git.pond.sub.org Git - eow/blob - static/dojo-release-1.1.1/dojox/color/_base.js

   1 if(!dojo._hasResource["dojox.color._base"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
   2 dojo._hasResource["dojox.color._base"] = true;
   3 dojo.provide("dojox.color._base");
   4 dojo.require("dojo.colors");
   5
   6 //      alias all the dojo.Color mechanisms
   7 dojox.color.Color=dojo.Color;
   8 dojox.color.blend=dojo.blendColors;
   9 dojox.color.fromRgb=dojo.colorFromRgb;
  10 dojox.color.fromHex=dojo.colorFromHex;
  11 dojox.color.fromArray=dojo.colorFromArray;
  12 dojox.color.fromString=dojo.colorFromString;
  13
  14 //      alias the dojo.colors mechanisms
  15 dojox.color.greyscale=dojo.colors.makeGrey;
  16
  17 //      static methods
  18 dojo.mixin(dojox.color, {
  19         fromCmy: function(/* Object|Array|int */cyan, /*int*/magenta, /*int*/yellow){
  20                 //      summary
  21                 //      Create a dojox.color.Color from a CMY defined color.
  22                 //      All colors should be expressed as 0-100 (percentage)
  23
  24                 if(dojo.isArray(cyan)){
  25                         magenta=cyan[1], yellow=cyan[2], cyan=cyan[0];
  26                 } else if(dojo.isObject(cyan)){
  27                         magenta=cyan.m, yellow=cyan.y, cyan=cyan.c;
  28                 }
  29                 cyan/=100, magenta/=100, yellow/=100;
  30
  31                 var r=1-cyan, g=1-magenta, b=1-yellow;
  32                 return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) });        //      dojox.color.Color
  33         },
  34
  35         fromCmyk: function(/* Object|Array|int */cyan, /*int*/magenta, /*int*/yellow, /*int*/black){
  36                 //      summary
  37                 //      Create a dojox.color.Color from a CMYK defined color.
  38                 //      All colors should be expressed as 0-100 (percentage)
  39
  40                 if(dojo.isArray(cyan)){
  41                         magenta=cyan[1], yellow=cyan[2], black=cyan[3], cyan=cyan[0];
  42                 } else if(dojo.isObject(cyan)){
  43                         magenta=cyan.m, yellow=cyan.y, black=cyan.b, cyan=cyan.c;
  44                 }
  45                 cyan/=100, magenta/=100, yellow/=100, black/=100;
  46                 var r,g,b;
  47                 r = 1-Math.min(1, cyan*(1-black)+black);
  48                 g = 1-Math.min(1, magenta*(1-black)+black);
  49                 b = 1-Math.min(1, yellow*(1-black)+black);
  50                 return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) });        //      dojox.color.Color
  51         },
  52
  53         fromHsl: function(/* Object|Array|int */hue, /* int */saturation, /* int */luminosity){
  54                 //      summary
  55                 //      Create a dojox.color.Color from an HSL defined color.
  56                 //      hue from 0-359 (degrees), saturation and luminosity 0-100.
  57
  58                 if(dojo.isArray(hue)){
  59                         saturation=hue[1], luminosity=hue[2], hue=hue[0];
  60                 } else if(dojo.isObject(hue)){
  61                         saturation=hue.s, luminosity=hue.l, hue=hue.h;
  62                 }
  63                 saturation/=100;
  64                 luminosity/=100;
  65
  66                 while(hue<0){ hue+=360; }
  67                 while(hue>=360){ hue-=360; }
  68
  69                 var r, g, b;
  70                 if(hue<120){
  71                         r=(120-hue)/60, g=hue/60, b=0;
  72                 } else if (hue<240){
  73                         r=0, g=(240-hue)/60, b=(hue-120)/60;
  74                 } else {
  75                         r=(hue-240)/60, g=0, b=(360-hue)/60;
  76                 }
  77
  78                 r=2*saturation*Math.min(r, 1)+(1-saturation);
  79                 g=2*saturation*Math.min(g, 1)+(1-saturation);
  80                 b=2*saturation*Math.min(b, 1)+(1-saturation);
  81                 if(luminosity<0.5){
  82                         r*=luminosity, g*=luminosity, b*=luminosity;
  83                 }else{
  84                         r=(1-luminosity)*r+2*luminosity-1;
  85                         g=(1-luminosity)*g+2*luminosity-1;
  86                         b=(1-luminosity)*b+2*luminosity-1;
  87                 }
  88                 return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) });        //      dojox.color.Color
  89         },
  90
  91         fromHsv: function(/* Object|Array|int */hue, /* int */saturation, /* int */value){
  92                 //      summary
  93                 //      Create a dojox.color.Color from an HSV defined color.
  94                 //      hue from 0-359 (degrees), saturation and value 0-100.
  95
  96                 if(dojo.isArray(hue)){
  97                         saturation=hue[1], value=hue[2], hue=hue[0];
  98                 } else if (dojo.isObject(hue)){
  99                         saturation=hue.s, value=hue.v, hue=hue.h;
 100                 }
 101
 102                 if(hue==360){ hue=0; }
 103                 saturation/=100;
 104                 value/=100;
 105
 106                 var r, g, b;
 107                 if(saturation==0){
 108                         r=value, b=value, g=value;
 109                 }else{
 110                         var hTemp=hue/60, i=Math.floor(hTemp), f=hTemp-i;
 111                         var p=value*(1-saturation);
 112                         var q=value*(1-(saturation*f));
 113                         var t=value*(1-(saturation*(1-f)));
 114                         switch(i){
 115                                 case 0:{ r=value, g=t, b=p; break; }
 116                                 case 1:{ r=q, g=value, b=p; break; }
 117                                 case 2:{ r=p, g=value, b=t; break; }
 118                                 case 3:{ r=p, g=q, b=value; break; }
 119                                 case 4:{ r=t, g=p, b=value; break; }
 120                                 case 5:{ r=value, g=p, b=q; break; }
 121                         }
 122                 }
 123                 return new dojox.color.Color({ r:Math.round(r*255), g:Math.round(g*255), b:Math.round(b*255) });        //      dojox.color.Color
 124         }
 125 });
 126
 127 //      Conversions directly on dojox.color.Color
 128 dojo.extend(dojox.color.Color, {
 129         toCmy: function(){
 130                 //      summary
 131                 //      Convert this Color to a CMY definition.
 132                 var cyan=1-(this.r/255), magenta=1-(this.g/255), yellow=1-(this.b/255);
 133                 return { c:Math.round(cyan*100), m:Math.round(magenta*100), y:Math.round(yellow*100) };         //      Object
 134         },
 135
 136         toCmyk: function(){
 137                 //      summary
 138                 //      Convert this Color to a CMYK definition.
 139                 var cyan, magenta, yellow, black;
 140                 var r=this.r/255, g=this.g/255, b=this.b/255;
 141                 black = Math.min(1-r, 1-g, 1-b);
 142                 cyan = (1-r-black)/(1-black);
 143                 magenta = (1-g-black)/(1-black);
 144                 yellow = (1-b-black)/(1-black);
 145                 return { c:Math.round(cyan*100), m:Math.round(magenta*100), y:Math.round(yellow*100), b:Math.round(black*100) };        //      Object
 146         },
 147
 148         toHsl: function(){
 149                 //      summary
 150                 //      Convert this Color to an HSL definition.
 151                 var r=this.r/255, g=this.g/255, b=this.b/255;
 152                 var min = Math.min(r, b, g), max = Math.max(r, g, b);
 153                 var delta = max-min;
 154                 var h=0, s=0, l=(min+max)/2;
 155                 if(l>0 && l<1){
 156                         s = delta/((l<0.5)?(2*l):(2-2*l));
 157                 }
 158                 if(delta>0){
 159                         if(max==r && max!=g){
 160                                 h+=(g-b)/delta;
 161                         }
 162                         if(max==g && max!=b){
 163                                 h+=(2+(b-r)/delta);
 164                         }
 165                         if(max==b && max!=r){
 166                                 h+=(4+(r-g)/delta);
 167                         }
 168                         h*=60;
 169                 }
 170                 return { h:h, s:Math.round(s*100), l:Math.round(l*100) };       //      Object
 171         },
 172
 173         toHsv: function(){
 174                 //      summary
 175                 //      Convert this Color to an HSV definition.
 176                 var r=this.r/255, g=this.g/255, b=this.b/255;
 177                 var min = Math.min(r, b, g), max = Math.max(r, g, b);
 178                 var delta = max-min;
 179                 var h = null, s = (max==0)?0:(delta/max);
 180                 if(s==0){
 181                         h = 0;
 182                 }else{
 183                         if(r==max){
 184                                 h = 60*(g-b)/delta;
 185                         }else if(g==max){
 186                                 h = 120 + 60*(b-r)/delta;
 187                         }else{
 188                                 h = 240 + 60*(r-g)/delta;
 189                         }
 190
 191                         if(h<0){ h+=360; }
 192                 }
 193                 return { h:h, s:Math.round(s*100), v:Math.round(max*100) };     //      Object
 194         }
 195 });
 196
 197 }