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Throw sensible error on for empty canvas #3150

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Merged
merged 1 commit into from
May 3, 2021
Merged

Throw sensible error on for empty canvas #3150

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8 changes: 8 additions & 0 deletions src/modules/addimage.js
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Original file line number Diff line number Diff line change
Expand Up @@ -381,6 +381,14 @@ import { atob, btoa } from "../libs/AtobBtoa.js";
}

if (element.nodeName === "CANVAS") {
if (element.width === 0 || element.height === 0) {
throw new Error(
"Given canvas must have data. Canvas width: " +
element.width +
", height: " +
element.height
);
}
var mimeType;
switch (format) {
case "PNG":
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13 changes: 13 additions & 0 deletions test/specs/addimage.spec.js
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