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Make tile pre-loading a per-layer option

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This commit is contained in:
Tom Payne
2013-03-27 13:55:14 +01:00
parent 1d22d2fdde
commit 494d61250e
7 changed files with 61 additions and 17 deletions
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14
src/ol/renderer/layerrenderer.js
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@@ -17,12 +17,6 @@ goog.require('ol.layer.LayerState');
goog.require('ol.source.TileSource');
/**
* @define {boolean} Preemptively load low resolution tiles.
*/
ol.PREEMPTIVELY_LOAD_LOW_RESOLUTION_TILES = true;
/**
* @constructor
@@ -297,13 +291,15 @@ ol.renderer.Layer.prototype.snapCenterToPixel =
* @param {ol.Projection} projection Projection.
* @param {ol.Extent} extent Extent.
* @param {number} currentZ Current Z.
* @param {boolean} preload Preload low resolution tiles.
* @param {function(this: T, ol.Tile)=} opt_tileCallback Tile callback.
* @param {T=} opt_obj Object.
* @protected
* @template T
*/
ol.renderer.Layer.prototype.manageTilePyramid = function(frameState, tileSource,
tileGrid, projection, extent, currentZ, opt_tileCallback, opt_obj) {
ol.renderer.Layer.prototype.manageTilePyramid = function(
frameState, tileSource, tileGrid, projection, extent, currentZ, preload,
opt_tileCallback, opt_obj) {
var tileSourceKey = goog.getUid(tileSource).toString();
if (!(tileSourceKey in frameState.wantedTiles)) {
frameState.wantedTiles[tileSourceKey] = {};
@@ -317,7 +313,7 @@ ol.renderer.Layer.prototype.manageTilePyramid = function(frameState, tileSource,
tileResolution = tileGrid.getResolution(z);
for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
if (ol.PREEMPTIVELY_LOAD_LOW_RESOLUTION_TILES || z == currentZ) {
if (preload || z == currentZ) {
tile = tileSource.getTile(z, x, y, tileGrid, projection);
if (tile.getState() == ol.TileState.IDLE) {
wantedTiles[tile.tileCoord.toString()] = true;