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html5版canvas自由拼图
效果:
canvasElement.js
1 define(‘canvasElement‘, [ ‘../multi_upload/core‘ ], function(S) { 2 var Canvas = window.Canvas || {}; 3 (function () { 4 Canvas.Element = function() {}; 5 Canvas.Element.prototype.fillBackground = true; 6 Canvas.Element.prototype.showcorners = false; 7 Canvas.Element.prototype.photoborder = true; 8 Canvas.Element.prototype.polaroid = false; 9 Canvas.Element.prototype._backgroundImg = null; 10 Canvas.Element.prototype._groupSelector = null; 11 Canvas.Element.prototype._aImages = null; 12 Canvas.Element.prototype._oContext = null; 13 Canvas.Element.prototype._oElement = null; 14 Canvas.Element.prototype._oConfig = null; 15 Canvas.Element.prototype._currentTransform = null; 16 Canvas.Element.prototype._prevTransform = null; 17 Canvas.Element.prototype.curAngle = null; 18 Canvas.Element.prototype.init = function(el, oConfig) { 19 if (el == ‘‘) { 20 return; 21 } 22 this._initElement(el); 23 this._initConfig(oConfig); 24 this._createCanvasBackground(); 25 this._createContainer(); 26 this._initEvents(); 27 this._initCustomEvents(); 28 }; 29 Canvas.Element.prototype._initElement = function(el) { 30 this._oElement = document.getElementById(el); 31 this._oContextTop = this._oElement.getContext(‘2d‘); 32 }; 33 Canvas.Element.prototype._initCustomEvents = function() { 34 this.onRotateStart = new Canvas.CustomEvent(‘onRotateStart‘); 35 this.onRotateMove = new Canvas.CustomEvent(‘onRotateMove‘); 36 this.onRotateComplete = new Canvas.CustomEvent(‘onRotateComplete‘); 37 this.onDragStart = new Canvas.CustomEvent(‘onDragStart‘); 38 this.onDragMove = new Canvas.CustomEvent(‘onDragMove‘); 39 this.onDragComplete = new Canvas.CustomEvent(‘onDragComplete‘); 40 }; 41 Canvas.Element.prototype._initConfig = function(oConfig) { 42 this._oConfig = oConfig; 43 this._oElement.width = this._oConfig.width; 44 this._oElement.height = this._oConfig.height; 45 this._oElement.style.width = this._oConfig.width + ‘px‘; 46 this._oElement.style.height = this._oConfig.height + ‘px‘; 47 }; 48 Canvas.Element.prototype._initEvents = function() { 49 var _this=this; 50 S(this._oElement).on(‘mousedown‘,function(e){ 51 _this.onMouseDown(e); 52 }); 53 S(this._oElement).on( ‘mouseup‘, function(e){ 54 _this.onMouseUp(e); 55 }); 56 S(this._oElement).on(‘mousemove‘, function(e){ 57 _this.onMouseMove(e); 58 }); 59 }; 60 Canvas.Element.prototype._createContainer = function() { 61 var canvasEl = document.createElement(‘canvas‘); 62 canvasEl.id = this._oElement.id + ‘-canvas-container‘; 63 var oContainer = this._oElement.parentNode.insertBefore(canvasEl, this._oElement); 64 oContainer.width = this._oConfig.width; 65 oContainer.height = this._oConfig.height; 66 oContainer.style.width = this._oConfig.width + ‘px‘; 67 oContainer.style.height = this._oConfig.height + ‘px‘; 68 this._oContextContainer = oContainer.getContext(‘2d‘); 69 }; 70 Canvas.Element.prototype._createCanvasBackground = function() { 71 var canvasEl = document.createElement(‘canvas‘); 72 canvasEl.id = this._oElement.id + ‘-canvas-background‘; 73 var oBackground = this._oElement.parentNode.insertBefore(canvasEl, this._oElement); 74 oBackground.width = this._oConfig.width; 75 oBackground.height = this._oConfig.height; 76 oBackground.style.width = this._oConfig.width + ‘px‘; 77 oBackground.style.height = this._oConfig.height + ‘px‘; 78 this._oContextBackground = oBackground.getContext(‘2d‘); 79 }; 80 Canvas.Element.prototype.setCanvasBackground = function(oImg) { 81 this._backgroundImg = oImg; 82 var originalImgSize = oImg.getOriginalSize(); 83 this._oContextBackground.drawImage(oImg._oElement, 0, 0, originalImgSize.width, originalImgSize.height); 84 }; 85 Canvas.Element.prototype.onMouseUp = function(e) { 86 if (this._aImages == null) { 87 return; 88 } 89 if (this._currentTransform) { 90 this._currentTransform.target.setImageCoords(); 91 } 92 if (this._currentTransform != null && this._currentTransform.action == "rotate") { 93 this.onRotateComplete.fire(e); 94 } else if (this._currentTransform != null && this._currentTransform.action == "drag") { 95 this.onDragComplete.fire(e); 96 } 97 this._currentTransform = null; 98 this._groupSelector = null; 99 this.renderTop();100 };101 Canvas.Element.prototype.onMouseDown = function(e) {102 var mp = this.findMousePosition(e);103 if (this._currentTransform != null || this._aImages == null) {104 return;105 }106 var oImg = this.findTargetImage(mp, false);107 if (!oImg) {108 this._groupSelector = { ex: mp.ex, ey: mp.ey,109 top: 0, left: 0 };110 }111 else { 112 var action = (!this.findTargetCorner(mp, oImg)) ? ‘drag‘ : ‘rotate‘;113 if (action == "rotate") {114 this.onRotateMove.fire(e);115 } else if (action == "drag") {116 this.onDragMove.fire(e);117 }118 this._prevTransform=this._currentTransform = { 119 target: oImg,120 action: action,121 scalex: oImg.scalex,122 offsetX: mp.ex - oImg.left,123 offsetY: mp.ey - oImg.top,124 ex: mp.ex, ey: mp.ey,125 left: oImg.left, top: oImg.top,126 theta: oImg.theta 127 };128 $(‘canvas_menu‘).style.transform=‘rotate(‘+oImg.theta*180/3.14+‘deg)‘;129 $(‘canvas_menu‘).style.left=oImg.left+"px";130 $(‘canvas_menu‘).style.top=oImg.top+"px";131 $(‘canvas_menu‘).style.display="block";132 this.renderAll(false,false);133 }134 };135 Canvas.Element.prototype.onMouseMove = function(e) {136 var mp = this.findMousePosition(e);137 if (this._aImages == null) {138 return;139 }140 if (this._groupSelector != null) {141 this._groupSelector.left = mp.ex - this._groupSelector.ex;142 this._groupSelector.top = mp.ey - this._groupSelector.ey;143 this.renderTop();144 }145 else if (this._currentTransform == null) {146 var targetImg = this.findTargetImage(mp, true);147 this.setCursor(mp, targetImg);148 }149 else {150 if (this._currentTransform.action == ‘rotate‘) {151 this.rotateImage(mp);152 this.scaleImage(mp);153 this.onRotateMove.fire(e);154 } 155 else {156 this.translateImage(mp);157 this.onDragMove.fire(e);158 }159 this.renderTop();160 } 161 };162 Canvas.Element.prototype.translateImage = function(mp) {163 this._currentTransform.target.left = mp.ex - this._currentTransform.offsetX;164 this._currentTransform.target.top = mp.ey - this._currentTransform.offsetY;165 $(‘canvas_menu‘).style.left=this._currentTransform.target.left+"px";166 $(‘canvas_menu‘).style.top=this._currentTransform.target.top +"px";167 };168 Canvas.Element.prototype.scaleImage = function(mp) {169 var lastLen = 170 Math.sqrt(Math.pow(this._currentTransform.ey - this._currentTransform.top, 2) +171 Math.pow(this._currentTransform.ex - this._currentTransform.left, 2));172 var curLen = 173 Math.sqrt(Math.pow(mp.ey - this._currentTransform.top, 2) +174 Math.pow(mp.ex - this._currentTransform.left, 2));175 var curScalex= this._currentTransform.scalex * (curLen / lastLen);176 var curScaley=this._currentTransform.target.scalex;177 if(curScalex>0.7&&curScaley>0.7){178 this._currentTransform.target.scalex =curScalex;179 this._currentTransform.target.scaley = curScaley;180 }181 };182 Canvas.Element.prototype.rotateImage = function(mp) {183 var lastAngle = Math.atan2(184 this._currentTransform.ey - this._currentTransform.top,185 this._currentTransform.ex - this._currentTransform.left186 );187 188 var curAngle = Math.atan2(189 mp.ey - this._currentTransform.top,190 mp.ex - this._currentTransform.left191 );192 this._currentTransform.target.theta = (curAngle - lastAngle) + this._currentTransform.theta;193 this.curAngle=this._currentTransform.target.theta*180/3.14;194 $(‘canvas_menu‘).style.transform=‘rotate(‘+this.curAngle+‘deg)‘;195 };196 Canvas.Element.prototype.setCursor = function(mp, targetImg) {197 if (!targetImg) {198 this._oElement.style.cursor = ‘default‘;199 }200 else { 201 var corner = this.findTargetCorner(mp, targetImg);202 if (!corner) 203 {204 this._oElement.style.cursor = ‘default‘;205 }206 else207 {208 if(corner == ‘tr‘) {209 this._oElement.style.cursor = ‘ne-resize‘;210 }211 else if(corner == ‘br‘) {212 this._oElement.style.cursor = ‘se-resize‘;213 }214 else if(corner == ‘bl‘) {215 this._oElement.style.cursor = ‘sw-resize‘;216 }217 else if(corner == ‘tl‘) {218 this._oElement.style.cursor = ‘nw-resize‘;219 } 220 else {221 this._oElement.style.cursor = ‘default‘;222 }223 }224 }225 };226 Canvas.Element.prototype.addImage = function(oImg) {227 if(S.isEmptyObject(this._aImages)) {228 this._aImages = [];229 }230 this._aImages.push(oImg);231 this.renderAll(false,true);232 233 };234 Canvas.Element.prototype.renderAll = function(allOnTop,allowCorners) {235 var containerCanvas = (allOnTop) ? this._oContextTop : this._oContextContainer;236 this._oContextTop.clearRect(0,0,parseInt(this._oConfig.width), parseInt(this._oConfig.height));237 containerCanvas.clearRect(0,0,parseInt(this._oConfig.width), parseInt(this._oConfig.height));238 if (allOnTop) {239 var originalImgSize = this._backgroundImg.getOriginalSize();240 this._oContextTop.drawImage(this._backgroundImg._oElement, 0, 0, originalImgSize.width, originalImgSize.height);241 }242 for (var i = 0, l = this._aImages.length-1; i < l; i += 1) {243 this.drawImageElement(containerCanvas, this._aImages[i],allowCorners); 244 }245 this.drawImageElement(this._oContextTop, this._aImages[this._aImages.length-1],allowCorners);246 };247 Canvas.Element.prototype.renderTop = function() {248 this._oContextTop.clearRect(0,0,parseInt(this._oConfig.width), parseInt(this._oConfig.height));249 this.drawImageElement(this._oContextTop, this._aImages[this._aImages.length-1],true);250 if (this._groupSelector != null) {251 this._oContextTop.fillStyle = "rgba(0, 0, 200, 0.5)";252 this._oContextTop.fillRect(253 this._groupSelector.ex - ((this._groupSelector.left > 0) ?254 0 : - this._groupSelector.left), 255 this._groupSelector.ey - ((this._groupSelector.top > 0) ? 256 0 : - this._groupSelector.top), 257 Math.abs(this._groupSelector.left), 258 Math.abs(this._groupSelector.top)259 );260 this._oContextTop.strokeRect(261 this._groupSelector.ex - ((this._groupSelector.left > 0) ? 262 0 : Math.abs(this._groupSelector.left)), 263 this._groupSelector.ey - ((this._groupSelector.top > 0) ? 264 0 : Math.abs(this._groupSelector.top)), 265 Math.abs(this._groupSelector.left), 266 Math.abs(this._groupSelector.top)267 );268 }269 };270 Canvas.Element.prototype.drawImageElement = function(context, oImg,allowCorners) {271 oImg.cornervisibility=allowCorners;272 var offsetY = oImg.height / 2;273 var offsetX = oImg.width / 2;274 context.save();275 context.translate(oImg.left, oImg.top);276 context.rotate(oImg.theta);277 context.scale(oImg.scalex, oImg.scaley);278 this.drawBorder(context, oImg, offsetX, offsetY);279 var originalImgSize = oImg.getOriginalSize();280 var polaroidHeight = ((oImg.height - originalImgSize.height) - (oImg.width - originalImgSize.width))/2;281 context.drawImage(282 oImg._oElement, 283 - originalImgSize.width/2, 284 ((- originalImgSize.height)/2 - polaroidHeight), 285 originalImgSize.width, 286 originalImgSize.height287 );288 if (oImg.cornervisibility) {289 this.drawCorners(context, oImg, offsetX, offsetY);290 }291 context.restore();292 };293 Canvas.Element.prototype._getImageLines = function(oCoords) {294 return {295 topline: { 296 o: oCoords.tl,297 d: oCoords.tr 298 },299 rightline: { 300 o: oCoords.tr,301 d: oCoords.br 302 },303 bottomline: { 304 o: oCoords.br,305 d: oCoords.bl 306 },307 leftline: { 308 o: oCoords.bl,309 d: oCoords.tl 310 }311 };312 };313 Canvas.Element.prototype.findTargetImage = function(mp, hovering) {314 for (var i = this._aImages.length-1; i >= 0; i -= 1) {315 var iLines = this._getImageLines(this._aImages[i].oCoords);316 var xpoints = this._findCrossPoints(mp, iLines);317 if (xpoints % 2 == 1 && xpoints != 0) {318 var target = this._aImages[i];319 if (!hovering) {320 this._aImages.splice(i, 1);321 this._aImages.push(target);322 }323 return target;324 }325 }326 return false;327 }; 328 Canvas.Element.prototype._findCrossPoints = function(mp, oCoords) {329 var b1, b2, a1, a2, xi, yi;330 var xcount = 0;331 var iLine = null;332 for (lineKey in oCoords) {333 iLine = oCoords[lineKey];334 if ((iLine.o.y < mp.ey) && (iLine.d.y < mp.ey)) {335 continue;336 }337 if ((iLine.o.y >= mp.ey) && (iLine.d.y >= mp.ey)) {338 continue;339 }340 if ((iLine.o.x == iLine.d.x) && (iLine.o.x >= mp.ex)) { 341 xi = iLine.o.x;342 yi = mp.ey;343 }344 else {345 b1 = 0; 346 b2 = (iLine.d.y-iLine.o.y)/(iLine.d.x-iLine.o.x); 347 a1 = mp.ey-b1*mp.ex;348 a2 = iLine.o.y-b2*iLine.o.x;349 xi = - (a1-a2)/(b1-b2); 350 yi = a1+b1*xi; 351 }352 if (xi >= mp.ex) { 353 xcount += 1;354 }355 if (xcount == 2) {356 break;357 }358 }359 return xcount;360 };361 Canvas.Element.prototype.findTargetCorner = function(mp, oImg) {362 var xpoints = null;363 var corners = [‘tl‘,‘tr‘,‘br‘,‘bl‘];364 for (var i in oImg.oCoords) {365 xpoints = this._findCrossPoints(mp, this._getImageLines(oImg.oCoords[i].corner));366 if (xpoints % 2 == 1 && xpoints != 0) {367 return i;368 } 369 }370 return false;371 };372 Canvas.Element.prototype.findMousePosition = function(e) {373 var parentNode = (e.srcElement) ? e.srcElement.parentNode : e.target.parentNode;374 var isSafari2 = !S.support.ie&&!S.support.firefox;375 var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;376 var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;377 var safariOffsetLeft = (isSafari2) ? e.target.ownerDocument.body.offsetLeft + scrollLeft : 0;378 var safariOffsetTop = (isSafari2) ? e.target.ownerDocument.body.offsetTop + scrollTop : 0;379 return {380 ex: e.clientX + scrollLeft - parentNode.offsetLeft - safariOffsetLeft,381 ey: e.clientY + scrollTop - parentNode.offsetTop - safariOffsetTop,382 screenX: e.screenX,383 screenY: e.screenY384 };385 };386 Canvas.Element.prototype.drawBorder = function(context, oImg, offsetX, offsetY) {387 var outlinewidth = 2;388 context.fillStyle = ‘rgba(0, 0, 0, .3)‘;389 context.fillRect(-2 - offsetX, -2 - offsetY, oImg.width + (2 * outlinewidth), oImg.height + (2 * outlinewidth));390 context.fillStyle = ‘#fff‘;391 context.fillRect(-offsetX, -offsetY, oImg.width, oImg.height);392 };393 Canvas.Element.prototype.drawCorners = function(context, oImg, offsetX, offsetY) {394 context.fillStyle = "rgba(0, 200, 50, 0.5)";395 context.fillRect(-offsetX, -offsetY, oImg.cornersize, oImg.cornersize);396 context.fillRect(oImg.width - offsetX - oImg.cornersize, -offsetY, oImg.cornersize, oImg.cornersize);397 context.fillRect(-offsetX, oImg.height - offsetY - oImg.cornersize, oImg.cornersize, oImg.cornersize);398 context.fillRect(oImg.width - offsetX - oImg.cornersize, oImg.height - offsetY - oImg.cornersize, oImg.cornersize, oImg.cornersize);399 };400 Canvas.Element.prototype.clearCorners = function(context, oImg, offsetX, offsetY) {401 context.clearRect(-offsetX, -offsetY, oImg.cornersize, oImg.cornersize);402 context.clearRect(oImg.width - offsetX - oImg.cornersize, -offsetY, oImg.cornersize, oImg.cornersize);403 context.clearRect(-offsetX, oImg.height - offsetY - oImg.cornersize, oImg.cornersize, oImg.cornersize);404 context.clearRect(oImg.width - offsetX - oImg.cornersize, oImg.height - offsetY - oImg.cornersize, oImg.cornersize, oImg.cornersize);405 context.restore();406 };407 Canvas.Element.prototype.canvasTo = function(format) {408 this.renderAll(true,false);409 var containerCanvas =this._oContextTop;410 for (var i = 0, l = this._aImages.length; i < l; i += 1) {411 var offsetY = this._aImages[i].height / 2;412 var offsetX = this._aImages[i].width / 2;413 this.clearCorners(containerCanvas, this._aImages[i], offsetX, offsetY);414 }415 if (format == ‘jpeg‘ || format == ‘png‘) {416 return this._oElement.toDataURL(‘image/‘+format);417 }418 }; 419 Canvas.CustomEvent = function(type) {420 this.type = type;421 this.scope = null;422 this.handler = null;423 var self = this;424 this.fire = function(e) {425 if(this.handler != null) {426 self.handler.call(self.scope, e);427 }428 };429 }; 430 }());431 return Canvas;432 });
canvasImg.js
1 define(‘canvasImg‘, [ ‘../multi_upload/core‘ ], function(S) { 2 var Canvas = window.Canvas || {}; 3 (function () { 4 Canvas.Img = function(el, oConfig) { 5 this._initElement(el); 6 this._initConfig(oConfig); 7 this.setImageCoords(); 8 }; 9 Canvas.Img.CSS_CANVAS = "canvas-img"; 10 var DEFAULT_CONFIG = { 11 "TOP": { 12 key: "top", 13 value: 10 14 }, 15 "LEFT": { 16 key: "left", 17 value: 10 18 }, 19 "ANGLE": { 20 key: "angle", 21 value: 0 22 }, 23 "THETA": { 24 key: "theta", 25 value: 0 26 }, 27 "SCALE-X": { 28 key: "scalex", 29 value: 1 30 }, 31 "SCALE-Y": { 32 key: "scaley", 33 value: 1 34 }, 35 "CORNERSIZE": { 36 key: "cornersize", 37 value:10 38 }, 39 "BORDERWIDTH": { 40 key: "borderwidth", 41 value: 10 42 }, 43 "POLAROIDHEIGHT": { 44 key: "polaroidheight", 45 value: 40 46 }, 47 "RANDOMPOSITION": { 48 key: "randomposition", 49 value: true 50 } 51 }; 52 Canvas.Img.prototype._oElement = null; 53 Canvas.Img.prototype.top = null; 54 Canvas.Img.prototype.left = null; 55 Canvas.Img.prototype.maxwidth = null; 56 Canvas.Img.prototype.maxheight = null; 57 Canvas.Img.prototype.oCoords = null; 58 Canvas.Img.prototype.angle = null; 59 Canvas.Img.prototype.theta = null; 60 Canvas.Img.prototype.scalex = null; 61 Canvas.Img.prototype.scaley = null; 62 Canvas.Img.prototype.cornersize = null; 63 Canvas.Img.prototype.polaroidheight = null; 64 Canvas.Img.prototype.randomposition = null; 65 Canvas.Img.prototype.selected = false; 66 Canvas.Img.prototype.bordervisibility = false; 67 Canvas.Img.prototype.cornervisibility = false; 68 Canvas.Img.prototype._initElement = function(el) { 69 this._oElement = el; 70 }; 71 Canvas.Img.prototype._initConfig = function(oConfig) { 72 var sKey; 73 for (sKey in DEFAULT_CONFIG) { 74 var defaultKey = DEFAULT_CONFIG[sKey].key; 75 if (!oConfig.hasOwnProperty(defaultKey)) { // = !(defaultKey in oConfig) 76 this[defaultKey] = DEFAULT_CONFIG[sKey].value; 77 } 78 else { 79 this[defaultKey] = oConfig[defaultKey]; 80 } 81 } 82 if (this.bordervisibility) { 83 this.currentBorder = this.borderwidth; 84 } 85 else { 86 this.currentBorder = 0; 87 } 88 var normalizedSize = this.getNormalizedSize(this._oElement, parseInt(oConfig.maxwidth), parseInt(oConfig.maxheight)); 89 this._oElement.width = normalizedSize.width; 90 this._oElement.height = normalizedSize.height; 91 this.width = normalizedSize.width + (2 * this.currentBorder); 92 this.height = normalizedSize.height + (2 * this.currentBorder); 93 if (this.randomposition) { 94 this._setRandomProperties(oConfig); 95 } 96 this.theta = this.angle * (Math.PI/180); 97 }; 98 Canvas.Img.prototype.getNormalizedSize = function(oImg, maxwidth, maxheight) { 99 if (maxheight && maxwidth && (oImg.width > oImg.height && (oImg.width / oImg.height) < (maxwidth / maxheight))) {100 normalizedWidth = Math.floor((oImg.width * maxheight) / oImg.height);101 normalizedHeight = maxheight;102 }103 else if (maxheight && ((oImg.height == oImg.width) || (oImg.height > oImg.width) || (oImg.height > maxheight))) {104 normalizedWidth = Math.floor((oImg.width * maxheight) / oImg.height);105 normalizedHeight = maxheight;106 }107 else if (maxwidth && (maxwidth < oImg.width)){ 108 normalizedHeight = Math.floor((oImg.height * maxwidth) / oImg.width);109 normalizedWidth = maxwidth;110 }111 else {112 normalizedWidth = oImg.width;113 normalizedHeight = oImg.height; 114 }115 return { width: normalizedWidth, height: normalizedHeight }116 },117 Canvas.Img.prototype.getOriginalSize = function() {118 return { width: this._oElement.width, height: this._oElement.height }119 };120 Canvas.Img.prototype._setRandomProperties = function(oConfig) {121 if (oConfig.angle == null) {122 this.angle = (Math.random() * 90);123 }124 if (oConfig.top == null) {125 this.top = this.height / 2 + Math.random() * 450;126 }127 if (oConfig.left == null) {128 this.left = this.width / 2 + Math.random() * 600;129 }130 };131 Canvas.Img.prototype.setCornersVisibility = function(visible) {132 this.cornervisibility = visible;133 };134 Canvas.Img.prototype.setImageCoords = function() {135 this.left = parseInt(this.left);136 this.top = parseInt(this.top);137 this.currentWidth = parseInt(this.width) * this.scalex;138 this.currentHeight = parseInt(this.height) * this.scalex;139 this._hypotenuse = Math.sqrt(Math.pow(this.currentWidth / 2, 2) + Math.pow(this.currentHeight / 2, 2));140 this._angle = Math.atan(this.currentHeight / this.currentWidth);141 var offsetX = Math.cos(this._angle + this.theta) * this._hypotenuse;142 var offsetY = Math.sin(this._angle + this.theta) * this._hypotenuse;143 var theta = this.theta;144 var sinTh = Math.sin(theta);145 var cosTh = Math.cos(theta);146 var tl = {147 x: this.left - offsetX,148 y: this.top - offsetY149 };150 var tr = {151 x: tl.x + (this.currentWidth * cosTh),152 y: tl.y + (this.currentWidth * sinTh)153 };154 var br = {155 x: tr.x - (this.currentHeight * sinTh),156 y: tr.y + (this.currentHeight * cosTh)157 };158 var bl = {159 x: tl.x - (this.currentHeight * sinTh),160 y: tl.y + (this.currentHeight * cosTh)161 };162 this.oCoords = { tl: tl, tr: tr, br: br, bl: bl };163 this.setCornerCoords(); 164 };165 Canvas.Img.prototype.setCornerCoords = function() {166 var coords = this.oCoords;167 var theta = this.theta;168 var cosOffset = this.cornersize * this.scalex * Math.cos(theta);169 var sinOffset = this.cornersize * this.scalex * Math.sin(theta);170 coords.tl.corner = {171 tl: {172 x: coords.tl.x,173 y: coords.tl.y174 },175 tr: {176 x: coords.tl.x + cosOffset,177 y: coords.tl.y + sinOffset178 },179 bl: {180 x: coords.tl.x - sinOffset,181 y: coords.tl.y + cosOffset182 }183 };184 coords.tl.corner.br = {185 x: coords.tl.corner.tr.x - sinOffset,186 y: coords.tl.corner.tr.y + cosOffset187 };188 189 coords.tr.corner = {190 tl: {191 x: coords.tr.x - cosOffset,192 y: coords.tr.y - sinOffset193 },194 tr: {195 x: coords.tr.x,196 y: coords.tr.y197 },198 br: {199 x: coords.tr.x - sinOffset,200 y: coords.tr.y + cosOffset201 }202 };203 coords.tr.corner.bl = {204 x: coords.tr.corner.tl.x - sinOffset,205 y: coords.tr.corner.tl.y + cosOffset206 };207 208 coords.bl.corner = {209 tl: {210 x: coords.bl.x + sinOffset,211 y: coords.bl.y - cosOffset212 },213 bl: {214 x: coords.bl.x,215 y: coords.bl.y216 },217 br: {218 x: coords.bl.x + cosOffset,219 y: coords.bl.y + sinOffset220 }221 };222 coords.bl.corner.tr = {223 x: coords.bl.corner.br.x + sinOffset,224 y: coords.bl.corner.br.y - cosOffset225 };226 227 coords.br.corner = {228 tr: {229 x: coords.br.x + sinOffset,230 y: coords.br.y - cosOffset231 },232 bl: {233 x: coords.br.x - cosOffset,234 y: coords.br.y - sinOffset235 },236 br: {237 x: coords.br.x,238 y: coords.br.y239 }240 };241 coords.br.corner.tl = {242 x: coords.br.corner.bl.x + sinOffset,243 y: coords.br.corner.bl.y - cosOffset244 };245 };246 }());247 return Canvas;248 });
puzzle.html
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5 <title>Insert title here</title> 6 <link type="text/css" href="http://www.mamicode.com/html5_puzzle.css" rel="stylesheet" /> 7 <script type="text/javascript" src="http://www.mamicode.com/multi_upload/seed.js"></script> 8 <script type="text/javascript" src=http://www.mamicode.com/‘html5_puzzle.js‘></script>"color: #008080;"> 9 </head>10 <body>11 <div id=‘html5_puzzle‘>12 <div id=‘puzzle_left‘>13 <div class=‘puzzle_column‘>14 <ul>15 <li><img src=http://www.mamicode.com/‘small_img/1.jpg‘ data-index=‘1‘ />"color: #008080;">16 <li><img src=http://www.mamicode.com/‘small_img/2.jpg‘ data-index=‘2‘ />"color: #008080;">17 <li><img src=http://www.mamicode.com/‘small_img/3.jpg‘ data-index=‘3‘ />"color: #008080;">18 <li><img src=http://www.mamicode.com/‘small_img/4.jpg‘ data-index=‘4‘ />"color: #008080;">19 <li><img src=http://www.mamicode.com/‘small_img/5.jpg‘ data-index=‘5‘ />"color: #008080;">20 </ul>21 </div>22 <div class=‘puzzle_column‘>23 <ul>24 <li><img src=http://www.mamicode.com/‘small_img/6.jpg‘ data-index=‘6‘ />"color: #008080;">25 <li><img src=http://www.mamicode.com/‘small_img/7.jpg‘ data-index=‘7‘ />"color: #008080;">26 <li><img src=http://www.mamicode.com/‘small_img/8.jpg‘ data-index=‘8‘ />"color: #008080;">27 <li><img src=http://www.mamicode.com/‘small_img/9.jpg‘ data-index=‘9‘ />"color: #008080;">28 <li><img src=http://www.mamicode.com/‘small_img/10.jpg‘ data-index=‘10‘ />"color: #008080;">29 </ul>30 </div>31 </div>32 <div id=‘puzzle_right‘>33 <div id=‘puzzle_canvas‘>34 <canvas id="canvid1"></canvas>35 <div id=‘canvas_menu‘>36 <a href=‘javascript:void(0)‘ id=‘photo_delete‘>删除</a> <a37 href=‘javascript:void(0)‘ id=‘photo_update‘>更改图片</a>38 </div>39 </div>40 <img id="bg" src="http://www.mamicode.com/big_img/1.jpg" width=‘600‘ height=‘450‘ />41 </div>42 <div id=‘puzzle_bottom‘>43 <a href=‘javascript:void(0)‘ id=‘add_img‘><span>添加图片</span><input44 type="file" multiple="" id=‘fileImage‘> </a> <a45 href=‘javascript:void(0)‘ id=‘upload_btn‘>上传</a> <a>点击图片可以旋转,拖拽,46 缩放哦!</a>47 </div>48 </div>49 <input type="file" id=‘test‘>50 <canvas id=‘test_canvas‘></canvas>51 </body>52 </html>
html5_puzzle.css
1 @CHARSET "UTF-8"; 2 3 #html5_puzzle { 4 font-size: 0; 5 } 6 7 canvas { 8 background-color: transparent; 9 left: 0;10 position: absolute;11 top: 0;12 }13 14 .puzzle_column,#puzzle_left,#puzzle_right,#add_img {15 display: inline-block;16 }17 18 .puzzle_column li {19 display: block;20 margin: 5px;21 border: 1px solid #ffffff;22 }23 24 .puzzle_column li:hover {25 border: 1px solid #3B5998;26 cursor: pointer;27 }28 29 .puzzle_column {30 font-size: 0;31 }32 33 #puzzle_left,#puzzle_right {34 border: 1px solid #3B5998;35 }36 37 #puzzle_right,#puzzle_bottom a {38 font-size: 14px;39 margin: 10px 0 0 10px;40 }41 42 #puzzle_bottom {43 margin: 5px 0;44 }45 46 #puzzle_canvas img {47 48 }49 50 #puzzle_canvas {51 overflow: hidden;52 width: 600px;53 height: 450px;54 position: relative;55 }56 57 #add_img input {58 position: absolute;59 font-size: 100px;60 right: 0;61 top: 0;62 opacity: 0;63 }64 65 #add_img {66 position: relative;67 display: inline-block;68 background: #3B5998;69 border-radius: 4px;70 padding: 4px 12px;71 overflow: hidden;72 color: #ffffff;73 }74 75 #bg,#show_list {76 display: none;77 }78 79 #canvas_menu {80 border: 1px solid red;81 position: absolute;82 z-index: 5;83 top: 0;84 left: 0;85 display: none;86 }87 88 #canvas_menu a {89 display: inline-block;90 }91 92 #test_canvas {93 top: 700px;94 }
html5_puzzle.js
1 require([ ‘img_upload‘, ‘../puzzle/canvasImg‘, ‘../puzzle/canvasElement‘ ], function( 2 S, canvasImg, canvasElement) { 3 var img=[]; 4 var canvas = new canvasElement.Element(); 5 canvas.init(‘canvid1‘, { 6 width : 600, 7 height : 450 8 }); 9 S(‘.puzzle_column img‘).on(‘click‘,function(e){ 10 var index=this.getAttribute(‘data-index‘); 11 $(‘bg‘).onload = function() { 12 var ctx=$(‘canvid1-canvas-background‘).getContext(‘2d‘); 13 ctx.clearRect(0, 0,600,450); 14 img[0]=new canvasImg.Img($(‘bg‘), {}); 15 canvas.setCanvasBackground(img[0]); 16 }; 17 $(‘bg‘).setAttribute(‘src‘,‘medium_img/‘+index+‘.jpg‘); 18 e.stopPropagation(); 19 }); 20 var CanvasDemo = function() { 21 return { 22 init : function() { 23 var img_list=dom.query(‘#puzzle_canvas img‘); 24 img[0]=new canvasImg.Img($(‘bg‘), {}); 25 S.each(img_list,function(i,el){ 26 el.setAttribute(‘data-index‘,i); 27 img.push(new canvasImg.Img(el, {})); 28 canvas.addImage(img[i+1]); 29 }); 30 canvas.setCanvasBackground(img[0]); 31 this.cornersvisible = (this.cornersvisible) ? false : true; 32 this.modifyImages(function(image) { 33 image.setCornersVisibility(this.cornersvisible); 34 }); 35 }, 36 modifyImages : function(fn) { 37 for ( var i =0, l = canvas._aImages.length; i < l; i += 1) { 38 fn.call(this, canvas._aImages[i]); 39 } 40 canvas.renderAll(false,false); 41 S(‘#puzzle_canvas img‘).remove(); 42 img = []; 43 } 44 }; 45 }(); 46 function getCurImg(){ 47 var oImg=canvas._prevTransform.target; 48 for(var i=0;i<canvas._aImages.length;i++){ 49 if(canvas._aImages[i]._oElement.src=http://www.mamicode.com/=oImg._oElement.src){ 50 return i; 51 } 52 } 53 } 54 S(‘#photo_delete‘).on(‘click‘,function(e){ 55 var i=getCurImg(); 56 canvas._aImages.splice(i,1); 57 canvas.renderAll(true,true); 58 $(‘canvas_menu‘).style.display="none"; 59 }); 60 S(‘#photo_update‘).on(‘click‘,function(e){ 61 $(‘test‘).click(); 62 }); 63 S(‘#test‘).on(‘change‘,function(e){ 64 var files = e.target.files || e.dataTransfer.files; 65 var reader = new FileReader(); 66 reader.onload = (function() { 67 return function(e) { 68 var dataURL = e.target.result, canvas1 = document.querySelector(‘#test_canvas‘), ctx = canvas1.getContext(‘2d‘), img = new Image(); 69 img.onload = function(e) { 70 if(img.width>200||img.height>200){ 71 var prop=Math.min(200/img.width,200/img.height); 72 img.width=img.width*prop; 73 img.height=img.height*prop; 74 } 75 canvas1.width=img.width; 76 canvas1.height=img.height; 77 ctx.drawImage(img, 0, 0, img.width, img.height); 78 S(‘#canvid1‘).html(S(‘#canvid1‘).html()+"<img src=http://www.mamicode.com/‘"+canvas1.toDataURL("image/jpeg")+"‘/>"); 79 var t = window.setTimeout(function() { 80 var i=getCurImg(),target=canvas._prevTransform.target; 81 console.log(target); 82 canvas._aImages[i]=new canvasImg.Img(dom.query(‘#canvid1 img‘)[0], { 83 top:target.top, 84 left:target.left, 85 scalex:target.scalex, 86 scaley:target.scaley, 87 angle:canvas.curAngle 88 }); 89 canvas.renderTop(); 90 clearTimeout(t); 91 S(‘#canvid1 img‘).remove(); 92 },1000); 93 }; 94 img.src =http://www.mamicode.com/ dataURL; 95 }; 96 })(); 97 reader.readAsDataURL(files[0]); 98 }); 99 S(‘#upload_btn‘).on(‘click‘,function(){100 var imgData = http://www.mamicode.com/canvas.canvasTo(‘jpeg‘);101 var imgValue = http://www.mamicode.com/imgData.substr(22);102 S.ajax({103 url : ‘http://localhost/html5/upload1.php‘,104 type : ‘POST‘,105 data : {106 imgData : imgValue,107 file_name :‘mix_img.jpeg‘108 },109 dataType : ‘text‘,110 success : function(data) {111 alert("s");112 }113 });114 });115 });
至于用html5 input读取图片,这很简单就不贴出来了
html5版canvas自由拼图
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