diff --git a/src/Skia/Avalonia.Skia/GlyphTypefaceImpl.cs b/src/Skia/Avalonia.Skia/GlyphTypefaceImpl.cs index 5571bd890d..ceccc481f9 100644 --- a/src/Skia/Avalonia.Skia/GlyphTypefaceImpl.cs +++ b/src/Skia/Avalonia.Skia/GlyphTypefaceImpl.cs @@ -1,6 +1,5 @@ using System; using System.Runtime.InteropServices; -using Avalonia.Media; using Avalonia.Platform; using HarfBuzzSharp; using SkiaSharp; @@ -24,40 +23,33 @@ namespace Avalonia.Skia Font.SetFunctionsOpenType(); - Font.GetScale(out var xScale, out _); + DesignEmHeight = (short)Typeface.UnitsPerEm; - DesignEmHeight = (short)xScale; + var metrics = Typeface.ToFont().Metrics; - if (!Font.TryGetHorizontalFontExtents(out var fontExtents)) - { - Font.TryGetVerticalFontExtents(out fontExtents); - } + const double defaultFontRenderingEmSize = 12.0; - Ascent = -fontExtents.Ascender; + Ascent = (int)(metrics.Ascent / defaultFontRenderingEmSize * Typeface.UnitsPerEm); - Descent = -fontExtents.Descender; + Descent = (int)(metrics.Descent / defaultFontRenderingEmSize * Typeface.UnitsPerEm); - LineGap = fontExtents.LineGap; + LineGap = (int)(metrics.Leading / defaultFontRenderingEmSize * Typeface.UnitsPerEm); - if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.UnderlineOffset, out var underlinePosition)) - { - UnderlinePosition = underlinePosition; - } + UnderlinePosition = metrics.UnderlinePosition != null ? + (int)(metrics.UnderlinePosition / defaultFontRenderingEmSize * Typeface.UnitsPerEm) : + 0; - if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.UnderlineSize, out var underlineThickness)) - { - UnderlineThickness = underlineThickness; - } + UnderlineThickness = metrics.UnderlineThickness != null ? + (int)(metrics.UnderlineThickness / defaultFontRenderingEmSize * Typeface.UnitsPerEm) : + 0; - if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.StrikeoutOffset, out var strikethroughPosition)) - { - StrikethroughPosition = strikethroughPosition; - } + StrikethroughPosition = metrics.StrikeoutPosition != null ? + (int)(metrics.StrikeoutPosition / defaultFontRenderingEmSize * Typeface.UnitsPerEm) : + 0; - if (Font.OpenTypeMetrics.TryGetPosition(OpenTypeMetricsTag.StrikeoutSize, out var strikethroughThickness)) - { - StrikethroughThickness = strikethroughThickness; - } + StrikethroughThickness = metrics.StrikeoutThickness != null ? + (int)(metrics.StrikeoutThickness / defaultFontRenderingEmSize * Typeface.UnitsPerEm) : + 0; IsFixedPitch = Typeface.IsFixedPitch; }