具体代码：

 
 
 
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效果预览
 
 //容器对象
 var ImageTrans = function(container, options) {
 this._initialize(container, options);
 this._initMode();
 if (this._support) {
 this._initContainer();
 this._init();
 } else { //模式不支持
 this.onError("not support");
 }
 };
 ImageTrans.prototype = {
 //初始化程序
 _initialize: function(container, options) {
 var container = this._container = $$(container);
 this._clientWidth = container.clientWidth; //变换区域宽度
 this._clientHeight = container.clientHeight; //变换区域高度
 this._img = new Image(); //图片对象
 this._style = {}; //备份样式
 this._x = this._y = 1; //水平/垂直变换参数
 this._radian = 0; //旋转变换参数
 this._support = false; //是否支持变换
 this._init = this._load = this._show = this._dispose = $$.emptyFunction;
 var opt = this._setOptions(options);
 this._zoom = opt.zoom;
 this.onPreLoad = opt.onPreLoad;
 this.onLoad = opt.onLoad;
 this.onError = opt.onError;
 this._LOAD = $$F.bind(function() {
 this.onLoad();
 this._load();
 this.reset();
 this._img.style.visibility = "visible";
 }, this);
 $$CE.fireEvent(this, "init");
 },
 //设置默认属性
 _setOptions: function(options) {
 this.options = { //默认值
 mode: "css3|filter|canvas",
 zoom: .1, //缩放比率
 onPreLoad: function() {}, //图片加载前执行
 onLoad: function() {}, //图片加载后执行
 onError: function(err) {} //出错时执行
 };
 return $$.extend(this.options, options || {});
 },
 //模式设置
 _initMode: function() {
 var modes = ImageTrans.modes;
 this._support = $$A.some(this.options.mode.toLowerCase().split("|"), function(mode) {
 mode = modes[mode];
 if (mode && mode.support) {
 mode.init && (this._init = mode.init); //初始化执行程序
 mode.load && (this._load = mode.load); //加载图片执行程序
 mode.show && (this._show = mode.show); //变换显示程序
 mode.dispose && (this._dispose = mode.dispose); //销毁程序
 //扩展变换方法
 $$A.forEach(ImageTrans.transforms, function(transform, name) {
 this[name] = function() {
 transform.apply(this, [].slice.call(arguments));
 this._show();
 }
 }, this);
 return true;
 }
 }, this);
 },
 //初始化容器对象
 _initContainer: function() {
 var container = this._container,
 style = container.style,
 position = $$D.getStyle(container, "position");
 this._style = {
 "position": style.position,
 "overflow": style.overflow
 }; //备份样式
 if (position != "relative" && position != "absolute") {
 style.position = "relative";
 }
 style.overflow = "hidden";
 $$CE.fireEvent(this, "initContainer");
 },
 //加载图片
 load: function(src) {
 if (this._support) {
 var img = this._img,
 oThis = this;
 img.onload || (img.onload = this._LOAD);
 img.onerror || (img.onerror = function() {
 oThis.onError("err image");
 });
 img.style.visibility = "hidden";
 this.onPreLoad();
 img.src = src;
 }
 },
 //重置
 reset: function() {
 if (this._support) {
 this._x = this._y = 1;
 this._radian = 0;
 this._show();
 }
 },
 //销毁程序
 dispose: function() {
 if (this._support) {
 this._dispose();
 $$CE.fireEvent(this, "dispose");
 $$D.setStyle(this._container, this._style); //恢复样式
 this._container = this._img = this._img.onload = this._img.onerror = this._LOAD = null;
 }
 }
 };
 //变换模式
 ImageTrans.modes = function() {
 var css3Transform; //ccs3变换样式
 //初始化图片对象函数
 function initImg(img, container) {
 $$D.setStyle(img, {
 position: "absolute",
 border: 0,
 padding: 0,
 margin: 0,
 width: "auto",
 height: "auto", //重置样式
 visibility: "hidden" //加载前隐藏
 });
 container.appendChild(img);
 }
 //获取变换参数函数
 function getMatrix(radian, x, y) {
 var Cos = Math.cos(radian),
 Sin = Math.sin(radian);
 return {
 M11: Cos * x,
 M12: -Sin * y,
 M21: Sin * x,
 M22: Cos * y
 };
 }
 return {
 css3: { //css3设置
 support: function() {
 var style = document.createElement("div").style;
 return $$A.some(
 ["transform", "MozTransform", "webkitTransform", "OTransform"],
 function(css) {
 if (css in style) {
 css3Transform = css;
 return true;
 }
 });
 }(),
 init: function() {
 initImg(this._img, this._container);
 },
 load: function() {
 var img = this._img;
 $$D.setStyle(img, { //居中
 top: (this._clientHeight - img.height) / 2 + "px",
 left: (this._clientWidth - img.width) / 2 + "px",
 visibility: "visible"
 });
 },
 show: function() {
 var matrix = getMatrix(this._radian, this._y, this._x);
 //设置变形样式
 this._img.style[css3Transform] = "matrix(" + matrix.M11.toFixed(16) + "," + matrix.M21.toFixed(16) + "," + matrix.M12.toFixed(16) + "," + matrix.M22.toFixed(16) + ", 0, 0)";
 },
 dispose: function() {
 this._container.removeChild(this._img);
 }
 },
 filter: { //滤镜设置
 support: function() {
 return "filters" in document.createElement("div");
 }(),
 init: function() {
 initImg(this._img, this._container);
 //设置滤镜
 this._img.style.filter = "progid:DXImageTransform.Microsoft.Matrix(SizingMethod='auto expand')";
 },
 load: function() {
 this._img.onload = null; //防止ie重复加载gif的bug
 this._img.style.visibility = "visible";
 },
 show: function() {
 var img = this._img;
 //设置滤镜
 $$.extend(
 img.filters.item("DXImageTransform.Microsoft.Matrix"),
 getMatrix(this._radian, this._y, this._x)
 );
 //保持居中
 img.style.top = (this._clientHeight - img.offsetHeight) / 2 + "px";
 img.style.left = (this._clientWidth - img.offsetWidth) / 2 + "px";
 },
 dispose: function() {
 this._container.removeChild(this._img);
 }
 },
 canvas: { //canvas设置
 support: function() {
 return "getContext" in document.createElement('canvas');
 }(),
 init: function() {
 var canvas = this._canvas = document.createElement('canvas'),
 context = this._context = canvas.getContext('2d');
 //样式设置
 $$D.setStyle(canvas, {
 position: "absolute",
 left: 0,
 top: 0
 });
 canvas.width = this._clientWidth;
 canvas.height = this._clientHeight;
 this._container.appendChild(canvas);
 },
 show: function() {
 var img = this._img,
 context = this._context,
 clientWidth = this._clientWidth,
 clientHeight = this._clientHeight;
 //canvas变换
 context.save();
 context.clearRect(0, 0, clientWidth, clientHeight); //清空内容
 context.translate(clientWidth / 2, clientHeight / 2); //中心坐标
 context.rotate(this._radian); //旋转
 context.scale(this._y, this._x); //缩放
 context.drawImage(img, -img.width / 2, -img.height / 2); //居中画图
 context.restore();
 },
 dispose: function() {
 this._container.removeChild(this._canvas);
 this._canvas = this._context = null;
 }
 }
 };
 }();
 //变换方法
 ImageTrans.transforms = {
 //垂直翻转
 vertical: function() {
 this._radian = Math.PI - this._radian;
 this._y *= -1;
 },
 //水平翻转
 horizontal: function() {
 this._radian = Math.PI - this._radian;
 this._x *= -1;
 },
 //根据弧度旋转
 rotate: function(radian) {
 this._radian = radian;
 },
 //向左转90度
 left: function() {
 this._radian -= Math.PI / 2;
 },
 //向右转90度
 right: function() {
 this._radian += Math.PI / 2;
 },
 //根据角度旋转
 rotatebydegress: function(degress) {
 this._radian = degress * Math.PI / 180;
 },
 //缩放
 scale: function() {
 function getZoom(scale, zoom) {
 return scale > 0 && scale > -zoom ? zoom :
 scale < 0 && scale < zoom ? -zoom : 0;
 }
 return function(zoom) {
 if (zoom) {
 var hZoom = getZoom(this._y, zoom),
 vZoom = getZoom(this._x, zoom);
 if (hZoom && vZoom) {
 this._y += hZoom;
 this._x += vZoom;
 }
 }
 }
 }(),
 //放大
 zoomin: function() {
 this.scale(Math.abs(this._zoom));
 },
 //缩小
 zoomout: function() {
 this.scale(-Math.abs(this._zoom));
 }
 };
 //拖动旋转
 ImageTrans.prototype._initialize = (function() {
 var init = ImageTrans.prototype._initialize,
 methods = {
 "init": function() {
 this._mrX = this._mrY = this._mrRadian = 0;
 this._mrSTART = $$F.bind(start, this);
 this._mrMOVE = $$F.bind(move, this);
 this._mrSTOP = $$F.bind(stop, this);
 },
 "initContainer": function() {
 $$E.addEvent(this._container, "mousedown", this._mrSTART);
 },
 "dispose": function() {
 $$E.removeEvent(this._container, "mousedown", this._mrSTART);
 this._mrSTOP();
 this._mrSTART = this._mrMOVE = this._mrSTOP = null;
 }
 };
 //开始函数
 function start(e) {
 var rect = $$D.clientRect(this._container);
 this._mrX = rect.left + this._clientWidth / 2;
 this._mrY = rect.top + this._clientHeight / 2;
 this._mrRadian = Math.atan2(e.clientY - this._mrY, e.clientX - this._mrX) - this._radian;
 $$E.addEvent(document, "mousemove", this._mrMOVE);
 $$E.addEvent(document, "mouseup", this._mrSTOP);
 if ($$B.ie) {
 var container = this._container;
 $$E.addEvent(container, "losecapture", this._mrSTOP);
 container.setCapture();
 } else {
 $$E.addEvent(window, "blur", this._mrSTOP);
 e.preventDefault();
 }
 };
 //拖动函数
 function move(e) {
 this.rotate(Math.atan2(e.clientY - this._mrY, e.clientX - this._mrX) - this._mrRadian);
 window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
 };
 //停止函数
 function stop() {
 $$E.removeEvent(document, "mousemove", this._mrMOVE);
 $$E.removeEvent(document, "mouseup", this._mrSTOP);
 if ($$B.ie) {
 var container = this._container;
 $$E.removeEvent(container, "losecapture", this._mrSTOP);
 container.releaseCapture();
 } else {
 $$E.removeEvent(window, "blur", this._mrSTOP);
 };
 };
 return function() {
 var options = arguments[1];
 if (!options || options.mouseRotate !== false) {
 //扩展钩子
 $$A.forEach(methods, function(method, name) {
 $$CE.addEvent(this, name, method);
 }, this);
 }
 init.apply(this, arguments);
 }
 })();
 //滚轮缩放
 ImageTrans.prototype._initialize = (function() {
 var init = ImageTrans.prototype._initialize,
 mousewheel = $$B.firefox ? "DOMMouseScroll" : "mousewheel",
 methods = {
 "init": function() {
 this._mzZoom = $$F.bind(zoom, this);
 },
 "initContainer": function() {
 $$E.addEvent(this._container, mousewheel, this._mzZoom);
 },
 "dispose": function() {
 $$E.removeEvent(this._container, mousewheel, this._mzZoom);
 this._mzZoom = null;
 }
 };
 //缩放函数
 function zoom(e) {
 this.scale((
 e.wheelDelta ? e.wheelDelta / (-120) : (e.detail || 0) / 3
 ) * Math.abs(this._zoom));
 e.preventDefault();
 };
 return function() {
 var options = arguments[1];
 if (!options || options.mouseZoom !== false) {
 //扩展钩子
 $$A.forEach(methods, function(method, name) {
 $$CE.addEvent(this, name, method);
 }, this);
 }
 init.apply(this, arguments);
 }
 })();
 
 

 
 
 
 
 
 
 
 
 
 

abc.js