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[ol.layer.TileLayer] move getData from layer.XYZ to layer.TileLayer

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This commit is contained in:
Éric Lemoine
2012-06-22 11:08:50 +02:00
parent 0b06267afe
commit 86a3eaad19
4 changed files with 247 additions and 235 deletions
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95
src/ol/layer/TileLayer.js
View File

@@ -10,6 +10,12 @@ goog.require('ol.TileCache');
*/
ol.layer.TileLayer = function() {
/**
* @private
* @type {string|undefined}
*/
this.url_ = undefined;
/**
* @protected
* @type {ol.Projection}
@@ -161,6 +167,14 @@ ol.layer.TileLayer.prototype.getResolutions = function() {
return this.resolutions_;
};
/**
* Set the layer URL.
* @param {string} url
*/
ol.layer.TileLayer.prototype.setUrl = function(url) {
this.url_ = url;
};
/**
* Set layer projection.
* @param {ol.Projection} projection
@@ -233,3 +247,84 @@ ol.layer.TileLayer.prototype.getTile = function(url, bounds) {
}
return tile;
};
/**
* Get data from the layer. This is the layer's main API function.
* @param {ol.Bounds} bounds
* @param {number} resolution
*/
ol.layer.TileLayer.prototype.getData = function(bounds, resolution) {
var me = this,
zoomAndRes = me.getZoomAndRes(resolution),
zoom = zoomAndRes[0];
resolution = zoomAndRes[1];
// define some values used for the actual tiling
var boundsMinX = bounds.getMinX(),
boundsMaxX = bounds.getMaxX(),
boundsMinY = bounds.getMinY(),
boundsMaxY = bounds.getMaxY(),
tileWidth = me.tileWidth_,
tileHeight = me.tileHeight_,
tileOrigin = me.getTileOrigin(),
tileOriginX = tileOrigin[0],
tileOriginY = tileOrigin[1],
tileWidthGeo = tileWidth * resolution,
tileHeightGeo = tileHeight * resolution,
offsetX = Math.floor(
(boundsMinX - tileOriginX) / tileWidthGeo),
offsetY = Math.floor(
(tileOriginY - boundsMaxY) / tileHeightGeo),
gridLeft = tileOriginX + tileWidthGeo * offsetX,
gridTop = tileOriginY - tileHeightGeo * offsetY;
// now tile
var tiles = [],
tile,
url,
tileBottom, tileRight, tileBounds;
for (var y=0, tileTop=gridTop; tileTop > boundsMinY;
++y, tileTop-=tileHeightGeo) {
tiles[y] = [];
tileBottom = tileTop - tileHeightGeo;
for (var x=0, tileLeft=gridLeft; tileLeft < boundsMaxX;
++x, tileLeft+=tileWidthGeo) {
tileRight = tileLeft + tileWidthGeo;
tileBounds = new ol.Bounds(tileLeft, tileBottom,
tileRight, tileTop, this.projection_);
url = me.url_.replace('{x}', offsetX + x + '')
.replace('{y}', offsetY + y + '')
.replace('{z}', zoom + '');
tile = this.getTile(url, tileBounds);
tiles[y][x] = tile;
}
}
return new ol.TileSet(tiles, tileWidth, tileHeight, resolution);
};
/**
* Get the zoom level (z) and layer resolution for the given resolution.
* @param {number} resolution
* @return {Array.<number>}
*/
ol.layer.TileLayer.prototype.getZoomAndRes = function(resolution) {
var delta = Number.POSITIVE_INFINITY,
currentDelta,
resolutions = this.getResolutions(),
zoom;
for (var i=resolutions.length-1; i>=0; --i) {
currentDelta = Math.abs(resolutions[i] - resolution);
if (currentDelta > delta) {
break;
}
delta = currentDelta;
}
zoom = i + 1;
return [zoom, resolutions[zoom]];
};

87
src/ol/layer/XYZ.js
View File

@@ -15,96 +15,11 @@ goog.require('ol.TileSet');
*/
ol.layer.XYZ = function(url) {
/**
* @private
* @type {string}
*/
this.url_ = url;
goog.base(this);
this.setUrl(url);
this.setMaxResolution(156543.03390625);
};
goog.inherits(ol.layer.XYZ, ol.layer.TileLayer);
/**
* Get data from the layer. This is the layer's main API function.
* @param {ol.Bounds} bounds
* @param {number} resolution
*/
ol.layer.XYZ.prototype.getData = function(bounds, resolution) {
var me = this,
zoomAndRes = me.getZoomAndRes(resolution),
zoom = zoomAndRes[0];
resolution = zoomAndRes[1];
// define some values used for the actual tiling
var boundsMinX = bounds.getMinX(),
boundsMaxX = bounds.getMaxX(),
boundsMinY = bounds.getMinY(),
boundsMaxY = bounds.getMaxY(),
tileWidth = me.tileWidth_,
tileHeight = me.tileHeight_,
tileOrigin = me.getTileOrigin(),
tileOriginX = tileOrigin[0],
tileOriginY = tileOrigin[1],
tileWidthGeo = tileWidth * resolution,
tileHeightGeo = tileHeight * resolution,
offsetX = Math.floor(
(boundsMinX - tileOriginX) / tileWidthGeo),
offsetY = Math.floor(
(tileOriginY - boundsMaxY) / tileHeightGeo),
gridLeft = tileOriginX + tileWidthGeo * offsetX,
gridTop = tileOriginY - tileHeightGeo * offsetY;
// now tile
var tiles = [],
tile,
url,
tileBottom, tileRight, tileBounds;
for (var y=0, tileTop=gridTop; tileTop > boundsMinY;
++y, tileTop-=tileHeightGeo) {
tiles[y] = [];
tileBottom = tileTop - tileHeightGeo;
for (var x=0, tileLeft=gridLeft; tileLeft < boundsMaxX;
++x, tileLeft+=tileWidthGeo) {
tileRight = tileLeft + tileWidthGeo;
tileBounds = new ol.Bounds(tileLeft, tileBottom,
tileRight, tileTop, this.projection_);
url = me.url_.replace('{x}', offsetX + x + '')
.replace('{y}', offsetY + y + '')
.replace('{z}', zoom + '');
tile = this.getTile(url, tileBounds);
tiles[y][x] = tile;
}
}
return new ol.TileSet(tiles, tileWidth, tileHeight, resolution);
};
/**
* Get the zoom level (z) and layer resolution for the given resolution.
* @param {number} resolution
* @return {Array.<number>}
*/
ol.layer.XYZ.prototype.getZoomAndRes = function(resolution) {
var delta = Number.POSITIVE_INFINITY,
currentDelta,
resolutions = this.getResolutions(),
zoom;
for (var i=resolutions.length-1; i>=0; --i) {
currentDelta = Math.abs(resolutions[i] - resolution);
if (currentDelta > delta) {
break;
}
delta = currentDelta;
}
zoom = i + 1;
return [zoom, resolutions[zoom]];
};