|
public DrawPath ( |
||
| path | ||
| paint | ||
| return | void | |
public static void Draw(SKCanvas canvas, IViewport viewport, IStyle style, IGeometry geometry)
{
var polygon = (Polygon)geometry;
float lineWidth = 1;
var lineColor = Color.Black; // default
var fillColor = Color.Gray; // default
var vectorStyle = style as VectorStyle;
if (vectorStyle != null)
{
lineWidth = (float) vectorStyle.Outline.Width;
lineColor = vectorStyle.Outline.Color;
fillColor = vectorStyle.Fill?.Color;
}
using (var path = ToSkia(viewport, polygon))
{
using (var paint = new SKPaint())
{
paint.IsAntialias = true;
paint.StrokeWidth = lineWidth;
paint.Style = SKPaintStyle.Fill;
paint.Color = fillColor.ToSkia();
canvas.DrawPath(path, paint);
paint.Style = SKPaintStyle.Stroke;
paint.Color = lineColor.ToSkia();
canvas.DrawPath(path, paint);
}
}
}
public static void Draw(SKCanvas canvas, IViewport viewport, IStyle style, IGeometry geometry)
{
var lineString = ((LineString) geometry).Vertices;
float lineWidth = 1;
var lineColor = new Color();
var vectorStyle = style as VectorStyle;
if (vectorStyle != null)
{
lineWidth = (float) vectorStyle.Line.Width;
lineColor = vectorStyle.Line.Color;
}
var line = WorldToScreen(viewport, lineString);
var path = ToSkia(line);
using (var paint = new SKPaint())
{
paint.IsStroke = true;
paint.StrokeWidth = lineWidth;
paint.Color = lineColor.ToSkia();
paint.StrokeJoin = SKStrokeJoin.Round;
canvas.DrawPath(path, paint);
}
}
public static void FilledHeptagram(SKCanvas canvas, int width, int height)
{
var size = ((float)height > width ? width : height) * 0.75f;
var R = 0.45f * size;
var TAU = 6.2831853f;
using (var path = new SKPath()) {
path.MoveTo(R, 0.0f);
for (int i = 1; i < 7; ++i)
{
var theta = 3f * i * TAU / 7f;
path.LineTo(R * (float)Math.Cos(theta), R * (float)Math.Sin(theta));
}
path.Close();
using (var paint = new SKPaint()) {
paint.IsAntialias = true;
canvas.Clear(SKColors.White);
canvas.Translate(width / 2f, height / 2f);
canvas.DrawPath(path, paint);
}
}
}
private void ReadElement(XElement e, SKCanvas canvas, SKPaint stroke, SKPaint fill)
{
ReadPaints(e, ref stroke, ref fill);
// transform matrix
var transform = ReadTransform(e.Attribute("transform")?.Value ?? string.Empty);
canvas.Save();
canvas.Concat(ref transform);
// SVG elements
var elementName = e.Name.LocalName;
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)
{
foreach (var gElement in e.Elements())
{
ReadElement(gElement, canvas, stroke?.Clone(), fill?.Clone());
}
}
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();
}
#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);
}
}
}
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 DrawPath(IPath trackPath, PaintBrush paint) => _canvas.DrawPath(trackPath.ToSkia(), GetSKPaint(paint));
public static void DrawPath(SKCanvas g, SKPath p, SKPaint stroke)
{
g.DrawPath(p, stroke);
}
public static void FillPath(SKCanvas g, SKPath p, SKPaint fill)
{
g.DrawPath(p, fill);
}
public static void DrawVxsSnap(SKCanvas g, VertexStoreSnap vxsSnap, SKPaint stroke)
{
using (var p = CreateGraphicsPath(vxsSnap))
{
g.DrawPath(p, stroke);
}
}
public static void FillVxsSnap(SKCanvas g, VertexStoreSnap vxsSnap, SKPaint fill)
{
using (var p = CreateGraphicsPath(vxsSnap))
{
g.DrawPath(p, fill);
}
}
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);
}
}
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);
}
}
}
public static void FilledHeptagram (SKCanvas canvas, int width, int height)
{
var size = ((float)height > width ? width : height) * 0.75f;
var R = 0.45f * size;
var TAU = 6.2831853f;
using (var path = new SKPath ()) {
path.MoveTo (R, 0.0f);
for (int i = 1; i < 7; ++i) {
var theta = 3f * i * TAU / 7f;
path.LineTo (R * (float)Math.Cos (theta), R * (float)Math.Sin (theta));
}
path.Close ();
using (var paint = new SKPaint ()) {
paint.IsAntialias = true;
canvas.Clear (SKColors.White);
canvas.Translate (width / 2f, height / 2f);
canvas.DrawPath (path, paint);
}
}
}
#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 void DrawPath(IPath trackPath, PaintBrush straightTrackPaint) => _canvas.DrawPath(trackPath.ToSkia(), straightTrackPaint.ToSkia());