protected override void OnRender(DrawingContext drawingContext)
{
var fontFamily = new FontFamily("微软雅黑");
var fontSize = 15;
var y = 0;
drawingContext.PushOpacity(0.3);
foreach (var typeface in fontFamily.GetTypefaces().Skip(1).Take(1))
{
double offset = 3;
var baseLine = fontFamily.GetBaseline(fontSize);
if (typeface.TryGetGlyphTypeface(out var glyphTypeface))
{
foreach (var c in Text)
{
if (glyphTypeface.CharacterToGlyphMap.TryGetValue(c, out var glyphIndex))
{
var width = glyphTypeface.AdvanceWidths[glyphIndex] * fontSize;
width = GlyphExtension.RefineValue(width);
#pragma warning disable 618 // 忽略调用废弃构造函数
var glyphRun = new GlyphRun(
#pragma warning restore 618
glyphTypeface,
0,
false,
fontSize,
new[] { glyphIndex },
new Point(offset, baseLine + y),
new[] { width },
DefaultGlyphOffsetArray,
new char[] { c },
null,
null,
null, DefaultXmlLanguage);
drawingContext.DrawLine(new Pen(Brushes.Black, 2), new Point(offset, y), new Point(offset + width, y));
drawingContext.DrawGlyphRun(Brushes.Coral, glyphRun);
var glyphSize = glyphRun.GetSize(fontFamily.LineSpacing);
drawingContext.DrawRectangle(null, new Pen(Brushes.Black, 2), new Rect(new Point(offset, y), glyphSize));
offset += width;
}
}
}
y += fontSize;
}
drawingContext.Pop();
}