C# ASP.NET - 图片在线裁剪

/** * jquery.Jcrop.js v0.9.5 * jQuery Image Cropping Plugin * @author Kelly Hallman <khallman@wrack.org> * Copyright (c) 2008 Kelly Hallman - released under MIT License {{{ * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, * copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following * conditions: * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * }}} */ $.Jcrop = function(obj, opt) { // Initialization {{{ // Sanitize some options {{{ var obj = obj, opt = opt; if (typeof(obj) !== 'object') obj = $(obj)[0]; if (typeof(opt) !== 'object') opt = { }; if (!('trackDocument' in opt)) opt.trackDocument = $.browser.msie ? false : true; if (!('keySupport' in opt)) opt.keySupport = $.browser.msie ? false : true; // }}} // Extend the default options {{{ var defaults = { // Basic Settings trackDocument: false, baseClass: 'jcrop', addClass: null, // Styling Options bgColor: 'black', bgOpacity: .6, borderOpacity: .4, handleOpacity: .5, handlePad: 5, handleSize: 9, handleOffset: 5, edgeMargin: 14, aspectRatio: 0, keySupport: true, cornerHandles: true, sideHandles: true, drawBorders: true, dragEdges: true, boxWidth: 0, boxHeight: 0, boundary: 8, animationDelay: 20, swingSpeed: 3, watchShift: false, minSelect: [0, 0], maxSize: [0, 0], minSize: [0, 0], // Callbacks / Event Handlers onChange: function() { }, onSelect: function() { } }; var options = defaults; setOptions(opt); // }}} // Initialize some jQuery objects {{{ var $img = $(obj).css({ position: 'absolute' }); presize($img, options.boxWidth, options.boxHeight); var boundx = $img.width(), boundy = $img.height(), $div = $('<div />') .width(boundx).height(boundy) .addClass(cssClass('holder')) .css({ position: 'relative', //overflow: 'hidden', backgroundColor: options.bgColor }); if (options.addClass) $div.addClass(options.addClass); $img.wrap($div); var $img2 = $('<img />')/*{{{*/ .attr('src', $img.attr('src')) .css('position', 'absolute') .width(boundx).height(boundy); /*}}}*/ var $img_holder = $('<div />')/*{{{*/ .width(pct(100)).height(pct(100)) .css({ zIndex: 310, position: 'absolute', overflow: 'hidden' }) .append($img2); /*}}}*/ var $hdl_holder = $('<div />')/*{{{*/ .width(pct(100)).height(pct(100)) .css({ zIndex: 320 //position: 'absolute' }); /*}}}*/ var $sel = $('<div />')/*{{{*/ .css({ position: 'absolute', zIndex: 300 }) .insertBefore($img) .append($img_holder, $hdl_holder); /*}}}*/ var bound = options.boundary; var $trk = $('<div />') .addClass(cssClass('tracker')) .width(boundx + (bound * 2)) .height(boundy + (bound * 2)) .css({ position: 'absolute', top: px(-bound), left: px(-bound), zIndex: 290, opacity: 0 }) .mousedown(newSelection); /* }}} */ // Set more variables {{{ var xscale, yscale; var docOffset = getPos(obj), // Internal states btndown, aspectLock, lastcurs, dimmed, animating, shift_down; // }}} if ('trueSize' in options)/*{{{*/ { xscale = options.trueSize[0] / boundx; yscale = options.trueSize[1] / boundy; } /*}}}*/ // }}} // Internal Modules {{{ var Coords = function()/*{{{*/ { var x1 = 0, y1 = 0, x2 = 0, y2 = 0, ox, oy; function setPressed(pos)/*{{{*/ { var pos = rebound(pos); x2 = x1 = pos[0]; y2 = y1 = pos[1]; } ; /*}}}*/ function setCurrent(pos)/*{{{*/ { var pos = rebound(pos); ox = pos[0] - x2; oy = pos[1] - y2; x2 = pos[0]; y2 = pos[1]; } ; /*}}}*/ function getOffset()/*{{{*/ { return [ox, oy]; } ; /*}}}*/ function moveOffset(offset)/*{{{*/ { var ox = offset[0], oy = offset[1]; if (0 > x1 + ox) ox -= ox + x1; if (0 > y1 + oy) oy -= oy + y1; if (boundy < y2 + oy) oy += boundy - (y2 + oy); if (boundx < x2 + ox) ox += boundx - (x2 + ox); x1 += ox; x2 += ox; y1 += oy; y2 += oy; } ; /*}}}*/ function getCorner(ord)/*{{{*/ { var c = getFixed(); switch (ord) { case 'ne': return [c.x2, c.y]; case 'nw': return [c.x, c.y]; case 'se': return [c.x2, c.y2]; case 'sw': return [c.x, c.y2]; } } ; /*}}}*/ function getFixed()/*{{{*/ { if (!options.aspectRatio && !aspectLock) return getRect(); // This function could use some optimization I think... var aspect = options.aspectRatio ? options.aspectRatio : aspectLock, min = options.minSize, max = options.maxSize, rw = x2 - x1, rh = y2 - y1, rwa = Math.abs(rw), rha = Math.abs(rh), real_ratio = rwa / rha, xx, yy; if (real_ratio < aspect) { yy = y2; w = rha * aspect; xx = rw < 0 ? x1 - w : w + x1; if (xx < 0) { xx = 0; h = Math.abs((xx - x1) / aspect); yy = rh < 0 ? y1 - h : h + y1; } else if (xx > boundx) { xx = boundx; h = Math.abs((xx - x1) / aspect); yy = rh < 0 ? y1 - h : h + y1; } } else { xx = x2; h = rwa / aspect; yy = rh < 0 ? y1 - h : y1 + h; if (yy < 0) { yy = 0; w = Math.abs((yy - y1) * aspect); xx = rw < 0 ? x1 - w : w + x1; } else if (yy > boundy) { yy = boundy; w = Math.abs(yy - y1) * aspect; xx = rw < 0 ? x1 - w : w + x1; }