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// Copyright 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
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//
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/*
// +----------------------------------------------------------------------+
// | Copyright (c) 2008- deviantART Inc.                                  |
// +----------------------------------------------------------------------+
// | This source file is bound by United States copyright law.            |
// +----------------------------------------------------------------------+
// | Author: Michael Dewey <mudimba@deviantart.com>                       |
// +----------------------------------------------------------------------+
// |  Library for using <canvas/> to skew images for perspective effects  |
// +----------------------------------------------------------------------+
*/
}var Point=Base.extend({constructor:function(B,A){this.x=B;this.y=A},rotate:function(C){var D=Math.cos(C);var B=Math.sin(C);var A=(D*this.x)-(B*this.y);var E=(B*this.x)+(D*this.y);return new Point(A,E)},translate:function(B){var A=this.x-B.x;var C=this.y-B.y;return new Point(A,C)}});var Line=Base.extend({constructor:function(B,A){this.point=B;if(B.x==A.x){if(B.y>A.y){this.slope=-1e+23}else{this.slope=1e+23}}else{this.slope=(B.y-A.y)/(B.x-A.x)}},getPoint:function(A){var B=this.slope*(A-this.point.x)+this.point.y;return new Point(A,B)},getIntersection:function(B){if(this.slope==B.slope){stdLog("ERROR: ASKED TO CALCULATE INTERSECTION OF PARALLEL LINES");return null}if(this.slope>10000||this.slope<-10000){return B.getPoint(this.point.x)}else{if(B.slope>10000||B.slope<-10000){return this.getPoint(B.point.x)}}var A=(this.point.y-B.point.y+(B.slope*B.point.x)-(this.slope*this.point.x))/(B.slope-this.slope);return this.getPoint(A)},angleFromVertical:function(){var A;try{var C=Math.atan(-1*this.slope);if(C>=0){A=C-(Math.PI/2)}else{A=C+(Math.PI/2)}}catch(B){stdLog("Infinite slope");return 0}return parseFloat(A)}});var Quadrangle=Base.extend({constructor:function(B,C,D,A){this.UL=B;this.LL=C;this.UR=D;this.LR=A},getCenter:function(){var B=new Line(this.UL,this.LR);var A=new Line(this.LL,this.UR);return B.getIntersection(A)},getCenterTop:function(){var B=new Line(this.UL,this.UR);var A=this.getCenter();return B.getPoint(A.x)},getCenterBottom:function(){var B=new Line(this.LL,this.LR);var A=this.getCenter();return B.getPoint(A.x)},getCenterLeft:function(){var B=new Line(this.UL,this.LL);if(B.slope>10000||B.slope<-10000){return new Point(this.UL.x,(this.UL.y+(this.LL.y-this.UL.y)/2))}var A=this.getCenter();return B.getPoint(A.y)},getCenterRight:function(){var B=new Line(this.UR,this.LR);if(B.slope>10000||B.slope<-10000){return new Point(this.UR.x,(this.UR.y+(this.LR.y-this.UR.y)/2))}var A=this.getCenter();return B.getPoint(A.y)},getCenterLine:function(){var D=new Line(this.UL,this.UR);var C=D.getPoint(this.UL.x+(this.UR.x-this.UL.x)/2);var B=new Line(this.LL,this.LR);var A=B.getPoint(this.LL.x+(this.LR.x-this.LL.x)/2);return new Line(A,C)},getVertVanishingPoint:function(){var B=new Line(this.UL,this.LL);var C=new Line(this.UR,this.LR);if(B.slope==C.slope){var A=this.getCenter();A.y+=B.slope;A.x+=1;return A}return B.getIntersection(C)},getHorizVanishingPoint:function(){var C=new Line(this.UL,this.UR);var B=new Line(this.LL,this.LR);if(C.slope==B.slope){var A=this.getCenter();A.y+=C.slope;A.x+=1;return A}return C.getIntersection(B)},rotate:function(B){var C=this.UL.rotate(B);var E=this.UR.rotate(B);var D=this.LL.rotate(B);var A=this.LR.rotate(B);return new Quadrangle(C,D,E,A)},translate:function(A){var C=this.UL.translate(A);var E=this.UR.translate(A);var D=this.LL.translate(A);var B=this.LR.translate(A);return new Quadrangle(C,D,E,B)},straightenSides:function(){var B=this.UL;var C=this.LL;var D=this.UR;var A=this.LR;if(B.x>C.x){B.x=C.x}else{C.x=B.x}if(D.x<A.x){D.x=A.x}else{A.x=D.x}return new Quadrangle(B,C,D,A)},roundToInt:function(){this.UL.x=Math.floor(this.UL.x);this.UL.y=Math.floor(this.UL.y);this.LL.x=Math.floor(this.LL.x);this.LL.y=Math.ceil(this.LL.y);this.UR.x=Math.ceil(this.UR.x);this.UR.y=Math.floor(this.UR.y);this.LR.x=Math.ceil(this.LR.x);this.LR.y=Math.ceil(this.LR.y)},centerSlice:function(A,B){return this.translate(A).rotate(B).straightenSides()}});var Crop=Base.extend({constructor:function(C,D,A,B){this.t=C/100;this.r=D/100;this.b=A/100;this.l=B/100},doCrop:function(B){var E=B.UR.x-B.UL.x;var A=B.LL.y-B.UL.y;var D=new Point((B.UL.x+(E*this.l)),(B.UL.y+(A*this.t)));var G=new Point((B.UR.x-(E*this.r)),(B.UR.y+(A*this.t)));var F=new Point((B.LL.x+(E*this.l)),(B.LL.y-(A*this.b)));var C=new Point((B.LR.x-(E*this.r)),(B.LL.y-(A*this.b)));return new Quadrangle(D,F,G,C)}});var Canvas=Base.extend({constructor:function(A){this.logger=new StdLogger("Canvas");this.canvas=$j(A);this.context=null;this.didInit=false},init:function(C,A,B){if(this.didInit&&!B){return }try{G_vmlCanvasManager.initElement(this.canvas.get(0))}catch(D){}this.canvas.width(C);this.canvas.height(A);this.canvas.attr("width",C);this.canvas.attr("height",A);this.canvasWidth=$j(this.canvas).width();this.canvasHeight=$j(this.canvas).height();this.context=this.canvas.get(0).getContext("2d");this.context.clearRect(0,0,C,A);this.didInit=true}});var Mask=Base.extend({constructor:function(B,A,D,C){this.logger=new StdLogger("Mask");this.img=B;this.maskCoords=A;this.canvas=C;this.naturalAspect=D;this._getImageProperties();this.targetImageHeight=this.imageHeight},_getImageProperties:function(){this.imageWidth=$j(this.img).width();this.imageHeight=$j(this.img).height()},stretch:function(A,B){this.high_y=Math.max(this.maskCoords.UL.y,this.maskCoords.UR.y);this.low_y=Math.min(this.maskCoords.LL.y,this.maskCoords.LR.y);if(this.maskCoords.UL.y<this.maskCoords.UR.y){naturalHeight=this.maskCoords.LR.y-this.maskCoords.UR.y}else{naturalHeight=this.maskCoords.LL.y-this.maskCoords.UL.y}targetHeight=Math.ceil(naturalHeight*this.naturalAspect/A);this.targetImageHeight=(this.imageHeight-naturalHeight)+targetHeight;this.canvas.init(this.imageWidth,this.targetImageHeight,false);this.context=this.canvas.context;rUL=new Point(this.maskCoords.UL.x,this.maskCoords.UL.y);rUR=new Point(this.maskCoords.UR.x,this.maskCoords.UR.y);if(this.maskCoords.UL.y<this.maskCoords.UR.y){rLR=new Point(this.maskCoords.LR.x,this.maskCoords.UR.y+targetHeight);rLL=new Point(this.maskCoords.LL.x,this.maskCoords.LL.y+(rLR.y-this.maskCoords.LR.y))}else{rLL=new Point(this.maskCoords.LL.x,this.maskCoords.UL.y+targetHeight);rLR=new Point(this.maskCoords.LR.x,this.maskCoords.LR.y+(rLL.y-this.maskCoords.LL.y))}destQuad=new Quadrangle(rUL,rLL,rUR,rLR);return destQuad},drawMask:function(){this.context.drawImage(this.img,0,this.high_y+5,this.imageWidth,(this.low_y-this.high_y-10),0,this.high_y+5,this.imageWidth,targetHeight-10);this.context.drawImage(this.img,0,0,this.imageWidth,this.high_y+6,0,0,this.imageWidth,this.high_y+6);this.context.drawImage(this.img,0,this.low_y-6,this.imageWidth,(this.imageHeight-this.low_y+6),0,(this.high_y+targetHeight-6),this.imageWidth,(this.imageHeight-this.low_y+6))}});var ThreeDImage=Base.extend({constructor:function(A,B){this.logger=new StdLogger("3DImage");this.img=A;this.canvas=B;this.canvasWidth=this.canvas.canvas.width();this.canvasHeight=this.canvas.canvas.height();this.canvas.init(this.canvasWidth,this.canvasHeight,false);this.context=this.canvas.context;this._getImageProperties();this.stepSize=20;this.max_depth=4},setMaxDepth:function(A){this.max_depth=Math.max(2,A)},_getImageProperties:function(){this.imageWidth=$j(this.img).width();this.imageHeight=$j(this.img).height();this.imageAspect=this.imageHeight/this.imageWidth},_drawSteps:function(U,M){var C=1;var B=20;var L=1;var K=2;var I=new Date();U.roundToInt();M.roundToInt();var P=U.LR.x-U.UL.x;var E=U.LR.y-U.UL.y;var J=M.UR.x-M.UL.x;var X=J/P;var F=M.LL.y-M.UL.y;var W=M.LR.y-M.UR.y;var R=U.UL.y;var D=Math.ceil(X*this.stepSize)+1;var S,O,N,Q;var T=(W-F)/P;var H=Math.max(this.stepSize,Math.floor(Math.abs(P/(W-F))));for(var V=0;V<P;V=V+H){S=U.UL.x+V;sWidth=Math.min(this.imageWidth-S,H);O=Math.floor(M.UL.x+(V*X));N=M.UL.y+Math.floor(V*(M.UR.y-M.UL.y)/P);Q=Math.ceil(F+(V*T));this.context.drawImage(this.img,S,R,sWidth,E,O,N,D,Q)}var G=new Date();var A=(G.getTime()-I.getTime()+1)/P;if(A<=L&&this.stepSize>C){this.stepSize=Math.max(C,(this.stepSize-1))}else{if(A>=K&&this.stepSize<B){this.stepSize=Math.min(20,(this.stepSize+1))}}},_perspectiveStep:function(E,A,K){if(E>=this.max_depth){this._drawSteps(A,K);return }else{try{var L=A.getCenterTop();var F=A.getCenterBottom();var J=new Quadrangle(A.UL,A.LL,L,F);var B=new Quadrangle(L,F,A.UR,A.LR);var I=K.getCenterTop();var D=K.getCenterBottom();var H=new Quadrangle(K.UL,K.LL,I,D);var C=new Quadrangle(I,D,K.UR,K.LR);this._perspectiveStep(E+1,J,H);this._perspectiveStep(E+1,B,C)}catch(G){this.logger.log("STEPS TOO SMALL, should use lower MAX_DEPTH",G);this._drawSteps(A,K)}}},_perspectiveSkew:function(f,N,J){var b=3;if(f>=b){this._drawSkew(N,J);return }else{try{var R=N.getCenter();var F=N.getCenterTop();var T=N.getCenterBottom();var P=N.getCenterLeft();var d=N.getCenterRight();var Z=new Quadrangle(N.UL,P,F,R);var S=new Quadrangle(F,R,N.UR,d);var X=new Quadrangle(P,N.LL,R,T);var Q=new Quadrangle(R,T,d,N.LR);var M=J.getCenter();var H=J.getVertVanishingPoint();var K=J.getHorizVanishingPoint();var V=new Line(M,K);var I=new Line(M,H);var Y=new Line(J.UL,J.UR);var c=new Line(J.LL,J.LR);var O=new Line(J.UL,J.LL);var E=new Line(J.UR,J.LR);var C=Y.getIntersection(I);var B=c.getIntersection(I);var L=O.getIntersection(V);var U=E.getIntersection(V);var G=new Quadrangle(J.UL,L,C,M);var A=new Quadrangle(C,M,J.UR,U);var D=new Quadrangle(L,J.LL,M,B);var a=new Quadrangle(M,B,U,J.LR);this._perspectiveSkew(f+1,Z,G);this._perspectiveSkew(f+1,S,A);this._perspectiveSkew(f+1,X,D);this._perspectiveSkew(f+1,Q,a)}catch(W){this.logger.log("STEPS TOO SMALL, should use lower MAX_DEPTH");this._drawSkew(N,J)}}},_drawSkew:function(V,O){V.roundToInt();O.roundToInt();var R=V.LR.x-V.UL.x;var F=V.LR.y-V.UL.y;var B=O.UR.x-O.UL.x;var A=B/R;var b=O.LR.x-O.LL.x;var C=b/R;var G=O.LL.y-O.UL.y;var X=O.LR.y-O.UR.y;var T=V.UL.y;var c=Math.ceil(A*this.stepSize)+1;var a=Math.ceil(C*this.stepSize)+1;var Z=new Line(O.UL,O.UR);var d=new Line(O.LL,O.LR);var U,P,Q;var K,N,J,M,I;var f,H,L,E,D,S;for(var W=0;W<R;W=W+this.stepSize){U=V.UL.x+W;P=O.UL.x+(W*A);Q=O.LL.x+(W*C);N=Z.getPoint(P);J=Z.getPoint(P+c);M=d.getPoint(Q);I=d.getPoint(Q+a);K=new Quadrangle(N,M,J,I);this.context.save();f=K.getCenter();H=K.getCenterLine();L=H.angleFromVertical();this.context.translate(f.x,f.y);this.context.rotate(-1*L);var g=K.translate(f);var E=g.rotate(L).straightenSides();D=E.UR.x-E.UL.x;S=E.LL.y-E.UL.y;try{this.context.drawImage(this.img,U,T,this.stepSize,F,E.UL.x,E.UL.y,D,S)}catch(Y){stdLog("Error in draw image")}this.context.restore()}},perspective:function(A,B){sUL=new Point(0,0);sLL=new Point(0,this.imageHeight);sUR=new Point(this.imageWidth,0);sLR=new Point(this.imageWidth,this.imageHeight);origQuad=new Quadrangle(sUL,sLL,sUR,sLR);if(!B){source=origQuad}else{source=B.doCrop(origQuad)}this._perspectiveStep(1,source,A,this.max_depth)},jitter:function(A,C){sUL=new Point(0,0);sLL=new Point(0,this.imageHeight);sUR=new Point(this.imageWidth,0);sLR=new Point(this.imageWidth,this.imageHeight);origQuad=new Quadrangle(sUL,sLL,sUR,sLR);if(!C){source=origQuad}else{source=C.doCrop(origQuad)}var B=1;this.context.globalAlpha=0.4;aliasQuad=A;aliasQuad.UL.y-=B;aliasQuad.LL.y-=B;aliasQuad.UR.y-=B;aliasQuad.LR.y-=B;this.perspective(aliasQuad);aliasQuad=A;aliasQuad.UL.y+=B;aliasQuad.LL.y+=B;aliasQuad.UR.y+=B;aliasQuad.LR.y+=B;this.perspective(aliasQuad);this.context.globalAlpha=1},perspectiveSkew:function(A,B){sUL=new Point(0,0);sLL=new Point(0,this.imageHeight);sUR=new Point(this.imageWidth,0);sLR=new Point(this.imageWidth,this.imageHeight);origQuad=new Quadrangle(sUL,sLL,sUR,sLR);if(!B){source=origQuad}else{source=B.doCrop(origQuad)}this._perspectiveSkew(1,source,A)},drawPerspective:function(){sUL=new Point(0,0);sLL=new Point(0,this.imageHeight);sUR=new Point(this.imageWidth,0);sLR=new Point(this.imageWidth,this.imageHeight);source=new Quadrangle(sUL,sLL,sUR,sLR);dUL=new Point(0,80);dLL=new Point(0,this.canvasHeight-80);dUR=new Point(this.canvasWidth,0);dLR=new Point(this.canvasWidth,this.canvasHeight);var A=new Quadrangle(dUL,dLL,dUR,dLR);this._perspectiveStep(1,source,A)},drawSkew_perspective:function(){sUL=new Point(0,0);sLL=new Point(0,this.imageHeight);sUR=new Point(this.imageWidth,0);sLR=new Point(this.imageWidth,this.imageHeight);source=new Quadrangle(sUL,sLL,sUR,sLR);dUL=new Point(100,80);dLL=new Point(0,this.canvasHeight);dUR=new Point(this.canvasWidth-50,0);dLR=new Point(this.canvasWidth-10,this.canvasHeight-100);var A=new Quadrangle(dUL,dLL,dUR,dLR);this._perspectiveSkew(1,source,A)}});if(window.DWait){DWait.run("jms/lib/3D.js")};