LayerCache

Defined in: render/LayerCache.ts:19

Caches layer rendering to offscreen canvases so static content does not need to be redrawn every frame. Only dirty layers are redrawn.

Constructors

Constructor

new LayerCache(scale?): LayerCache

Defined in: render/LayerCache.ts:23

Parameters

scale?

number = 1

Returns

LayerCache

Accessors

size

Get Signature

get size(): number

Defined in: render/LayerCache.ts:56

Get the number of cached layers.

Returns

number

Methods

clear()

clear(): void

Defined in: render/LayerCache.ts:222

Clear the cache.

Returns

void

---

getLayer()

getLayer(layer): CachedLayer | null

Defined in: render/LayerCache.ts:65

Get a cached rendering for a layer. If the layer is dirty or not cached, it is re-rendered. Returns null if the layer has no visible parts.

Parameters

layer

Layer

Returns

CachedLayer | null

---

getScale()

getScale(): number

Defined in: render/LayerCache.ts:34

Get the current scale.

Returns

number

---

isDirty()

isDirty(layerName): boolean

Defined in: render/LayerCache.ts:51

Check if a layer is dirty.

Parameters

layerName

string

Returns

boolean

---

markAllDirty()

markAllDirty(): void

Defined in: render/LayerCache.ts:44

Mark all layers as dirty.

Returns

void

---

markDirty()

markDirty(layerName): void

Defined in: render/LayerCache.ts:39

Mark a layer as dirty (needs redraw).

Parameters

layerName

string

Returns

void

---

removeLayer()

removeLayer(name): void

Defined in: render/LayerCache.ts:228

Remove a specific layer from the cache.

Parameters

name

string

Returns

void

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setScale()

setScale(scale): void

Defined in: render/LayerCache.ts:26

Set the device scale for cached rendering.

Parameters

scale

number

Returns

void