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Add ol.dom.createCanvasContext2D function

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This commit is contained in:
Frederic Junod
2014-04-01 16:25:02 +02:00
parent 0b21c6bea7
commit 55de0a54b9
12 changed files with 63 additions and 118 deletions
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src/ol/source/zoomifysource.js
+6 -12
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@@ -2,12 +2,11 @@ goog.provide('ol.source.Zoomify');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.dom');
goog.require('goog.dom.TagName');
goog.require('ol.ImageTile');
goog.require('ol.TileCoord');
goog.require('ol.TileState');
goog.require('ol.TileUrlFunction');
goog.require('ol.dom');
goog.require('ol.proj');
goog.require('ol.source.TileImage');
goog.require('ol.tilegrid.Zoomify');
@@ -156,26 +155,21 @@ goog.inherits(ol.source.ZoomifyTile_, ol.ImageTile);
* @inheritDoc
*/
ol.source.ZoomifyTile_.prototype.getImage = function(opt_context) {
var tileSize = ol.DEFAULT_TILE_SIZE;
var key = goog.isDef(opt_context) ? goog.getUid(opt_context).toString() : '';
if (key in this.zoomifyImageByContext_) {
return this.zoomifyImageByContext_[key];
} else {
var image = goog.base(this, 'getImage', opt_context);
if (this.state == ol.TileState.LOADED) {
if (image.width == ol.DEFAULT_TILE_SIZE &&
image.height == ol.DEFAULT_TILE_SIZE) {
if (image.width == tileSize && image.height == tileSize) {
this.zoomifyImageByContext_[key] = image;
return image;
} else {
var canvas = /** @type {HTMLCanvasElement} */
(goog.dom.createElement(goog.dom.TagName.CANVAS));
canvas.width = ol.DEFAULT_TILE_SIZE;
canvas.height = ol.DEFAULT_TILE_SIZE;
var context = /** @type {CanvasRenderingContext2D} */
(canvas.getContext('2d'));
var context = ol.dom.createCanvasContext2D(tileSize, tileSize);
context.drawImage(image, 0, 0);
this.zoomifyImageByContext_[key] = canvas;
return canvas;
this.zoomifyImageByContext_[key] = context.canvas;
return context.canvas;
}
} else {
return image;