public GlyphTypefaceImpl(Typeface typeface)
{
DWFont = Direct2D1FontCollectionCache.GetFont(typeface);
FontFace = new FontFace(DWFont).QueryInterface <FontFace1>();
Face = new Face(GetTable);
Font = new HarfBuzzSharp.Font(Face);
Font.SetFunctionsOpenType();
Font.GetScale(out var xScale, out _);
DesignEmHeight = (short)xScale;
if (!Font.TryGetHorizontalFontExtents(out var fontExtents))
{
Font.TryGetVerticalFontExtents(out fontExtents);
}
Ascent = -fontExtents.Ascender;
Descent = -fontExtents.Descender;
LineGap = fontExtents.LineGap;
if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.UnderlineOffset, out var underlinePosition))
{
UnderlinePosition = underlinePosition;
}
if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.UnderlineSize, out var underlineThickness))
{
UnderlineThickness = underlineThickness;
}
if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.StrikeoutOffset, out var strikethroughPosition))
{
StrikethroughPosition = strikethroughPosition;
}
if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.StrikeoutSize, out var strikethroughThickness))
{
StrikethroughThickness = strikethroughThickness;
}
IsFixedPitch = FontFace.IsMonospacedFont;
}
public FormattedTextImpl(
string text,
Typeface typeface,
double fontSize,
TextAlignment textAlignment,
TextWrapping wrapping,
Size constraint,
IReadOnlyList <FormattedTextStyleSpan> spans)
{
Text = text;
using (var font = Direct2D1FontCollectionCache.GetFont(typeface))
using (var textFormat = new DWrite.TextFormat(Direct2D1Platform.DirectWriteFactory,
typeface.FontFamily.Name, font.FontFamily.FontCollection, (DWrite.FontWeight)typeface.Weight,
(DWrite.FontStyle)typeface.Style, DWrite.FontStretch.Normal, (float)fontSize))
{
textFormat.WordWrapping =
wrapping == TextWrapping.Wrap ? DWrite.WordWrapping.Wrap : DWrite.WordWrapping.NoWrap;
TextLayout = new DWrite.TextLayout(
Direct2D1Platform.DirectWriteFactory,
Text ?? string.Empty,
textFormat,
(float)constraint.Width,
(float)constraint.Height)
{
TextAlignment = textAlignment.ToDirect2D()
};
}
if (spans != null)
{
foreach (var span in spans)
{
ApplySpan(span);
}
}
Bounds = Measure();
}
public FormattedTextImpl(
string text,
Typeface typeface,
TextAlignment textAlignment,
TextWrapping wrapping,
Size constraint,
IReadOnlyList <FormattedTextStyleSpan> spans)
{
Text = text;
var factory = AvaloniaLocator.Current.GetService <DWrite.Factory>();
var textFormat = Direct2D1FontCollectionCache.GetTextFormat(typeface);
textFormat.WordWrapping =
wrapping == TextWrapping.Wrap ? DWrite.WordWrapping.Wrap : DWrite.WordWrapping.NoWrap;
TextLayout = new DWrite.TextLayout(
factory,
Text ?? string.Empty,
textFormat,
(float)constraint.Width,
(float)constraint.Height)
{
TextAlignment = textAlignment.ToDirect2D()
};
textFormat.Dispose();
if (spans != null)
{
foreach (var span in spans)
{
ApplySpan(span);
}
}
Size = Measure();
}
