<head>
<style>
.inlineTest {
font-size:24px;
background-color:grey;
-webkit-mask-box-image: url(resources/mask.png) 75 / auto / 10px;
padding:10px 75px;
line-height:3
}
</style>
</head>
<body>
<span class="inlineTest">This content should be masked<br> with a soft glow.</span>