Create a screenshot in Kha (only HTML5)

Screenshot.hx

// Ported from https://github.com/BabylonJS/Babylon.js/blob/master/src/Tools/babylon.tools.ts

// Don't seems to work in KodeStudio, only in a browser.
// It creates a new window with the image. If you can't save the image, try to right click in the image
// and choose to open in a new tab.

#if js
package;

import js.html.Window;
import js.html.CanvasElement;
import js.html.ImageElement;

class Screenshot
{
	public static function create(mimeType:String = 'image/png'):Void
	{		
		var canvas = kha.SystemImpl.khanvas;

		var screenshotCanvas:CanvasElement = cast js.Browser.document.createElement('canvas');
		screenshotCanvas.width = canvas.width;
		screenshotCanvas.height = canvas.height;

		var renderContext = screenshotCanvas.getContext('2d');		
		renderContext.drawImage(canvas, 0, 0, canvas.width, canvas.height);

		var base64Image = screenshotCanvas.toDataURL(mimeType);

		var newWindow = js.Browser.window.open(null, '_blank');
		adjustWindow(newWindow);

		var img:ImageElement = cast newWindow.document.createElement('img');
		img.src = base64Image;
		newWindow.document.body.appendChild(img);
	}

	static function adjustWindow(window:Window):Void
	{
		window.document.body.style.margin = '0px';
		window.document.body.style.padding = '0px';
		window.document.body.style.height = '100%';
		window.document.body.style.overflow = 'hidden';		
		window.document.documentElement.style.margin = '0px';
		window.document.documentElement.style.padding = '0px';
		window.document.documentElement.style.height = '100%';
		window.document.documentElement.style.overflow = 'hidden';
	}
}
#end