public MapRenderer()
{
StyleRenderers[typeof(RasterStyle)] = new RasterStyleRenderer();
StyleRenderers[typeof(VectorStyle)] = new VectorStyleRenderer();
StyleRenderers[typeof(LabelStyle)] = new LabelStyleRenderer();
StyleRenderers[typeof(SymbolStyle)] = new SymbolStyleRenderer();
StyleRenderers[typeof(CalloutStyle)] = new CalloutStyleRenderer();
WidgetRenders[typeof(Hyperlink)] = new HyperlinkWidgetRenderer();
WidgetRenders[typeof(ScaleBarWidget)] = new ScaleBarWidgetRenderer();
WidgetRenders[typeof(ZoomInOutWidget)] = new ZoomInOutWidgetRenderer();
WidgetRenders[typeof(ButtonWidget)] = new ButtonWidgetRenderer();
}
public bool Draw(SKCanvas canvas, IReadOnlyViewport viewport, ILayer layer, IFeature feature, IStyle style, ISymbolCache symbolCache, long iteration)
{
try
{
var vectorStyle = (VectorStyle)style;
var opacity = (float)(layer.Opacity * style.Opacity);
switch (feature)
{
case RectFeature rectFeature:
PolygonRenderer.Draw(canvas, viewport, vectorStyle, rectFeature, rectFeature.Rect.ToPolygon(), opacity);
break;
case PointFeature pointFeature:
SymbolStyleRenderer.DrawSymbol(canvas, viewport, layer, pointFeature.Point.X, pointFeature.Point.Y, new SymbolStyle { Outline = vectorStyle.Outline, Fill = vectorStyle.Fill, Line = vectorStyle.Line });
break;
case GeometryFeature geometryFeature:
switch (geometryFeature.Geometry)
{
case GeometryCollection collection:
for (var i = 0; i < collection.NumGeometries; i++)
Draw(canvas, viewport, layer, new GeometryFeature(collection.GetGeometryN(i)), style, symbolCache, iteration);
break;
case Point point:
Draw(canvas, viewport, layer, new PointFeature(point.X, point.Y), style, symbolCache, iteration);
break;
case Polygon polygon:
PolygonRenderer.Draw(canvas, viewport, vectorStyle, feature, polygon, opacity, symbolCache);
break;
case LineString lineString:
LineStringRenderer.Draw(canvas, viewport, vectorStyle, lineString, opacity);
break;
default:
throw new ArgumentException("Unknown geometry of Feature");
}
break;
}
}
catch (Exception ex)
{
Logger.Log(LogLevel.Error, ex.Message, ex);
}
return true;
}
public static void Draw(SKCanvas canvas, IReadOnlyViewport viewport, IStyle style, IFeature feature,
IGeometry geometry, SymbolCache symbolCache, float opacity)
{
var point = geometry as Point;
var destination = viewport.WorldToScreen(point);
if (style is CalloutStyle calloutStyle)
{
CalloutStyleRenderer.Draw(canvas, viewport, symbolCache, opacity, destination, calloutStyle);
}
else if (style is LabelStyle labelStyle)
{
LabelRenderer.Draw(canvas, labelStyle, feature, destination, opacity);
}
else if (style is SymbolStyle symbolStyle)
{
if (symbolStyle.BitmapId >= 0)
{
// todo: Remove this call. ImageStyle should be used instead of SymbolStyle with BitmapId
ImageStyleRenderer.Draw(canvas, symbolStyle, destination, symbolCache, opacity, viewport.Rotation);
}
else
{
SymbolStyleRenderer.Draw(canvas, symbolStyle, destination, opacity, symbolStyle.SymbolType, viewport.Rotation);
}
}
else if (style is ImageStyle imageStyle)
{
ImageStyleRenderer.Draw(canvas, imageStyle, destination, symbolCache, opacity, viewport.Rotation);
}
else if (style is VectorStyle vectorStyle)
{
// Use the SymbolStyleRenderer and specify Ellipse
SymbolStyleRenderer.Draw(canvas, vectorStyle, destination, opacity, SymbolType.Ellipse);
}
else
{
throw new Exception($"Style of type '{style.GetType()}' is not supported for points");
}
}