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Merge branch 'master' of github.com:openseadragon/openseadragon

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This commit is contained in:
Ian Gilman 2016-10-10 17:09:28 -07:00
commit bcd093e3e6
1 changed files with 18 additions and 0 deletions
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18
src/drawer.js
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@ -423,6 +423,24 @@ $.Drawer.prototype = {
this.context.globalCompositeOperation = compositeOperation;
}
if (bounds) {
// Internet Explorer and Microsoft Edge throw IndexSizeError
// when you call context.drawImage with negative x or y
// or width or height greater than the canvas width or height respectively
if (bounds.x < 0) {
bounds.width += bounds.x;
bounds.x = 0;
}
if (bounds.width > this.canvas.width) {
bounds.width = this.canvas.width;
}
if (bounds.y < 0) {
bounds.height += bounds.y;
bounds.y = 0;
}
if (bounds.height > this.canvas.height) {
bounds.height = this.canvas.height;
}
this.context.drawImage(
this.sketchCanvas,
bounds.x,