gecko-dev/browser/devtools/eyedropper/eyedropper-child.js

21 lines
751 B
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
addMessageListener("Eyedropper:RequestContentScreenshot", sendContentScreenshot);
function sendContentScreenshot() {
let canvas = content.document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
let width = content.innerWidth;
let height = content.innerHeight;
canvas.width = width;
canvas.height = height;
canvas.mozOpaque = true;
let ctx = canvas.getContext("2d");
ctx.drawWindow(content, content.scrollX, content.scrollY, width, height, "#fff");
sendAsyncMessage("Eyedropper:Screenshot", canvas.toDataURL());
}