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Release canvas memory faster

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This commit is contained in:
ahocevar
2019-01-21 22:43:36 +01:00
parent b6d115d868
commit e37734826c
6 changed files with 31 additions and 13 deletions
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11
src/ol/render/canvas.js
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@@ -169,6 +169,17 @@ export const defaultLineWidth = 1;
export const labelCache = new LRUCache();
/**
* Prune the label cache.
*/
export function pruneLabelCache() {
while (labelCache.canExpireCache()) {
const canvas = labelCache.pop();
canvas.width = canvas.height = 0;
}
}
/**
* @type {!Object<string, number>}
*/

4
src/ol/render/canvas/TextBuilder.js
View File

@@ -6,7 +6,7 @@ import {asColorLike} from '../../colorlike.js';
import {intersects} from '../../extent.js';
import {matchingChunk} from '../../geom/flat/straightchunk.js';
import GeometryType from '../../geom/GeometryType.js';
import {labelCache, defaultTextAlign, defaultPadding, defaultLineCap, defaultLineDashOffset, defaultLineDash, defaultLineJoin, defaultFillStyle, checkFont, defaultFont, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline} from '../canvas.js';
import {pruneLabelCache, defaultTextAlign, defaultPadding, defaultLineCap, defaultLineDashOffset, defaultLineDash, defaultLineJoin, defaultFillStyle, checkFont, defaultFont, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline} from '../canvas.js';
import CanvasInstruction from './Instruction.js';
import CanvasBuilder from './Builder.js';
import TextPlacement from '../../style/TextPlacement.js';
@@ -131,7 +131,7 @@ class CanvasTextBuilder extends CanvasBuilder {
*/
this.strokeKey_ = '';
labelCache.prune();
pruneLabelCache();
}
/**