LayoutTests/compositing/canvas/accelerated-canvas-compositing-size-limit.html - WebKit - Git at Google

 <!DOCTYPE html><html>
 <head>
 <style>
 canvas {
     -webkit-transform: translateZ(0);
 }
 </style>
 <script>
     if (window.testRunner) {
       testRunner.dumpAsText();
       testRunner.waitUntilDone();
     }

     function doTest() {
         var canvases = document.getElementsByTagName("canvas");
         for (var i = 0; i < canvases.length; ++i) {
             var c = canvases[i];
             var ctx = c.getContext('2d');
             if (!ctx)
                 continue;
             ctx.fillStyle = 'rgba(255,0,0,1)';
             ctx.fillRect(0,0,c.width, c.height);
         }
         if (window.testRunner) {
             document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_ACCELERATES_DRAWING);
             testRunner.notifyDone();
         }
     }

     window.addEventListener('load', doTest, false);
 </script>
 </head>
 <body>
 <p>Verifies that 2D canvases with higher than 5120x2880 resolution don't create accelerated backing stores.</p>
 <canvas id="c1" width="512" height="288"></canvas>
 <canvas id="c2" width="5120" height="2880"></canvas>
 <canvas id="c3" width="5200" height="2900"></canvas>
 <pre id="layers">Layer tree goes here in DRT</pre>
 </body>
 </html>
	<!DOCTYPE html><html>
	<head>
	<style>
	canvas {
	-webkit-transform: translateZ(0);
	}
	</style>
	<script>
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	function doTest() {
	var canvases = document.getElementsByTagName("canvas");
	for (var i = 0; i < canvases.length; ++i) {
	var c = canvases[i];
	var ctx = c.getContext('2d');
	if (!ctx)
	continue;
	ctx.fillStyle = 'rgba(255,0,0,1)';
	ctx.fillRect(0,0,c.width, c.height);
	}
	if (window.testRunner) {
	document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_ACCELERATES_DRAWING);
	testRunner.notifyDone();
	}
	}

	window.addEventListener('load', doTest, false);
	</script>
	</head>
	<body>
	<p>Verifies that 2D canvases with higher than 5120x2880 resolution don't create accelerated backing stores.</p>
	<canvas id="c1" width="512" height="288"></canvas>
	<canvas id="c2" width="5120" height="2880"></canvas>
	<canvas id="c3" width="5200" height="2900"></canvas>
	<pre id="layers">Layer tree goes here in DRT</pre>
	</body>
	</html>