source: [view]
dojo.provide("dojox.color._base");
dojo.require("dojo.colors");
// alias all the dojo.Color mechanisms
dojox.color.Color=dojo.Color;
dojox.color.blend=dojo.blendColors;
dojox.color.fromRgb=dojo.colorFromRgb;
dojox.color.fromHex=dojo.colorFromHex;
dojox.color.fromArray=dojo.colorFromArray;
dojox.color.fromString=dojo.colorFromString;
// alias the dojo.colors mechanisms
dojox.color.greyscale=dojo.colors.makeGrey;
// static methods
dojo.mixin(dojox.color, {
fromCmy: function(/* Object|Array|int */cyan, /*int*/magenta, /*int*/yellow){
// summary
// Create a dojox.color.Color from a CMY defined color.
// All colors should be expressed as 0-100 (percentage)
if(dojo.isArray(cyan)){
magenta=cyan[1], yellow=cyan[2], cyan=cyan[0];
} else if(dojo.isObject(cyan)){
magenta=cyan.m, yellow=cyan.y, cyan=cyan.c;
}
cyan/=100, magenta/=100, yellow/=100;
var r=1-cyan, g=1-magenta, b=1-yellow;
return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) }); // dojox.color.Color
},
fromCmyk: function(/* Object|Array|int */cyan, /*int*/magenta, /*int*/yellow, /*int*/black){
// summary
// Create a dojox.color.Color from a CMYK defined color.
// All colors should be expressed as 0-100 (percentage)
if(dojo.isArray(cyan)){
magenta=cyan[1], yellow=cyan[2], black=cyan[3], cyan=cyan[0];
} else if(dojo.isObject(cyan)){
magenta=cyan.m, yellow=cyan.y, black=cyan.b, cyan=cyan.c;
}
cyan/=100, magenta/=100, yellow/=100, black/=100;
var r,g,b;
r = 1-Math.min(1, cyan*(1-black)+black);
g = 1-Math.min(1, magenta*(1-black)+black);
b = 1-Math.min(1, yellow*(1-black)+black);
return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) }); // dojox.color.Color
},
fromHsl: function(/* Object|Array|int */hue, /* int */saturation, /* int */luminosity){
// summary
// Create a dojox.color.Color from an HSL defined color.
// hue from 0-359 (degrees), saturation and luminosity 0-100.
if(dojo.isArray(hue)){
saturation=hue[1], luminosity=hue[2], hue=hue[0];
} else if(dojo.isObject(hue)){
saturation=hue.s, luminosity=hue.l, hue=hue.h;
}
saturation/=100;
luminosity/=100;
while(hue<0){ hue+=360; }
while(hue>=360){ hue-=360; }
var r, g, b;
if(hue<120){
r=(120-hue)/60, g=hue/60, b=0;
} else if (hue<240){
r=0, g=(240-hue)/60, b=(hue-120)/60;
} else {
r=(hue-240)/60, g=0, b=(360-hue)/60;
}
r=2*saturation*Math.min(r, 1)+(1-saturation);
g=2*saturation*Math.min(g, 1)+(1-saturation);
b=2*saturation*Math.min(b, 1)+(1-saturation);
if(luminosity<0.5){
r*=luminosity, g*=luminosity, b*=luminosity;
}else{
r=(1-luminosity)*r+2*luminosity-1;
g=(1-luminosity)*g+2*luminosity-1;
b=(1-luminosity)*b+2*luminosity-1;
}
return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) }); // dojox.color.Color
},
fromHsv: function(/* Object|Array|int */hue, /* int */saturation, /* int */value){
// summary
// Create a dojox.color.Color from an HSV defined color.
// hue from 0-359 (degrees), saturation and value 0-100.
if(dojo.isArray(hue)){
saturation=hue[1], value=hue[2], hue=hue[0];
} else if (dojo.isObject(hue)){
saturation=hue.s, value=hue.v, hue=hue.h;
}
if(hue==360){ hue=0; }
saturation/=100;
value/=100;
var r, g, b;
if(saturation==0){
r=value, b=value, g=value;
}else{
var hTemp=hue/60, i=Math.floor(hTemp), f=hTemp-i;
var p=value*(1-saturation);
var q=value*(1-(saturation*f));
var t=value*(1-(saturation*(1-f)));
switch(i){
case 0:{ r=value, g=t, b=p; break; }
case 1:{ r=q, g=value, b=p; break; }
case 2:{ r=p, g=value, b=t; break; }
case 3:{ r=p, g=q, b=value; break; }
case 4:{ r=t, g=p, b=value; break; }
case 5:{ r=value, g=p, b=q; break; }
}
}
return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) }); // dojox.color.Color
}
});
// Conversions directly on dojox.color.Color
dojo.extend(dojox.color.Color, {
toCmy: function(){
// summary
// Convert this Color to a CMY definition.
var cyan=1-(this.r/255), magenta=1-(this.g/255), yellow=1-(this.b/255);
return { c:Math.round(cyan*100), m:Math.round(magenta*100), y:Math.round(yellow*100) }; // Object
},
toCmyk: function(){
// summary
// Convert this Color to a CMYK definition.
var cyan, magenta, yellow, black;
var r=this.r/255, g=this.g/255, b=this.b/255;
black = Math.min(1-r, 1-g, 1-b);
cyan = (1-r-black)/(1-black);
magenta = (1-g-black)/(1-black);
yellow = (1-b-black)/(1-black);
return { c:Math.round(cyan*100), m:Math.round(magenta*100), y:Math.round(yellow*100), b:Math.round(black*100) }; // Object
},
toHsl: function(){
// summary
// Convert this Color to an HSL definition.
var r=this.r/255, g=this.g/255, b=this.b/255;
var min = Math.min(r, b, g), max = Math.max(r, g, b);
var delta = max-min;
var h=0, s=0, l=(min+max)/2;
if(l>0 && l<1){
s = delta/((l<0.5)?(2*l):(2-2*l));
}
if(delta>0){
if(max==r && max!=g){
h+=(g-b)/delta;
}
if(max==g && max!=b){
h+=(2+(b-r)/delta);
}
if(max==b && max!=r){
h+=(4+(r-g)/delta);
}
h*=60;
}
return { h:h, s:Math.round(s*100), l:Math.round(l*100) }; // Object
},
toHsv: function(){
// summary
// Convert this Color to an HSV definition.
var r=this.r/255, g=this.g/255, b=this.b/255;
var min = Math.min(r, b, g), max = Math.max(r, g, b);
var delta = max-min;
var h = null, s = (max==0)?0:(delta/max);
if(s==0){
h = 0;
}else{
if(r==max){
h = 60*(g-b)/delta;
}else if(g==max){
h = 120 + 60*(b-r)/delta;
}else{
h = 240 + 60*(r-g)/delta;
}
if(h<0){ h+=360; }
}
return { h:h, s:Math.round(s*100), v:Math.round(max*100) }; // Object