function hsl2rgb($h = 60, $s = 75, $l = 50)
{
// input: HSL color; output: RGB color (array)
$h = fmod(fmod($h, 360) + 360, 360);
// normalizing $hue to degree (0-359)
//$h = $h/360;
$h = $h / 359;
if ($s < 0) {
$s = 0;
}
if ($s > 100) {
$s = 100;
}
$s = $s / 100;
if ($l < 0) {
$l = 0;
}
if ($l > 100) {
$l = 100;
}
$l = $l / 100;
//printf('%5.45F',$s); echo '<br>';
if ($s == 0.0) {
$r = $g = $b = $l;
} else {
if ($l <= 0.5) {
$m2 = $l * ($s + 1);
} else {
$m2 = $l + $s - $l * $s;
}
$m1 = $l * 2 - $m2;
$r = hue($m1, $m2, $h + 1 / 3);
$g = hue($m1, $m2, $h);
$b = hue($m1, $m2, $h - 1 / 3);
}
$rgb = array(round($r * 255), round($g * 255), round($b * 255));
return $rgb;
}
function shifthue($image, $mode, $R, $G, $B)
{
//hue() function over every pixel of the image; goes for every pixel;
$img = imagecreatefrompng($image);
if ($R != NULL && $G != NULL && $B != NULL) {
$msk = file_get_contents($image . ".txt");
//$msk is a textfile that say which pixel should stay untouched
$t = 0;
//index for the mask
$size = getimagesize($image);
for ($i = 0; $i < $size[0]; $i++) {
for ($j = 0; $j < $size[1]; $j++) {
if ($msk[$t] == "1" || $msk == NULL) {
//draw a pixel if there is no mask file OR if the char in the mask says "1"
$rgb = imagecolorsforindex($img, imagecolorat($img, $i, $j));
//colors from the current pixel are red
$R1 = $rgb['red'];
$G1 = $rgb['green'];
$B1 = $rgb['blue'];
$hue = hue($R1, $G1, $B1, $R, $G, $B, $mode);
//new color is calculated
$colorInt = round($hue[2]);
$colorInt += round($hue[1]) << 8;
$colorInt += round($hue[0]) << 16;
//RGB is saved in a int so we can give it to "imagesetpixel()"
imagesetpixel($img, $i, $j, $colorInt);
}
$t++;
}
}
}
return $img;
}
*/
$file = __DIR__ . '/../colors.json';
$color_json = file_get_contents($file);
$colors = json_decode($color_json, true);
rename($file, $file . '.old');
foreach ($colors as &$color) {
extract($color);
list($r, $g, $b) = sscanf($hex, "#%02x%02x%02x");
// Normalize rgb
$r /= 255;
$g /= 255;
$b /= 255;
// Calculate min and max values
$min = min($r, $g, $b);
$max = max($r, $g, $b);
$color['hue'] = (360 + hue($r, $g, $b, $min, $max)) % 360;
$color['saturation'] = saturation($min, $max);
$color['value'] = $max;
$color['lightness'] = ($max + $min) / 2;
}
file_put_contents(__DIR__ . '/../colors.json', json_encode($colors));
function hue($r, $g, $b, $min, $max)
{
if ($max == $min) {
return 0;
}
$diff = $max - $min;
if ($max == $r) {
return 60 * (0 + ($g - $b) / $diff);
}
if ($max == $g) {