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Premptively load low resolution tiles

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This commit is contained in:
Tom Payne
2013-03-12 18:04:28 +01:00
parent e3abe376f1
commit 80df629319
6 changed files with 86 additions and 46 deletions
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9
src/ol/renderer/webgl/webgltilelayerrenderer.js
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@@ -285,7 +285,6 @@ ol.renderer.webgl.TileLayer.prototype.renderFrame =
var tileLayer = this.getTileLayer();
var tileSource = tileLayer.getTileSource();
var tileSourceKey = goog.getUid(tileSource).toString();
var tileGrid = tileSource.getTileGrid();
if (goog.isNull(tileGrid)) {
tileGrid = ol.tilegrid.getForProjection(projection);
@@ -394,11 +393,7 @@ ol.renderer.webgl.TileLayer.prototype.renderFrame =
tileCoord = new ol.TileCoord(z, x, y);
tile = tileSource.getTile(tileCoord, tileGrid, projection);
tileState = tile.getState();
if (tileState == ol.TileState.IDLE) {
this.updateWantedTiles(frameState.wantedTiles, tileSource, tileCoord);
tileCenter = tileGrid.getTileCoordCenter(tileCoord);
frameState.tileQueue.enqueue(tile, tileSourceKey, tileCenter);
} else if (tileState == ol.TileState.LOADED) {
if (tileState == ol.TileState.LOADED) {
if (mapRenderer.isTileTextureLoaded(tile)) {
tilesToDrawByZ[z][tileCoord.toString()] = tile;
continue;
@@ -466,6 +461,8 @@ ol.renderer.webgl.TileLayer.prototype.renderFrame =
}
this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);
this.manageTilePyramid(
frameState, tileSource, tileGrid, projection, extent, z);
this.scheduleExpireCache(frameState, tileSource);
goog.vec.Mat4.makeIdentity(this.texCoordMatrix_);