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Grow cache size dynamically

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This commit is contained in:
Andreas Hocevar
2020-07-11 11:30:01 +02:00
parent 5cd102af10
commit 0167c2760e
15 changed files with 40 additions and 21 deletions
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21
src/ol/source/Tile.js
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@@ -75,19 +75,12 @@ class TileSource extends Source {
if (tileGrid) {
toSize(tileGrid.getTileSize(tileGrid.getMinZoom()), tileSize);
}
const canUseScreen = typeof screen !== 'undefined';
const width = canUseScreen ? screen.availWidth || screen.width : 1920;
const height = canUseScreen ? screen.availHeight || screen.height : 1080;
const minCacheSize =
4 * Math.ceil(width / tileSize[0]) * Math.ceil(height / tileSize[1]);
/**
* @protected
* @type {import("../TileCache.js").default}
*/
this.tileCache = new TileCache(
Math.max(minCacheSize, options.cacheSize || 0)
);
this.tileCache = new TileCache(options.cacheSize || 0);
/**
* @protected
@@ -325,6 +318,18 @@ class TileSource extends Source {
super.refresh();
}
/**
* Increases the cache size if needed
* @param {number} tileCount Minimum number of tiles needed.
* @param {import("../proj/Projection.js").default} projection Projection.
*/
updateCacheSize(tileCount, projection) {
const tileCache = this.getTileCacheForProjection(projection);
if (tileCount > tileCache.highWaterMark) {
tileCache.highWaterMark = tileCount;
}
}
/**
* Marks a tile coord as being used, without triggering a load.
* @abstract