public void ShouldRenderAFilledCubicBezierCurve()
{
// 76, 410, 93, 312, 119, 188, 193, 190,
// 193, 190, 267, 190, 292, 366, 311, 521,
var p0 = new Point(76, 410) * 0.4; // start point
var c0 = new Point(115, 190) * 0.4; // control point 0
var c1 = new Point(273, 190) * 0.4; // control point 1
var p1 = new Point(311, 521) * 0.4; // end point
var p = new Point((c0.X + c1.X) / 2, (c0.Y + c1.Y) / 2);
Application.Run(new Form1(), () => {
var d = new PathGeometryBuilder();
d.BeginPath();
d.MoveTo(p0);
d.QuadraticCurveTo(c0, p);
d.QuadraticCurveTo(c1, p1);
d.Fill();
var g = Form.current.ForegroundDrawingContext;
g.DrawGeometry(new Brush(Color.Black), null, d.ToGeometry());
g.DrawLine(new Pen(Color.Red, 2), p0, c0);
g.DrawLine(new Pen(Color.Green, 2), c0, c1);
g.DrawLine(new Pen(Color.Blue, 2), c1, p1);
g.DrawEllipse(new Brush(Color.Gold), null, p, 4, 4);
});
}
public void ShouldRenderAFilledCubicBezierCurve2()
{
// (625,1549) (1040,1508) (1444, 1168) (1442,794)
var p0 = new Point(625, 1549) * 0.4; // start point
var c0 = new Point(1040, 1508) * 0.4; // control point 0
var c1 = new Point(1444, 1168) * 0.4; // control point 1
var p1 = new Point(1442, 794) * 0.4; // end point
var p = new Point((c0.X + c1.X) / 2, (c0.Y + c1.Y) / 2);
Application.Run(new Form1(), () => {
var d = new PathGeometryBuilder();
d.BeginPath();
d.MoveTo(p0);
d.QuadraticCurveTo(c0, p);
d.QuadraticCurveTo(c1, p1);
d.Fill();
var g = Form.current.ForegroundDrawingContext;
g.DrawGeometry(new Brush(Color.Black), null, d.ToGeometry());
g.DrawLine(new Pen(Color.Red, 2), p0, c0);
g.DrawLine(new Pen(Color.Green, 2), c0, c1);
g.DrawLine(new Pen(Color.Blue, 2), c1, p1);
g.DrawEllipse(new Brush(Color.Gold), null, p, 4, 4);
});
}
public void ShowGlyphAsDirectedContours_Builtin()
{
//load the glyph
Typeface typeFace;
using (var fs = Utility.ReadFile(Utility.FontDir + fontFileName))
{
var reader = new OpenFontReader();
typeFace = reader.Read(fs);
}
Glyph glyph = typeFace.Lookup(character);
Bounds boundingBox = typeFace.Bounds;
short ascender = typeFace.Ascender;
//read polygons and quadratic bezier segments
GlyphLoader.Read(glyph, out var polygons, out var quadraticBezierSegments);
//The actual position of points should apply ascender offset
var offset = new Vector(0, ascender);
//polygons
Geometry polygonGeometry;
{
var d = new PathGeometryBuilder();
d.BeginPath();
foreach (var polygon in polygons)
{
var startPoint = polygon[0] + offset;
d.MoveTo(startPoint);
var previousPoint = startPoint;
foreach (var point in polygon.Skip(1))
{
var p = point + offset;
d.LineTo(p);
//DrawArrow(d, lastPoint, point);
previousPoint = p;
}
d.LineTo(startPoint);
//DrawArrow(d, lastPoint, point);
d.Stroke();
}
polygonGeometry = d.ToGeometry();
}
var polygonPen = new Pen(polygonColor, polygonLineWidth);
//quadratic bezier segments
Geometry quadraticGeometry;
{
var d = new PathGeometryBuilder();
d.BeginPath();
foreach (var qs in quadraticBezierSegments)
{
d.MoveTo(qs.Item1 + offset);
d.QuadraticCurveTo(qs.Item2 + offset, qs.Item3 + offset);
d.Stroke();
}
quadraticGeometry = d.ToGeometry();
}
var quadraticPen = new Pen(quadraticSegmentColor, quadraticLineWidth);
//start points
Geometry startPointGeometry;
{
var d = new PathGeometryBuilder();
for (var i = 0; i < polygons.Count; i++)
{
var polygon = polygons[i];
var startPoint = polygon[0] + offset;
d.Circle(startPoint, 10);
d.Fill();
}
startPointGeometry = d.ToGeometry();
}
var startPointBrush = new Brush(startPointColor);
//create a DrawingVisual to hold geometries
DrawingVisual drawingVisual = new DrawingVisual(0);
//create geometries and save to DrawingVisual's content
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawGeometry(null, polygonPen, polygonGeometry);
drawingContext.DrawGeometry(null, quadraticPen, quadraticGeometry);
drawingContext.DrawGeometry(startPointBrush, null, startPointGeometry);
drawingContext.Close();
//draw the drawingVisual to image
int width = boundingBox.XMax - boundingBox.XMin, height = boundingBox.YMax - boundingBox.YMin;
Util.DrawDrawingVisualToImage(out var imageBytes, width, height, drawingVisual);
//save and show the image
var path = $"{OutputDir}{Path.DirectorySeparatorChar}{nameof(ShowGlyphAsDirectedContours_Builtin)}_{fontFileName}_{character}.png";
Util.ShowRawPixelsFrom_glReadPixels_NotOpenFolder(imageBytes, width, height, path);
}