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图片渐变倒影效果

[作者：佚名 | 来源：本站整理 | 发布时间：2008-6-23 9:57:31 | 收藏本文 ] 【大中小】

以下是原始代码,点击运行即可演示特效!

<SCRIPT LANGUAGE="JavaScript">
<!--
/**
 * reflection.js v1.5
 *
 * Contributors: Cow http://cow.neondragon.net
 *               Gfx http://www.jroller.com/page/gfx/
 *               Sitharus http://www.sitharus.com
 *               Andreas Linde http://www.andreaslinde.de
 *               Tralala, coder @ http://www.vbulletin.org
 *
 * Freely distributable under MIT-style license.
 */
 
/* From prototype.js */
document.getElementsByClassName = function(className) {
 var children = document.getElementsByTagName('*') || document.all;
 var elements = new Array();
  
 for (var i = 0; i < children.length; i++) {
  var child = children[i];
  var classNames = child.className.split(' ');
  for (var j = 0; j < classNames.length; j++) {
   if (classNames[j] == className) {
    elements.push(child);
    break;
   }
  }
 }
 return elements;
}

var reflectionHeight = Math.floor(p.height*options['height']);
   var divHeight = Math.floor(p.height*(1+options['height']));
   
   var reflectionWidth = p.width;
 
   /* Copy original image's classes & styles to div */
   d.className = newClasses;
   p.className = 'reflected';
   
   d.style.cssText = p.style.cssText;
   p.style.cssText = ' ';
   
   if (document.all  &&  !window.opera) {
    var reflection = document.createElement('img');
    reflection.src = p.src;
    reflection.style.width = reflectionWidth+'px';
    
    reflection.style.marginBottom = "-"+(p.height-reflectionHeight)+'px';
    reflection.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(options['opacity']*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(options['height']*100)+')';
    
    d.style.width = reflectionWidth+'px';
    d.style.height = divHeight+'px';
    p.parentNode.replaceChild(d, p);
    
    d.appendChild(p);
    d.appendChild(reflection);
   } else {
    var canvas = document.createElement('canvas');
    var context = canvas.getContext("2d");
   
    canvas.style.height = reflectionHeight+'px';
    canvas.style.width = reflectionWidth+'px';
    canvas.height = reflectionHeight;
    canvas.width = reflectionWidth;
    
    d.style.width = reflectionWidth+'px';
    d.style.height = divHeight+'px';
    p.parentNode.replaceChild(d, p);
    
    d.appendChild(p);
    d.appendChild(canvas);
    
    context.save();
    
    context.translate(0,image.height-1);
    context.scale(1,-1);
    
    context.drawImage(image, 0, 0, reflectionWidth, image.height);

context.restore();
    
    context.globalCompositeOperation = "destination-out";
    var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);
    
    gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");
    gradient.addColorStop(0, "rgba(255, 255, 255, "+(1-options['opacity'])+")");
 
    context.fillStyle = gradient;
    if (navigator.appVersion.indexOf('WebKit') != -1) {
     context.fill();
    } else {
     context.fillRect(0, 0, reflectionWidth, reflectionHeight*2);
    }
   }
  } catch (e) {
     }
 },
 
 remove : function(image) {
  if (image.className == "reflected") {
   image.className = image.parentNode.className;
   image.parentNode.parentNode.replaceChild(image, image.parentNode);
  }
 }
}

var previousOnload = window.onload;
window.onload = function () { if(previousOnload) previousOnload(); addReflections(); }

//-->
</SCRIPT>

</head>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

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