tapestry/tapestry-framework/src/js/dojo-0.4.3/src/gfx/Colorspace.js

dojo.provide("dojo.gfx.Colorspace");
dojo.require("dojo.lang.common");
dojo.require("dojo.math.matrix");
dojo.gfx.Colorspace=function(){
this.whitePoint="D65";
this.stdObserver="10";
this.chromaticAdaptationAlg="bradford";
this.RGBWorkingSpace="s_rgb";
this.useApproxCIELabMapping=1;
this.chainMaps={"RGB_to_xyY":["XYZ"],"xyY_to_RGB":["XYZ"],"RGB_to_Lab":["XYZ"],"Lab_to_RGB":["XYZ"],"RGB_to_LCHab":["XYZ","Lab"],"LCHab_to_RGB":["Lab"],"xyY_to_Lab":["XYZ"],"Lab_to_xyY":["XYZ"],"XYZ_to_LCHab":["Lab"],"LCHab_to_XYZ":["Lab"],"xyY_to_LCHab":["XYZ","Lab"],"LCHab_to_xyY":["Lab","XYZ"],"RGB_to_Luv":["XYZ"],"Luv_to_RGB":["XYZ"],"xyY_to_Luv":["XYZ"],"Luv_to_xyY":["XYZ"],"Lab_to_Luv":["XYZ"],"Luv_to_Lab":["XYZ"],"LCHab_to_Luv":["Lab","XYZ"],"Luv_to_LCHab":["XYZ","Lab"],"RGB_to_LCHuv":["XYZ","Luv"],"LCHuv_to_RGB":["Luv","XYZ"],"XYZ_to_LCHuv":["Luv"],"LCHuv_to_XYZ":["Luv"],"xyY_to_LCHuv":["XYZ","Luv"],"LCHuv_to_xyY":["Luv","XYZ"],"Lab_to_LCHuv":["XYZ","Luv"],"LCHuv_to_Lab":["Luv","XYZ"],"LCHab_to_LCHuv":["Lab","XYZ","Luv"],"LCHuv_to_LCHab":["Luv","XYZ","Lab"],"XYZ_to_CMY":["RGB"],"CMY_to_XYZ":["RGB"],"xyY_to_CMY":["RGB"],"CMY_to_xyY":["RGB"],"Lab_to_CMY":["RGB"],"CMY_to_Lab":["RGB"],"LCHab_to_CMY":["RGB"],"CMY_to_LCHab":["RGB"],"Luv_to_CMY":["RGB"],"CMY_to_Luv":["RGB"],"LCHuv_to_CMY":["RGB"],"CMY_to_LCHuv":["RGB"],"XYZ_to_HSL":["RGB"],"HSL_to_XYZ":["RGB"],"xyY_to_HSL":["RGB"],"HSL_to_xyY":["RGB"],"Lab_to_HSL":["RGB"],"HSL_to_Lab":["RGB"],"LCHab_to_HSL":["RGB"],"HSL_to_LCHab":["RGB"],"Luv_to_HSL":["RGB"],"HSL_to_Luv":["RGB"],"LCHuv_to_HSL":["RGB"],"HSL_to_LCHuv":["RGB"],"CMY_to_HSL":["RGB"],"HSL_to_CMY":["RGB"],"CMYK_to_HSL":["RGB"],"HSL_to_CMYK":["RGB"],"XYZ_to_HSV":["RGB"],"HSV_to_XYZ":["RGB"],"xyY_to_HSV":["RGB"],"HSV_to_xyY":["RGB"],"Lab_to_HSV":["RGB"],"HSV_to_Lab":["RGB"],"LCHab_to_HSV":["RGB"],"HSV_to_LCHab":["RGB"],"Luv_to_HSV":["RGB"],"HSV_to_Luv":["RGB"],"LCHuv_to_HSV":["RGB"],"HSV_to_LCHuv":["RGB"],"CMY_to_HSV":["RGB"],"HSV_to_CMY":["RGB"],"CMYK_to_HSV":["RGB"],"HSV_to_CMYK":["RGB"],"HSL_to_HSV":["RGB"],"HSV_to_HSL":["RGB"],"XYZ_to_CMYK":["RGB"],"CMYK_to_XYZ":["RGB"],"xyY_to_CMYK":["RGB"],"CMYK_to_xyY":["RGB"],"Lab_to_CMYK":["RGB"],"CMYK_to_Lab":["RGB"],"LCHab_to_CMYK":["RGB"],"CMYK_to_LCHab":["RGB"],"Luv_to_CMYK":["RGB"],"CMYK_to_Luv":["RGB"],"LCHuv_to_CMYK":["RGB"],"CMYK_to_LCHuv":["RGB"]};
return this;
};
dojo.gfx.Colorspace.prototype.convert=function(_1,_2,_3){
var k=_2+"_to_"+_3;
if(this[k]){
return this[k](_1);
}else{
if(this.chainMaps[k]){
var _5=_2;
var _6=this.chainMaps[k].concat();
_6.push(_3);
for(var i=0;i<_6.length;i++){
_1=this.convert(_1,_5,_6[i]);
_5=_6[i];
}
return _1;
}else{
dojo.debug("Can't convert from "+_2+" to "+_3);
}
}
};
dojo.gfx.Colorspace.prototype.munge=function(_8,_9){
if(dojo.lang.isArray(_9[0])){
_9=_9[0];
}
var _a=new Array();
for(var i=0;i<_8.length;i++){
_a[_8.charAt(i)]=_9[i];
}
return _a;
};
dojo.gfx.Colorspace.prototype.getWhitePoint=function(){
var x=0;
var y=0;
var t=0;
switch(this.stdObserver){
case "2":
switch(this.whitePoint){
case "E":
x=1/3;
y=1/3;
t=5400;
break;
case "D50":
x=0.34567;
y=0.3585;
t=5000;
break;
case "D55":
x=0.33242;
y=0.34743;
t=5500;
break;
case "D65":
x=0.31271;
y=0.32902;
t=6500;
break;
case "D75":
x=0.29902;
y=0.31485;
t=7500;
break;
case "A":
x=0.44757;
y=0.40745;
t=2856;
break;
case "B":
x=0.34842;
y=0.35161;
t=4874;
break;
case "C":
x=0.31006;
y=0.31616;
t=6774;
break;
case "9300":
x=0.2848;
y=0.2932;
t=9300;
break;
case "F2":
x=0.37207;
y=0.37512;
t=4200;
break;
case "F7":
x=0.31285;
y=0.32918;
t=6500;
break;
case "F11":
x=0.38054;
y=0.37691;
t=4000;
break;
default:
dojo.debug("White point "+this.whitePoint+" isn't defined for Std. Observer "+this.strObserver);
}
break;
case "10":
switch(this.whitePoint){
case "E":
x=1/3;
y=1/3;
t=5400;
break;
case "D50":
x=0.34773;
y=0.35952;
t=5000;
break;
case "D55":
x=0.33411;
y=0.34877;
t=5500;
break;
case "D65":
x=0.31382;
y=0.331;
t=6500;
break;
case "D75":
x=0.29968;
y=0.3174;
t=7500;
break;
case "A":
x=0.45117;
y=0.40594;
t=2856;
break;
case "B":
x=0.3498;
y=0.3527;
t=4874;
break;
case "C":
x=0.31039;
y=0.31905;
t=6774;
break;
case "F2":
x=0.37928;
y=0.36723;
t=4200;
break;
case "F7":
x=0.31565;
y=0.32951;
t=6500;
break;
case "F11":
x=0.38543;
y=0.3711;
t=4000;
break;
default:
dojo.debug("White point "+this.whitePoint+" isn't defined for Std. Observer "+this.strObserver);
}
break;
default:
dojo.debug("Std. Observer "+this.strObserver+" isn't defined");
}
var z=1-x-y;
var wp={"x":x,"y":y,"z":z,"t":t};
wp.Y=1;
var XYZ=this.xyY_to_XYZ([wp.x,wp.y,wp.Y]);
wp.X=XYZ[0];
wp.Y=XYZ[1];
wp.Z=XYZ[2];
return wp;
};
dojo.gfx.Colorspace.prototype.getPrimaries=function(){
var m=[];
switch(this.RGBWorkingSpace){
case "adobe_rgb_1998":
m=[2.2,"D65",0.64,0.33,0.297361,0.21,0.71,0.627355,0.15,0.06,0.075285];
break;
case "apple_rgb":
m=[1.8,"D65",0.625,0.34,0.244634,0.28,0.595,0.672034,0.155,0.07,0.083332];
break;
case "best_rgb":
m=[2.2,"D50",0.7347,0.2653,0.228457,0.215,0.775,0.737352,0.13,0.035,0.034191];
break;
case "beta_rgb":
m=[2.2,"D50",0.6888,0.3112,0.303273,0.1986,0.7551,0.663786,0.1265,0.0352,0.032941];
break;
case "bruce_rgb":
m=[2.2,"D65",0.64,0.33,0.240995,0.28,0.65,0.683554,0.15,0.06,0.075452];
break;
case "cie_rgb":
m=[2.2,"E",0.735,0.265,0.176204,0.274,0.717,0.812985,0.167,0.009,0.010811];
break;
case "color_match_rgb":
m=[1.8,"D50",0.63,0.34,0.274884,0.295,0.605,0.658132,0.15,0.075,0.066985];
break;
case "don_rgb_4":
m=[2.2,"D50",0.696,0.3,0.27835,0.215,0.765,0.68797,0.13,0.035,0.03368];
break;
case "eci_rgb":
m=[1.8,"D50",0.67,0.33,0.32025,0.21,0.71,0.602071,0.14,0.08,0.077679];
break;
case "ekta_space_ps5":
m=[2.2,"D50",0.695,0.305,0.260629,0.26,0.7,0.734946,0.11,0.005,0.004425];
break;
case "ntsc_rgb":
m=[2.2,"C",0.67,0.33,0.298839,0.21,0.71,0.586811,0.14,0.08,0.11435];
break;
case "pal_secam_rgb":
m=[2.2,"D65",0.64,0.33,0.222021,0.29,0.6,0.706645,0.15,0.06,0.071334];
break;
case "pro_photo_rgb":
m=[1.8,"D50",0.7347,0.2653,0.28804,0.1596,0.8404,0.711874,0.0366,0.0001,0.000086];
break;
case "smpte-c_rgb":
m=[2.2,"D65",0.63,0.34,0.212395,0.31,0.595,0.701049,0.155,0.07,0.086556];
break;
case "s_rgb":
m=[2.2,"D65",0.64,0.33,0.212656,0.3,0.6,0.715158,0.15,0.06,0.072186];
break;
case "wide_gamut_rgb":
m=[2.2,"D50",0.735,0.265,0.258187,0.115,0.826,0.724938,0.157,0.018,0.016875];
break;
default:
dojo.debug("RGB working space "+this.RGBWorkingSpace+" isn't defined");
}
var p={name:this.RGBWorkingSpace,gamma:m[0],wp:m[1],xr:m[2],yr:m[3],Yr:m[4],xg:m[5],yg:m[6],Yg:m[7],xb:m[8],yb:m[9],Yb:m[10]};
if(p.wp!=this.whitePoint){
var r=this.XYZ_to_xyY(this.chromaticAdaptation(this.xyY_to_XYZ([p.xr,p.yr,p.Yr]),p.wp,this.whitePoint));
var g=this.XYZ_to_xyY(this.chromaticAdaptation(this.xyY_to_XYZ([p.xg,p.yg,p.Yg]),p.wp,this.whitePoint));
var b=this.XYZ_to_xyY(this.chromaticAdaptation(this.xyY_to_XYZ([p.xb,p.yb,p.Yb]),p.wp,this.whitePoint));
p.xr=r[0];
p.yr=r[1];
p.Yr=r[2];
p.xg=g[0];
p.yg=g[1];
p.Yg=g[2];
p.xb=b[0];
p.yb=b[1];
p.Yb=b[2];
p.wp=this.whitePoint;
}
p.zr=1-p.xr-p.yr;
p.zg=1-p.xg-p.yg;
p.zb=1-p.xb-p.yb;
return p;
};
dojo.gfx.Colorspace.prototype.epsilon=function(){
return this.useApproxCIELabMapping?0.008856:216/24289;
};
dojo.gfx.Colorspace.prototype.kappa=function(){
return this.useApproxCIELabMapping?903.3:24389/27;
};
dojo.gfx.Colorspace.prototype.XYZ_to_xyY=function(){
var src=this.munge("XYZ",arguments);
var sum=src.X+src.Y+src.Z;
if(sum==0){
var wp=this.getWhitePoint();
var x=wp.x;
var y=wp.y;
}else{
var x=src.X/sum;
var y=src.Y/sum;
}
var Y=src.Y;
return [x,y,Y];
};
dojo.gfx.Colorspace.prototype.xyY_to_XYZ=function(){
var src=this.munge("xyY",arguments);
if(src.y==0){
var X=0;
var Y=0;
var Z=0;
}else{
var X=(src.x*src.Y)/src.y;
var Y=src.Y;
var Z=((1-src.x-src.y)*src.Y)/src.y;
}
return [X,Y,Z];
};
dojo.gfx.Colorspace.prototype.RGB_to_XYZ=function(){
var src=this.munge("RGB",arguments);
var m=this.getRGB_XYZ_Matrix();
var pr=this.getPrimaries();
if(this.RGBWorkingSpace=="s_rgb"){
var r=(src.R>0.04045)?Math.pow(((src.R+0.055)/1.055),2.4):src.R/12.92;
var g=(src.G>0.04045)?Math.pow(((src.G+0.055)/1.055),2.4):src.G/12.92;
var b=(src.B>0.04045)?Math.pow(((src.B+0.055)/1.055),2.4):src.B/12.92;
}else{
var r=Math.pow(src.R,pr.gamma);
var g=Math.pow(src.G,pr.gamma);
var b=Math.pow(src.B,pr.gamma);
}
var XYZ=dojo.math.matrix.multiply([[r,g,b]],m);
return [XYZ[0][0],XYZ[0][1],XYZ[0][2]];
};
dojo.gfx.Colorspace.prototype.XYZ_to_RGB=function(){
var src=this.munge("XYZ",arguments);
var mi=this.getXYZ_RGB_Matrix();
var pr=this.getPrimaries();
var rgb=dojo.math.matrix.multiply([[src.X,src.Y,src.Z]],mi);
var r=rgb[0][0];
var g=rgb[0][1];
var b=rgb[0][2];
if(this.RGBWorkingSpace=="s_rgb"){
var R=(r>0.0031308)?(1.055*Math.pow(r,1/2.4))-0.055:12.92*r;
var G=(g>0.0031308)?(1.055*Math.pow(g,1/2.4))-0.055:12.92*g;
var B=(b>0.0031308)?(1.055*Math.pow(b,1/2.4))-0.055:12.92*b;
}else{
var R=Math.pow(r,1/pr.gamma);
var G=Math.pow(g,1/pr.gamma);
var B=Math.pow(b,1/pr.gamma);
}
return [R,G,B];
};
dojo.gfx.Colorspace.prototype.XYZ_to_Lab=function(){
var src=this.munge("XYZ",arguments);
var wp=this.getWhitePoint();
var xr=src.X/wp.X;
var yr=src.Y/wp.Y;
var zr=src.Z/wp.Z;
var fx=(xr>this.epsilon())?Math.pow(xr,1/3):(this.kappa()*xr+16)/116;
var fy=(yr>this.epsilon())?Math.pow(yr,1/3):(this.kappa()*yr+16)/116;
var fz=(zr>this.epsilon())?Math.pow(zr,1/3):(this.kappa()*zr+16)/116;
var L=116*fy-16;
var a=500*(fx-fy);
var b=200*(fy-fz);
return [L,a,b];
};
dojo.gfx.Colorspace.prototype.Lab_to_XYZ=function(){
var src=this.munge("Lab",arguments);
var wp=this.getWhitePoint();
var yr=(src.L>(this.kappa()*this.epsilon()))?Math.pow((src.L+16)/116,3):src.L/this.kappa();
var fy=(yr>this.epsilon())?(src.L+16)/116:(this.kappa()*yr+16)/116;
var fx=(src.a/500)+fy;
var fz=fy-(src.b/200);
var _43=Math.pow(fx,3);
var _44=Math.pow(fz,3);
var xr=(_43>this.epsilon())?_43:(116*fx-16)/this.kappa();
var zr=(_44>this.epsilon())?_44:(116*fz-16)/this.kappa();
var X=xr*wp.X;
var Y=yr*wp.Y;
var Z=zr*wp.Z;
return [X,Y,Z];
};
dojo.gfx.Colorspace.prototype.Lab_to_LCHab=function(){
var src=this.munge("Lab",arguments);
var L=src.L;
var C=Math.pow(src.a*src.a+src.b*src.b,0.5);
var H=Math.atan2(src.b,src.a)*(180/Math.PI);
if(H<0){
H+=360;
}
if(H>360){
H-=360;
}
return [L,C,H];
};
dojo.gfx.Colorspace.prototype.LCHab_to_Lab=function(){
var src=this.munge("LCH",arguments);
var _4f=src.H*(Math.PI/180);
var L=src.L;
var a=src.C/Math.pow(Math.pow(Math.tan(_4f),2)+1,0.5);
if((90<src.H)&&(src.H<270)){
a=-a;
}
var b=Math.pow(Math.pow(src.C,2)-Math.pow(a,2),0.5);
if(src.H>180){
b=-b;
}
return [L,a,b];
};
dojo.gfx.Colorspace.prototype.chromaticAdaptation=function(col,_54,_55){
col=this.munge("XYZ",[col]);
var _56=this.whitePoint;
this.whitePoint=_54;
var _57=this.getWhitePoint();
this.whitePoint=_55;
var _58=this.getWhitePoint();
this.whitePoint=_56;
switch(this.chromaticAdaptationAlg){
case "xyz_scaling":
var ma=[[1,0,0],[0,1,0],[0,0,1]];
var mai=[[1,0,0],[0,1,0],[0,0,1]];
break;
case "bradford":
var ma=[[0.8951,-0.7502,0.0389],[0.2664,1.7135,-0.0685],[-0.1614,0.0367,1.0296]];
var mai=[[0.986993,0.432305,-0.008529],[-0.147054,0.51836,0.040043],[0.159963,0.049291,0.968487]];
break;
case "von_kries":
var ma=[[0.40024,-0.2263,0],[0.7076,1.16532,0],[-0.08081,0.0457,0.91822]];
var mai=[[1.859936,0.361191,0],[-1.129382,0.638812,0],[0.219897,-0.000006,1.089064]];
break;
default:
dojo.debug("The "+this.chromaticAdaptationAlg+" chromatic adaptation algorithm matricies are not defined");
}
var _5b=dojo.math.matrix.multiply([[_57.x,_57.y,_57.z]],ma);
var _5c=dojo.math.matrix.multiply([[_58.x,_58.y,_58.z]],ma);
var _5d=[[_5c[0][0]/_5b[0][0],0,0],[0,_5c[0][1]/_5b[0][1],0],[0,0,_5c[0][2]/_5b[0][2]]];
var m=dojo.math.matrix.multiply(dojo.math.matrix.multiply(ma,_5d),mai);
var dst=dojo.math.matrix.multiply([[col.X,col.Y,col.Z]],m);
return dst[0];
};
dojo.gfx.Colorspace.prototype.getRGB_XYZ_Matrix=function(){
var wp=this.getWhitePoint();
var pr=this.getPrimaries();
var Xr=pr.xr/pr.yr;
var Yr=1;
var Zr=(1-pr.xr-pr.yr)/pr.yr;
var Xg=pr.xg/pr.yg;
var Yg=1;
var Zg=(1-pr.xg-pr.yg)/pr.yg;
var Xb=pr.xb/pr.yb;
var Yb=1;
var Zb=(1-pr.xb-pr.yb)/pr.yb;
var m1=[[Xr,Yr,Zr],[Xg,Yg,Zg],[Xb,Yb,Zb]];
var m2=[[wp.X,wp.Y,wp.Z]];
var sm=dojo.math.matrix.multiply(m2,dojo.math.matrix.inverse(m1));
var Sr=sm[0][0];
var Sg=sm[0][1];
var Sb=sm[0][2];
var m4=[[Sr*Xr,Sr*Yr,Sr*Zr],[Sg*Xg,Sg*Yg,Sg*Zg],[Sb*Xb,Sb*Yb,Sb*Zb]];
return m4;
};
dojo.gfx.Colorspace.prototype.getXYZ_RGB_Matrix=function(){
var m=this.getRGB_XYZ_Matrix();
return dojo.math.matrix.inverse(m);
};
dojo.gfx.Colorspace.prototype.XYZ_to_Luv=function(){
var src=this.munge("XYZ",arguments);
var wp=this.getWhitePoint();
var ud=(4*src.X)/(src.X+15*src.Y+3*src.Z);
var vd=(9*src.Y)/(src.X+15*src.Y+3*src.Z);
var udr=(4*wp.X)/(wp.X+15*wp.Y+3*wp.Z);
var vdr=(9*wp.Y)/(wp.X+15*wp.Y+3*wp.Z);
var yr=src.Y/wp.Y;
var L=(yr>this.epsilon())?116*Math.pow(yr,1/3)-16:this.kappa()*yr;
var u=13*L*(ud-udr);
var v=13*L*(vd-vdr);
return [L,u,v];
};
dojo.gfx.Colorspace.prototype.Luv_to_XYZ=function(){
var src=this.munge("Luv",arguments);
var wp=this.getWhitePoint();
var uz=(4*wp.X)/(wp.X+15*wp.Y+3*wp.Z);
var vz=(9*wp.Y)/(wp.X+15*wp.Y+3*wp.Z);
var Y=(src.L>this.kappa()*this.epsilon())?Math.pow((src.L+16)/116,3):src.L/this.kappa();
var a=(1/3)*(((52*src.L)/(src.u+13*src.L*uz))-1);
var b=-5*Y;
var c=-(1/3);
var d=Y*(((39*src.L)/(src.v+13*src.L*vz))-5);
var X=(d-b)/(a-c);
var Z=X*a+b;
return [X,Y,Z];
};
dojo.gfx.Colorspace.prototype.Luv_to_LCHuv=function(){
var src=this.munge("Luv",arguments);
var L=src.L;
var C=Math.pow(src.u*src.u+src.v*src.v,0.5);
var H=Math.atan2(src.v,src.u)*(180/Math.PI);
if(H<0){
H+=360;
}
if(H>360){
H-=360;
}
return [L,C,H];
};
dojo.gfx.Colorspace.prototype.LCHuv_to_Luv=function(){
var src=this.munge("LCH",arguments);
var _8d=src.H*(Math.PI/180);
var L=src.L;
var u=src.C/Math.pow(Math.pow(Math.tan(_8d),2)+1,0.5);
var v=Math.pow(src.C*src.C-u*u,0.5);
if((90<src.H)&&(src.H<270)){
u*=-1;
}
if(src.H>180){
v*=-1;
}
return [L,u,v];
};
dojo.gfx.Colorspace.colorTemp_to_whitePoint=function(T){
if(T<4000){
dojo.debug("Can't find a white point for temperatures under 4000K");
return [0,0];
}
if(T>25000){
dojo.debug("Can't find a white point for temperatures over 25000K");
return [0,0];
}
var T1=T;
var T2=T*T;
var T3=T2*T;
var _95=Math.pow(10,9);
var _96=Math.pow(10,6);
var _97=Math.pow(10,3);
if(T<=7000){
var x=(-4.607*_95/T3)+(2.9678*_96/T2)+(0.09911*_97/T)+0.244063;
}else{
var x=(-2.0064*_95/T3)+(1.9018*_96/T2)+(0.24748*_97/T)+0.23704;
}
var y=-3*x*x+2.87*x-0.275;
return [x,y];
};
dojo.gfx.Colorspace.prototype.RGB_to_CMY=function(){
var src=this.munge("RGB",arguments);
var C=1-src.R;
var M=1-src.G;
var Y=1-src.B;
return [C,M,Y];
};
dojo.gfx.Colorspace.prototype.CMY_to_RGB=function(){
var src=this.munge("CMY",arguments);
var R=1-src.C;
var G=1-src.M;
var B=1-src.Y;
return [R,G,B];
};
dojo.gfx.Colorspace.prototype.RGB_to_CMYK=function(){
var src=this.munge("RGB",arguments);
var K=Math.min(1-src.R,1-src.G,1-src.B);
var C=(1-src.R-K)/(1-K);
var M=(1-src.G-K)/(1-K);
var Y=(1-src.B-K)/(1-K);
return [C,M,Y,K];
};
dojo.gfx.Colorspace.prototype.CMYK_to_RGB=function(){
var src=this.munge("CMYK",arguments);
var R=1-Math.min(1,src.C*(1-src.K)+src.K);
var G=1-Math.min(1,src.M*(1-src.K)+src.K);
var B=1-Math.min(1,src.Y*(1-src.K)+src.K);
return [R,G,B];
};
dojo.gfx.Colorspace.prototype.CMY_to_CMYK=function(){
var src=this.munge("CMY",arguments);
var K=Math.min(src.C,src.M,src.Y);
var C=(src.C-K)/(1-K);
var M=(src.M-K)/(1-K);
var Y=(src.Y-K)/(1-K);
return [C,M,Y,K];
};
dojo.gfx.Colorspace.prototype.CMYK_to_CMY=function(){
var src=this.munge("CMYK",arguments);
var C=Math.min(1,src.C*(1-src.K)+src.K);
var M=Math.min(1,src.M*(1-src.K)+src.K);
var Y=Math.min(1,src.Y*(1-src.K)+src.K);
return [C,M,Y];
};
dojo.gfx.Colorspace.prototype.RGB_to_HSV=function(){
var src=this.munge("RGB",arguments);
var min=Math.min(src.R,src.G,src.B);
var V=Math.max(src.R,src.G,src.B);
var _b7=V-min;
var H=null;
var S=(V==0)?0:_b7/V;
if(S==0){
H=0;
}else{
if(src.R==V){
H=60*(src.G-src.B)/_b7;
}else{
if(src.G==V){
H=120+60*(src.B-src.R)/_b7;
}else{
if(src.B==V){
H=240+60*(src.R-src.G)/_b7;
}
}
}
if(H<0){
H+=360;
}
}
H=(H==0)?360:H;
return [H,S,V];
};
dojo.gfx.Colorspace.prototype.HSV_to_RGB=function(){
var src=this.munge("HSV",arguments);
if(src.H==360){
src.H=0;
}
var r=null;
var g=null;
var b=null;
if(src.S==0){
var R=src.V;
var G=src.V;
var B=src.V;
}else{
var _c1=src.H/60;
var i=Math.floor(_c1);
var f=_c1-i;
var p=src.V*(1-src.S);
var q=src.V*(1-(src.S*f));
var t=src.V*(1-(src.S*(1-f)));
switch(i){
case 0:
R=src.V;
G=t;
B=p;
break;
case 1:
R=q;
G=src.V;
B=p;
break;
case 2:
R=p;
G=src.V;
B=t;
break;
case 3:
R=p;
G=q;
B=src.V;
break;
case 4:
R=t;
G=p;
B=src.V;
break;
case 5:
R=src.V;
G=p;
B=q;
break;
}
}
return [R,G,B];
};
dojo.gfx.Colorspace.prototype.RGB_to_HSL=function(){
var src=this.munge("RGB",arguments);
var min=Math.min(src.R,src.G,src.B);
var max=Math.max(src.R,src.G,src.B);
var _ca=max-min;
var H=0;
var S=0;
var L=(min+max)/2;
if((L>0)&&(L<1)){
S=_ca/((L<0.5)?(2*L):(2-2*L));
}
if(_ca>0){
if((max==src.R)&&(max!=src.G)){
H+=(src.G-src.B)/_ca;
}
if((max==src.G)&&(max!=src.B)){
H+=(2+(src.B-src.R)/_ca);
}
if((max==src.B)&&(max!=src.R)){
H+=(4+(src.R-src.G)/_ca);
}
H*=60;
}
H=(H==0)?360:H;
return [H,S,L];
};
dojo.gfx.Colorspace.prototype.HSL_to_RGB=function(){
var src=this.munge("HSL",arguments);
while(src.H<0){
src.H+=360;
}
while(src.H>=360){
src.H-=360;
}
var R=0;
var G=0;
var B=0;
if(src.H<120){
R=(120-src.H)/60;
G=src.H/60;
B=0;
}else{
if(src.H<240){
R=0;
G=(240-src.H)/60;
B=(src.H-120)/60;
}else{
R=(src.H-240)/60;
G=0;
B=(360-src.H)/60;
}
}
R=2*src.S*Math.min(R,1)+(1-src.S);
G=2*src.S*Math.min(G,1)+(1-src.S);
B=2*src.S*Math.min(B,1)+(1-src.S);
if(src.L<0.5){
R=src.L*R;
G=src.L*G;
B=src.L*B;
}else{
R=(1-src.L)*R+2*src.L-1;
G=(1-src.L)*G+2*src.L-1;
B=(1-src.L)*B+2*src.L-1;
}
return [R,G,B];
};