color.min.php

<?php class Color{public $c;private function isColor(){return is_array($this->c)&&count($this->c)==3;}private function rgb2hue($r,$g,$b,$delta){if($delta==0)return 0;else switch(max($r,$g,$b)){case $r:return 60*fmod(($g-$b)/$delta,6)+($b>$g?360:0);case $g:return 60*(($b-$r)/$delta+2);case $b:return 60*(($r-$g)/$delta+4);}}private function hue2rgb($h,$c,$m){$x=$c*(1-abs(fmod($h/60,2)-1));if($h<60)$rgb=[$c,$x,0];else if($h<120)$rgb=[$x,$c,0];else if($h<180)$rgb=[0,$c,$x];else if($h<240)$rgb=[0,$x,$c];else if($h<300)$rgb=[$x,0,$c];else $rgb=[$c,0,$x];return array_map(function($val)use($m){return($val+$m)*255;},$rgb);}private function interpolateColor($x,$y,$i,$n){return($x<$y)?(($y-$x)*($i/$n))+$x:(($x-$y)*(1-($i/$n)))+$y;}public function setRGB(int $r=0,int $g=0,int $b=0){$this->c=array_map(function($val){return max(min($val,255),0);},[$r,$g,$b]);return $this;}public function setRYB(int $r=0,int $y=0,int $b=0){$w=min($r,$y,$b);list($r,$y,$b)=array_map(function($val)use($w){return $val-$w;},[$r,$y,$b]);$my=max($r,$y,$b);$g=min($y,$b);$y-=$g;$b-=$g;if($b&&$g){$b*=2.0;$g*=2.0;}$r+=$y;$g+=$y;$mg=max($r,$g,$b);$n=$my/$mg;list($r,$g,$b)=array_map(function($val)use($w,$mg,$n){return($mg?$n:1)*$val+$w;},[$r,$g,$b]);$this->c=[$r,$g,$b];return $this;}public function setHEX(string $color){$color=str_replace('#','',$color);$spl=strlen($color)/3;$rep=3-$spl;$this->c=array_map(function($val)use($rep){return hexdec(str_repeat($val,$rep));},str_split($color,$spl));return $this;}function setHSL(float $h=0,float $s=0,float $l=0){$c=(1-abs(2*$l-1))*$s;$m=$l-($c/2);$this->c=$this->hue2rgb($h,$c,$m);return $this;}function setHSV(float $h=0,float $s=0,float $v=0){$c=$v*$s;$m=$v-$c;$this->c=$this->hue2rgb($h,$c,$m);return $this;}public function setCMYK(float $c=0,float $m=0,float $y=0,float $k=0){$this->c=array_map(function($val)use($k){return 255*(1-$val)*(1-$k);},[$c,$m,$y]);return $this;}public function setYUV(float $y=0,float $u=0,float $v=0){$this->c=[$y+(1/0.877*$v),$y-(0.114/0.289391*$u)-(0.299/0.514799*$v),$y+(1/0.493*$u)];return $this;}public function toRGB(bool $assoc=true){return $this->isColor()?array_combine($assoc?['r','g','b']:[0,1,2],array_map('round',$this->c)):null;}public function toRYB(){if(!$this->isColor())return null;$w=min($this->c);list($r,$g,$b)=array_map(function($val)use($w){return $val-$w;},$this->c);$mg=max($r,$g,$b);$y=min($r,$g);$r-=$y;$g-=$y;if($b&&$g){$b/=2.0;$g/=2.0;}$y+=$g;$b+=$g;$my=max($r,$y,$b);$n=$mg/$my;list($r,$y,$b)=array_map(function($val)use($w,$my,$n){return($my?$n:1)*$val+$w;},[$r,$y,$b]);return['r'=>$r,'y'=>$y,'b'=>$b];}public function toCMYK(){if(!$this->isColor())return null;$k=1-max($this->c)/255;list($c,$m,$y)=array_map(function($val)use($k){return(1-$k-$val/255)/(1-$k);},$this->c);return['c'=>$c,'m'=>$m,'y'=>$y,'k'=>$k];}public function toHEX(bool $hash=true){return $this->isColor()?($hash?'#':'').implode('',array_map(function($val){return str_pad(dechex(round($val)),2,'0',STR_PAD_LEFT);},$this->c)):null;}public function toHSL(){if(!$this->isColor())return null;list($r,$g,$b)=array_map(function($val){return $val/255;},$this->c);$max=max($r,$g,$b);$min=min($r,$g,$b);$delta=$max-$min;$lightness=($max+$min)/2;return['h'=>$this->rgb2hue($r,$g,$b,$delta),'s'=>$delta==0?0:$delta/(1-abs(2*$lightness-1)),'l'=>$lightness];}public function toHSV(){if(!$this->isColor())return null;list($r,$g,$b)=array_map(function($val){return $val/255;},$this->c);$max=max($r,$g,$b);$min=min($r,$g,$b);$delta=$max-$min;return['h'=>$this->rgb2hue($r,$g,$b,$delta),'s'=>$max==0?0:$delta/$max,'v'=>$max];}public function toXYZ(){if(!$this->isColor())return null;list($r,$g,$b)=array_map(function($val){return(($val/=255)<=0.04045?$val/12.92:pow(($val+0.055)/1.055,2.4))*100;},$this->c);return['x'=>$r*0.412453+$g*0.357580+$b*0.180423,'y'=>$r*0.212671+$g*0.715160+$b*0.072169,'z'=>$r*0.019334+$g*0.119193+$b*0.950227];}public function toYxy(){if(!$this->isColor())return null;list($x,$y,$z)=array_values($this->toXYZ());$cero=max($x,$y,$z)==0;return['Y'=>$y,'x'=>$cero?0:$x/($x+$y+$z),'y'=>$cero?0:$y/($x+$y+$z)];}public function toLAB(){if(!$this->isColor())return null;$xyz=$this->toXYZ();$x=$xyz['x']/95.047;$y=$xyz['y']/100;$z=$xyz['z']/108.883;list($x,$y,$z)=array_map(function($val){return $val>0.008856?pow($val,1/3):$val*7.787+16/116;},[$x,$y,$z]);return['l'=>$y*116-16,'a'=>($x-$y)*500,'b'=>($y-$z)*200];}public function toLCH(){if(!$this->isColor())return null;list($l,$a,$b)=$this->toLAB();return['l'=>$l,'c'=>sqrt(pow($a,2)+pow($b,2)),'h'=>atan($b/$a)];}public function toYUV(){if(!$this->isColor())return null;list($r,$g,$b)=$this->c;$y=0.299*$r+0.587*$g+0.114*$b;return['y'=>$y,'u'=>0.493*($b-$y),'v'=>0.877*($r-$y)];}public function toYIQ(){if(!$this->isColor())return null;list($r,$g,$b)=$this->c;return['y'=>0.299900*$r+0.587000*$g+0.114000*$b,'i'=>0.595716*$r-0.274453*$g-0.321264*$b,'q'=>0.211456*$r-0.522591*$g+0.311350*$b];}public function toYCbCr(){if(!$this->isColor())return null;list($r,$g,$b)=$this->c;return['y'=>16+(65.738*$r/256)+(129.057*$g/256)+(25.064*$b/256),'Cb'=>128-(37.945*$r/256)-(74.494*$g/256)+(112.439*$b/256),'Cr'=>128+(112.439*$r/256)-(94.154*$g/256)-(18.285*$b/256)];}public function toYPbPr(){if(!$this->isColor())return null;list($r,$g,$b)=$this->gamma();$y=0.299*$r+0.587*$g+0.114*$b;return['y'=>$y,'Pb'=>($b-$y)/1.772,'Pr'=>($r-$y)/1.402];}public function gamma(){return $this->isColor()?array_map(function($val){return 255*pow($val/256,0.45);},$this->c):null;}public function deltaE(Color $compare,bool $percentage=false){if(!$this->isColor()||!$compare->isColor())return null;list($l1,$a1,$b1)=array_values($this->toLAB());list($l2,$a2,$b2)=array_values($compare->toLAB());$dE=sqrt(pow($l1-$l2,2)+pow($a1-$a2,2)+pow($b1-$b2,2));return $percentage?1-$dE/sqrt(42768):$dE;}public function diff(Color $compare,string $space='RGB'){if(!$this->isColor()||!$compare->isColor())return null;if(in_array(strtoupper($space),['RGB','RYB']))$fnc='to'.strtoupper($space);list($x1,$y1,$z1)=array_values($this->$fnc());list($x2,$y2,$z2)=array_values($compare->$fnc());return sqrt(pow($x2-$x1,2)+pow($y2-$y1,2)+pow($z2-$z1,2));}public function match(Color $compare,string $space='RGB'){if(!$this->isColor()||!$compare->isColor())return null;return 1-$this->diff($compare,$space)/sqrt(195075);}public function complementary(){if(!$this->isColor())return null;return(new Color())->setRGB(255-$this->c[0],255-$this->c[1],255-$this->c[2]);}public function invert(){return $this->complementary();}public function rotate(float $degrees=0){if(!$this->isColor())return null;list($h,$s,$l)=array_values($this->toHSL());return(new Color())->setHSL(($h+360+($degrees%360))%360,$s,$l);}public function shift(float $degrees=0){return $this->rotate($degrees);}public function lighten(float $value=0){if(!$this->isColor())return null;list($h,$s,$l)=array_values($this->toHSL());return(new Color())->setHSL($h,$s,max(min($l+$value,1),0));}public function darken(float $value=0){return $this->lighten($value*(-1));}public function saturation(float $value=0){if(!$this->isColor())return null;list($h,$s,$l)=array_values($this->toHSL());return(new Color())->setHSL($h,max(min($s+$value,1),0),$l);}public function grayscale(bool $correction=false){if(!$this->isColor())return null;list($r,$g,$b)=array_map(function($val){return $val/255;},$this->c);return $correction?(($c=0.2126*$r+0.7152*$g+0.0722*$b)>0.0031308?1.055*pow($c,1/2.4)-0.055:12.92*$c):0.299*$r+0.587*$g+0.114*$b;}public function toGrayscale(bool $correction=false){return($g=$this->grayscale($correction))!=null?(new Color())->setRGB($g*255,$g*255,$g*255):null;}public function triplet(){return $this->triadic();}public function triadic(){return $this->isColor()?[$this,(new Color())->setRGB($this->c[1],$this->c[2],$this->c[0]),(new Color())->setRGB($this->c[2],$this->c[0],$this->c[1])]:null;}public function contrast(){return $this->isColor()?(($this->c[0]*299+$this->c[1]*587+$this->c[2]*114)/1000>=128?0:1):null;}public function gradient(Color $stop,int $steps=1,bool $boundary=true){if(!$this->isColor()||!$stop->isColor())return null;$n=max(min($steps+1,255),0);list($r1,$g1,$b1)=$this->c;list($r2,$g2,$b2)=$stop->color;$gradient=[];for($i=0;$i<=$n;$i++){$gradient[]=(new Color())->setRGB($this->interpolateColor($r1,$r2,$i,$n),$this->interpolateColor($g1,$g2,$i,$n),$this->interpolateColor($b1,$b2,$i,$n));}return $boundary?$gradient:array_slice($gradient,1,-1);}public function palette(string $type='tints',int $steps=1){if(!$this->isColor()||!in_array($type,['tints','shades']))return null;return $this->gradient((new Color())->setHEX(['tints'=>'#ffffff','shades'=>'#000000'][$type]),$steps);}public function nearest(int $count=1){if(!$this->isColor()||$count<1)return null;list($r,$g,$b)=array_values($this->toRGB());list($h,$s,$l)=array_values($this->toHSL());$results=[];foreach(json_decode(file_get_contents(__DIR__.'/colors.json'),true)as $idx=>$color){$diff=2*(sqrt(pow($r-$color['rgb'][0],2)+pow($g-$color['rgb'][1],2)+pow($b-$color['rgb'][2],2))+sqrt(pow($h-$color['hsl'][0],2)+pow($s-$color['hsl'][1],2)+pow($l-$color['hsl'][2],2)));$results[]=['name'=>$color['key'],'color'=>(new Color())->setHEX($color['hex']),'exact'=>$diff==0,'diff'=>$diff];}array_multisort(array_map(function($val){return $val['diff'];},$results),SORT_ASC,$results);return array_slice($results,0,$count);}public function closest(int $count=1){return $this->nearest($count);}} ?>