public void DrawGlyphRun(
Vector2 position,
CanvasFontFace fontFace,
float fontSize,
CanvasGlyph[] glyphs,
bool isSideways,
uint bidiLevel,
object brush,
CanvasTextMeasuringMode measuringMode,
string locale,
string textString,
int[] clusterMapIndices,
uint startingTextPosition,
CanvasGlyphOrientation glyphOrientation)
{
if (glyphs == null || glyphs.Length == 0)
{
return;
}
float scaledFontAscent = fontFace.Ascent * fontSize;
float subscriptBaselineDropAmount = scaledFontAscent * subscriptBaselineScale;
float superscriptBaselineRaiseAmount = scaledFontAscent * superscriptBaselineScale;
// Draw glyph-by-glyph.
for (int i = 0; i < glyphs.Length; ++i)
{
CanvasGlyph[] singleGlyph = new CanvasGlyph[1];
singleGlyph[0] = glyphs[i];
Vector2 positionForThisGlyph = position;
CustomBrushData brushData = (CustomBrushData)brush;
if (brushData != null)
{
if (brushData.BaselineAdjustment == CustomBrushData.BaselineAdjustmentType.Lower)
{
positionForThisGlyph.Y += subscriptBaselineDropAmount;
}
else if (brushData.BaselineAdjustment == CustomBrushData.BaselineAdjustmentType.Raise)
{
positionForThisGlyph.Y -= superscriptBaselineRaiseAmount;
}
}
DrawingSession.DrawGlyphRun(
positionForThisGlyph,
fontFace,
fontSize,
singleGlyph,
isSideways,
bidiLevel,
TextBrush);
position.X += glyphs[i].Advance;
}
}
private void ShrinkFontAndAttachCustomBrushData(
CanvasTextLayout textLayout,
int textPosition,
int characterCount,
CustomBrushData.BaselineAdjustmentType baselineAdjustmentType)
{
textLayout.SetFontSize(textPosition, characterCount, (float)CurrentFontSize * fontSizeShrinkAmount);
textLayout.SetCustomBrush(textPosition, characterCount, new CustomBrushData() { BaselineAdjustment = baselineAdjustmentType });
}