<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.container {
width: 60px;
height: 60px;
margin: 5px;
}
canvas {
background-color: green;
}
#canvas-simple {}
#canvas-padding { padding: 5px; }
#canvas-border { border: 5px solid; }
#canvas-image { background-image: url("../resources/simple_image.png"); }
#canvas-transparent-background { background-color: rgba(0, 255, 0, 0.5); }
</style>
<script>
if (window.testRunner) {
testRunner.dumpAsText();
}
function drawCanvas(canvasID) {
var canvas = document.getElementById(canvasID);
var gl = canvas.getContext("webgl");
gl.clearColor(0, 0, 0, 0);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
};
function doTest() {
// Simple background can be direct-composited with content-layer.
// The container GraphicsLayer does not paint anything.
drawCanvas('canvas-simple');
// Padding makes the background-box bigger than content-box.
// The container GraphicsLayer needs to paint background.
drawCanvas('canvas-padding');
// Content layer cannot direct-composite any kind of box decoration.
// The container GraphicsLayer needs to paint box decorations.
drawCanvas('canvas-border');
// Content layer cannot direct-composite background image.
// The container GraphicsLayer needs to paint background image.
drawCanvas('canvas-image');
// Simple background can be direct-composited with content-layer.
// The container GraphicsLayer does not paint anything.
// The container Graphics layer must not be treated as opaque
drawCanvas('canvas-transparent-background');
if (window.testRunner && window.internals)
document.getElementById('layer-tree').innerText = internals.layerTreeAsText(document);
};
window.addEventListener('load', doTest, false);
</script>
</head>
<body>
<div class="container">
<canvas id="canvas-simple" width="50" height="50"></canvas>
</div>
<div class="container">
<canvas id="canvas-padding" width="50" height="50"></canvas>
</div>
<div class="container">
<canvas id="canvas-border" width="50" height="50"></canvas>
</div>
<div class="container">
<canvas id="canvas-image" width="50" height="50"></canvas>
</div>
<div class="container">
<canvas id="canvas-transparent-background" width="50" height="50"></canvas>
</div>
<pre id="layer-tree"></pre>
</body>
</html>
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