+++ /dev/null
-<?php
-
-class colors {
-
-/* Convert hexdec color string to rgb(a) string */
-
- function hex2rgba($color, $opacity = false) {
-
- $default = 'rgb(0,0,0)';
-
- //Return default if no color provided
- if(empty($color))
- return $default;
-
- //Sanitize $color if "#" is provided
- if ($color[0] == '#' ) {
- $color = substr( $color, 1 );
- }
-
- //Check if color has 6 or 3 characters and get values
- if (strlen($color) == 6) {
- $hex = array( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] );
- } elseif ( strlen( $color ) == 3 ) {
- $hex = array( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] );
- } else {
- return $default;
- }
-
- //Convert hexadec to rgb
- $rgb = array_map('hexdec', $hex);
-
- //Check if opacity is set(rgba or rgb)
- if($opacity){
- if(abs($opacity) > 1)
- $opacity = 1.0;
- $output = 'rgba('.implode(",",$rgb).','.$opacity.')';
- } else {
- $output = 'rgb('.implode(",",$rgb).')';
- }
-
- //Return rgb(a) color string
- return $output;
- }
-
- function hex2rgb( $colour ) {
- if ( $colour[0] == '#' ) {
- $colour = substr( $colour, 1 );
- }
- if ( strlen( $colour ) == 6 ) {
- list( $r, $g, $b ) = array( $colour[0] . $colour[1], $colour[2] . $colour[3], $colour[4] . $colour[5] );
- } elseif ( strlen( $colour ) == 3 ) {
- list( $r, $g, $b ) = array( $colour[0] . $colour[0], $colour[1] . $colour[1], $colour[2] . $colour[2] );
- } else {
- return false;
- }
- $r = hexdec( $r );
- $g = hexdec( $g );
- $b = hexdec( $b );
- return array( 'red' => $r, 'green' => $g, 'blue' => $b );
- }
-
-
- function rgbToHsl( $r, $g, $b ) {
- $oldR = $r;
- $oldG = $g;
- $oldB = $b;
- $r /= 255;
- $g /= 255;
- $b /= 255;
- $max = max( $r, $g, $b );
- $min = min( $r, $g, $b );
- $h;
- $s;
- $l = ( $max + $min ) / 2;
- $d = $max - $min;
-
- if( $d == 0 ){
- $h = $s = 0; // achromatic
- } else {
- $s = $d / ( 1 - abs( 2 * $l - 1 ) );
- switch( $max ){
- case $r:
- $h = 60 * fmod( ( ( $g - $b ) / $d ), 6 );
- if ($b > $g) {
- $h += 360;
- }
- break;
- case $g:
- $h = 60 * ( ( $b - $r ) / $d + 2 );
- break;
- case $b:
- $h = 60 * ( ( $r - $g ) / $d + 4 );
- break;
- }
- }
-
- return array( round( $h, 2 ), round( $s, 2 ), round( $l, 2 ) );
- }
- function hslToRgb( $h, $s, $l ){
- $r = "";
- $g = "";
- $b = "";
-
- $c = ( 1 - abs( 2 * $l - 1 ) ) * $s;
- $x = $c * ( 1 - abs( fmod( ( $h / 60 ), 2 ) - 1 ) );
- $m = $l - ( $c / 2 );
- if ( $h < 60 ) {
- $r = $c;
- $g = $x;
- $b = 0;
- } else if ( $h < 120 ) {
- $r = $x;
- $g = $c;
- $b = 0;
- } else if ( $h < 180 ) {
- $r = 0;
- $g = $c;
- $b = $x;
- } else if ( $h < 240 ) {
- $r = 0;
- $g = $x;
- $b = $c;
- } else if ( $h < 300 ) {
- $r = $x;
- $g = 0;
- $b = $c;
- } else {
- $r = $c;
- $g = 0;
- $b = $x;
- }
-
- $r = ( $r + $m ) * 255;
- $g = ( $g + $m ) * 255;
- $b = ( $b + $m ) * 255;
-
- return array( floor( $r ), floor( $g ), floor( $b ) );
- }
-
- /*
- * Som more example code - this needs to be deletet if we don't need it in
- * the future
- */
-
- function HTMLToRGB($htmlCode)
- {
- if($htmlCode[0] == '#')
- $htmlCode = substr($htmlCode, 1);
-
- if (strlen($htmlCode) == 3)
- {
- $htmlCode = $htmlCode[0] . $htmlCode[0] . $htmlCode[1] . $htmlCode[1] . $htmlCode[2] . $htmlCode[2];
- }
-
- $r = hexdec($htmlCode[0] . $htmlCode[1]);
- $g = hexdec($htmlCode[2] . $htmlCode[3]);
- $b = hexdec($htmlCode[4] . $htmlCode[5]);
-
- return $b + ($g << 0x8) + ($r << 0x10);
- }
-
- function RGBToHTML($RGB)
- {
- $r = 0xFF & ($RGB >> 0x10);
- $g = 0xFF & ($RGB >> 0x8);
- $b = 0xFF & $RGB;
-
- $r = dechex($r);
- $g = dechex($g);
- $b = dechex($b);
-
- return "#" . str_pad($r, 2, "0", STR_PAD_LEFT) . str_pad($g, 2, "0", STR_PAD_LEFT) . str_pad($b, 2, "0", STR_PAD_LEFT);
- }
-
- function ChangeLuminosity($RGB, $LuminosityPercent)
- {
- $HSL = RGBToHSL($RGB);
- $NewHSL = (int)(((float)$LuminosityPercent / 100) * 255) + (0xFFFF00 & $HSL);
- return HSLToRGB($NewHSL);
- }
-
- function RGBToHSL($RGB)
- {
- $r = 0xFF & ($RGB >> 0x10);
- $g = 0xFF & ($RGB >> 0x8);
- $b = 0xFF & $RGB;
-
- $r = ((float)$r) / 255.0;
- $g = ((float)$g) / 255.0;
- $b = ((float)$b) / 255.0;
-
- $maxC = max($r, $g, $b);
- $minC = min($r, $g, $b);
-
- $l = ($maxC + $minC) / 2.0;
-
- if($maxC == $minC)
- {
- $s = 0;
- $h = 0;
- }
- else
- {
- if($l < .5)
- {
- $s = ($maxC - $minC) / ($maxC + $minC);
- }
- else
- {
- $s = ($maxC - $minC) / (2.0 - $maxC - $minC);
- }
- if($r == $maxC)
- $h = ($g - $b) / ($maxC - $minC);
- if($g == $maxC)
- $h = 2.0 + ($b - $r) / ($maxC - $minC);
- if($b == $maxC)
- $h = 4.0 + ($r - $g) / ($maxC - $minC);
-
- $h = $h / 6.0;
- }
-
- $h = (int)round(255.0 * $h);
- $s = (int)round(255.0 * $s);
- $l = (int)round(255.0 * $l);
-
- $HSL = $l + ($s << 0x8) + ($h << 0x10);
- return $HSL;
- }
-
- function HSLToRGB($HSL)
- {
- $h = 0xFF & ($HSL >> 0x10);
- $s = 0xFF & ($HSL >> 0x8);
- $l = 0xFF & $HSL;
-
- $h = ((float)$h) / 255.0;
- $s = ((float)$s) / 255.0;
- $l = ((float)$l) / 255.0;
-
- if($s == 0)
- {
- $r = $l;
- $g = $l;
- $b = $l;
- }
- else
- {
- if($l < .5)
- {
- $t2 = $l * (1.0 + $s);
- }
- else
- {
- $t2 = ($l + $s) - ($l * $s);
- }
- $t1 = 2.0 * $l - $t2;
-
- $rt3 = $h + 1.0/3.0;
- $gt3 = $h;
- $bt3 = $h - 1.0/3.0;
-
- if($rt3 < 0) $rt3 += 1.0;
- if($rt3 > 1) $rt3 -= 1.0;
- if($gt3 < 0) $gt3 += 1.0;
- if($gt3 > 1) $gt3 -= 1.0;
- if($bt3 < 0) $bt3 += 1.0;
- if($bt3 > 1) $bt3 -= 1.0;
-
- if(6.0 * $rt3 < 1) $r = $t1 + ($t2 - $t1) * 6.0 * $rt3;
- elseif(2.0 * $rt3 < 1) $r = $t2;
- elseif(3.0 * $rt3 < 2) $r = $t1 + ($t2 - $t1) * ((2.0/3.0) - $rt3) * 6.0;
- else $r = $t1;
-
- if(6.0 * $gt3 < 1) $g = $t1 + ($t2 - $t1) * 6.0 * $gt3;
- elseif(2.0 * $gt3 < 1) $g = $t2;
- elseif(3.0 * $gt3 < 2) $g = $t1 + ($t2 - $t1) * ((2.0/3.0) - $gt3) * 6.0;
- else $g = $t1;
-
- if(6.0 * $bt3 < 1) $b = $t1 + ($t2 - $t1) * 6.0 * $bt3;
- elseif(2.0 * $bt3 < 1) $b = $t2;
- elseif(3.0 * $bt3 < 2) $b = $t1 + ($t2 - $t1) * ((2.0/3.0) - $bt3) * 6.0;
- else $b = $t1;
- }
-
- $r = (int)round(255.0 * $r);
- $g = (int)round(255.0 * $g);
- $b = (int)round(255.0 * $b);
-
- $RGB = $b + ($g << 0x8) + ($r << 0x10);
- return $RGB;
- }
-}
\ No newline at end of file
projects / friendica.git / commitdiff