Interface IDrawableStyleRenderer

A style renderer that supports the two-step drawable architecture:

  1. CreateDrawables: Creates platform-specific drawable objects (can run on a background thread).
  2. DrawDrawable: Draws a pre-created drawable to the canvas (runs on the UI thread, should be fast).
Namespace: Mapsui.Rendering
Assembly: Mapsui.dll
Syntax
public interface IDrawableStyleRenderer : IStyleRenderer

Methods

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CreateDrawables(Viewport, ILayer, IFeature, IStyle, RenderService)

Creates drawable objects for the given feature and style. This method does the heavy work of creating platform-specific rendering objects (e.g. SKPath, SKPaint) and can be called on a background thread.

Declaration
IReadOnlyList<IDrawable> CreateDrawables(Viewport viewport, ILayer layer, IFeature feature, IStyle style, RenderService renderService)
Parameters
Type Name Description
Viewport viewport

The viewport at the time of creation (used for world coordinate extraction).
ILayer layer

The layer containing the feature.
IFeature feature

The feature to create drawables for.
IStyle style

The style to apply.
RenderService renderService

The render service for cache access.
Returns
Type Description
IReadOnlyList<IDrawable>

A list of drawables representing the feature with the given style.
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DrawDrawable(object, Viewport, IDrawable, ILayer)

Draws a pre-created drawable to the canvas. This should be a fast operation that only applies viewport transforms and calls canvas draw methods.

Declaration
void DrawDrawable(object canvas, Viewport viewport, IDrawable drawable, ILayer layer)
Parameters
Type Name Description
object canvas

The platform-specific canvas (e.g. SKCanvas).
Viewport viewport

The current viewport (for world-to-screen transform).
IDrawable drawable

The drawable to draw.
ILayer layer

The layer containing the feature (for opacity).

Extension Methods