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IE8 fix for tileSources type: 'image'

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zakharov-aa 2016-09-28 09:40:28 +03:00 committed by GitHub
parent 254b426b2b
commit c5ad9b25bf
1 changed files with 11 additions and 4 deletions
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15
src/imagetilesource.js
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@ -73,6 +73,13 @@
}; };
/* IE8 fix for tileSources type: 'image' */
$.getNatural = function (DOMelement) {
var img = new Image();
img.src = DOMelement.src;
return { width: img.width, height: img.height };
};
$.extend($.ImageTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.ImageTileSource.prototype */{ $.extend($.ImageTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.ImageTileSource.prototype */{
/** /**
* Determine if the data and/or url imply the image service is supported by * Determine if the data and/or url imply the image service is supported by
@ -114,8 +121,8 @@
} }
$.addEvent(image, 'load', function () { $.addEvent(image, 'load', function () {
_this.width = image.naturalWidth; _this.width = $.getNatural(image).width;
_this.height = image.naturalHeight; _this.height = $.getNatural(image).height;
_this.aspectRatio = _this.width / _this.height; _this.aspectRatio = _this.width / _this.height;
_this.dimensions = new $.Point(_this.width, _this.height); _this.dimensions = new $.Point(_this.width, _this.height);
_this._tileWidth = _this.width; _this._tileWidth = _this.width;
@ -202,8 +209,8 @@
_buildLevels: function () { _buildLevels: function () {
var levels = [{ var levels = [{
url: this._image.src, url: this._image.src,
width: this._image.naturalWidth, width: $.getNatural(this._image).width,
height: this._image.naturalHeight height: $.getNatural(this._image).height
}]; }];
if (!this.buildPyramid || !$.supportsCanvas || !this.useCanvas) { if (!this.buildPyramid || !$.supportsCanvas || !this.useCanvas) {