LayoutTests/compositing/hidpi-absolute-subpixel-positioned-transformed-elements.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <title>This tests that applying rotation on a subpixel (absolute)positioned box does not change its position/size.</title>
 <head>
 <style>
   div {
     background: green;
     width: 9px;
     height: 9px;
     position: absolute;
   }
 </style>
 </head>
 <body>
 <p id="container"></p>
 <script>
   var container = document.getElementById("container");
   adjustment = 0.1;
   for (i = 0; i < 10; ++i) {
     adjustment+=0.1;
     for (j = 0; j < 10; ++j) {
       var e = document.createElement("div");
       e.style.top = (11 * i + j * adjustment) + "px";
       e.style.left = (11 * j + i * adjustment) + "px";
       container.appendChild(e);
     }
   }

   function rotate() {
      divs = document.getElementsByTagName("div");
      for (i = 0; i < divs.length; ++i)
        divs[i].style.webkitTransform = "rotate(90deg)";

     if (window.testRunner)
         testRunner.notifyDone();
   }

   if (window.testRunner)
     testRunner.waitUntilDone();

   setTimeout(rotate, 0);
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>This tests that applying rotation on a subpixel (absolute)positioned box does not change its position/size.</title>
	<head>
	<style>
	div {
	background: green;
	width: 9px;
	height: 9px;
	position: absolute;
	}
	</style>
	</head>
	<body>
	<p id="container"></p>
	<script>
	var container = document.getElementById("container");
	adjustment = 0.1;
	for (i = 0; i < 10; ++i) {
	adjustment+=0.1;
	for (j = 0; j < 10; ++j) {
	var e = document.createElement("div");
	e.style.top = (11 * i + j * adjustment) + "px";
	e.style.left = (11 * j + i * adjustment) + "px";
	container.appendChild(e);
	}
	}

	function rotate() {
	divs = document.getElementsByTagName("div");
	for (i = 0; i < divs.length; ++i)
	divs[i].style.webkitTransform = "rotate(90deg)";

	if (window.testRunner)
	testRunner.notifyDone();
	}

	if (window.testRunner)
	testRunner.waitUntilDone();

	setTimeout(rotate, 0);
	</script>
	</body>
	</html>