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Tile grid and cache for one resolution only

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This commit is contained in:
ahocevar
2013-06-21 18:53:15 +02:00
parent 89c23b5560
commit f20e6002cc
1 changed files with 5 additions and 28 deletions
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33
src/ol/renderer/canvas/canvasvectorlayerrenderer.js
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@@ -316,20 +316,16 @@ ol.renderer.canvas.VectorLayer.prototype.renderFrame =
if (!frameState.viewHints[ol.ViewHint.ANIMATING] &&
!frameState.viewHints[ol.ViewHint.INTERACTING]) {
// avoid rendering issues for very high zoom levels
var newResolution = Math.max(resolution, ol.renderer.canvas.MIN_RESOLUTION);
var oldResolutions = goog.isNull(this.tileGrid_) ? [] :
this.tileGrid_.getResolutions();
if (!goog.array.contains(oldResolutions, newResolution)) {
var newResolutions = oldResolutions.concat([]);
goog.array.binaryInsert(newResolutions, newResolution,
function(a, b) { return b - a; });
var gridResolution = Math.max(resolution,
ol.renderer.canvas.MIN_RESOLUTION);
if (gridResolution !== this.renderedResolution_) {
tileGrid = new ol.tilegrid.TileGrid({
origin: [0, 0],
projection: view2DState.projection,
resolutions: newResolutions,
resolutions: [gridResolution],
tileSize: [512, 512]
});
this.updateTileCache_(oldResolutions, newResolutions);
this.tileCache_.clear();
this.tileGrid_ = tileGrid;
}
}
@@ -531,25 +527,6 @@ ol.renderer.canvas.VectorLayer.prototype.pruneTileCache_ = function() {
};
/**
* @private
* @param {Array.<number>} oldResolutions Resolutions of the old tile grid.
* @param {Array.<number>} newResolutions Resolutions of the new tile grid.
*/
ol.renderer.canvas.VectorLayer.prototype.updateTileCache_ =
function(oldResolutions, newResolutions) {
var keys = this.tileCache_.getKeys(),
tileCoord, key, i;
for (i = keys.length - 1; i >= 0; --i) {
key = keys[i];
tileCoord = ol.TileCoord.createFromString(key);
tileCoord.z = goog.array.indexOf(newResolutions,
oldResolutions[tileCoord.z]);
this.tileCache_.set(tileCoord.toString(), this.tileCache_.pop());
}
};
/**
* @type {number}
*/