public static void Draw(SKCanvas canvas, IViewport viewport, IStyle style, IFeature feature, IGeometry geometry,
float opacity, SymbolCache symbolCache = null)
{
if (style is LabelStyle)
{
var worldCenter = geometry.GetBoundingBox().GetCentroid();
var center = viewport.WorldToScreen(worldCenter);
LabelRenderer.Draw(canvas, (LabelStyle)style, feature, (float)center.X, (float)center.Y, opacity);
}
else
{
var polygon = (Polygon)geometry;
float lineWidth = 1;
var lineColor = Color.Black; // default
var fillColor = Color.Gray; // default
var strokeCap = PenStrokeCap.Butt; // default
var strokeJoin = StrokeJoin.Miter; // default
var strokeMiterLimit = 4f; // default
var strokeStyle = PenStyle.Solid; // default
float[] dashArray = null; // default
var vectorStyle = style as VectorStyle;
if (vectorStyle != null)
{
lineWidth = (float)vectorStyle.Outline.Width;
lineColor = vectorStyle.Outline.Color;
strokeCap = vectorStyle.Outline.PenStrokeCap;
strokeJoin = vectorStyle.Outline.StrokeJoin;
strokeMiterLimit = vectorStyle.Outline.StrokeMiterLimit;
strokeStyle = vectorStyle.Outline.PenStyle;
dashArray = vectorStyle.Outline.DashArray;
fillColor = vectorStyle.Fill?.Color;
}
using (var path = ToSkia(viewport, polygon))
{
using (var paint = new SKPaint())
{
paint.IsAntialias = true;
// Is there a FillStyle?
if (vectorStyle.Fill?.FillStyle == FillStyle.Solid)
{
paint.StrokeWidth = lineWidth;
paint.Style = SKPaintStyle.Fill;
paint.Color = fillColor.ToSkia(opacity);
canvas.DrawPath(path, paint);
}
else
{
paint.StrokeWidth = 1;
paint.Style = SKPaintStyle.Stroke;
paint.Color = fillColor.ToSkia(opacity);
float scale = 10.0f;
SKPath fillPath = new SKPath();
SKMatrix matrix = SKMatrix.MakeScale(scale, scale);
switch (vectorStyle.Fill?.FillStyle)
{
case FillStyle.Cross:
fillPath.MoveTo(scale * 0.8f, scale * 0.8f);
fillPath.LineTo(0, 0);
fillPath.MoveTo(0, scale * 0.8f);
fillPath.LineTo(scale * 0.8f, 0);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.DiagonalCross:
fillPath.MoveTo(scale, scale);
fillPath.LineTo(0, 0);
fillPath.MoveTo(0, scale);
fillPath.LineTo(scale, 0);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.BackwardDiagonal:
fillPath.MoveTo(0, scale);
fillPath.LineTo(scale, 0);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.ForwardDiagonal:
fillPath.MoveTo(scale, scale);
fillPath.LineTo(0, 0);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.Dotted:
paint.Style = SKPaintStyle.StrokeAndFill;
fillPath.AddCircle(scale * 0.5f, scale * 0.5f, scale * 0.35f);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.Horizontal:
fillPath.MoveTo(0, scale * 0.5f);
fillPath.LineTo(scale, scale * 0.5f);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.Vertical:
fillPath.MoveTo(scale * 0.5f, 0);
fillPath.LineTo(scale * 0.5f, scale);
paint.PathEffect = SKPathEffect.Create2DPath(matrix, fillPath);
break;
case FillStyle.Bitmap:
paint.Style = SKPaintStyle.Fill;
paint.Shader = symbolCache.GetOrCreate(vectorStyle.Fill.BitmapId).Bitmap.ToShader(SKShaderTileMode.Repeat, SKShaderTileMode.Repeat);
break;
case FillStyle.BitmapRotated:
paint.Style = SKPaintStyle.Fill;
SKImage bitmap = symbolCache.GetOrCreate(vectorStyle.Fill.BitmapId).Bitmap;
paint.Shader = bitmap.ToShader(SKShaderTileMode.Repeat,
SKShaderTileMode.Repeat,
SKMatrix.MakeRotation((float)(viewport.Rotation * System.Math.PI / 180.0f), bitmap.Width >> 1, bitmap.Height >> 1));
break;
}
// Do this, because if not, path isn't filled complete
using (new SKAutoCanvasRestore(canvas))
{
canvas.ClipPath(path);
var bounds = path.Bounds;
// Make sure, that the brush starts with the correct position
var inflate = ((int)path.Bounds.Width * 0.3f / scale) * scale;
bounds.Inflate(inflate, inflate);
// Draw rect with bigger size, which is clipped by path
canvas.DrawRect(bounds, paint);
}
}
}
using (var paint = new SKPaint())
{
paint.IsAntialias = true;
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = lineWidth;
paint.Color = lineColor.ToSkia(opacity);
paint.StrokeCap = strokeCap.ToSkia();
paint.StrokeJoin = strokeJoin.ToSkia();
paint.StrokeMiter = strokeMiterLimit;
if (strokeStyle != PenStyle.Solid)
{
paint.PathEffect = strokeStyle.ToSkia(lineWidth, dashArray);
}
canvas.DrawPath(path, paint);
}
}
}
}