在css3中,直接在图片上使用box-shadow 和 border-radius,浏览器并不能很好的渲染。但是如果把图片作为background-image,添加的样式浏览器可以很好的渲染。我将会介绍如何使用box-shadow, border-radius 和 transition创建不同图片样式效果。 
问题 
通过查看demo能注意到,我们为第一行图片设置了border-radius 和 内嵌box-shadow。firefox渲染了图片的border-radius,但是没有渲染内嵌box-shadow。chrome和Safari两种效果都没有渲染。 
 
.normal img { 
border: solid 5px #000; 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
-webkit-box-shadow: inset 0 1px 5px rgba(0,0,0,.5); 
-moz-box-shadow: inset 0 1px 5px rgba(0,0,0,.5); 
box-shadow: inset 0 1px 5px rgba(0,0,0,.5); 
} 
firefox效果: 
 chrome/safari 
 
变通方案 为了使border-radius 和 内嵌box-shadow能够正常工作,我们需要把图片转换成background-image的方式。 
 动态方式 为了动态完成这一工作,我们需要借助jquery为每一个图片添加背景图片的包装。下面的js代码为每一个图片添加了一个span的包装,span的背景图片路径就是图片的路径。 
代码比较简单,我想就没有讲解的必要了。不清楚了可以直接去查jquery的api。 
 
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script> 
<script type="text/javascript"> 
$(document).ready(function(){ 
$("img").load(function() { 
$(this).wrap(function(){ 
return '<span class="image-wrap ' + $(this).attr('class') + '" style="position:relative; display:inline-block; background:url(' + $(this).attr('src') + ') no-repeat center center; width: ' + $(this).width() + 'px; height: ' + $(this).height() + 'px;" />'; 
}); 
$(this).css("opacity","0"); 
}); 
}); 
</script> 
输出 
上面的代码会输出如下结果: 
 
<span class="image-wrap " style="position:relative; display:inline-block; background:url(image.jpg) no-repeat center center; width: 150px; height: 150px;"> 
<img src="image.jpg" style="opacity: 0;"> 
</span> 
圆形图片 添加我们使用border-radius来实现圆形图片的效果,效果如下: 
 css: 
 
.circle .image-wrap { 
-webkit-border-radius: 50em; 
-moz-border-radius: 50em; 
border-radius: 50em; 
} 
卡片风格 下面是卡片风格的图片,使用了多个内嵌box-shadow。 
 css: 
 
.card .image-wrap { 
-webkit-box-shadow: inset 0 0 1px rgba(0,0,0,.8), inset 0 2px 0 rgba(255,255,255,.5), inset 0 -1px 0 rgba(0,0,0,.4); 
-moz-box-shadow: inset 0 0 1px rgba(0,0,0,.8), inset 0 2px 0 rgba(255,255,255,.5), inset 0 -1px 0 rgba(0,0,0,.4); 
box-shadow: inset 0 0 1px rgba(0,0,0,.8), inset 0 2px 0 rgba(255,255,255,.5), inset 0 -1px 0 rgba(0,0,0,.4); 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
浮雕风格 下面是浮雕效果。 
 css: 
 
.embossed .image-wrap { 
-webkit-box-shadow: inset 0 0 2px rgba(0,0,0,.8), inset 0 2px 0 rgba(255,255,255,.5), inset 0 -7px 0 rgba(0,0,0,.6), inset 0 -9px 0 rgba(255,255,255,.3); 
-moz-box-shadow: inset 0 0 2px rgba(0,0,0,.8), inset 0 2px 0 rgba(255,255,255,.5), inset 0 -7px 0 rgba(0,0,0,.6), inset 0 -9px 0 rgba(255,255,255,.3); 
box-shadow: inset 0 0 2px rgba(0,0,0,.8), inset 0 2px 0 rgba(255,255,255,.5), inset 0 -7px 0 rgba(0,0,0,.6), inset 0 -9px 0 rgba(255,255,255,.3); 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
柔性浮雕风格 相对于浮雕样式,新样式添加了1px blur属性。 
 css: 
 
.soft-embossed .image-wrap { 
-webkit-box-shadow: inset 0 0 4px rgba(0,0,0,1), inset 0 2px 1px rgba(255,255,255,.5), inset 0 -9px 2px rgba(0,0,0,.6), inset 0 -12px 2px rgba(255,255,255,.3); 
-moz-box-shadow: inset 0 0 4px rgba(0,0,0,1), inset 0 2px 1px rgba(255,255,255,.5), inset 0 -9px 2px rgba(0,0,0,.6), inset 0 -12px 2px rgba(255,255,255,.3); 
box-shadow: inset 0 0 4px rgba(0,0,0,1), inset 0 2px 1px rgba(255,255,255,.5), inset 0 -9px 2px rgba(0,0,0,.6), inset 0 -12px 2px rgba(255,255,255,.3); 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
抠图风格 使用内嵌box-shadow就可以实现抠图效果。 
 css: 
 
.cut-out .image-wrap { 
-webkit-box-shadow: 0 1px 0 rgba(255,255,255,.2), inset 0 4px 5px rgba(0,0,0,.6), inset 0 1px 0 rgba(0,0,0,.6); 
-moz-box-shadow: 0 1px 0 rgba(255,255,255,.2), inset 0 4px 5px rgba(0,0,0,.6), inset 0 1px 0 rgba(0,0,0,.6); 
box-shadow: 0 1px 0 rgba(255,255,255,.2), inset 0 4px 5px rgba(0,0,0,.6), inset 0 1px 0 rgba(0,0,0,.6); 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
变形和发光 在这个例子中我们为图片包装添加transition属性,鼠标滑过的时候,他会从圆角变为圆形。然后我们使用多个box-shadow实现发光效果。 
 css: 
 
.morphing-glowing .image-wrap { 
-webkit-transition: 1s; 
-moz-transition: 1s; 
transition: 1s; 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
.morphing-glowing .image-wrap:hover { 
-webkit-box-shadow: 0 0 20px rgba(255,255,255,.6), inset 0 0 20px rgba(255,255,255,1); 
-moz-box-shadow: 0 0 20px rgba(255,255,255,.6), inset 0 0 20px rgba(255,255,255,1); 
box-shadow: 0 0 20px rgba(255,255,255,.6), inset 0 0 20px rgba(255,255,255,1); 
-webkit-border-radius: 60em; 
-moz-border-radius: 60em; 
border-radius: 60em; 
} 
高光效果 高光的效果是通过为元素添加 :after 伪类实现的。 
 css: 
 
.glossy .image-wrap { 
-webkit-box-shadow: inset 0 -1px 0 rgba(0,0,0,.5); 
-moz-box-shadow: inset 0 -1px 0 rgba(0,0,0,.5); 
box-shadow: inset 0 -1px 0 rgba(0,0,0,.5); 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
.glossy .image-wrap:after { 
position: absolute; 
content: ' '; 
width: 100%; 
height: 50%; 
top: 0; 
left: 0; 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
background: -moz-linear-gradient(top, rgba(255,255,255,0.7) 0%, rgba(255,255,255,.1) 100%); 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,0.7)), color-stop(100%,rgba(255,255,255,.1))); 
background: linear-gradient(top, rgba(255,255,255,0.7) 0%,rgba(255,255,255,.1) 100%); 
} 
倒影效果 在这个例子中,我们将高光效果移到底部就实现倒影效果。 
 css: 
 
.reflection .image-wrap:after { 
position: absolute; 
content: ' '; 
width: 100%; 
height: 30px; 
bottom: -31px; 
left: 0; 
-webkit-border-top-left-radius: 20px; 
-webkit-border-top-right-radius: 20px; 
-moz-border-radius-topleft: 20px; 
-moz-border-radius-topright: 20px; 
border-top-left-radius: 20px; 
border-top-right-radius: 20px; 
background: -moz-linear-gradient(top, rgba(0,0,0,.3) 0%, rgba(255,255,255,0) 100%); 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,.3)), color-stop(100%,rgba(255,255,255,0))); 
background: linear-gradient(top, rgba(0,0,0,.3) 0%,rgba(255,255,255,0) 100%); 
} 
.reflection .image-wrap:hover { 
position: relative; 
top: -8px; 
} 
高光和倒影 本例我们使用:before 和 :after 将高光和倒影效果组合起来。 
 css: 
 
.glossy-reflection .image-wrap { 
-webkit-box-shadow: inset 0 -1px 0 rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.6); 
-moz-box-shadow: inset 0 -1px 0 rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.6); 
box-shadow: inset 0 -1px 0 rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.6); 
-webkit-transition: 1s; 
-moz-transition: 1s; 
transition: 1s; 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
.glossy-reflection .image-wrap:before { 
position: absolute; 
content: ' '; 
width: 100%; 
height: 50%; 
top: 0; 
left: 0; 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
background: -moz-linear-gradient(top, rgba(255,255,255,0.7) 0%, rgba(255,255,255,.1) 100%); 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,0.7)), color-stop(100%,rgba(255,255,255,.1))); 
background: linear-gradient(top, rgba(255,255,255,0.7) 0%,rgba(255,255,255,.1) 100%); 
} 
.glossy-reflection .image-wrap:after { 
position: absolute; 
content: ' '; 
width: 100%; 
height: 30px; 
bottom: -31px; 
left: 0; 
-webkit-border-top-left-radius: 20px; 
-webkit-border-top-right-radius: 20px; 
-moz-border-radius-topleft: 20px; 
-moz-border-radius-topright: 20px; 
border-top-left-radius: 20px; 
border-top-right-radius: 20px; 
background: -moz-linear-gradient(top, rgba(230,230,230,.3) 0%, rgba(230,230,230,0) 100%); 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(230,230,230,.3)), color-stop(100%,rgba(230,230,230,0))); 
background: linear-gradient(top, rgba(230,230,230,.3) 0%,rgba(230,230,230,0) 100%); 
} 
胶带风格 在这个例子中,我们使用:after来实现胶带的效果。 
 css: 
 
.tape .image-wrap { 
-webkit-box-shadow: inset 0 0 2px rgba(0,0,0,.7), inset 0 2px 0 rgba(255,255,255,.3), inset 0 -1px 0 rgba(0,0,0,.5), 0 1px 3px rgba(0,0,0,.4); 
-moz-box-shadow: inset 0 0 2px rgba(0,0,0,.7), inset 0 2px 0 rgba(255,255,255,.3), inset 0 -1px 0 rgba(0,0,0,.5), 0 1px 3px rgba(0,0,0,.4); 
box-shadow: inset 0 0 2px rgba(0,0,0,.7), inset 0 2px 0 rgba(255,255,255,.3), inset 0 -1px 0 rgba(0,0,0,.5), 0 1px 3px rgba(0,0,0,.4); 
} 
.tape .image-wrap:after { 
position: absolute; 
content: ' '; 
width: 60px; 
height: 25px; 
top: -10px; 
left: 50%; 
margin-left: -30px; 
border: solid 1px rgba(137,130,48,.2); 
background: -moz-linear-gradient(top, rgba(254,243,127,.6) 0%, rgba(240,224,54,.6) 100%); 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(254,243,127,.6)), color-stop(100%,rgba(240,224,54,.6))); 
background: linear-gradient(top, rgba(254,243,127,.6) 0%,rgba(240,224,54,.6) 100%); 
-webkit-box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 1px 0 rgba(0,0,0,.2); 
} 
变形和着色 在这个例子中,我们在元素上使用:after,当鼠标进过的时候实现径向渐变的效果。 

css: 
 
.morphing-tinting .image-wrap { 
position: relative; 
-webkit-transition: 1s; 
-moz-transition: 1s; 
transition: 1s; 
-webkit-border-radius: 20px; 
-moz-border-radius: 20px; 
border-radius: 20px; 
} 
.morphing-tinting .image-wrap:hover { 
-webkit-border-radius: 30em; 
-moz-border-radius: 30em; 
border-radius: 30em; 
} 
.morphing-tinting .image-wrap:after { 
position: absolute; 
content: ' '; 
width: 100%; 
height: 100%; 
top: 0; 
left: 0; 
-webkit-transition: 1s; 
-moz-transition: 1s; 
transition: 1s; 
-webkit-border-radius: 30em; 
-moz-border-radius: 30em; 
border-radius: 30em; 
} 
.morphing-tinting .image-wrap:hover:after { 
background: -webkit-gradient(radial, 50% 50%, 40, 50% 50%, 80, from(rgba(0,0,0,0)), to(rgba(0,0,0,1))); 
background: -moz-radial-gradient(50% 50%, circle, rgba(0,0,0,0) 40px, rgba(0,0,0,1) 80px); 
} 
羽化边缘圆形 我们同样可以使用径向渐变产生遮罩,实现羽化的效果。 
 css: 
 
.feather .image-wrap { 
position: relative; 
-webkit-border-radius: 30em; 
-moz-border-radius: 30em; 
border-radius: 30em; 
} 
.feather .image-wrap:after { 
position: absolute; 
content: ' '; 
width: 100%; 
height: 100%; 
top: 0; 
left: 0; 
background: -webkit-gradient(radial, 50% 50%, 50, 50% 50%, 70, from(rgba(255,255,255,0)), to(rgba(255,255,255,1))); 
background: -moz-radial-gradient(50% 50%, circle, rgba(255,255,255,0) 50px, rgba(255,255,255,1) 70px); 
} 
浏览器兼容性 这种实现方式在大多数支持border-radius, box-shadow, :before and :after特性的浏览器中(例如Chrome, Firefox 和 Safari),都能很好的工作。在不支持新特性的浏览器中,只会显示原始图片。 
创造你自己的实现 
借助:before 和:after伪类能为图片创造很多种样式,你可以自己尝试创建出新的效果。