/*
	Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
	Available via Academic Free License >= 2.1 OR the modified BSD license.
	see: http://dojotoolkit.org/license for details
*/


if(!dojo._hasResource["dojox.gfx.gradutils"]){dojo._hasResource["dojox.gfx.gradutils"]=true;dojo.provide("dojox.gfx.gradutils");dojo.require("dojox.gfx.matrix");(function(){var d=dojo,m=dojox.gfx.matrix,C=d.Color;function _1(o,c){if(o<=0){return c[0].color;}var _2=c.length;if(o>=1){return c[_2-1].color;}for(var i=0;i<_2;++i){var _3=c[i];if(_3.offset>=o){if(i){var _4=c[i-1];return d.blendColors(new C(_4.color),new C(_3.color),(o-_4.offset)/(_3.offset-_4.offset));}return _3.color;}}return c[_2-1].color;};dojox.gfx.gradutils.getColor=function(_5,pt){var o;if(_5){switch(_5.type){case "linear":var _6=Math.atan2(_5.y2-_5.y1,_5.x2-_5.x1),_7=m.rotate(-_6),_8=m.project(_5.x2-_5.x1,_5.y2-_5.y1),p=m.multiplyPoint(_8,pt),_9=m.multiplyPoint(_8,_5.x1,_5.y1),_a=m.multiplyPoint(_8,_5.x2,_5.y2),_b=m.multiplyPoint(_7,_a.x-_9.x,_a.y-_9.y).x,o=m.multiplyPoint(_7,p.x-_9.x,p.y-_9.y).x/_b;break;case "radial":var dx=pt.x-_5.cx,dy=pt.y-_5.cy,o=Math.sqrt(dx*dx+dy*dy)/_5.r;break;}return _1(o,_5.colors);}return new C(_5||[0,0,0,0]);};dojox.gfx.gradutils.reverse=function(_c){if(_c){switch(_c.type){case "linear":case "radial":_c=dojo.delegate(_c);if(_c.colors){var c=_c.colors,l=c.length,i=0,_d,n=_c.colors=new Array(c.length);for(;i<l;++i){_d=c[i];n[i]={offset:1-_d.offset,color:_d.color};}n.sort(function(a,b){return a.offset-b.offset;});}break;}}return _c;};})();}