Class RenderController

Inheritance
object
RenderController
Implements
Inherited Members
Namespace: Mapsui.Rendering
Assembly: Mapsui.UI.Android.dll
Syntax
public sealed class RenderController : IDisposable

Constructors

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RenderController(Func<Map?>, Action)

Declaration
public RenderController(Func<Map?> getMap, Action InvalidateCanvas)
Parameters
Type Name Description
Func<Map> getMap
Action InvalidateCanvas

Methods

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Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

Declaration
public void Dispose()
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GetMapInfo(ScreenPosition, Viewport, IEnumerable<ILayer>, RenderService, int)

Declaration
public MapInfo GetMapInfo(ScreenPosition screenPosition, Viewport viewport, IEnumerable<ILayer> layers, RenderService renderService, int margin = 0)
Parameters
Type Name Description
ScreenPosition screenPosition
Viewport viewport
IEnumerable<ILayer> layers
RenderService renderService
int margin
Returns
Type Description
MapInfo
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RefreshGraphics()

Signals that the entire viewport needs to be redrawn on the next render cycle.

Declaration
public void RefreshGraphics()
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RefreshGraphics(RefreshRequest?)

Signals that only the given region needs to be redrawn. Multiple calls before the next render are accumulated. If a full refresh is already pending, the incoming request is ignored.

Declaration
public void RefreshGraphics(RefreshRequest? request)
Parameters
Type Name Description
RefreshRequest request

The refresh request, or null to force a full refresh.
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Render(object)

Renders the map to the given canvas without applying any pixel density scaling. Use this overload from platforms that apply DPI scaling before providing the canvas (e.g. Avalonia), or from callers that have already scaled the canvas.

Declaration
public void Render(object canvas)
Parameters
Type Name Description
object canvas
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Render(object, float?)

Renders the map to the given canvas, applying the supplied pixel density scaling first. If pixelDensity is null the view is not yet laid out; the render is skipped but the invalidation loop is still unblocked so it can retry later.

Declaration
public void Render(object canvas, float? pixelDensity)
Parameters
Type Name Description
object canvas
float? pixelDensity
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RenderToBitmapStream(Viewport, IEnumerable<ILayer>, RenderService, Color?, float, IEnumerable<IWidget>?, RenderFormat, int)

Declaration
public MemoryStream RenderToBitmapStream(Viewport viewport, IEnumerable<ILayer> layers, RenderService renderService, Color? background = null, float pixelDensity = 1, IEnumerable<IWidget>? widgets = null, RenderFormat renderFormat = RenderFormat.Png, int quality = 100)
Parameters
Type Name Description
Viewport viewport
IEnumerable<ILayer> layers
RenderService renderService
Color? background
float pixelDensity
IEnumerable<IWidget> widgets
RenderFormat renderFormat
int quality
Returns
Type Description
MemoryStream
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SetMapRenderer(IMapRenderer)

Declaration
public void SetMapRenderer(IMapRenderer mapRenderer)
Parameters
Type Name Description
IMapRenderer mapRenderer
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SetupDrawableFactory(RenderService)

Sets up the drawable factory on the RenderService. This wires the renderer's CreateDrawableForFeature(Viewport, ILayer, IFeature, IStyle, RenderService) method to the CreateDrawable delegate, enabling the fetch pipeline to create drawables without direct access to the renderer.

Declaration
public void SetupDrawableFactory(RenderService renderService)
Parameters
Type Name Description
RenderService renderService

The render service to configure.
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UpdateDrawables(Viewport, ILayer, RenderService)

Delegates to the map renderer's UpdateDrawables to create pre-rendered objects. Called when layer data changes.

Declaration
public void UpdateDrawables(Viewport viewport, ILayer layer, RenderService renderService)
Parameters
Type Name Description
Viewport viewport
ILayer layer
RenderService renderService

Implements

Extension Methods