public void EndGlyph()
{
GlyphRenderData renderData = default;
// has the glyoh been rendedered already????
if (this.raterizationRequired)
{
IPath path = this.builder.Build();
if (this.renderFill)
{
renderData.FillMap = this.Render(path);
}
if (this.renderOutline)
{
if (this.Pen.StrokePattern.Length == 0)
{
path = path.GenerateOutline(this.Pen.StrokeWidth);
}
else
{
path = path.GenerateOutline(this.Pen.StrokeWidth, this.Pen.StrokePattern);
}
renderData.OutlineMap = this.Render(path);
}
this.glyphData[this.currentGlyphRenderParams] = renderData;
}
else
{
renderData = this.glyphData[this.currentGlyphRenderParams];
}
if (this.renderFill)
{
this.FillOperations.Add(new DrawingOperation
{
Location = this.currentRenderPosition,
Map = renderData.FillMap
});
}
if (this.renderOutline)
{
this.OutlineOperations.Add(new DrawingOperation
{
Location = this.currentRenderPosition,
Map = renderData.OutlineMap
});
}
}
private void RenderShapeToCanvas(SvgGraphicsElement svgGraphicsElement, IPath path)
{
var matrix = CalulateUpdatedMatrix(svgGraphicsElement);
var brush = svgGraphicsElement.CreateFillPaintServer()?.Accept(BrushGenerator <TPixel> .Instance);
IBrush strokFill = null;
IPath outline = null;
if (svgGraphicsElement.StrokeWidth > 0)
{
strokFill = svgGraphicsElement.CreateStrokePaintServer()?.Accept(BrushGenerator <TPixel> .Instance);
if (strokFill != null)
{
var pattern = svgGraphicsElement.Style.StrokeDashArray.Value?.Select(X => X.Value).ToArray();
var joint = svgGraphicsElement.Style.StrokeLineJoin.AsJointStyle();
var end = svgGraphicsElement.Style.StrokeLineCap.AsEndCapStyle();
if (pattern == null || pattern.Length == 0)
{
outline = path.GenerateOutline(svgGraphicsElement.StrokeWidth, joint, end);
}
else
{
outline = path.GenerateOutline(svgGraphicsElement.StrokeWidth,
pattern,
false,
joint, end);
}
}
}
var shapeOptions = new ShapeOptions {
IntersectionRule = IntersectionRule.Nonzero
};
var shapeGraphicsOptions = new DrawingOptions()
{
ShapeOptions = shapeOptions
};
if (brush != null)
{
image.Fill(shapeGraphicsOptions, brush, path.Transform(matrix));
}
if (outline != null && strokFill != null)
{
image.Fill(shapeGraphicsOptions, strokFill, outline.Transform(matrix));
}
}
public void ClippedTriangleGapInIntersections()
{
Polygon simplePath = new Polygon(new LinearLineSegment(
new PointF(10, 10),
new PointF(200, 150),
new PointF(50, 300)));
Polygon hole1 = new Polygon(new LinearLineSegment(
new PointF(37, 85),
new PointF(93, 85),
new PointF(65, 137)));
IPath clippedPath = simplePath.Clip(hole1);
IPath outline = clippedPath.GenerateOutline(5, new[] { 1f });
PointF[] buffer = new PointF[20];
PointF start = new PointF(outline.Bounds.Left - 1, 102);
PointF end = new PointF(outline.Bounds.Right + 1, 102);
int matches = outline.FindIntersections(start, end, buffer, 0);
int maxIndex = buffer.Select((x, i) => new { x, i }).Where(x => x.x.X > 0).Select(x => x.i).Last();
Assert.Equal(matches - 1, maxIndex);
}
public void ClippedTriangle()
{
var simplePath = new Polygon(new LinearLineSegment(
new PointF(10, 10),
new PointF(200, 150),
new PointF(50, 300)));
var hole1 = new Polygon(new LinearLineSegment(
new PointF(37, 85),
new PointF(93, 85),
new PointF(65, 137)));
IPath clippedPath = simplePath.Clip(hole1);
IPath outline = clippedPath.GenerateOutline(5, new[] { 1f });
Assert.False(outline.Contains(new PointF(74, 97)));
}
/// <summary>
/// Generates a outline of the path with alternating on and off segments based on the pattern.
/// </summary>
/// <param name="path">the path to outline</param>
/// <param name="width">The final width outline</param>
/// <param name="pattern">The pattern made of multiples of the width.</param>
/// <param name="startOff">Weather the first item in the pattern is on or off.</param>
/// <returns>A new path representing the outline.</returns>
public static IPath GenerateOutline(this IPath path, float width, float[] pattern, bool startOff)
{
if (pattern == null || pattern.Length < 2)
{
return(path.GenerateOutline(width));
}
IEnumerable <ISimplePath> paths = path.Flatten();
ClipperOffset offset = new ClipperOffset();
List <IntPoint> buffer = new List <IntPoint>(3);
foreach (ISimplePath p in paths)
{
bool online = !startOff;
float targetLength = pattern[0] * width;
int patternPos = 0;
// Create a new list of points representing the new outline
int pCount = p.Points.Count;
if (!p.IsClosed)
{
pCount--;
}
int i = 0;
Vector2 currentPoint = p.Points[0];
while (i < pCount)
{
int next = (i + 1) % p.Points.Count;
Vector2 targetPoint = p.Points[next];
float distToNext = Vector2.Distance(currentPoint, targetPoint);
if (distToNext > targetLength)
{
// find a point between the 2
float t = targetLength / distToNext;
Vector2 point = (currentPoint * (1 - t)) + (targetPoint * t);
buffer.Add(currentPoint.ToPoint());
buffer.Add(point.ToPoint());
// we now inset a line joining
if (online)
{
offset.AddPath(buffer, JoinType.jtSquare, EndType.etOpenButt);
}
online = !online;
buffer.Clear();
currentPoint = point;
// next length
patternPos = (patternPos + 1) % pattern.Length;
targetLength = pattern[patternPos] * width;
}
else if (distToNext <= targetLength)
{
buffer.Add(currentPoint.ToPoint());
currentPoint = targetPoint;
i++;
targetLength -= distToNext;
}
}
if (buffer.Count > 0)
{
if (p.IsClosed)
{
buffer.Add(p.Points.First().ToPoint());
}
else
{
buffer.Add(p.Points.Last().ToPoint());
}
if (online)
{
offset.AddPath(buffer, JoinType.jtSquare, EndType.etOpenButt);
}
online = !online;
buffer.Clear();
patternPos = (patternPos + 1) % pattern.Length;
targetLength = pattern[patternPos] * width;
}
}
return(ExecuteOutliner(width, offset));
}
/// <summary>
/// Generates a outline of the path with alternating on and off segments based on the pattern.
/// </summary>
/// <param name="path">the path to outline</param>
/// <param name="width">The final width outline</param>
/// <param name="pattern">The pattern made of multiples of the width.</param>
/// <returns>A new path representing the outline.</returns>
public static IPath GenerateOutline(this IPath path, float width, float[] pattern)
{
return(path.GenerateOutline(width, pattern, false));
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapePath"/> class.
/// </summary>
/// <param name="shape">The shape.</param>
/// <param name="pen">The pen to apply to the shape.</param>
public ShapePath(IPath shape, IPen pen)
: base(shape.GenerateOutline(pen.StrokeWidth, pen.StrokePattern))
{
}
/// <summary> /// Generates a outline of the path with alternating on and off segments based on the pattern. /// </summary> /// <param name="path">the path to outline</param> /// <param name="width">The final width outline</param> /// <param name="pattern">The pattern made of multiples of the width.</param> /// <param name="startOff">Weather the first item in the pattern is on or off.</param> /// <returns>A new path representing the outline.</returns> public static IPath GenerateOutline(this IPath path, float width, float[] pattern, bool startOff) => path.GenerateOutline(width, new ReadOnlySpan <float>(pattern), startOff);
/// <summary>
/// Generates a outline of the path with alternating on and off segments based on the pattern.
/// </summary>
/// <param name="path">the path to outline</param>
/// <param name="width">The final width outline</param>
/// <param name="pattern">The pattern made of multiples of the width.</param>
/// <returns>A new path representing the outline.</returns>
public static IPath GenerateOutline(this IPath path, float width, ReadOnlySpan <float> pattern)
{
return(path.GenerateOutline(width, pattern, false));
}
/// <summary>
/// Generates a outline of the path with alternating on and off segments based on the pattern.
/// </summary>
/// <param name="path">the path to outline</param>
/// <param name="width">The final width outline</param>
/// <param name="pattern">The pattern made of multiples of the width.</param>
/// <param name="startOff">Weather the first item in the pattern is on or off.</param>
/// <param name="jointStyle">The style to render the joints.</param>
/// <param name="patternSectionCapStyle">The style to render between sections of the specified pattern.</param>
/// <returns>A new path representing the outline.</returns>
public static IPath GenerateOutline(this IPath path, float width, ReadOnlySpan <float> pattern, bool startOff, JointStyle jointStyle = JointStyle.Square, EndCapStyle patternSectionCapStyle = EndCapStyle.Butt)
{
if (pattern.Length < 2)
{
return(path.GenerateOutline(width, jointStyle: jointStyle));
}
JoinType style = Convert(jointStyle);
EndType patternSectionCap = Convert(patternSectionCapStyle);
IEnumerable <ISimplePath> paths = path.Flatten();
var offset = new ClipperOffset()
{
MiterLimit = MiterOffsetDelta
};
var buffer = new List <IntPoint>(3);
foreach (ISimplePath p in paths)
{
bool online = !startOff;
float targetLength = pattern[0] * width;
int patternPos = 0;
// Create a new list of points representing the new outline
int pCount = p.Points.Count;
if (!p.IsClosed)
{
pCount--;
}
int i = 0;
Vector2 currentPoint = p.Points[0];
while (i < pCount)
{
int next = (i + 1) % p.Points.Count;
Vector2 targetPoint = p.Points[next];
float distToNext = Vector2.Distance(currentPoint, targetPoint);
if (distToNext > targetLength)
{
// find a point between the 2
float t = targetLength / distToNext;
Vector2 point = (currentPoint * (1 - t)) + (targetPoint * t);
buffer.Add(currentPoint.ToPoint());
buffer.Add(point.ToPoint());
// we now inset a line joining
if (online)
{
offset.AddPath(buffer, style, patternSectionCap);
}
online = !online;
buffer.Clear();
currentPoint = point;
// next length
patternPos = (patternPos + 1) % pattern.Length;
targetLength = pattern[patternPos] * width;
}
else if (distToNext <= targetLength)
{
buffer.Add(currentPoint.ToPoint());
currentPoint = targetPoint;
i++;
targetLength -= distToNext;
}
}
if (buffer.Count > 0)
{
if (p.IsClosed)
{
buffer.Add(p.Points.First().ToPoint());
}
else
{
buffer.Add(p.Points.Last().ToPoint());
}
if (online)
{
offset.AddPath(buffer, style, patternSectionCap);
}
online = !online;
buffer.Clear();
patternPos = (patternPos + 1) % pattern.Length;
targetLength = pattern[patternPos] * width;
}
}
return(ExecuteOutliner(width, offset));
}
/// <summary>
/// Initializes a new instance of the <see cref="ShapePath"/> class.
/// </summary>
/// <param name="shape">The shape.</param>
/// <param name="pen">The pen to apply to the shape.</param>
// SixLabors.shape willbe moving to a Span/ReadOnlySpan based API shortly use ToArray for now.
public ShapePath(IPath shape, Pens.IPen pen)
: base(shape.GenerateOutline(pen.StrokeWidth, pen.StrokePattern.ToArray()))
{
}
/// <summary>
/// Generates an outline of the path with alternating on and off segments based on the pattern.
/// </summary>
/// <param name="path">The path to outline</param>
/// <param name="width">The outline width.</param>
/// <param name="pattern">The pattern made of multiples of the width.</param>
/// <param name="startOff">Whether the first item in the pattern is on or off.</param>
/// <param name="jointStyle">The style to apply to the joints.</param>
/// <param name="endCapStyle">The style to apply to the end caps.</param>
/// <returns>A new <see cref="IPath"/> representing the outline.</returns>
/// <exception cref="ClipperException">Thrown when an offset cannot be calculated.</exception>
public static IPath GenerateOutline(this IPath path, float width, ReadOnlySpan <float> pattern, bool startOff, JointStyle jointStyle, EndCapStyle endCapStyle)
{
if (pattern.Length < 2)
{
return(path.GenerateOutline(width, jointStyle, endCapStyle));
}
IEnumerable <ISimplePath> paths = path.Flatten();
ClipperOffset offset = new(MiterOffsetDelta);
List <PointF> buffer = new();
foreach (ISimplePath p in paths)
{
bool online = !startOff;
float targetLength = pattern[0] * width;
int patternPos = 0;
ReadOnlySpan <PointF> points = p.Points.Span;
// Create a new list of points representing the new outline
int pCount = points.Length;
if (!p.IsClosed)
{
pCount--;
}
int i = 0;
Vector2 currentPoint = points[0];
while (i < pCount)
{
int next = (i + 1) % points.Length;
Vector2 targetPoint = points[next];
float distToNext = Vector2.Distance(currentPoint, targetPoint);
if (distToNext > targetLength)
{
// find a point between the 2
float t = targetLength / distToNext;
Vector2 point = (currentPoint * (1 - t)) + (targetPoint * t);
buffer.Add(currentPoint);
buffer.Add(point);
// we now inset a line joining
if (online)
{
offset.AddPath(new ReadOnlySpan <PointF>(buffer.ToArray()), jointStyle, endCapStyle);
}
online = !online;
buffer.Clear();
currentPoint = point;
// next length
patternPos = (patternPos + 1) % pattern.Length;
targetLength = pattern[patternPos] * width;
}
else if (distToNext <= targetLength)
{
buffer.Add(currentPoint);
currentPoint = targetPoint;
i++;
targetLength -= distToNext;
}
}
if (buffer.Count > 0)
{
if (p.IsClosed)
{
buffer.Add(points[0]);
}
else
{
buffer.Add(points[points.Length - 1]);
}
if (online)
{
offset.AddPath(new ReadOnlySpan <PointF>(buffer.ToArray()), jointStyle, endCapStyle);
}
online = !online;
buffer.Clear();
patternPos = (patternPos + 1) % pattern.Length;
targetLength = pattern[patternPos] * width;
}
}
return(offset.Execute(width));
}
