypeface"/> exists.
/// </summary>
/// <param name="typeface">The typeface.</param>
/// <returns>
/// The <see cref="GlyphTypeface"/>.
/// </returns>
public GlyphTypeface GetOrAddGlyphTypeface(Typeface typeface)
{
while (true)
{
if (_glyphTypefaceCache.TryGetValue(typeface, out var glyphTypeface))
{
return(glyphTypeface);
}
glyphTypeface = new GlyphTypeface(typeface);
if (_glyphTypefaceCache.TryAdd(typeface, glyphTypeface))
{
return(glyphTypeface);
}
if (typeface.FontFamily == _defaultFontFamily)
{
return(null);
}
typeface = new Typeface(_defaultFontFamily, typeface.Style, typeface.Weight);
}
}
/// <summary>
/// Returns a new <see cref="GlyphTypeface"/>, or an existing one if a matching <see cref="GlyphTypeface"/> exists.
/// </summary>
/// <param name="typeface">The typeface.</param>
/// <returns>
/// The <see cref="GlyphTypeface"/>.
/// </returns>
public GlyphTypeface GetOrAddGlyphTypeface(Typeface typeface)
{
while (true)
{
if (_glyphTypefaceCache.TryGetValue(typeface, out var glyphTypeface))
{
return(glyphTypeface);
}
glyphTypeface = new GlyphTypeface(typeface);
if (_glyphTypefaceCache.TryAdd(typeface, glyphTypeface))
{
return(glyphTypeface);
}
if (typeface.FontFamily == _defaultFontFamily)
{
throw new InvalidOperationException($"Could not create glyph typeface for: {typeface.FontFamily.Name}.");
}
typeface = new Typeface(_defaultFontFamily, typeface.Style, typeface.Weight);
}
}
