<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Checking for simple image layer optimisation</title>
<style type="text/css" media="screen">
img {
float: left;
width: 150px;
height: 150px;
}
p {
clear: both;
margin: 1em 2em;
height: 180px;
}
img {
transform: rotate3d(0, 0, 1, 0);
}
</style>
</head>
<body>
<h1>Image optimisation in layers</h1>
<p style="height: auto">
In order to run this test you should enable the debugging options that indicate
what type of compositing layer is being used.
</p>
<pre>
defaults write com.apple.Safari WebCoreLayerRepaintCounter -bool yes
defaults write com.apple.Safari WebCoreLayerBorders -bool yes
</pre>
<p style="height: auto">
Directly composited image layers will have a yellow border and no repaint counter.
</p>
<p>
<img src="resources/simple_image.png">
Basic image - no style - can be directly composited
</p>
<p>
<img src="resources/simple_image.png" style="border: 5px solid blue;">
5px blue border - can NOT be directly composited
</p>
<p>
<img src="resources/simple_image.png" style="margin: 10px 20px;">
margin - can NOT be directly composited
</p>
<p>
<img src="resources/simple_image.png" style="background-color: grey;">
solid background - can be directly composited
</p>
<p>
<img src="resources/simple_image.png" style="background: orange url(resources/simple_image.png) -50px -50px;">
background image - can NOT be directly composited
</p>
<p>
<img src="resources/simple_image.png" style="transform: rotate3d(0, 0, 1, 10deg);">
rotated but otherwise no style - can be directly composited
</p>
</body>
</html>
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