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<?php
/**
* Get Most Common Colors
* http://www.FG.com
* =======================
*
* @package kingdom
* @author FG
*/
class wooColorsGetMostCommonColors
{
const VERSION = 0.1;
/**
* Baseconfigurationstorage
*
* @var array
*/
public $config = array();
protected $image = array();
// store the public kingdom class
private $kingdom;
public $error;
/**
* @param string $imageUrl
*/
public function __construct( $imageUrl )
{
$this->kingdom = kingdom();
// setup the config
$this->config['valid_image_extensions'] = array('jpg', 'gif', 'png', 'bmp', 'jpeg');
$this->config['return_colors_nr'] = 6;
$this->config['reduce_brightness'] = true;
$this->config['reduce_gradients'] = true;
$this->config['delta'] = 16;
$this->config['check_on'] = array(
'width' => 200,
'height' => 200
);
$this->config['exclude_colors'] = array('ffffff');
$this->config['named_color'] = array();
// set the new image source
$this->image['url'] = $imageUrl;
// try to convert the image URL to PATH
$this->getImagePath();
if( !$this->is_valid_image() ) {
throw new Exception('Invalid IMAGE');
}
// overwrite from DB
$this->updateDBSettings();
}
private function updateDBSettings ()
{
$config = $this->kingdom->getAllSettings('array', 'color_config');
if( trim($config['colors_name']) != ""){
$color_name_str = $config['colors_name'];
// trim by row
$_ = explode("\n", $color_name_str);
$colors = array();
if(count($_) > 0){
foreach ($_ as $key => $value){
$value = str_replace(" ", "", $value);
$__ = explode("=>", $value);
if(count($__) > 0){
$colors[trim($__[0])] = explode(",", trim($__[1]));
}
}
}
$this->config['named_color'] = array_merge( $this->config['named_color'], $colors );
}
if( trim($config["return_colors_nr"]) != ""){
$this->config['return_colors_nr'] = $config['return_colors_nr'] + 1;
}
if( in_array( (boolean) $config["reduce_brightness"], array(true, false))){
$this->config['reduce_brightness'] = (boolean) $config["reduce_brightness"];
}
if( in_array( (boolean) $config["reduce_gradients"], array(true, false))){
$this->config['reduce_gradients'] = (boolean) $config["reduce_gradients"];
}
if( trim($config["delta"]) != ""){
$this->config['delta'] = (int) $config['delta'];
}
if( trim($config["check_on"]) != ""){
$_ = explode("X", $config['check_on'] );
$this->config['check_on'] = array(
'width' => $_[0],
'height' => $_[1]
);
}
}
public function setup ( $custom_option=array() )
{
// overwrite default value with custom value
if(count($custom_option) > 0){
$this->config = array_merge( $this->config, $custom_option );
}
}
private function is_valid_image ()
{
// check if image exist as path
if( !is_file($this->image['path']) ) return false;
// check image extension
$ext = strtolower(end(explode('.', $this->image['url'])));
if( !in_array($ext, $this->config['valid_image_extensions']) ) return false;
return true;
}
private function getImagePath ()
{
$_file_url = explode('wp-content', $this->image['url']);
$this->image['path'] = ABSPATH . "wp-content" . end($_file_url);
}
public function getColors()
{
$img = $this->image['path'];
if (is_readable( $img ))
{
if ( $this->config['delta'] > 2 )
{
$half_delta = $this->config['delta'] / 2 - 1;
}
else
{
$half_delta = 0;
}
// WE HAVE TO RESIZE THE IMAGE, BECAUSE WE ONLY NEED THE MOST SIGNIFICANT COLORS.
$size = GetImageSize($img);
$scale = 1;
if ($size[0]>0)
$scale = min($this->config['check_on']['width']/$size[0], $this->config['check_on']['height']/$size[1]);
if ($scale < 1)
{
$width = floor($scale*$size[0]);
$height = floor($scale*$size[1]);
}
else
{
$width = $size[0];
$height = $size[1];
}
$image_resized = imagecreatetruecolor($width, $height);
if ($size[2] == 1)
$image_orig = imagecreatefromgif($img);
if ($size[2] == 2)
$image_orig = imagecreatefromjpeg($img);
if ($size[2] == 3)
$image_orig = imagecreatefrompng($img);
// WE NEED NEAREST NEIGHBOR RESIZING, BECAUSE IT DOESN'T ALTER THE COLORS
imagecopyresampled($image_resized, $image_orig, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
$im = $image_resized;
$imgWidth = imagesx($im);
$imgHeight = imagesy($im);
$total_pixel_count = 0;
for ($y=0; $y < $imgHeight; $y++)
{
for ($x=0; $x < $imgWidth; $x++)
{
$total_pixel_count++;
$index = imagecolorat($im,$x,$y);
$colors = imagecolorsforindex($im,$index);
// ROUND THE COLORS, TO REDUCE THE NUMBER OF DUPLICATE COLORS
if ( $this->config['delta'] > 1 )
{
$colors['red'] = intval((($colors['red'])+$half_delta)/$this->config['delta'])*$this->config['delta'];
$colors['green'] = intval((($colors['green'])+$half_delta)/$this->config['delta'])*$this->config['delta'];
$colors['blue'] = intval((($colors['blue'])+$half_delta)/$this->config['delta'])*$this->config['delta'];
if ($colors['red'] >= 256)
{
$colors['red'] = 255;
}
if ($colors['green'] >= 256)
{
$colors['green'] = 255;
}
if ($colors['blue'] >= 256)
{
$colors['blue'] = 255;
}
}
$hex = substr("0".dechex($colors['red']),-2).substr("0".dechex($colors['green']),-2).substr("0".dechex($colors['blue']),-2);
if ( ! isset( $hexarray[$hex] ) )
{
$hexarray[$hex] = 1;
}
else
{
$hexarray[$hex]++;
}
}
}
// Reduce gradient colors
if ( $this->config['reduce_gradients'] )
{
// if you want to *eliminate* gradient variations use:
// ksort( &$hexarray );
arsort( $hexarray, SORT_NUMERIC );
$gradients = array();
foreach ($hexarray as $hex => $num)
{
if ( ! isset($gradients[$hex]) )
{
$new_hex = $this->_find_adjacent( $hex, $gradients, $this->config['delta'] );
$gradients[$hex] = $new_hex;
}
else
{
$new_hex = $gradients[$hex];
}
if ($hex != $new_hex)
{
$hexarray[$hex] = 0;
$hexarray[$new_hex] += $num;
}
}
}
// Reduce brightness variations
if ( $this->config['reduce_brightness'] )
{
// if you want to *eliminate* brightness variations use:
// ksort( &$hexarray );
arsort( $hexarray, SORT_NUMERIC );
$brightness = array();
foreach ($hexarray as $hex => $num)
{
if ( ! isset($brightness[$hex]) )
{
$new_hex = $this->_normalize( $hex, $brightness, $this->config['delta'] );
$brightness[$hex] = $new_hex;
}
else
{
$new_hex = $brightness[$hex];
}
if ($hex != $new_hex)
{
$hexarray[$hex] = 0;
$hexarray[$new_hex] += $num;
}
}
}
arsort( $hexarray, SORT_NUMERIC );
// convert counts to percentages
foreach ($hexarray as $key => $value)
{
$hexarray[$key] = (float)$value / $total_pixel_count;
}
return $this->excludeHexColors( $hexarray );
}
else
{
$this->error = "Image ".$img." does not exist or is unreadable";
return false;
}
}
private function excludeHexColors ( $arr=array() )
{
if( count($arr) > 0 ) {
if( count($this->config['exclude_colors']) > 0 ){
$retArr = array();
foreach ($arr as $key => $value){
if( !in_array($key, $this->config['exclude_colors']) ){
$retArr[$key] = $value;
}
}
}
}
return $retArr;
}
private function _normalize( $hex, $hexarray )
{
$lowest = 255;
$highest = 0;
$colors['red'] = hexdec( substr( $hex, 0, 2 ) );
$colors['green'] = hexdec( substr( $hex, 2, 2 ) );
$colors['blue'] = hexdec( substr( $hex, 4, 2 ) );
if ($colors['red'] < $lowest)
{
$lowest = $colors['red'];
}
if ($colors['green'] < $lowest )
{
$lowest = $colors['green'];
}
if ($colors['blue'] < $lowest )
{
$lowest = $colors['blue'];
}
if ($colors['red'] > $highest)
{
$highest = $colors['red'];
}
if ($colors['green'] > $highest )
{
$highest = $colors['green'];
}
if ($colors['blue'] > $highest )
{
$highest = $colors['blue'];
}
// Do not normalize white, black, or shades of grey unless low delta
if ( $lowest == $highest )
{
if ($this->config['delta'] <= 32)
{
if ( $lowest == 0 || $highest >= (255 - $this->config['delta']) )
{
return $hex;
}
}
else
{
return $hex;
}
}
for (; $highest < 256; $lowest += $this->config['delta'], $highest += $this->config['delta'])
{
$new_hex = substr("0".dechex($colors['red'] - $lowest),-2).substr("0".dechex($colors['green'] - $lowest),-2).substr("0".dechex($colors['blue'] - $lowest),-2);
if ( isset( $hexarray[$new_hex] ) )
{
// same color, different brightness - use it instead
return $new_hex;
}
}
return $hex;
}
private function _find_adjacent( $hex, $gradients )
{
$red = hexdec( substr( $hex, 0, 2 ) );
$green = hexdec( substr( $hex, 2, 2 ) );
$blue = hexdec( substr( $hex, 4, 2 ) );
if ($red > $this->config['delta'])
{
$new_hex = substr("0".dechex($red - $this->config['delta']),-2).substr("0".dechex($green),-2).substr("0".dechex($blue),-2);
if ( isset($gradients[$new_hex]) )
{
return $gradients[$new_hex];
}
}
if ($green > $this->config['delta'])
{
$new_hex = substr("0".dechex($red),-2).substr("0".dechex($green - $this->config['delta']),-2).substr("0".dechex($blue),-2);
if ( isset($gradients[$new_hex]) )
{
return $gradients[$new_hex];
}
}
if ($blue > $this->config['delta'])
{
$new_hex = substr("0".dechex($red),-2).substr("0".dechex($green),-2).substr("0".dechex($blue - $this->config['delta']),-2);
if ( isset($gradients[$new_hex]) )
{
return $gradients[$new_hex];
}
}
if ($red < (255 - $this->config['delta']))
{
$new_hex = substr("0".dechex($red + $this->config['delta']),-2).substr("0".dechex($green),-2).substr("0".dechex($blue),-2);
if ( isset($gradients[$new_hex]) )
{
return $gradients[$new_hex];
}
}
if ($green < (255 - $this->config['delta']))
{
$new_hex = substr("0".dechex($red),-2).substr("0".dechex($green + $this->config['delta']),-2).substr("0".dechex($blue),-2);
if ( isset($gradients[$new_hex]) )
{
return $gradients[$new_hex];
}
}
if ($blue < (255 - $this->config['delta']))
{
$new_hex = substr("0".dechex($red),-2).substr("0".dechex($green),-2).substr("0".dechex($blue + $this->config['delta']),-2);
if ( isset($gradients[$new_hex]) )
{
return $gradients[$new_hex];
}
}
return $hex;
}
public function convertHexToColorNames ( $value='' )
{
if(trim($value) != ""){
$distances = array();
$val = $this->html2rgb($value);
foreach ($this->config['named_color'] as $name => $c) {
$distances[$name] = $this->distancel1($c, $val);
}
$mincolor = "";
$minval = pow(2, 30);
foreach ($distances as $k => $v) {
if ($v < $minval) {
$minval = $v;
$mincolor = $k;
}
}
return $mincolor;
}
return 'invalid color';
}
private function html2rgb ($color)
{
if ($color[0] == '#')
$color = substr($color, 1);
if (strlen($color) == 6)
list($r, $g, $b) = array(
$color[0].$color[1],
$color[2].$color[3],
$color[4].$color[5]
);
elseif (strlen($color) == 3)
list($r, $g, $b) = array($color[0].$color[0],
$color[1].$color[1], $color[2].$color[2]);
else
return false;
$r = hexdec($r); $g = hexdec($g); $b = hexdec($b);
return array($r, $g, $b);
}
private function distancel2(array $color1, array $color2) {
return sqrt(pow($color1[0] - $color2[0], 2) +
pow($color1[1] - $color2[1], 2) +
pow($color1[2] - $color2[2], 2));
}
private function distancel1(array $color1, array $color2) {
return abs($color1[0] - $color2[0]) +
abs($color1[1] - $color2[1]) +
abs($color1[2] - $color2[2]);
}
}