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Give preloaded lower resolution tiles a chance to display immediately

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This commit is contained in:
Andreas Hocevar
2017-06-29 00:02:24 +02:00
parent 36c80f61bc
commit 970265acb0
1 changed files with 8 additions and 3 deletions
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11
src/ol/renderer/canvas/tilelayer.js
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@@ -144,9 +144,14 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame = function(frameState, layer
for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
tile = tileSource.getTile(z, x, y, pixelRatio, projection);
// When useInterimTilesOnError is false, we consider the error tile as loaded.
if (tile.getState() == ol.TileState.ERROR && !this.getLayer().getUseInterimTilesOnError()) {
tile.setState(ol.TileState.LOADED);
if (tile.getState() == ol.TileState.ERROR) {
if (!tileLayer.getUseInterimTilesOnError()) {
// When useInterimTilesOnError is false, we consider the error tile as loaded.
tile.setState(ol.TileState.LOADED);
} else if (tileLayer.getPreload() > 0) {
// Preloaded tiles for lower resolutions might have finished loading.
newTiles = true;
}
}
if (!this.isDrawableTile_(tile)) {
tile = tile.getInterimTile();