public PdfText(string value, PdfFont font, PdfMeasurement fontSize, PdfPoint location, PdfStreamState state = default(PdfStreamState))
{
Value = value;
Font = font;
FontSize = fontSize;
Location = location;
State = state;
}
private IEnumerable <PdfPathCommand> GetCommands(double theta, double startAngle)
{
if (theta <= 0.0)
{
yield break;
}
// from http://www.tinaja.com/glib/bezcirc2.pdf
var x0 = Math.Cos(theta * 0.5);
var y0 = -Math.Sin(theta * 0.5);
var x3 = x0;
var y3 = -y0;
var x1 = (4.0 - x0) / 3.0;
var y1 = ((1.0 - x0) * (3.0 - x0)) / (3.0 * y0);
var x2 = x1;
var y2 = -y1;
var p0 = new PdfPoint(PdfMeasurement.Points(x0), PdfMeasurement.Points(y0));
var p1 = new PdfPoint(PdfMeasurement.Points(x1), PdfMeasurement.Points(y1));
var p2 = new PdfPoint(PdfMeasurement.Points(x2), PdfMeasurement.Points(y2));
var p3 = new PdfPoint(PdfMeasurement.Points(x3), PdfMeasurement.Points(y3));
// now rotate points by (theta / 2) + startAngle
var rotTheta = theta * 0.5 + startAngle;
p0 = p0.RotateAboutOrigin(rotTheta);
p1 = p1.RotateAboutOrigin(rotTheta);
p2 = p2.RotateAboutOrigin(rotTheta);
p3 = p3.RotateAboutOrigin(rotTheta);
// multiply by the radius
p0 = new PdfPoint(p0.X * RadiusX, p0.Y * RadiusY);
p1 = new PdfPoint(p1.X * RadiusX, p1.Y * RadiusY);
p2 = new PdfPoint(p2.X * RadiusX, p2.Y * RadiusY);
p3 = new PdfPoint(p3.X * RadiusX, p3.Y * RadiusY);
// do final rotation
p0 = p0.RotateAboutOrigin(RotationAngle);
p1 = p1.RotateAboutOrigin(RotationAngle);
p2 = p2.RotateAboutOrigin(RotationAngle);
p3 = p3.RotateAboutOrigin(RotationAngle);
// offset for the center
p0 += Center;
p1 += Center;
p2 += Center;
p3 += Center;
yield return(new PdfPathMoveTo(p0));
yield return(new PdfCubicBezier(p1, p2, p3));
}
public PdfEllipse(PdfPoint center, PdfMeasurement radiusX, PdfMeasurement radiusY, double rotationAngle = 0.0, double startAngle = 0.0, double endAngle = Math.PI * 2.0, PdfStreamState state = default(PdfStreamState))
{
Center = center;
RadiusX = radiusX;
RadiusY = radiusY;
RotationAngle = rotationAngle;
StartAngle = startAngle;
EndAngle = endAngle;
State = state;
while (StartAngle < 0.0)
{
StartAngle += Math.PI * 2.0;
}
while (EndAngle < 0.0)
{
EndAngle += Math.PI * 2.0;
}
}
public static PdfPage NewASeries(int n, bool isPortrait = true)
{
var longSide = (int)(1000.0 / Math.Pow(2.0, (2.0 * n - 1.0) / 4.0) + 0.2);
var shortSide = (int)(longSide / Math.Sqrt(2.0));
switch (n)
{
case 0:
case 3:
case 6:
// manually correct rounding errors
shortSide++;
break;
}
var width = isPortrait ? shortSide : longSide;
var height = isPortrait ? longSide : shortSide;
return(new PdfPage(PdfMeasurement.Mm(width), PdfMeasurement.Mm(height)));
}
private void WriteStrokeWidth(PdfMeasurement strokeWidth)
{
WriteLine($"{strokeWidth.AsPoints().AsInvariant()} w");
}
public static PdfPage NewLetterLandscape()
{
return(new PdfPage(PdfMeasurement.Inches(LetterHeight), PdfMeasurement.Inches(LetterWidth)));
}
public PdfPage(PdfMeasurement width, PdfMeasurement height, params IPdfEncoder[] encoders)
{
Width = width;
Height = height;
Stream = new PdfStream(encoders);
}
public PdfPoint(PdfMeasurement x, PdfMeasurement y)
{
X = x;
Y = y;
}