/// <summary>
/// Renders the glyph to the render surface in font units relative to a bottom left origin at (0,0)
/// </summary>
/// <param name="surface">The surface.</param>
/// <param name="pointSize">Size of the point.</param>
/// <param name="location">The location.</param>
/// <param name="dpi">The dpi.</param>
/// <exception cref="System.NotSupportedException">Too many control points</exception>
public void RenderTo(IGlyphRenderer surface, float pointSize, Vector2 location, Vector2 dpi)
{
location = location * dpi;
int pointIndex = 0;
var scaleFactor = (float)(this.sizeOfEm * 72f);
surface.BeginGlyph();
Vector2 firstPoint = Vector2.Zero;
Vector2 scale = new Vector2(1, -1);
for (int i = 0; i < this.endPoints.Length; i++)
{
int nextContour = this.endPoints[i] + 1;
bool isFirstPoint = true;
ControlPointCollection points = new ControlPointCollection();
bool justFromCurveMode = false;
for (; pointIndex < nextContour; ++pointIndex)
{
var point = location + (scale * ((this.controlPoints[pointIndex] * pointSize * dpi) / scaleFactor)); // scale each point as we go, w will now have the correct relative point size
if (this.onCurves[pointIndex])
{
// on curve
if (justFromCurveMode)
{
points = DrawPoints(surface, points, point);
}
else
{
if (isFirstPoint)
{
isFirstPoint = false;
firstPoint = point;
surface.MoveTo(firstPoint);
}
else
{
surface.LineTo(point);
}
}
}
else
{
switch (points.Count)
{
case 0:
points.Add(point);
break;
case 1:
// we already have prev second control point
// so auto calculate line to
// between 2 point
Vector2 mid = (points.SecondControlPoint + point) / 2;
surface.QuadraticBezierTo(
points.SecondControlPoint,
mid);
points.SecondControlPoint = point; //replace 2nd
break;
default:
throw new NotSupportedException("Too many control points");
}
}
justFromCurveMode = !this.onCurves[pointIndex];
}
// close figure
// if in curve mode
if (justFromCurveMode)
{
DrawPoints(surface, points, firstPoint);
}
surface.EndFigure();
}
surface.EndGlyph();
}
