private void UpdateGlyphInfo(string text, GlyphTypeface glyphTypeface, float fontSize)
{
var glyphs = new ushort[text.Length];
var advances = new float[text.Length];
var scale = fontSize / glyphTypeface.DesignEmHeight;
var width = 0f;
var characters = text.AsSpan();
for (int i = 0; i < characters.Length; i++)
{
var c = characters[i];
float advance;
ushort glyph;
switch (c)
{
case (char)0:
{
glyph = glyphTypeface.GetGlyph(0x200B);
advance = 0;
break;
}
case '\t':
{
glyph = glyphTypeface.GetGlyph(' ');
advance = glyphTypeface.GetGlyphAdvance(glyph) * scale * 4;
break;
}
default:
{
glyph = glyphTypeface.GetGlyph(c);
advance = glyphTypeface.GetGlyphAdvance(glyph) * scale;
break;
}
}
glyphs[i] = glyph;
advances[i] = advance;
width += advance;
}
_glyphs = new ReadOnlySlice <ushort>(glyphs);
_advances = new ReadOnlySlice <float>(advances);
}
public override void Render(DrawingContext context)
{
var c = (char)_rand.Next(65, 90);
if (_fontSize + _direction > 200)
{
_direction = -10;
}
if (_fontSize + _direction < 20)
{
_direction = 10;
}
_fontSize += _direction;
_glyphIndices[0] = _glyphTypeface.GetGlyph(c);
_characters[0] = c;
var glyphRun = new GlyphRun(_glyphTypeface, _fontSize, _characters, _glyphIndices);
var geometry = glyphRun.BuildGeometry();
context.DrawGeometry(Brushes.Green, null, geometry);
}
public FpsCounter(GlyphTypeface typeface)
{
for (var c = FirstChar; c <= LastChar; c++)
{
var s = new string((char)c, 1);
var glyph = typeface.GetGlyph((uint)(s[0]));
_runs[c - FirstChar] = new GlyphRun(typeface, 18, new ReadOnlySlice <char>(s.AsMemory()), new ushort[] { glyph });
}
}
private void UpdateGlyphRun()
{
var c = (char)_rand.Next(65, 90);
if (_fontSize + _direction > 200)
{
_direction = -10;
}
if (_fontSize + _direction < 20)
{
_direction = 10;
}
_fontSize += _direction;
_glyphIndices[0] = _glyphTypeface.GetGlyph(c);
_characters[0] = c;
var scale = (double)_fontSize / _glyphTypeface.DesignEmHeight;
var drawingGroup = new DrawingGroup();
var glyphRunDrawing = new GlyphRunDrawing
{
Foreground = Brushes.Black,
GlyphRun = new GlyphRun(_glyphTypeface, _fontSize, _characters, _glyphIndices)
};
drawingGroup.Children.Add(glyphRunDrawing);
var geometryDrawing = new GeometryDrawing
{
Pen = new Pen(Brushes.Black),
Geometry = new RectangleGeometry {
Rect = new Rect(glyphRunDrawing.GlyphRun.Size)
}
};
drawingGroup.Children.Add(geometryDrawing);
(_imageControl.Source as DrawingImage).Drawing = drawingGroup;
}
public ShapedBuffer ShapeText(ReadOnlySlice <char> text, GlyphTypeface typeface, double fontRenderingEmSize,
CultureInfo culture, sbyte bidiLevel)
{
var shapedBuffer = new ShapedBuffer(text, text.Length, typeface, fontRenderingEmSize, bidiLevel);
for (var i = 0; i < shapedBuffer.Length;)
{
var glyphCluster = i + text.Start;
var codepoint = Codepoint.ReadAt(text, i, out var count);
var glyphIndex = typeface.GetGlyph(codepoint);
shapedBuffer[i] = new GlyphInfo(glyphIndex, glyphCluster, 10);
i += count;
}
return(shapedBuffer);
}
private void UpdateGlyphRun()
{
var c = (uint)_rand.Next(65, 90);
if (_fontSize + _direction > 200)
{
_direction = -10;
}
if (_fontSize + _direction < 20)
{
_direction = 10;
}
_fontSize += _direction;
_glyphIndices[0] = _glyphTypeface.GetGlyph(c);
var scale = (double)_fontSize / _glyphTypeface.DesignEmHeight;
var drawingGroup = new DrawingGroup();
var glyphRunDrawing = new GlyphRunDrawing
{
Foreground = Brushes.Black,
GlyphRun = new GlyphRun(_glyphTypeface, _fontSize, _glyphIndices),
BaselineOrigin = new Point(0, -_glyphTypeface.Ascent * scale)
};
drawingGroup.Children.Add(glyphRunDrawing);
var geometryDrawing = new GeometryDrawing
{
Pen = new Pen(Brushes.Black),
Geometry = new RectangleGeometry {
Rect = glyphRunDrawing.GlyphRun.Bounds
}
};
drawingGroup.Children.Add(geometryDrawing);
_drawingPresenter.Drawing = drawingGroup;
}
double MeasureGlyphAt(int index)
{
return(_typeFace.GetGlyphAdvance(
_typeFace.GetGlyph(_range[index])) * _scale);
}