public SKPathMeasure (SKPath path, bool forceClosed = false, float resScale = 1)
: this (SkiaApi.sk_pathmeasure_new_with_path (path == null ? IntPtr.Zero : path.Handle, forceClosed, resScale), true)
{
if (Handle == IntPtr.Zero) {
throw new InvalidOperationException ("Unable to create a new SKPathMeasure instance.");
}
}
static SkiaSharp.SKPath CreatePolygon(PixelFarm.Drawing.PointF[] points)
{
SkiaSharp.SKPath p = new SkiaSharp.SKPath();
int j = points.Length;
PixelFarm.Drawing.PointF p0 = new PixelFarm.Drawing.PointF();
for (int i = 0; i < j; ++i)
{
if (i == 0)
{
p0 = points[0];
p.MoveTo(p0.X, p0.Y);
}
else if (i == j - 1)
{
//last one
var point = points[i];
p.LineTo(point.X, point.Y);
p.LineTo(p0.X, p0.Y);
p.Close();
break;
}
else
{
var point = points[i];
p.LineTo(point.X, point.Y);
}
}
return(p);
}
private static SKPath ToSkia(IViewport viewport, Polygon polygon)
{
var vertices = polygon.ExteriorRing.Vertices;
var path = new SKPath();
{
// todo: use transform matrix
var first = viewport.WorldToScreen(vertices[0].X, vertices[0].Y);
path.MoveTo((float)first.X, (float) first.Y);
for (var i = 1; i < vertices.Count; i++)
{
var point = viewport.WorldToScreen(vertices[i].X, vertices[i].Y);
path.LineTo((float) point.X, (float) point.Y);
}
path.Close();
foreach (var interiorRing in polygon.InteriorRings)
{
// note: For Skia inner rings need to be clockwise and outer rings
// need to be counter clockwise (if this is the other way around it also
// seems to work)
// this is not a requirement of the OGC polygon.
var firstInner = viewport.WorldToScreen(interiorRing.Vertices[0].X, interiorRing.Vertices[0].Y);
path.MoveTo((float)firstInner.X, (float)firstInner.Y);
for (var i = 1; i < interiorRing.Vertices.Count; i++)
{
var point = viewport.WorldToScreen(interiorRing.Vertices[i].X, interiorRing.Vertices[i].Y);
path.LineTo((float)point.X, (float)point.Y);
}
}
path.Close();
return path;
}
}
public IStreamGeometryContextImpl Open()
{
_path = new SKPath();
_path.FillType = SKPathFillType.EvenOdd;
return new StreamContext(this);
}
public SKPath(SKPath path)
: this (SkiaApi.sk_path_clone(path.Handle), true)
{
if (Handle == IntPtr.Zero) {
throw new InvalidOperationException ("Unable to copy the SKPath instance.");
}
}
public bool SetPath(SKPath path, SKRegion clip)
{
if (path == null)
throw new ArgumentNullException (nameof (path));
if (clip == null)
throw new ArgumentNullException (nameof (clip));
return SkiaApi.sk_region_set_path(Handle, path.Handle, clip.Handle);
}
public static SKPath CreateGraphicsPath(VertexStore vxs)
{
//render vertice in store
int vcount = vxs.Count;
double prevX = 0;
double prevY = 0;
double prevMoveToX = 0;
double prevMoveToY = 0;
//var brush_path = new System.Drawing.Drawing2D.GraphicsPath(FillMode.Winding);//*** winding for overlapped path
var brushPath = new SKPath();
//how to set widening mode
for (int i = 0; i < vcount; ++i)
{
double x, y;
PixelFarm.Agg.VertexCmd cmd = vxs.GetVertex(i, out x, out y);
switch (cmd)
{
case PixelFarm.Agg.VertexCmd.MoveTo:
prevMoveToX = prevX = x;
prevMoveToY = prevY = y;
//brush_path.StartFigure();
brushPath.MoveTo((float)x, (float)y);
break;
case PixelFarm.Agg.VertexCmd.LineTo:
//brush_path.AddLine((float)prevX, (float)prevY, (float)x, (float)y);
brushPath.LineTo((float)x, (float)y);
prevX = x;
prevY = y;
break;
case PixelFarm.Agg.VertexCmd.CloseAndEndFigure:
//brush_path.AddLine((float)prevX, (float)prevY, (float)prevMoveToX, (float)prevMoveToY);
brushPath.LineTo((float)prevMoveToX, (float)prevMoveToY);
prevMoveToX = prevX = x;
prevMoveToY = prevY = y;
//brush_path.CloseFigure();
brushPath.Close();
break;
case PixelFarm.Agg.VertexCmd.EndFigure:
break;
case PixelFarm.Agg.VertexCmd.Stop:
i = vcount + 1;//exit from loop
break;
default:
throw new NotSupportedException();
}
}
return brushPath;
}
private static SKPath ToSkia(List<Point> vertices)
{
var points = new SKPath();
for (var i = 0; i < vertices.Count; i++)
{
if (i == 0)
{
points.MoveTo((float)vertices[i].X, (float)vertices[i].Y);
}
else
{
points.LineTo((float)vertices[i].X, (float)vertices[i].Y);
}
}
return points;
}
/// <summary>
/// we do NOT store vxsSnap
/// </summary>
/// <param name="vxsSnap"></param>
/// <returns></returns>
public static SKPath CreateGraphicsPath(VertexStoreSnap vxsSnap)
{
VertexSnapIter vxsIter = vxsSnap.GetVertexSnapIter();
double prevX = 0;
double prevY = 0;
double prevMoveToX = 0;
double prevMoveToY = 0;
//var brush_path = new System.Drawing.Drawing2D.GraphicsPath(FillMode.Winding);//*** winding for overlapped path
var brushPath = new SKPath();
for (;;)
{
double x, y;
VertexCmd cmd = vxsIter.GetNextVertex(out x, out y);
switch (cmd)
{
case PixelFarm.Agg.VertexCmd.MoveTo:
prevMoveToX = prevX = x;
prevMoveToY = prevY = y;
brushPath.MoveTo((float)x, (float)y);
break;
case PixelFarm.Agg.VertexCmd.LineTo:
//brushPath.AddLine((float)prevX, (float)prevY, (float)x, (float)y);
brushPath.LineTo((float)x, (float)y);
prevX = x;
prevY = y;
break;
case PixelFarm.Agg.VertexCmd.CloseAndEndFigure:
//from current point
//brushPath.AddLine((float)prevX, (float)prevY, (float)prevMoveToX, (float)prevMoveToY);
brushPath.LineTo((float)prevMoveToX, (float)prevMoveToY);
prevX = prevMoveToX;
prevY = prevMoveToY;
//brushPath.CloseFigure();
brushPath.Close();
break;
case PixelFarm.Agg.VertexCmd.EndFigure:
goto EXIT_LOOP;
case PixelFarm.Agg.VertexCmd.Stop:
goto EXIT_LOOP;
default:
throw new NotSupportedException();
}
}
EXIT_LOOP:
return brushPath;
}
void ApplyTransform()
{
if (_path == null)
return;
if (_transformedPath != null)
{
_transformedPath.Dispose();
_transformedPath = null;
}
if (!Transform.IsIdentity)
{
_transformedPath = new SKPath(_path);
_transformedPath.Transform(Transform.ToSKMatrix());
}
}
internal Iterator(SKPath path, bool forceClose)
: base(SkiaApi.sk_path_create_iter(path.Handle, forceClose ? 1 : 0))
{
this.path = path;
}
public void AddPath(SKPath other, ref SKMatrix matrix, AddMode mode)
{
AddPath(other, ref matrix, (SKPathAddMode)mode);
}
void DrawArc (SKCanvas canvas, SKPaint paint, double startAngleInDegrees, double endAngleInDegrees)
{
// find center and radius
var centerx = (float)Bounds.Width / 2;
var centery = (float)Bounds.Height / 2;
var radius = Bounds.Width < Bounds.Height ? (float)Bounds.Width / 2 : (float)Bounds.Height / 2;
var w = 0.558f;
// convert degrees to radians
var startAngleRadians = startAngleInDegrees * Math.PI / 180;
var endAngleRadians = endAngleInDegrees * Math.PI / 180;
// find x,y coordinates for start and end points
var startx = centerx + radius * (float)Math.Cos (startAngleRadians);
var starty = centery + radius * (float)Math.Sin (startAngleRadians);
var startPoint = new SKPoint (startx, starty);
var endx = centerx + radius * (float)Math.Cos (endAngleRadians);
var endy = centery + radius * (float)Math.Sin (endAngleRadians);
var endPoint = new SKPoint (endx, endy);
// find linear distance & midpoint between start and end points
var linearDistance = Math.Sqrt(Math.Pow(endy - starty, 2) / Math.Pow(endx - startx, 2));
var midx = (startx + endx) / 2;
var midy = (starty + endy) / 2;
var midPoint = new SKPoint (midx, midy);
// rotate end point 45 degrees counterclockwise around midpoint to find Conic function anchor
var anchorPoint = RotatePoint (endPoint, midPoint, 45);
// build path
var path = new SKPath ();
//path.MoveTo (startx, starty);
//path.ConicTo (anchorPoint.X, anchorPoint.Y, endx, endy, w);
path.MoveTo (centerx, centery - radius);
path.ConicTo (centerx + radius, centery - radius, centerx + radius, centery, w);
path.ConicTo (centerx + radius, centery + radius, centerx, centery + radius, w);
path.ConicTo (centerx - radius, centery + radius, centerx - radius, centery, w);
//path.ConicTo (centerx - radius, centery - radius, centerx, centery - radius, w);
//canvas.DrawPoints (SKPointMode.Points, new SKPoint [] { }, paint);
canvas.DrawPath (path, paint);
}
public void DrawTextOnPath(byte[] text, SKPath path, SKPoint offset, SKPaint paint)
{
DrawTextOnPath(text, path, offset.X, offset.Y, paint);
}
public static SKPathEffect Create1DPath(SKPath path, float advance, float phase, SkPath1DPathEffectStyle style)
{
return Create1DPath(path, advance, phase, (SKPath1DPathEffectStyle)style);
}
public void DrawPath(SKPath path, SKPaint paint)
{
if (paint == null)
throw new ArgumentNullException (nameof (paint));
if (path == null)
throw new ArgumentNullException (nameof (path));
SkiaApi.sk_canvas_draw_path (Handle, path.Handle, paint.Handle);
}
// DrawTextOnPath
public void DrawTextOnPath(string text, SKPath path, SKPoint offset, SKPaint paint)
{
DrawTextOnPath(text, path, offset, true, paint);
}
public void DrawText(byte[] text, SKPath path, float hOffset, float vOffset, SKPaint paint)
{
DrawTextOnPath(text, path, hOffset, vOffset, paint);
}
public void Add(SKPath path, SKPathOp op)
{
SkiaApi.sk_opbuilder_add(Handle, path.Handle, op);
}
public override void DrawBezierCurve(float startX, float startY, float endX, float endY, float controlX1, float controlY1, float controlX2, float controlY2)
{
using (SKPath p = new SKPath())
{
p.MoveTo(startX, startY);
p.CubicTo(controlX1, controlY1,
controlY1, controlY2,
endX, endY);
_skCanvas.DrawPath(p, _stroke);
}
}
public StreamContext(StreamGeometryImpl geometryImpl)
{
_geometryImpl = geometryImpl;
_path = _geometryImpl._path;
}
public IStreamGeometryContextImpl Open()
{
_path = new SKPath();
return new StreamContext(this);
}
public static SKTextBlob CreatePathPositioned(IntPtr text, int length, SKTextEncoding encoding, SKFont font, SKPath path, SKTextAlign textAlign = SKTextAlign.Left, SKPoint origin = default) => CreatePathPositioned(text.AsReadOnlySpan(length), encoding, font, path, textAlign, origin);
// AddPathPositionedRun
public void AddPathPositionedRun(ReadOnlySpan <ushort> glyphs, SKFont font, ReadOnlySpan <float> glyphWidths, ReadOnlySpan <SKPoint> glyphOffsets, SKPath path, SKTextAlign textAlign = SKTextAlign.Left)
{
using var pathMeasure = new SKPathMeasure(path);
var contourLength = pathMeasure.Length;
var textLength = glyphOffsets[glyphs.Length - 1].X + glyphWidths[glyphs.Length - 1];
var alignment = (int)textAlign * 0.5f;
var startOffset = glyphOffsets[0].X + (contourLength - textLength) * alignment;
var firstGlyphIndex = 0;
var pathGlyphCount = 0;
using var glyphTransforms = Utils.RentArray <SKRotationScaleMatrix> (glyphs.Length);
// TODO: deal with multiple contours?
for (var index = 0; index < glyphOffsets.Length; index++)
{
var glyphOffset = glyphOffsets[index];
var halfWidth = glyphWidths[index] * 0.5f;
var pathOffset = startOffset + glyphOffset.X + halfWidth;
// TODO: clip glyphs on both ends of paths
if (pathOffset >= 0 && pathOffset < contourLength && pathMeasure.GetPositionAndTangent(pathOffset, out var position, out var tangent))
{
if (pathGlyphCount == 0)
{
firstGlyphIndex = index;
}
var tx = tangent.X;
var ty = tangent.Y;
var px = position.X;
var py = position.Y;
// horizontally offset the position using the tangent vector
px -= tx * halfWidth;
py -= ty * halfWidth;
// vertically offset the position using the normal vector (-ty, tx)
var dy = glyphOffset.Y;
px -= dy * ty;
py += dy * tx;
glyphTransforms.Span[pathGlyphCount++] = new SKRotationScaleMatrix(tx, ty, px, py);
}
}
var glyphSubset = glyphs.Slice(firstGlyphIndex, pathGlyphCount);
var positions = glyphTransforms.Span.Slice(0, pathGlyphCount);
AddRotationScaleRun(glyphSubset, font, positions);
}
public void ClipPath(SKPath path, SKRegionOperation operation, bool antialias = false)
{
ClipPath(path, (SKClipOperation)(int)operation, antialias);
}
// SetPath
public void SetPath(SKPath path) =>
SetPath(path, false);
public void SetPath (SKPath path, bool forceClosed)
{
SkiaApi.sk_pathmeasure_set_path (Handle, path == null ? IntPtr.Zero : path.Handle, forceClosed);
}
public bool Op(SKPath path, SKRegionOperation op)
{
using (var pathRegion = new SKRegion(path)) {
return(Op(pathRegion, op));
}
}
public bool SetPath(SKPath path)
{
return(SkiaApi.sk_region_set_path(Handle, path.Handle));
}
public SKRegion(SKPath path)
: this(SKRectI.Ceiling(path.Bounds))
{
SetPath(path);
}
public void DrawText(string text, SKPath path, float hOffset, float vOffset, SKPaint paint)
{
if (text == null)
throw new ArgumentNullException ("text");
if (paint == null)
throw new ArgumentNullException (nameof (paint));
if (paint == null)
throw new ArgumentNullException (nameof (paint));
var bytes = Util.GetEncodedText (text, paint.TextEncoding);
SkiaApi.sk_canvas_draw_text_on_path (Handle, bytes, bytes.Length, path.Handle, hOffset, vOffset, paint.Handle);
}
private void ReadElement(XElement e, SKCanvas canvas, SKPaint stroke, SKPaint fill)
{
// transform matrix
var transform = ReadTransform(e.Attribute("transform")?.Value ?? string.Empty);
canvas.Save();
canvas.Concat(ref transform);
// SVG element
var elementName = e.Name.LocalName;
var isGroup = elementName == "g";
// read style
var style = ReadPaints(e, ref stroke, ref fill, isGroup);
// parse elements
switch (elementName)
{
case "text":
if (stroke != null || fill != null)
{
ReadText(e, canvas, stroke?.Clone(), fill?.Clone());
}
break;
case "rect":
if (stroke != null || fill != null)
{
var x = ReadNumber(e.Attribute("x"));
var y = ReadNumber(e.Attribute("y"));
var width = ReadNumber(e.Attribute("width"));
var height = ReadNumber(e.Attribute("height"));
var rx = ReadNumber(e.Attribute("rx"));
var ry = ReadNumber(e.Attribute("ry"));
var rect = SKRect.Create(x, y, width, height);
if (rx > 0 || ry > 0)
{
if (fill != null)
{
canvas.DrawRoundRect(rect, rx, ry, fill);
}
if (stroke != null)
{
canvas.DrawRoundRect(rect, rx, ry, stroke);
}
}
else
{
if (fill != null)
{
canvas.DrawRect(rect, fill);
}
if (stroke != null)
{
canvas.DrawRect(rect, stroke);
}
}
}
break;
case "ellipse":
if (stroke != null || fill != null)
{
var cx = ReadNumber(e.Attribute("cx"));
var cy = ReadNumber(e.Attribute("cy"));
var rx = ReadNumber(e.Attribute("rx"));
var ry = ReadNumber(e.Attribute("ry"));
if (fill != null)
{
canvas.DrawOval(cx, cy, rx, ry, fill);
}
if (stroke != null)
{
canvas.DrawOval(cx, cy, rx, ry, stroke);
}
}
break;
case "circle":
if (stroke != null || fill != null)
{
var cx = ReadNumber(e.Attribute("cx"));
var cy = ReadNumber(e.Attribute("cy"));
var rr = ReadNumber(e.Attribute("r"));
if (fill != null)
{
canvas.DrawCircle(cx, cy, rr, fill);
}
if (stroke != null)
{
canvas.DrawCircle(cx, cy, rr, stroke);
}
}
break;
case "path":
if (stroke != null || fill != null)
{
var d = e.Attribute("d")?.Value;
if (!string.IsNullOrWhiteSpace(d))
{
var path = SKPath.ParseSvgPathData(d);
if (fill != null)
{
canvas.DrawPath(path, fill);
}
if (stroke != null)
{
canvas.DrawPath(path, stroke);
}
}
}
break;
case "polygon":
case "polyline":
if (stroke != null || fill != null)
{
var close = elementName == "polygon";
var p = e.Attribute("points")?.Value;
if (!string.IsNullOrWhiteSpace(p))
{
var path = ReadPolyPath(p, close);
if (fill != null)
{
canvas.DrawPath(path, fill);
}
if (stroke != null)
{
canvas.DrawPath(path, stroke);
}
}
}
break;
case "g":
if (e.HasElements)
{
// get current group opacity
float groupOpacity = ReadOpacity(style);
if (groupOpacity != 1.0f)
{
var opacity = (byte)(255 * groupOpacity);
var opacityPaint = new SKPaint {
Color = SKColors.Black.WithAlpha(opacity)
};
// apply the opacity
canvas.SaveLayer(opacityPaint);
}
foreach (var gElement in e.Elements())
{
ReadElement(gElement, canvas, stroke?.Clone(), fill?.Clone());
}
// restore state
if (groupOpacity != 1.0f)
{
canvas.Restore();
}
}
break;
case "use":
if (e.HasAttributes)
{
var href = ReadHref(e);
if (href != null)
{
// TODO: copy/process other attributes
var x = ReadNumber(e.Attribute("x"));
var y = ReadNumber(e.Attribute("y"));
var useTransform = SKMatrix.MakeTranslation(x, y);
canvas.Save();
canvas.Concat(ref useTransform);
ReadElement(href, canvas, stroke?.Clone(), fill?.Clone());
canvas.Restore();
}
}
break;
case "line":
if (stroke != null)
{
var x1 = ReadNumber(e.Attribute("x1"));
var x2 = ReadNumber(e.Attribute("x2"));
var y1 = ReadNumber(e.Attribute("y1"));
var y2 = ReadNumber(e.Attribute("y2"));
canvas.DrawLine(x1, y1, x2, y2, stroke);
}
break;
case "switch":
if (e.HasElements)
{
foreach (var ee in e.Elements())
{
var requiredFeatures = ee.Attribute("requiredFeatures");
var requiredExtensions = ee.Attribute("requiredExtensions");
var systemLanguage = ee.Attribute("systemLanguage");
// TODO: evaluate requiredFeatures, requiredExtensions and systemLanguage
var isVisible =
requiredFeatures == null &&
requiredExtensions == null &&
systemLanguage == null;
if (isVisible)
{
ReadElement(ee, canvas, stroke?.Clone(), fill?.Clone());
}
}
}
break;
case "defs":
case "title":
case "desc":
case "description":
// already read earlier
break;
default:
LogOrThrow($"SVG element '{elementName}' is not supported");
break;
}
// restore matrix
canvas.Restore();
}
internal static SKTextBlob CreatePathPositioned(void *text, int length, SKTextEncoding encoding, SKFont font, SKPath path, SKTextAlign textAlign = SKTextAlign.Left, SKPoint origin = default)
{
if (font == null)
{
throw new ArgumentNullException(nameof(font));
}
var count = font.CountGlyphs(text, length, encoding);
if (count <= 0)
{
return(null);
}
// we use temporary arrays because we might only use part of the text
using var glyphs = Utils.RentArray <ushort> (count);
using var glyphWidths = Utils.RentArray <float> (glyphs.Length);
using var glyphOffsets = Utils.RentArray <SKPoint> (glyphs.Length);
font.GetGlyphs(text, length, encoding, glyphs);
font.GetGlyphWidths(glyphs, glyphWidths, Span <SKRect> .Empty);
font.GetGlyphPositions(glyphs, glyphOffsets, origin);
using var builder = new SKTextBlobBuilder();
builder.AddPathPositionedRun(glyphs, font, glyphWidths, glyphOffsets, path, textAlign);
return(builder.Build());
}
public bool GetFillPath(SKPath src, SKPath dst, float resScale = 1)
{
if (src == null)
throw new ArgumentNullException(nameof(src));
if (dst == null)
throw new ArgumentNullException(nameof(dst));
return SkiaApi.sk_paint_get_fill_path(Handle, src.Handle, dst.Handle, IntPtr.Zero, resScale);
}
internal RawIterator(SKPath path, IntPtr handle)
{
this.path = path;
this.handle = handle;
}
// CreatePathPositioned
public static SKTextBlob CreatePathPositioned(string text, SKFont font, SKPath path, SKTextAlign textAlign = SKTextAlign.Left, SKPoint origin = default) =>
CreatePathPositioned(text.AsSpan(), font, path, textAlign, origin);
public void AddPath(SKPath other, float dx, float dy, SKPath.AddMode mode)
{
AddPath(other, dx, dy, (SKPathAddMode)mode);
}
public SKRegion(SKPath path)
: this()
{
SetPath(path);
}
public void AddPath(SKPath other, AddMode mode)
{
AddPath(other, (SKPathAddMode)mode);
}
private void DrawLineCurveInternal(SKCanvas canvas, SKPaint pen, bool isStroked, ref SKPoint pt1, ref SKPoint pt2, double curvature, CurveOrientation orientation, PointAlignment pt1a, PointAlignment pt2a)
{
if (isStroked)
{
using (var path = new SKPath())
{
path.MoveTo(pt1.X, pt1.Y);
double p1x = pt1.X;
double p1y = pt1.Y;
double p2x = pt2.X;
double p2y = pt2.Y;
XLineExtensions.GetCurvedLineBezierControlPoints(orientation, curvature, pt1a, pt2a, ref p1x, ref p1y, ref p2x, ref p2y);
path.CubicTo(
(float)p1x,
(float)p1y,
(float)p2x,
(float)p2y,
pt2.X, pt2.Y);
canvas.DrawPath(path, pen);
}
}
}
internal RawIterator(SKPath path)
: base(SkiaApi.sk_path_create_rawiter(path.Handle))
{
this.path = path;
}
private void DrawPathInternal(SKCanvas canvas, SKPaint brush, SKPaint pen, bool isStroked, bool isFilled, SKPath path)
{
if (isFilled)
{
canvas.DrawPath(path, brush);
}
if (isStroked)
{
canvas.DrawPath(path, pen);
}
}
public void SetPath(SKPath path, bool forceClosed)
{
SkiaApi.sk_pathmeasure_set_path(Handle, path == null ? IntPtr.Zero : path.Handle, forceClosed);
}
/// <inheritdoc/>
public override void Draw(object dc, XArc arc, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
var canvas = dc as SKCanvas;
using (SKPaint brush = ToSKPaintBrush(arc.Style.Fill))
using (SKPaint pen = ToSKPaintPen(arc.Style, _scaleToPage, _sourceDpi, _targetDpi))
using (var path = new SKPath())
{
var a = GdiArc.FromXArc(arc);
var rect = new SKRect(
_scaleToPage(a.X + dx),
_scaleToPage(a.Y + dy),
_scaleToPage(a.X + dx + a.Width),
_scaleToPage(a.Y + dy + a.Height));
path.AddArc(rect, (float)a.StartAngle, (float)a.SweepAngle);
DrawPathInternal(canvas, brush, pen, arc.IsStroked, arc.IsFilled, path);
}
}
public void DrawText(IntPtr buffer, int length, SKPath path, float hOffset, float vOffset, SKPaint paint)
{
DrawTextOnPath(buffer, length, path, hOffset, vOffset, paint);
}
/// <inheritdoc/>
public override void Draw(object dc, XQuadraticBezier quadraticBezier, double dx, double dy, ImmutableArray<XProperty> db, XRecord r)
{
var canvas = dc as SKCanvas;
using (SKPaint brush = ToSKPaintBrush(quadraticBezier.Style.Fill))
using (SKPaint pen = ToSKPaintPen(quadraticBezier.Style, _scaleToPage, _sourceDpi, _targetDpi))
using (var path = new SKPath())
{
path.MoveTo(
_scaleToPage(quadraticBezier.Point1.X + dx),
_scaleToPage(quadraticBezier.Point1.Y + dy));
path.QuadTo(
_scaleToPage(quadraticBezier.Point2.X + dx),
_scaleToPage(quadraticBezier.Point2.Y + dy),
_scaleToPage(quadraticBezier.Point3.X + dx),
_scaleToPage(quadraticBezier.Point3.Y + dy));
DrawPathInternal(canvas, brush, pen, quadraticBezier.IsStroked, quadraticBezier.IsFilled, path);
}
}
public bool QuickReject (SKPath path)
{
if (path == null)
throw new ArgumentNullException (nameof (path));
return path.IsEmpty || QuickReject (path.Bounds);
}
public static void FillPath(SKCanvas g, SKPath p, SKPaint fill)
{
g.DrawPath(p, fill);
}
public bool GetSegment (float start, float stop, SKPath dst, bool startWithMoveTo)
{
if (dst == null)
throw new ArgumentNullException (nameof (dst));
return SkiaApi.sk_pathmeasure_get_segment (Handle, start, stop, dst.Handle, startWithMoveTo);
}
public static void DrawPath(SKCanvas g, SKPath p, SKPaint stroke)
{
g.DrawPath(p, stroke);
}
static SkiaSharp.SKPath ResolveGraphicsPath(GraphicsPath path)
{
//convert from graphics path to internal presentation
SkiaSharp.SKPath innerPath = path.InnerPath as SkiaSharp.SKPath;
if (innerPath != null)
{
return(innerPath);
}
//--------
innerPath = new SkiaSharp.SKPath();
path.InnerPath = innerPath;
List <float> points;
List <PathCommand> cmds;
GraphicsPath.GetPathData(path, out points, out cmds);
int j = cmds.Count;
int p_index = 0;
for (int i = 0; i < j; ++i)
{
PathCommand cmd = cmds[i];
switch (cmd)
{
default:
throw new NotSupportedException();
case PathCommand.Arc:
var oval = SkiaSharp.SKRect.Create(points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]);
innerPath.ArcTo(oval,
points[p_index + 4],
points[p_index + 5],
true);
p_index += 6;
break;
case PathCommand.Bezier:
innerPath.MoveTo(points[p_index]
, points[p_index + 1]);
innerPath.CubicTo(
points[p_index + 2],
points[p_index + 3],
points[p_index + 4],
points[p_index + 5],
points[p_index + 6],
points[p_index + 7]);
p_index += 8;
break;
case PathCommand.CloseFigure:
//?
break;
case PathCommand.Ellipse:
innerPath.AddOval(
SkiaSharp.SKRect.Create(
points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]
));
p_index += 4;
break;
case PathCommand.Line:
innerPath.MoveTo(points[p_index],
points[p_index + 1]);
innerPath.LineTo(
points[p_index + 2],
points[p_index + 3]);
p_index += 4;
break;
case PathCommand.Rect:
innerPath.AddRect(
SkiaSharp.SKRect.Create(
points[p_index],
points[p_index + 1],
points[p_index + 2],
points[p_index + 3]
));
p_index += 4;
break;
case PathCommand.StartFigure:
break;
}
}
return(innerPath);
}
public static SKPathEffect Create1DPath(SKPath path, float advance, float phase, SkPath1DPathEffectStyle style)
{
return(Create1DPath(path, advance, phase, (SKPath1DPathEffectStyle)style));
}
public void ClipPath(SKPath path, SKRegionOperation operation = SKRegionOperation.Intersect, bool antialias = false)
{
if (path == null)
throw new ArgumentNullException (nameof (path));
SkiaApi.sk_canvas_clip_path_with_operation (Handle, path.Handle, operation, antialias);
}
public void DrawTextOnPath(string text, SKPath path, float hOffset, float vOffset, SKPaint paint)
{
DrawTextOnPath(text, path, new SKPoint(hOffset, vOffset), true, paint);
}
public void DrawText(IntPtr buffer, int length, SKPath path, float hOffset, float vOffset, SKPaint paint)
{
if (buffer == IntPtr.Zero)
throw new ArgumentNullException ("buffer");
if (paint == null)
throw new ArgumentNullException (nameof (paint));
if (paint == null)
throw new ArgumentNullException (nameof (paint));
SkiaApi.sk_canvas_draw_text_on_path (Handle, buffer, length, path.Handle, hOffset, vOffset, paint.Handle);
}
#pragma warning restore 414
public static void DrawXamagon(SKCanvas canvas, int width, int height)
{
// Width 41.6587026 => 144.34135
// Height 56 => 147
var paddingFactor = .6f;
var imageLeft = 41.6587026f;
var imageRight = 144.34135f;
var imageTop = 56f;
var imageBottom = 147f;
var imageWidth = imageRight - imageLeft;
var scale = (((float)height > width ? width : height) / imageWidth) * paddingFactor;
var translateX = (imageLeft + imageRight) / -2 + width / scale * 1 / 2;
var translateY = (imageBottom + imageTop) / -2 + height / scale * 1 / 2;
canvas.Scale(scale, scale);
canvas.Translate(translateX, translateY);
using (var paint = new SKPaint()) {
paint.IsAntialias = true;
paint.Color = SKColors.White;
canvas.DrawPaint(paint);
paint.StrokeCap = SKStrokeCap.Round;
var t = paint.StrokeCap;
using (var path = new SKPath()) {
path.MoveTo(71.4311121f, 56f);
path.CubicTo(68.6763107f, 56.0058575f, 65.9796704f, 57.5737917f, 64.5928855f, 59.965729f);
path.LineTo(43.0238921f, 97.5342563f);
path.CubicTo(41.6587026f, 99.9325978f, 41.6587026f, 103.067402f, 43.0238921f, 105.465744f);
path.LineTo(64.5928855f, 143.034271f);
path.CubicTo(65.9798162f, 145.426228f, 68.6763107f, 146.994582f, 71.4311121f, 147f);
path.LineTo(114.568946f, 147f);
path.CubicTo(117.323748f, 146.994143f, 120.020241f, 145.426228f, 121.407172f, 143.034271f);
path.LineTo(142.976161f, 105.465744f);
path.CubicTo(144.34135f, 103.067402f, 144.341209f, 99.9325978f, 142.976161f, 97.5342563f);
path.LineTo(121.407172f, 59.965729f);
path.CubicTo(120.020241f, 57.5737917f, 117.323748f, 56.0054182f, 114.568946f, 56f);
path.LineTo(71.4311121f, 56f);
path.Close();
paint.Color = XamDkBlue;
canvas.DrawPath(path, paint);
}
using (var path = new SKPath()) {
path.MoveTo(71.8225901f, 77.9780432f);
path.CubicTo(71.8818491f, 77.9721857f, 71.9440029f, 77.9721857f, 72.0034464f, 77.9780432f);
path.LineTo(79.444074f, 77.9780432f);
path.CubicTo(79.773437f, 77.9848769f, 80.0929203f, 78.1757336f, 80.2573978f, 78.4623994f);
path.LineTo(92.8795281f, 101.015639f);
path.CubicTo(92.9430615f, 101.127146f, 92.9839987f, 101.251384f, 92.9995323f, 101.378901f);
path.CubicTo(93.0150756f, 101.251354f, 93.055974f, 101.127107f, 93.1195365f, 101.015639f);
path.LineTo(105.711456f, 78.4623994f);
path.CubicTo(105.881153f, 78.167045f, 106.215602f, 77.975134f, 106.554853f, 77.9780432f);
path.LineTo(113.995483f, 77.9780432f);
path.CubicTo(114.654359f, 77.9839007f, 115.147775f, 78.8160066f, 114.839019f, 79.4008677f);
path.LineTo(102.518299f, 101.500005f);
path.LineTo(114.839019f, 123.568869f);
path.CubicTo(115.176999f, 124.157088f, 114.671442f, 125.027775f, 113.995483f, 125.021957f);
path.LineTo(106.554853f, 125.021957f);
path.CubicTo(106.209673f, 125.019028f, 105.873247f, 124.81384f, 105.711456f, 124.507327f);
path.LineTo(93.1195365f, 101.954088f);
path.CubicTo(93.0560031f, 101.84258f, 93.0150659f, 101.718333f, 92.9995323f, 101.590825f);
path.CubicTo(92.983989f, 101.718363f, 92.9430906f, 101.842629f, 92.8795281f, 101.954088f);
path.LineTo(80.2573978f, 124.507327f);
path.CubicTo(80.1004103f, 124.805171f, 79.7792269f, 125.008397f, 79.444074f, 125.021957f);
path.LineTo(72.0034464f, 125.021957f);
path.CubicTo(71.3274867f, 125.027814f, 70.8220664f, 124.157088f, 71.1600463f, 123.568869f);
path.LineTo(83.4807624f, 101.500005f);
path.LineTo(71.1600463f, 79.400867f);
path.CubicTo(70.8647037f, 78.86725f, 71.2250368f, 78.0919422f, 71.8225901f, 77.9780432f);
path.LineTo(71.8225901f, 77.9780432f);
path.Close();
paint.Color = SKColors.White;
canvas.DrawPath(path, paint);
}
}
}
public static SKPathEffect Create1DPath(SKPath path, float advance, float phase, SKPath1DPathEffectStyle style)
{
if (path == null)
throw new ArgumentNullException(nameof(path));
return GetObject<SKPathEffect>(SkiaApi.sk_path_effect_create_1d_path(path.Handle, advance, phase, style));
}
public void DrawTextOnPath(IntPtr buffer, int length, SKPath path, SKPoint offset, SKPaint paint)
{
DrawTextOnPath(buffer, length, path, offset.X, offset.Y, paint);
}
public static SKPathEffect Create2DPath(SKMatrix matrix, SKPath path)
{
if (path == null)
throw new ArgumentNullException(nameof(path));
return GetObject<SKPathEffect>(SkiaApi.sk_path_effect_create_2d_path(ref matrix, path.Handle));
}
public static SKTextBlob CreatePathPositioned(ReadOnlySpan <byte> text, SKTextEncoding encoding, SKFont font, SKPath path, SKTextAlign textAlign = SKTextAlign.Left, SKPoint origin = default)
{
fixed(void *t = text)
{
return(CreatePathPositioned(t, text.Length, encoding, font, path, textAlign, origin));
}
}
