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Always create a new blank image to avoid CSP violations

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This commit is contained in:
Andreas Hocevar
2017-10-09 12:46:34 +02:00
parent a5a0f5b98b
commit 590dd6f1cf
1 changed files with 7 additions and 7 deletions
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14
src/ol/imagetile.js
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@@ -61,7 +61,7 @@ ol.inherits(ol.ImageTile, ol.Tile);
ol.ImageTile.prototype.disposeInternal = function() {
if (this.state == ol.TileState.LOADING) {
this.unlistenImage_();
this.image_.src = ol.ImageTile.blankImageUrl;
this.image_ = ol.ImageTile.getBlankImage();
}
if (this.interimTile) {
this.interimTile.dispose();
@@ -98,7 +98,7 @@ ol.ImageTile.prototype.getKey = function() {
ol.ImageTile.prototype.handleImageError_ = function() {
this.state = ol.TileState.ERROR;
this.unlistenImage_();
this.image_.src = ol.ImageTile.blankImageUrl;
this.image_ = ol.ImageTile.getBlankImage();
this.changed();
};
@@ -150,12 +150,12 @@ ol.ImageTile.prototype.unlistenImage_ = function() {
/**
* Data URI for a blank image.
* @type {string}
* Get a 1-pixel blank image.
* @return {HTMLCanvasElement} Blank image.
*/
ol.ImageTile.blankImageUrl = (function() {
ol.ImageTile.getBlankImage = function() {
var ctx = ol.dom.createCanvasContext2D(1, 1);
ctx.fillStyle = 'rgba(0,0,0,0)';
ctx.fillRect(0, 0, 1, 1);
return ctx.canvas.toDataURL('image/png');
})();
return ctx.canvas;
};