| @@ -15,886 +15,890 @@ | ||
| 15 | 15 | */ |
| 16 | 16 | |
| 17 | 17 | // phpcs:disable WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid |
| 18 | 18 | |
| 19 | -/** | |
| 20 | - * Color utilities | |
| 21 | - */ | |
| 22 | -class Jetpack_Color { | |
| 19 | +if ( ! class_exists( 'Jetpack_Color' ) ) { | |
| 23 | 20 | /** |
| 24 | - * Color code (later array or string, depending on type) | |
| 25 | - * | |
| 26 | - * @var int|array|string | |
| 21 | + * Color utilities | |
| 27 | 22 | */ |
| 28 | - protected $color = 0; | |
| 23 | + class Jetpack_Color { | |
| 24 | + /** | |
| 25 | + * Color code (later array or string, depending on type) | |
| 26 | + * | |
| 27 | + * @var int|array|string | |
| 28 | + */ | |
| 29 | + protected $color = 0; | |
| 29 | 30 | |
| 30 | - /** | |
| 31 | - * Initialize object | |
| 32 | - * | |
| 33 | - * @param string|array $color A color of the type $type. | |
| 34 | - * @param string $type The type of color we will construct from. | |
| 35 | - * One of hex (default), rgb, hsl, int. | |
| 36 | - */ | |
| 37 | - public function __construct( $color = null, $type = 'hex' ) { | |
| 38 | - if ( $color ) { | |
| 39 | - switch ( $type ) { | |
| 40 | - case 'hex': | |
| 41 | - $this->fromHex( $color ); | |
| 42 | - break; | |
| 43 | - case 'rgb': | |
| 44 | - if ( is_array( $color ) && count( $color ) === 3 ) { | |
| 45 | - list( $r, $g, $b ) = array_values( $color ); | |
| 46 | - $this->fromRgbInt( $r, $g, $b ); | |
| 47 | - } | |
| 48 | - break; | |
| 49 | - case 'hsl': | |
| 50 | - if ( is_array( $color ) && count( $color ) === 3 ) { | |
| 51 | - list( $h, $s, $l ) = array_values( $color ); | |
| 52 | - $this->fromHsl( $h, $s, $l ); | |
| 53 | - } | |
| 54 | - break; | |
| 55 | - case 'int': | |
| 56 | - $this->fromInt( $color ); | |
| 57 | - break; | |
| 58 | - default: | |
| 59 | - // there is no default. | |
| 60 | - break; | |
| 31 | + /** | |
| 32 | + * Initialize object | |
| 33 | + * | |
| 34 | + * @param string|array $color A color of the type $type. | |
| 35 | + * @param string $type The type of color we will construct from. | |
| 36 | + * One of hex (default), rgb, hsl, int. | |
| 37 | + */ | |
| 38 | + public function __construct( $color = null, $type = 'hex' ) { | |
| 39 | + _deprecated_function( 'Jetpack_Color::__construct', 'jetpack-13.8' ); | |
| 40 | + | |
| 41 | + if ( $color ) { | |
| 42 | + switch ( $type ) { | |
| 43 | + case 'hex': | |
| 44 | + $this->fromHex( $color ); | |
| 45 | + break; | |
| 46 | + case 'rgb': | |
| 47 | + if ( is_array( $color ) && count( $color ) === 3 ) { | |
| 48 | + list( $r, $g, $b ) = array_values( $color ); | |
| 49 | + $this->fromRgbInt( $r, $g, $b ); | |
| 50 | + } | |
| 51 | + break; | |
| 52 | + case 'hsl': | |
| 53 | + if ( is_array( $color ) && count( $color ) === 3 ) { | |
| 54 | + list( $h, $s, $l ) = array_values( $color ); | |
| 55 | + $this->fromHsl( $h, $s, $l ); | |
| 56 | + } | |
| 57 | + break; | |
| 58 | + case 'int': | |
| 59 | + $this->fromInt( $color ); | |
| 60 | + break; | |
| 61 | + default: | |
| 62 | + // there is no default. | |
| 63 | + break; | |
| 64 | + } | |
| 61 | 65 | } |
| 62 | 66 | } |
| 63 | - } | |
| 64 | 67 | |
| 65 | - /** | |
| 66 | - * Init color from hex value | |
| 67 | - * | |
| 68 | - * @param string $hex_value Color hex value. | |
| 69 | - * | |
| 70 | - * @return $this | |
| 71 | - * @throws RangeException Invalid color code range error. | |
| 72 | - */ | |
| 73 | - public function fromHex( $hex_value ) { | |
| 74 | - $hex_value = str_replace( '#', '', $hex_value ); | |
| 75 | - // handle short hex codes like #fff. | |
| 76 | - if ( 3 === strlen( $hex_value ) ) { | |
| 77 | - $hex_value = $hex_value[0] . $hex_value[0] . $hex_value[1] . $hex_value[1] . $hex_value[2] . $hex_value[2]; | |
| 68 | + /** | |
| 69 | + * Init color from hex value | |
| 70 | + * | |
| 71 | + * @param string $hex_value Color hex value. | |
| 72 | + * | |
| 73 | + * @return $this | |
| 74 | + * @throws RangeException Invalid color code range error. | |
| 75 | + */ | |
| 76 | + public function fromHex( $hex_value ) { | |
| 77 | + $hex_value = str_replace( '#', '', $hex_value ); | |
| 78 | + // handle short hex codes like #fff. | |
| 79 | + if ( 3 === strlen( $hex_value ) ) { | |
| 80 | + $hex_value = $hex_value[0] . $hex_value[0] . $hex_value[1] . $hex_value[1] . $hex_value[2] . $hex_value[2]; | |
| 81 | + } | |
| 82 | + return $this->fromInt( hexdec( $hex_value ) ); | |
| 78 | 83 | } |
| 79 | - return $this->fromInt( hexdec( $hex_value ) ); | |
| 80 | - } | |
| 81 | 84 | |
| 82 | - /** | |
| 83 | - * Init color from integer RGB values | |
| 84 | - * | |
| 85 | - * @param int $red Red color code. | |
| 86 | - * @param int $green Green color code. | |
| 87 | - * @param int $blue Blue color code. | |
| 88 | - * | |
| 89 | - * @return $this | |
| 90 | - * @throws RangeException Invalid color code range error. | |
| 91 | - */ | |
| 92 | - public function fromRgbInt( $red, $green, $blue ) { | |
| 93 | - if ( $red < 0 || $red > 255 ) { | |
| 94 | - throw new RangeException( 'Red value ' . $red . ' out of valid color code range' ); | |
| 95 | - } | |
| 85 | + /** | |
| 86 | + * Init color from integer RGB values | |
| 87 | + * | |
| 88 | + * @param int $red Red color code. | |
| 89 | + * @param int $green Green color code. | |
| 90 | + * @param int $blue Blue color code. | |
| 91 | + * | |
| 92 | + * @return $this | |
| 93 | + * @throws RangeException Invalid color code range error. | |
| 94 | + */ | |
| 95 | + public function fromRgbInt( $red, $green, $blue ) { | |
| 96 | + if ( $red < 0 || $red > 255 ) { | |
| 97 | + throw new RangeException( 'Red value ' . $red . ' out of valid color code range' ); | |
| 98 | + } | |
| 96 | 99 | |
| 97 | - if ( $green < 0 || $green > 255 ) { | |
| 98 | - throw new RangeException( 'Green value ' . $green . ' out of valid color code range' ); | |
| 100 | + if ( $green < 0 || $green > 255 ) { | |
| 101 | + throw new RangeException( 'Green value ' . $green . ' out of valid color code range' ); | |
| 102 | + } | |
| 103 | + | |
| 104 | + if ( $blue < 0 || $blue > 255 ) { | |
| 105 | + throw new RangeException( 'Blue value ' . $blue . ' out of valid color code range' ); | |
| 106 | + } | |
| 107 | + | |
| 108 | + $this->color = ( intval( $red ) << 16 ) + ( intval( $green ) << 8 ) + intval( $blue ); | |
| 109 | + | |
| 110 | + return $this; | |
| 99 | 111 | } |
| 100 | 112 | |
| 101 | - if ( $blue < 0 || $blue > 255 ) { | |
| 102 | - throw new RangeException( 'Blue value ' . $blue . ' out of valid color code range' ); | |
| 113 | + /** | |
| 114 | + * Init color from hex RGB values | |
| 115 | + * | |
| 116 | + * @param string $red Red color code. | |
| 117 | + * @param string $green Green color code. | |
| 118 | + * @param string $blue Blue color code. | |
| 119 | + * | |
| 120 | + * @return $this | |
| 121 | + */ | |
| 122 | + public function fromRgbHex( $red, $green, $blue ) { | |
| 123 | + return $this->fromRgbInt( hexdec( $red ), hexdec( $green ), hexdec( $blue ) ); | |
| 103 | 124 | } |
| 104 | 125 | |
| 105 | - $this->color = (int) ( ( $red << 16 ) + ( $green << 8 ) + $blue ); | |
| 126 | + /** | |
| 127 | + * Converts an HSL color value to RGB. Conversion formula | |
| 128 | + * adapted from https://en.wikipedia.org/wiki/HSL_color_space. | |
| 129 | + * | |
| 130 | + * @param int $h Hue. [0-360]. | |
| 131 | + * @param int $s Saturation [0, 100]. | |
| 132 | + * @param int $l Lightness [0, 100]. | |
| 133 | + */ | |
| 134 | + public function fromHsl( $h, $s, $l ) { | |
| 135 | + $h /= 360; | |
| 136 | + $s /= 100; | |
| 137 | + $l /= 100; | |
| 106 | 138 | |
| 107 | - return $this; | |
| 108 | - } | |
| 139 | + if ( 0 === $s ) { | |
| 140 | + // achromatic. | |
| 141 | + $r = $l; | |
| 142 | + $g = $l; | |
| 143 | + $b = $l; | |
| 144 | + } else { | |
| 145 | + $q = $l < 0.5 ? $l * ( 1 + $s ) : $l + $s - $l * $s; | |
| 146 | + $p = 2 * $l - $q; | |
| 147 | + $r = $this->hue2rgb( $p, $q, $h + 1 / 3 ); | |
| 148 | + $g = $this->hue2rgb( $p, $q, $h ); | |
| 149 | + $b = $this->hue2rgb( $p, $q, $h - 1 / 3 ); | |
| 150 | + } | |
| 109 | 151 | |
| 110 | - /** | |
| 111 | - * Init color from hex RGB values | |
| 112 | - * | |
| 113 | - * @param string $red Red color code. | |
| 114 | - * @param string $green Green color code. | |
| 115 | - * @param string $blue Blue color code. | |
| 116 | - * | |
| 117 | - * @return $this | |
| 118 | - */ | |
| 119 | - public function fromRgbHex( $red, $green, $blue ) { | |
| 120 | - return $this->fromRgbInt( hexdec( $red ), hexdec( $green ), hexdec( $blue ) ); | |
| 121 | - } | |
| 152 | + return $this->fromRgbInt( $r * 255, $g * 255, $b * 255 ); | |
| 153 | + } | |
| 122 | 154 | |
| 123 | - /** | |
| 124 | - * Converts an HSL color value to RGB. Conversion formula | |
| 125 | - * adapted from https://en.wikipedia.org/wiki/HSL_color_space. | |
| 126 | - * | |
| 127 | - * @param int $h Hue. [0-360]. | |
| 128 | - * @param int $s Saturation [0, 100]. | |
| 129 | - * @param int $l Lightness [0, 100]. | |
| 130 | - */ | |
| 131 | - public function fromHsl( $h, $s, $l ) { | |
| 132 | - $h /= 360; | |
| 133 | - $s /= 100; | |
| 134 | - $l /= 100; | |
| 155 | + /** | |
| 156 | + * Helper function for Jetpack_Color::fromHsl() | |
| 157 | + * | |
| 158 | + * @param float $p Minimum of R/G/B [0, 1]. | |
| 159 | + * @param float $q Maximum of R/G/B [0, 1]. | |
| 160 | + * @param float $t Adjusted hue [0, 1]. | |
| 161 | + */ | |
| 162 | + private function hue2rgb( $p, $q, $t ) { | |
| 163 | + if ( $t < 0 ) { | |
| 164 | + ++$t; | |
| 165 | + } | |
| 166 | + if ( $t > 1 ) { | |
| 167 | + --$t; | |
| 168 | + } | |
| 169 | + if ( $t < 1 / 6 ) { | |
| 170 | + return $p + ( $q - $p ) * 6 * $t; | |
| 171 | + } | |
| 172 | + if ( $t < 1 / 2 ) { | |
| 173 | + return $q; | |
| 174 | + } | |
| 175 | + if ( $t < 2 / 3 ) { | |
| 176 | + return $p + ( $q - $p ) * ( 2 / 3 - $t ) * 6; | |
| 177 | + } | |
| 178 | + return $p; | |
| 179 | + } | |
| 135 | 180 | |
| 136 | - if ( 0 === $s ) { | |
| 137 | - // achromatic. | |
| 138 | - $r = $l; | |
| 139 | - $g = $l; | |
| 140 | - $b = $l; | |
| 141 | - } else { | |
| 142 | - $q = $l < 0.5 ? $l * ( 1 + $s ) : $l + $s - $l * $s; | |
| 143 | - $p = 2 * $l - $q; | |
| 144 | - $r = $this->hue2rgb( $p, $q, $h + 1 / 3 ); | |
| 145 | - $g = $this->hue2rgb( $p, $q, $h ); | |
| 146 | - $b = $this->hue2rgb( $p, $q, $h - 1 / 3 ); | |
| 147 | - } | |
| 181 | + /** | |
| 182 | + * Init color from integer value | |
| 183 | + * | |
| 184 | + * @param int $int_value Color code. | |
| 185 | + * | |
| 186 | + * @return $this | |
| 187 | + * @throws RangeException Invalid color code range error. | |
| 188 | + */ | |
| 189 | + public function fromInt( $int_value ) { | |
| 190 | + if ( $int_value < 0 || $int_value > 16777215 ) { | |
| 191 | + throw new RangeException( $int_value . ' out of valid color code range' ); | |
| 192 | + } | |
| 148 | 193 | |
| 149 | - return $this->fromRgbInt( $r * 255, $g * 255, $b * 255 ); | |
| 150 | - } | |
| 194 | + $this->color = $int_value; | |
| 151 | 195 | |
| 152 | - /** | |
| 153 | - * Helper function for Jetpack_Color::fromHsl() | |
| 154 | - * | |
| 155 | - * @param float $p Minimum of R/G/B [0, 1]. | |
| 156 | - * @param float $q Maximum of R/G/B [0, 1]. | |
| 157 | - * @param float $t Adjusted hue [0, 1]. | |
| 158 | - */ | |
| 159 | - private function hue2rgb( $p, $q, $t ) { | |
| 160 | - if ( $t < 0 ) { | |
| 161 | - ++$t; | |
| 196 | + return $this; | |
| 162 | 197 | } |
| 163 | - if ( $t > 1 ) { | |
| 164 | - --$t; | |
| 198 | + | |
| 199 | + /** | |
| 200 | + * Convert color to hex | |
| 201 | + * | |
| 202 | + * @return string | |
| 203 | + */ | |
| 204 | + public function toHex() { | |
| 205 | + return sprintf( '%06x', $this->color ); | |
| 165 | 206 | } |
| 166 | - if ( $t < 1 / 6 ) { | |
| 167 | - return $p + ( $q - $p ) * 6 * $t; | |
| 207 | + | |
| 208 | + /** | |
| 209 | + * Convert color to RGB array (integer values) | |
| 210 | + * | |
| 211 | + * @return array | |
| 212 | + */ | |
| 213 | + public function toRgbInt() { | |
| 214 | + return array( | |
| 215 | + 'red' => (int) ( 255 & ( $this->color >> 16 ) ), | |
| 216 | + 'green' => (int) ( 255 & ( $this->color >> 8 ) ), | |
| 217 | + 'blue' => (int) ( 255 & ( $this->color ) ), | |
| 218 | + ); | |
| 168 | 219 | } |
| 169 | - if ( $t < 1 / 2 ) { | |
| 170 | - return $q; | |
| 171 | - } | |
| 172 | - if ( $t < 2 / 3 ) { | |
| 173 | - return $p + ( $q - $p ) * ( 2 / 3 - $t ) * 6; | |
| 174 | - } | |
| 175 | - return $p; | |
| 176 | - } | |
| 177 | 220 | |
| 178 | - /** | |
| 179 | - * Init color from integer value | |
| 180 | - * | |
| 181 | - * @param int $int_value Color code. | |
| 182 | - * | |
| 183 | - * @return $this | |
| 184 | - * @throws RangeException Invalid color code range error. | |
| 185 | - */ | |
| 186 | - public function fromInt( $int_value ) { | |
| 187 | - if ( $int_value < 0 || $int_value > 16777215 ) { | |
| 188 | - throw new RangeException( $int_value . ' out of valid color code range' ); | |
| 221 | + /** | |
| 222 | + * Convert color to RGB array (hex values) | |
| 223 | + * | |
| 224 | + * @return array | |
| 225 | + */ | |
| 226 | + public function toRgbHex() { | |
| 227 | + $r = array(); | |
| 228 | + foreach ( $this->toRgbInt() as $item ) { | |
| 229 | + $r[] = dechex( $item ); | |
| 230 | + } | |
| 231 | + return $r; | |
| 189 | 232 | } |
| 190 | 233 | |
| 191 | - $this->color = $int_value; | |
| 234 | + /** | |
| 235 | + * Get Hue/Saturation/Value for the current color | |
| 236 | + * (float values, slow but accurate) | |
| 237 | + * | |
| 238 | + * @return array | |
| 239 | + */ | |
| 240 | + public function toHsvFloat() { | |
| 241 | + $rgb = $this->toRgbInt(); | |
| 192 | 242 | |
| 193 | - return $this; | |
| 194 | - } | |
| 243 | + $rgb_min = min( $rgb ); | |
| 244 | + $rgb_max = max( $rgb ); | |
| 195 | 245 | |
| 196 | - /** | |
| 197 | - * Convert color to hex | |
| 198 | - * | |
| 199 | - * @return string | |
| 200 | - */ | |
| 201 | - public function toHex() { | |
| 202 | - return sprintf( '%06x', $this->color ); | |
| 203 | - } | |
| 246 | + $hsv = array( | |
| 247 | + 'hue' => 0, | |
| 248 | + 'sat' => 0, | |
| 249 | + 'val' => $rgb_max, | |
| 250 | + ); | |
| 204 | 251 | |
| 205 | - /** | |
| 206 | - * Convert color to RGB array (integer values) | |
| 207 | - * | |
| 208 | - * @return array | |
| 209 | - */ | |
| 210 | - public function toRgbInt() { | |
| 211 | - return array( | |
| 212 | - 'red' => (int) ( 255 & ( $this->color >> 16 ) ), | |
| 213 | - 'green' => (int) ( 255 & ( $this->color >> 8 ) ), | |
| 214 | - 'blue' => (int) ( 255 & ( $this->color ) ), | |
| 215 | - ); | |
| 216 | - } | |
| 252 | + // If v is 0, color is black. | |
| 253 | + if ( 0 === $hsv['val'] ) { | |
| 254 | + return $hsv; | |
| 255 | + } | |
| 217 | 256 | |
| 218 | - /** | |
| 219 | - * Convert color to RGB array (hex values) | |
| 220 | - * | |
| 221 | - * @return array | |
| 222 | - */ | |
| 223 | - public function toRgbHex() { | |
| 224 | - $r = array(); | |
| 225 | - foreach ( $this->toRgbInt() as $item ) { | |
| 226 | - $r[] = dechex( $item ); | |
| 227 | - } | |
| 228 | - return $r; | |
| 229 | - } | |
| 257 | + // Normalize RGB values to 1. | |
| 258 | + $rgb['red'] /= $hsv['val']; | |
| 259 | + $rgb['green'] /= $hsv['val']; | |
| 260 | + $rgb['blue'] /= $hsv['val']; | |
| 261 | + $rgb_min = min( $rgb ); | |
| 262 | + $rgb_max = max( $rgb ); | |
| 230 | 263 | |
| 231 | - /** | |
| 232 | - * Get Hue/Saturation/Value for the current color | |
| 233 | - * (float values, slow but accurate) | |
| 234 | - * | |
| 235 | - * @return array | |
| 236 | - */ | |
| 237 | - public function toHsvFloat() { | |
| 238 | - $rgb = $this->toRgbInt(); | |
| 264 | + // Calculate saturation. | |
| 265 | + $hsv['sat'] = $rgb_max - $rgb_min; | |
| 266 | + if ( 0 === $hsv['sat'] ) { | |
| 267 | + $hsv['hue'] = 0; | |
| 268 | + return $hsv; | |
| 269 | + } | |
| 239 | 270 | |
| 240 | - $rgb_min = min( $rgb ); | |
| 241 | - $rgb_max = max( $rgb ); | |
| 271 | + // Normalize saturation to 1. | |
| 272 | + $rgb['red'] = ( $rgb['red'] - $rgb_min ) / ( $rgb_max - $rgb_min ); | |
| 273 | + $rgb['green'] = ( $rgb['green'] - $rgb_min ) / ( $rgb_max - $rgb_min ); | |
| 274 | + $rgb['blue'] = ( $rgb['blue'] - $rgb_min ) / ( $rgb_max - $rgb_min ); | |
| 275 | + $rgb_min = min( $rgb ); | |
| 276 | + $rgb_max = max( $rgb ); | |
| 242 | 277 | |
| 243 | - $hsv = array( | |
| 244 | - 'hue' => 0, | |
| 245 | - 'sat' => 0, | |
| 246 | - 'val' => $rgb_max, | |
| 247 | - ); | |
| 278 | + // Calculate hue. | |
| 279 | + if ( $rgb_max === $rgb['red'] ) { | |
| 280 | + $hsv['hue'] = 0.0 + 60 * ( $rgb['green'] - $rgb['blue'] ); | |
| 281 | + if ( $hsv['hue'] < 0 ) { | |
| 282 | + $hsv['hue'] += 360; | |
| 283 | + } | |
| 284 | + } elseif ( $rgb_max === $rgb['green'] ) { | |
| 285 | + $hsv['hue'] = 120 + ( 60 * ( $rgb['blue'] - $rgb['red'] ) ); | |
| 286 | + } else { | |
| 287 | + $hsv['hue'] = 240 + ( 60 * ( $rgb['red'] - $rgb['green'] ) ); | |
| 288 | + } | |
| 248 | 289 | |
| 249 | - // If v is 0, color is black. | |
| 250 | - if ( 0 === $hsv['val'] ) { | |
| 251 | 290 | return $hsv; |
| 252 | 291 | } |
| 253 | 292 | |
| 254 | - // Normalize RGB values to 1. | |
| 255 | - $rgb['red'] /= $hsv['val']; | |
| 256 | - $rgb['green'] /= $hsv['val']; | |
| 257 | - $rgb['blue'] /= $hsv['val']; | |
| 258 | - $rgb_min = min( $rgb ); | |
| 259 | - $rgb_max = max( $rgb ); | |
| 293 | + /** | |
| 294 | + * Get HSV values for color | |
| 295 | + * (integer values from 0-255, fast but less accurate) | |
| 296 | + * | |
| 297 | + * @return array | |
| 298 | + */ | |
| 299 | + public function toHsvInt() { | |
| 300 | + $rgb = $this->toRgbInt(); | |
| 260 | 301 | |
| 261 | - // Calculate saturation. | |
| 262 | - $hsv['sat'] = $rgb_max - $rgb_min; | |
| 263 | - if ( 0 === $hsv['sat'] ) { | |
| 264 | - $hsv['hue'] = 0; | |
| 265 | - return $hsv; | |
| 266 | - } | |
| 302 | + $rgb_min = min( $rgb ); | |
| 303 | + $rgb_max = max( $rgb ); | |
| 267 | 304 | |
| 268 | - // Normalize saturation to 1. | |
| 269 | - $rgb['red'] = ( $rgb['red'] - $rgb_min ) / ( $rgb_max - $rgb_min ); | |
| 270 | - $rgb['green'] = ( $rgb['green'] - $rgb_min ) / ( $rgb_max - $rgb_min ); | |
| 271 | - $rgb['blue'] = ( $rgb['blue'] - $rgb_min ) / ( $rgb_max - $rgb_min ); | |
| 272 | - $rgb_min = min( $rgb ); | |
| 273 | - $rgb_max = max( $rgb ); | |
| 305 | + $hsv = array( | |
| 306 | + 'hue' => 0, | |
| 307 | + 'sat' => 0, | |
| 308 | + 'val' => $rgb_max, | |
| 309 | + ); | |
| 274 | 310 | |
| 275 | - // Calculate hue. | |
| 276 | - if ( $rgb_max === $rgb['red'] ) { | |
| 277 | - $hsv['hue'] = 0.0 + 60 * ( $rgb['green'] - $rgb['blue'] ); | |
| 278 | - if ( $hsv['hue'] < 0 ) { | |
| 279 | - $hsv['hue'] += 360; | |
| 311 | + // If value is 0, color is black. | |
| 312 | + if ( 0 === $hsv['val'] ) { | |
| 313 | + return $hsv; | |
| 280 | 314 | } |
| 281 | - } elseif ( $rgb_max === $rgb['green'] ) { | |
| 282 | - $hsv['hue'] = 120 + ( 60 * ( $rgb['blue'] - $rgb['red'] ) ); | |
| 283 | - } else { | |
| 284 | - $hsv['hue'] = 240 + ( 60 * ( $rgb['red'] - $rgb['green'] ) ); | |
| 285 | - } | |
| 286 | 315 | |
| 287 | - return $hsv; | |
| 288 | - } | |
| 316 | + // Calculate saturation. | |
| 317 | + $hsv['sat'] = round( 255 * ( $rgb_max - $rgb_min ) / $hsv['val'] ); | |
| 318 | + if ( 0 === $hsv['sat'] ) { | |
| 319 | + $hsv['hue'] = 0; | |
| 320 | + return $hsv; | |
| 321 | + } | |
| 289 | 322 | |
| 290 | - /** | |
| 291 | - * Get HSV values for color | |
| 292 | - * (integer values from 0-255, fast but less accurate) | |
| 293 | - * | |
| 294 | - * @return array | |
| 295 | - */ | |
| 296 | - public function toHsvInt() { | |
| 297 | - $rgb = $this->toRgbInt(); | |
| 323 | + // Calculate hue. | |
| 324 | + if ( $rgb_max === $rgb['red'] ) { | |
| 325 | + $hsv['hue'] = round( 0 + 43 * ( $rgb['green'] - $rgb['blue'] ) / ( $rgb_max - $rgb_min ) ); | |
| 326 | + } elseif ( $rgb_max === $rgb['green'] ) { | |
| 327 | + $hsv['hue'] = round( 85 + 43 * ( $rgb['blue'] - $rgb['red'] ) / ( $rgb_max - $rgb_min ) ); | |
| 328 | + } else { | |
| 329 | + $hsv['hue'] = round( 171 + 43 * ( $rgb['red'] - $rgb['green'] ) / ( $rgb_max - $rgb_min ) ); | |
| 330 | + } | |
| 331 | + if ( $hsv['hue'] < 0 ) { | |
| 332 | + $hsv['hue'] += 255; | |
| 333 | + } | |
| 298 | 334 | |
| 299 | - $rgb_min = min( $rgb ); | |
| 300 | - $rgb_max = max( $rgb ); | |
| 301 | - | |
| 302 | - $hsv = array( | |
| 303 | - 'hue' => 0, | |
| 304 | - 'sat' => 0, | |
| 305 | - 'val' => $rgb_max, | |
| 306 | - ); | |
| 307 | - | |
| 308 | - // If value is 0, color is black. | |
| 309 | - if ( 0 === $hsv['val'] ) { | |
| 310 | 335 | return $hsv; |
| 311 | 336 | } |
| 312 | 337 | |
| 313 | - // Calculate saturation. | |
| 314 | - $hsv['sat'] = round( 255 * ( $rgb_max - $rgb_min ) / $hsv['val'] ); | |
| 315 | - if ( 0 === $hsv['sat'] ) { | |
| 316 | - $hsv['hue'] = 0; | |
| 317 | - return $hsv; | |
| 338 | + /** | |
| 339 | + * Converts an RGB color value to HSL. Conversion formula | |
| 340 | + * adapted from https://en.wikipedia.org/wiki/HSL_color_space. | |
| 341 | + * Assumes r, g, and b are contained in the set [0, 255] and | |
| 342 | + * returns h in [0, 360], s in [0, 100], l in [0, 100] | |
| 343 | + * | |
| 344 | + * @return Array The HSL representation | |
| 345 | + */ | |
| 346 | + public function toHsl() { | |
| 347 | + list( $r, $g, $b ) = array_values( $this->toRgbInt() ); | |
| 348 | + $r /= 255; | |
| 349 | + $g /= 255; | |
| 350 | + $b /= 255; | |
| 351 | + $max = max( $r, $g, $b ); | |
| 352 | + $min = min( $r, $g, $b ); | |
| 353 | + $l = ( $max + $min ) / 2; | |
| 354 | + | |
| 355 | + if ( $max === $min ) { | |
| 356 | + // achromatic. | |
| 357 | + $s = 0; | |
| 358 | + $h = 0; | |
| 359 | + } else { | |
| 360 | + $d = $max - $min; | |
| 361 | + $s = $l > 0.5 ? $d / ( 2 - $max - $min ) : $d / ( $max + $min ); | |
| 362 | + switch ( $max ) { | |
| 363 | + case $r: | |
| 364 | + $h = ( $g - $b ) / $d + ( $g < $b ? 6 : 0 ); | |
| 365 | + break; | |
| 366 | + case $g: | |
| 367 | + $h = ( $b - $r ) / $d + 2; | |
| 368 | + break; | |
| 369 | + case $b: | |
| 370 | + $h = ( $r - $g ) / $d + 4; | |
| 371 | + break; | |
| 372 | + } | |
| 373 | + $h /= 6; | |
| 374 | + } | |
| 375 | + $h = (int) round( $h * 360 ); | |
| 376 | + $s = (int) round( $s * 100 ); | |
| 377 | + $l = (int) round( $l * 100 ); | |
| 378 | + return compact( 'h', 's', 'l' ); | |
| 318 | 379 | } |
| 319 | 380 | |
| 320 | - // Calculate hue. | |
| 321 | - if ( $rgb_max === $rgb['red'] ) { | |
| 322 | - $hsv['hue'] = round( 0 + 43 * ( $rgb['green'] - $rgb['blue'] ) / ( $rgb_max - $rgb_min ) ); | |
| 323 | - } elseif ( $rgb_max === $rgb['green'] ) { | |
| 324 | - $hsv['hue'] = round( 85 + 43 * ( $rgb['blue'] - $rgb['red'] ) / ( $rgb_max - $rgb_min ) ); | |
| 325 | - } else { | |
| 326 | - $hsv['hue'] = round( 171 + 43 * ( $rgb['red'] - $rgb['green'] ) / ( $rgb_max - $rgb_min ) ); | |
| 381 | + /** | |
| 382 | + * From a color code to a string to be used in CSS declaration. | |
| 383 | + * | |
| 384 | + * @param string $type Color code type. | |
| 385 | + * @param int $alpha Transparency. | |
| 386 | + * | |
| 387 | + * @return string | |
| 388 | + */ | |
| 389 | + public function toCSS( $type = 'hex', $alpha = 1 ) { | |
| 390 | + switch ( $type ) { | |
| 391 | + case 'hex': | |
| 392 | + return $this->toString(); | |
| 393 | + case 'rgb': | |
| 394 | + case 'rgba': | |
| 395 | + list( $r, $g, $b ) = array_values( $this->toRgbInt() ); | |
| 396 | + if ( is_numeric( $alpha ) && $alpha < 1 ) { | |
| 397 | + return "rgba( {$r}, {$g}, {$b}, $alpha )"; | |
| 398 | + } else { | |
| 399 | + return "rgb( {$r}, {$g}, {$b} )"; | |
| 400 | + } | |
| 401 | + case 'hsl': | |
| 402 | + case 'hsla': | |
| 403 | + list( $h, $s, $l ) = array_values( $this->toHsl() ); | |
| 404 | + if ( is_numeric( $alpha ) && $alpha < 1 ) { | |
| 405 | + return "hsla( {$h}, {$s}, {$l}, $alpha )"; | |
| 406 | + } else { | |
| 407 | + return "hsl( {$h}, {$s}, {$l} )"; | |
| 408 | + } | |
| 409 | + default: | |
| 410 | + return $this->toString(); | |
| 411 | + } | |
| 327 | 412 | } |
| 328 | - if ( $hsv['hue'] < 0 ) { | |
| 329 | - $hsv['hue'] += 255; | |
| 330 | - } | |
| 331 | 413 | |
| 332 | - return $hsv; | |
| 333 | - } | |
| 414 | + /** | |
| 415 | + * Get current color in XYZ format | |
| 416 | + * | |
| 417 | + * @return array | |
| 418 | + */ | |
| 419 | + public function toXyz() { | |
| 420 | + $rgb = $this->toRgbInt(); | |
| 334 | 421 | |
| 335 | - /** | |
| 336 | - * Converts an RGB color value to HSL. Conversion formula | |
| 337 | - * adapted from https://en.wikipedia.org/wiki/HSL_color_space. | |
| 338 | - * Assumes r, g, and b are contained in the set [0, 255] and | |
| 339 | - * returns h in [0, 360], s in [0, 100], l in [0, 100] | |
| 340 | - * | |
| 341 | - * @return Array The HSL representation | |
| 342 | - */ | |
| 343 | - public function toHsl() { | |
| 344 | - list( $r, $g, $b ) = array_values( $this->toRgbInt() ); | |
| 345 | - $r /= 255; | |
| 346 | - $g /= 255; | |
| 347 | - $b /= 255; | |
| 348 | - $max = max( $r, $g, $b ); | |
| 349 | - $min = min( $r, $g, $b ); | |
| 350 | - $l = ( $max + $min ) / 2; | |
| 351 | - | |
| 352 | - if ( $max === $min ) { | |
| 353 | - // achromatic. | |
| 354 | - $s = 0; | |
| 355 | - $h = 0; | |
| 356 | - } else { | |
| 357 | - $d = $max - $min; | |
| 358 | - $s = $l > 0.5 ? $d / ( 2 - $max - $min ) : $d / ( $max + $min ); | |
| 359 | - switch ( $max ) { | |
| 360 | - case $r: | |
| 361 | - $h = ( $g - $b ) / $d + ( $g < $b ? 6 : 0 ); | |
| 362 | - break; | |
| 363 | - case $g: | |
| 364 | - $h = ( $b - $r ) / $d + 2; | |
| 365 | - break; | |
| 366 | - case $b: | |
| 367 | - $h = ( $r - $g ) / $d + 4; | |
| 368 | - break; | |
| 422 | + // Normalize RGB values to 1. | |
| 423 | + $rgb_new = array(); | |
| 424 | + foreach ( $rgb as $item ) { | |
| 425 | + $rgb_new[] = $item / 255; | |
| 369 | 426 | } |
| 370 | - $h /= 6; | |
| 371 | - } | |
| 372 | - $h = (int) round( $h * 360 ); | |
| 373 | - $s = (int) round( $s * 100 ); | |
| 374 | - $l = (int) round( $l * 100 ); | |
| 375 | - return compact( 'h', 's', 'l' ); | |
| 376 | - } | |
| 427 | + $rgb = $rgb_new; | |
| 377 | 428 | |
| 378 | - /** | |
| 379 | - * From a color code to a string to be used in CSS declaration. | |
| 380 | - * | |
| 381 | - * @param string $type Color code type. | |
| 382 | - * @param int $alpha Transparency. | |
| 383 | - * | |
| 384 | - * @return string | |
| 385 | - */ | |
| 386 | - public function toCSS( $type = 'hex', $alpha = 1 ) { | |
| 387 | - switch ( $type ) { | |
| 388 | - case 'hex': | |
| 389 | - return $this->toString(); | |
| 390 | - case 'rgb': | |
| 391 | - case 'rgba': | |
| 392 | - list( $r, $g, $b ) = array_values( $this->toRgbInt() ); | |
| 393 | - if ( is_numeric( $alpha ) && $alpha < 1 ) { | |
| 394 | - return "rgba( {$r}, {$g}, {$b}, $alpha )"; | |
| 429 | + $rgb_new = array(); | |
| 430 | + foreach ( $rgb as $item ) { | |
| 431 | + if ( $item > 0.04045 ) { | |
| 432 | + $item = pow( ( ( $item + 0.055 ) / 1.055 ), 2.4 ); | |
| 395 | 433 | } else { |
| 396 | - return "rgb( {$r}, {$g}, {$b} )"; | |
| 434 | + $item = $item / 12.92; | |
| 397 | 435 | } |
| 398 | - case 'hsl': | |
| 399 | - case 'hsla': | |
| 400 | - list( $h, $s, $l ) = array_values( $this->toHsl() ); | |
| 401 | - if ( is_numeric( $alpha ) && $alpha < 1 ) { | |
| 402 | - return "hsla( {$h}, {$s}, {$l}, $alpha )"; | |
| 403 | - } else { | |
| 404 | - return "hsl( {$h}, {$s}, {$l} )"; | |
| 405 | - } | |
| 406 | - default: | |
| 407 | - return $this->toString(); | |
| 408 | - } | |
| 409 | - } | |
| 436 | + $rgb_new[] = $item * 100; | |
| 437 | + } | |
| 438 | + $rgb = $rgb_new; | |
| 410 | 439 | |
| 411 | - /** | |
| 412 | - * Get current color in XYZ format | |
| 413 | - * | |
| 414 | - * @return array | |
| 415 | - */ | |
| 416 | - public function toXyz() { | |
| 417 | - $rgb = $this->toRgbInt(); | |
| 440 | + // Observer. = 2°, Illuminant = D65. | |
| 441 | + $xyz = array( | |
| 442 | + 'x' => ( $rgb['red'] * 0.4124 ) + ( $rgb['green'] * 0.3576 ) + ( $rgb['blue'] * 0.1805 ), | |
| 443 | + 'y' => ( $rgb['red'] * 0.2126 ) + ( $rgb['green'] * 0.7152 ) + ( $rgb['blue'] * 0.0722 ), | |
| 444 | + 'z' => ( $rgb['red'] * 0.0193 ) + ( $rgb['green'] * 0.1192 ) + ( $rgb['blue'] * 0.9505 ), | |
| 445 | + ); | |
| 418 | 446 | |
| 419 | - // Normalize RGB values to 1. | |
| 420 | - $rgb_new = array(); | |
| 421 | - foreach ( $rgb as $item ) { | |
| 422 | - $rgb_new[] = $item / 255; | |
| 447 | + return $xyz; | |
| 423 | 448 | } |
| 424 | - $rgb = $rgb_new; | |
| 425 | 449 | |
| 426 | - $rgb_new = array(); | |
| 427 | - foreach ( $rgb as $item ) { | |
| 428 | - if ( $item > 0.04045 ) { | |
| 429 | - $item = pow( ( ( $item + 0.055 ) / 1.055 ), 2.4 ); | |
| 430 | - } else { | |
| 431 | - $item = $item / 12.92; | |
| 432 | - } | |
| 433 | - $rgb_new[] = $item * 100; | |
| 434 | - } | |
| 435 | - $rgb = $rgb_new; | |
| 450 | + /** | |
| 451 | + * Get color CIE-Lab values | |
| 452 | + * | |
| 453 | + * @return array | |
| 454 | + */ | |
| 455 | + public function toLabCie() { | |
| 456 | + $xyz = $this->toXyz(); | |
| 436 | 457 | |
| 437 | - // Observer. = 2°, Illuminant = D65. | |
| 438 | - $xyz = array( | |
| 439 | - 'x' => ( $rgb['red'] * 0.4124 ) + ( $rgb['green'] * 0.3576 ) + ( $rgb['blue'] * 0.1805 ), | |
| 440 | - 'y' => ( $rgb['red'] * 0.2126 ) + ( $rgb['green'] * 0.7152 ) + ( $rgb['blue'] * 0.0722 ), | |
| 441 | - 'z' => ( $rgb['red'] * 0.0193 ) + ( $rgb['green'] * 0.1192 ) + ( $rgb['blue'] * 0.9505 ), | |
| 442 | - ); | |
| 458 | + // Ovserver = 2*, Iluminant=D65. | |
| 459 | + $xyz['x'] /= 95.047; | |
| 460 | + $xyz['y'] /= 100; | |
| 461 | + $xyz['z'] /= 108.883; | |
| 443 | 462 | |
| 444 | - return $xyz; | |
| 445 | - } | |
| 463 | + $xyz_new = array(); | |
| 464 | + foreach ( $xyz as $item ) { | |
| 465 | + if ( $item > 0.008856 ) { | |
| 466 | + $xyz_new[] = pow( $item, 1 / 3 ); | |
| 467 | + } else { | |
| 468 | + $xyz_new[] = ( 7.787 * $item ) + ( 16 / 116 ); | |
| 469 | + } | |
| 470 | + } | |
| 471 | + $xyz = $xyz_new; | |
| 446 | 472 | |
| 447 | - /** | |
| 448 | - * Get color CIE-Lab values | |
| 449 | - * | |
| 450 | - * @return array | |
| 451 | - */ | |
| 452 | - public function toLabCie() { | |
| 453 | - $xyz = $this->toXyz(); | |
| 473 | + $lab = array( | |
| 474 | + 'l' => ( 116 * $xyz['y'] ) - 16, | |
| 475 | + 'a' => 500 * ( $xyz['x'] - $xyz['y'] ), | |
| 476 | + 'b' => 200 * ( $xyz['y'] - $xyz['z'] ), | |
| 477 | + ); | |
| 454 | 478 | |
| 455 | - // Ovserver = 2*, Iluminant=D65. | |
| 456 | - $xyz['x'] /= 95.047; | |
| 457 | - $xyz['y'] /= 100; | |
| 458 | - $xyz['z'] /= 108.883; | |
| 479 | + return $lab; | |
| 480 | + } | |
| 459 | 481 | |
| 460 | - $xyz_new = array(); | |
| 461 | - foreach ( $xyz as $item ) { | |
| 462 | - if ( $item > 0.008856 ) { | |
| 463 | - $xyz_new[] = pow( $item, 1 / 3 ); | |
| 464 | - } else { | |
| 465 | - $xyz_new[] = ( 7.787 * $item ) + ( 16 / 116 ); | |
| 466 | - } | |
| 482 | + /** | |
| 483 | + * Convert color to integer | |
| 484 | + * | |
| 485 | + * @return int | |
| 486 | + */ | |
| 487 | + public function toInt() { | |
| 488 | + return $this->color; | |
| 467 | 489 | } |
| 468 | - $xyz = $xyz_new; | |
| 469 | 490 | |
| 470 | - $lab = array( | |
| 471 | - 'l' => ( 116 * $xyz['y'] ) - 16, | |
| 472 | - 'a' => 500 * ( $xyz['x'] - $xyz['y'] ), | |
| 473 | - 'b' => 200 * ( $xyz['y'] - $xyz['z'] ), | |
| 474 | - ); | |
| 491 | + /** | |
| 492 | + * Alias of toString() | |
| 493 | + * | |
| 494 | + * @return string | |
| 495 | + */ | |
| 496 | + public function __toString() { | |
| 497 | + return $this->toString(); | |
| 498 | + } | |
| 475 | 499 | |
| 476 | - return $lab; | |
| 477 | - } | |
| 500 | + /** | |
| 501 | + * Get color as string | |
| 502 | + * | |
| 503 | + * @return string | |
| 504 | + */ | |
| 505 | + public function toString() { | |
| 506 | + $str = $this->toHex(); | |
| 507 | + return strtoupper( "#{$str}" ); | |
| 508 | + } | |
| 478 | 509 | |
| 479 | - /** | |
| 480 | - * Convert color to integer | |
| 481 | - * | |
| 482 | - * @return int | |
| 483 | - */ | |
| 484 | - public function toInt() { | |
| 485 | - return $this->color; | |
| 486 | - } | |
| 510 | + /** | |
| 511 | + * Get the distance between this color and the given color | |
| 512 | + * | |
| 513 | + * @param Jetpack_Color $color Color code. | |
| 514 | + * | |
| 515 | + * @return int | |
| 516 | + */ | |
| 517 | + public function getDistanceRgbFrom( Jetpack_Color $color ) { | |
| 518 | + $rgb1 = $this->toRgbInt(); | |
| 519 | + $rgb2 = $color->toRgbInt(); | |
| 487 | 520 | |
| 488 | - /** | |
| 489 | - * Alias of toString() | |
| 490 | - * | |
| 491 | - * @return string | |
| 492 | - */ | |
| 493 | - public function __toString() { | |
| 494 | - return $this->toString(); | |
| 495 | - } | |
| 521 | + $r_diff = abs( $rgb1['red'] - $rgb2['red'] ); | |
| 522 | + $g_diff = abs( $rgb1['green'] - $rgb2['green'] ); | |
| 523 | + $b_diff = abs( $rgb1['blue'] - $rgb2['blue'] ); | |
| 496 | 524 | |
| 497 | - /** | |
| 498 | - * Get color as string | |
| 499 | - * | |
| 500 | - * @return string | |
| 501 | - */ | |
| 502 | - public function toString() { | |
| 503 | - $str = $this->toHex(); | |
| 504 | - return strtoupper( "#{$str}" ); | |
| 505 | - } | |
| 525 | + // Sum of RGB differences. | |
| 526 | + $diff = $r_diff + $g_diff + $b_diff; | |
| 527 | + return $diff; | |
| 528 | + } | |
| 506 | 529 | |
| 507 | - /** | |
| 508 | - * Get the distance between this color and the given color | |
| 509 | - * | |
| 510 | - * @param Jetpack_Color $color Color code. | |
| 511 | - * | |
| 512 | - * @return int | |
| 513 | - */ | |
| 514 | - public function getDistanceRgbFrom( Jetpack_Color $color ) { | |
| 515 | - $rgb1 = $this->toRgbInt(); | |
| 516 | - $rgb2 = $color->toRgbInt(); | |
| 530 | + /** | |
| 531 | + * Get distance from the given color using the Delta E method | |
| 532 | + * | |
| 533 | + * @param Jetpack_Color $color Color code. | |
| 534 | + * | |
| 535 | + * @return float | |
| 536 | + */ | |
| 537 | + public function getDistanceLabFrom( Jetpack_Color $color ) { | |
| 538 | + $lab1 = $this->toLabCie(); | |
| 539 | + $lab2 = $color->toLabCie(); | |
| 517 | 540 | |
| 518 | - $r_diff = abs( $rgb1['red'] - $rgb2['red'] ); | |
| 519 | - $g_diff = abs( $rgb1['green'] - $rgb2['green'] ); | |
| 520 | - $b_diff = abs( $rgb1['blue'] - $rgb2['blue'] ); | |
| 541 | + $l_diff = abs( $lab2['l'] - $lab1['l'] ); | |
| 542 | + $a_diff = abs( $lab2['a'] - $lab1['a'] ); | |
| 543 | + $b_diff = abs( $lab2['b'] - $lab1['b'] ); | |
| 521 | 544 | |
| 522 | - // Sum of RGB differences. | |
| 523 | - $diff = $r_diff + $g_diff + $b_diff; | |
| 524 | - return $diff; | |
| 525 | - } | |
| 545 | + $delta = sqrt( $l_diff + $a_diff + $b_diff ); | |
| 526 | 546 | |
| 527 | - /** | |
| 528 | - * Get distance from the given color using the Delta E method | |
| 529 | - * | |
| 530 | - * @param Jetpack_Color $color Color code. | |
| 531 | - * | |
| 532 | - * @return float | |
| 533 | - */ | |
| 534 | - public function getDistanceLabFrom( Jetpack_Color $color ) { | |
| 535 | - $lab1 = $this->toLabCie(); | |
| 536 | - $lab2 = $color->toLabCie(); | |
| 547 | + return $delta; | |
| 548 | + } | |
| 537 | 549 | |
| 538 | - $l_diff = abs( $lab2['l'] - $lab1['l'] ); | |
| 539 | - $a_diff = abs( $lab2['a'] - $lab1['a'] ); | |
| 540 | - $b_diff = abs( $lab2['b'] - $lab1['b'] ); | |
| 550 | + /** | |
| 551 | + * Calculate luminosity. | |
| 552 | + * | |
| 553 | + * @return float | |
| 554 | + */ | |
| 555 | + public function toLuminosity() { | |
| 556 | + $lum = array(); | |
| 557 | + foreach ( $this->toRgbInt() as $slot => $value ) { | |
| 558 | + $chan = $value / 255; | |
| 559 | + $lum[ $slot ] = ( $chan <= 0.03928 ) ? $chan / 12.92 : pow( ( ( $chan + 0.055 ) / 1.055 ), 2.4 ); | |
| 560 | + } | |
| 561 | + return 0.2126 * $lum['red'] + 0.7152 * $lum['green'] + 0.0722 * $lum['blue']; | |
| 562 | + } | |
| 541 | 563 | |
| 542 | - $delta = sqrt( $l_diff + $a_diff + $b_diff ); | |
| 564 | + /** | |
| 565 | + * Get distance between colors using luminance. | |
| 566 | + * Should be more than 5 for readable contrast | |
| 567 | + * | |
| 568 | + * @param Jetpack_Color $color Another color. | |
| 569 | + * @return float | |
| 570 | + */ | |
| 571 | + public function getDistanceLuminosityFrom( Jetpack_Color $color ) { | |
| 572 | + $l1 = $this->toLuminosity(); | |
| 573 | + $l2 = $color->toLuminosity(); | |
| 574 | + if ( $l1 > $l2 ) { | |
| 575 | + return ( $l1 + 0.05 ) / ( $l2 + 0.05 ); | |
| 576 | + } else { | |
| 577 | + return ( $l2 + 0.05 ) / ( $l1 + 0.05 ); | |
| 578 | + } | |
| 579 | + } | |
| 543 | 580 | |
| 544 | - return $delta; | |
| 545 | - } | |
| 546 | - | |
| 547 | - /** | |
| 548 | - * Calculate luminosity. | |
| 549 | - * | |
| 550 | - * @return float | |
| 551 | - */ | |
| 552 | - public function toLuminosity() { | |
| 553 | - $lum = array(); | |
| 554 | - foreach ( $this->toRgbInt() as $slot => $value ) { | |
| 555 | - $chan = $value / 255; | |
| 556 | - $lum[ $slot ] = ( $chan <= 0.03928 ) ? $chan / 12.92 : pow( ( ( $chan + 0.055 ) / 1.055 ), 2.4 ); | |
| 581 | + /** | |
| 582 | + * Get maximum contrast color. | |
| 583 | + * | |
| 584 | + * @return $this | |
| 585 | + */ | |
| 586 | + public function getMaxContrastColor() { | |
| 587 | + $with_black = $this->getDistanceLuminosityFrom( new Jetpack_Color( '#000' ) ); | |
| 588 | + $with_white = $this->getDistanceLuminosityFrom( new Jetpack_Color( '#fff' ) ); | |
| 589 | + $color = new Jetpack_Color(); | |
| 590 | + $hex = ( $with_black >= $with_white ) ? '#000000' : '#ffffff'; | |
| 591 | + return $color->fromHex( $hex ); | |
| 557 | 592 | } |
| 558 | - return 0.2126 * $lum['red'] + 0.7152 * $lum['green'] + 0.0722 * $lum['blue']; | |
| 559 | - } | |
| 560 | 593 | |
| 561 | - /** | |
| 562 | - * Get distance between colors using luminance. | |
| 563 | - * Should be more than 5 for readable contrast | |
| 564 | - * | |
| 565 | - * @param Jetpack_Color $color Another color. | |
| 566 | - * @return float | |
| 567 | - */ | |
| 568 | - public function getDistanceLuminosityFrom( Jetpack_Color $color ) { | |
| 569 | - $l1 = $this->toLuminosity(); | |
| 570 | - $l2 = $color->toLuminosity(); | |
| 571 | - if ( $l1 > $l2 ) { | |
| 572 | - return ( $l1 + 0.05 ) / ( $l2 + 0.05 ); | |
| 573 | - } else { | |
| 574 | - return ( $l2 + 0.05 ) / ( $l1 + 0.05 ); | |
| 575 | - } | |
| 576 | - } | |
| 594 | + /** | |
| 595 | + * Get grayscale contrasting color. | |
| 596 | + * | |
| 597 | + * @param bool|int $contrast Contrast. | |
| 598 | + * | |
| 599 | + * @return $this | |
| 600 | + */ | |
| 601 | + public function getGrayscaleContrastingColor( $contrast = false ) { | |
| 602 | + if ( ! $contrast ) { | |
| 603 | + return $this->getMaxContrastColor(); | |
| 604 | + } | |
| 605 | + // don't allow less than 5. | |
| 606 | + $target_contrast = ( $contrast < 5 ) ? 5 : $contrast; | |
| 607 | + $color = $this->getMaxContrastColor(); | |
| 608 | + $contrast = $color->getDistanceLuminosityFrom( $this ); | |
| 577 | 609 | |
| 578 | - /** | |
| 579 | - * Get maximum contrast color. | |
| 580 | - * | |
| 581 | - * @return $this | |
| 582 | - */ | |
| 583 | - public function getMaxContrastColor() { | |
| 584 | - $with_black = $this->getDistanceLuminosityFrom( new Jetpack_Color( '#000' ) ); | |
| 585 | - $with_white = $this->getDistanceLuminosityFrom( new Jetpack_Color( '#fff' ) ); | |
| 586 | - $color = new Jetpack_Color(); | |
| 587 | - $hex = ( $with_black >= $with_white ) ? '#000000' : '#ffffff'; | |
| 588 | - return $color->fromHex( $hex ); | |
| 589 | - } | |
| 610 | + // if current max contrast is less than the target contrast, we had wishful thinking. | |
| 611 | + if ( $contrast <= $target_contrast ) { | |
| 612 | + return $color; | |
| 613 | + } | |
| 590 | 614 | |
| 591 | - /** | |
| 592 | - * Get grayscale contrasting color. | |
| 593 | - * | |
| 594 | - * @param bool|int $contrast Contrast. | |
| 595 | - * | |
| 596 | - * @return $this | |
| 597 | - */ | |
| 598 | - public function getGrayscaleContrastingColor( $contrast = false ) { | |
| 599 | - if ( ! $contrast ) { | |
| 600 | - return $this->getMaxContrastColor(); | |
| 601 | - } | |
| 602 | - // don't allow less than 5. | |
| 603 | - $target_contrast = ( $contrast < 5 ) ? 5 : $contrast; | |
| 604 | - $color = $this->getMaxContrastColor(); | |
| 605 | - $contrast = $color->getDistanceLuminosityFrom( $this ); | |
| 615 | + $incr = ( '#000000' === $color->toString() ) ? 1 : -1; | |
| 616 | + while ( $contrast > $target_contrast ) { | |
| 617 | + $color = $color->incrementLightness( $incr ); | |
| 618 | + $contrast = $color->getDistanceLuminosityFrom( $this ); | |
| 619 | + } | |
| 606 | 620 | |
| 607 | - // if current max contrast is less than the target contrast, we had wishful thinking. | |
| 608 | - if ( $contrast <= $target_contrast ) { | |
| 609 | 621 | return $color; |
| 610 | 622 | } |
| 611 | 623 | |
| 612 | - $incr = ( '#000000' === $color->toString() ) ? 1 : -1; | |
| 613 | - while ( $contrast > $target_contrast ) { | |
| 614 | - $color = $color->incrementLightness( $incr ); | |
| 615 | - $contrast = $color->getDistanceLuminosityFrom( $this ); | |
| 616 | - } | |
| 624 | + /** | |
| 625 | + * Gets a readable contrasting color. $this is assumed to be the text and $color the background color. | |
| 626 | + * | |
| 627 | + * @param object $bg_color A Color object that will be compared against $this. | |
| 628 | + * @param integer $min_contrast The minimum contrast to achieve, if possible. | |
| 629 | + * @return object A Color object, an increased contrast $this compared against $bg_color | |
| 630 | + */ | |
| 631 | + public function getReadableContrastingColor( $bg_color = false, $min_contrast = 5 ) { | |
| 632 | + if ( ! $bg_color || ! is_a( $bg_color, 'Jetpack_Color' ) ) { | |
| 633 | + return $this; | |
| 634 | + } | |
| 635 | + // you shouldn't use less than 5, but you might want to. | |
| 636 | + $target_contrast = $min_contrast; | |
| 637 | + // working things. | |
| 638 | + $contrast = $bg_color->getDistanceLuminosityFrom( $this ); | |
| 639 | + $max_contrast_color = $bg_color->getMaxContrastColor(); | |
| 640 | + $max_contrast = $max_contrast_color->getDistanceLuminosityFrom( $bg_color ); | |
| 617 | 641 | |
| 618 | - return $color; | |
| 619 | - } | |
| 642 | + // if current max contrast is less than the target contrast, we had wishful thinking. | |
| 643 | + // still, go max. | |
| 644 | + if ( $max_contrast <= $target_contrast ) { | |
| 645 | + return $max_contrast_color; | |
| 646 | + } | |
| 647 | + // or, we might already have sufficient contrast. | |
| 648 | + if ( $contrast >= $target_contrast ) { | |
| 649 | + return $this; | |
| 650 | + } | |
| 620 | 651 | |
| 621 | - /** | |
| 622 | - * Gets a readable contrasting color. $this is assumed to be the text and $color the background color. | |
| 623 | - * | |
| 624 | - * @param object $bg_color A Color object that will be compared against $this. | |
| 625 | - * @param integer $min_contrast The minimum contrast to achieve, if possible. | |
| 626 | - * @return object A Color object, an increased contrast $this compared against $bg_color | |
| 627 | - */ | |
| 628 | - public function getReadableContrastingColor( $bg_color = false, $min_contrast = 5 ) { | |
| 629 | - if ( ! $bg_color || ! is_a( $bg_color, 'Jetpack_Color' ) ) { | |
| 652 | + $incr = ( 0 === $max_contrast_color->toInt() ) ? -1 : 1; | |
| 653 | + while ( $contrast < $target_contrast ) { | |
| 654 | + $this->incrementLightness( $incr ); | |
| 655 | + $contrast = $bg_color->getDistanceLuminosityFrom( $this ); | |
| 656 | + // infininite loop prevention: you never know. | |
| 657 | + if ( 0 === $this->color || 16777215 === $this->color ) { | |
| 658 | + break; | |
| 659 | + } | |
| 660 | + } | |
| 661 | + | |
| 630 | 662 | return $this; |
| 631 | 663 | } |
| 632 | - // you shouldn't use less than 5, but you might want to. | |
| 633 | - $target_contrast = $min_contrast; | |
| 634 | - // working things. | |
| 635 | - $contrast = $bg_color->getDistanceLuminosityFrom( $this ); | |
| 636 | - $max_contrast_color = $bg_color->getMaxContrastColor(); | |
| 637 | - $max_contrast = $max_contrast_color->getDistanceLuminosityFrom( $bg_color ); | |
| 638 | 664 | |
| 639 | - // if current max contrast is less than the target contrast, we had wishful thinking. | |
| 640 | - // still, go max. | |
| 641 | - if ( $max_contrast <= $target_contrast ) { | |
| 642 | - return $max_contrast_color; | |
| 665 | + /** | |
| 666 | + * Detect if color is grayscale | |
| 667 | + * | |
| 668 | + * @param int $threshold Max difference between colors. | |
| 669 | + * | |
| 670 | + * @return bool | |
| 671 | + */ | |
| 672 | + public function isGrayscale( $threshold = 16 ) { | |
| 673 | + $rgb = $this->toRgbInt(); | |
| 674 | + | |
| 675 | + // Get min and max rgb values, then difference between them. | |
| 676 | + $rgb_min = min( $rgb ); | |
| 677 | + $rgb_max = max( $rgb ); | |
| 678 | + $diff = $rgb_max - $rgb_min; | |
| 679 | + | |
| 680 | + return $diff < $threshold; | |
| 643 | 681 | } |
| 644 | - // or, we might already have sufficient contrast. | |
| 645 | - if ( $contrast >= $target_contrast ) { | |
| 646 | - return $this; | |
| 647 | - } | |
| 648 | 682 | |
| 649 | - $incr = ( 0 === $max_contrast_color->toInt() ) ? -1 : 1; | |
| 650 | - while ( $contrast < $target_contrast ) { | |
| 651 | - $this->incrementLightness( $incr ); | |
| 652 | - $contrast = $bg_color->getDistanceLuminosityFrom( $this ); | |
| 653 | - // infininite loop prevention: you never know. | |
| 654 | - if ( 0 === $this->color || 16777215 === $this->color ) { | |
| 655 | - break; | |
| 683 | + /** | |
| 684 | + * Get the closest matching color from the given array of colors | |
| 685 | + * | |
| 686 | + * @param array $colors array of integers or Jetpack_Color objects. | |
| 687 | + * | |
| 688 | + * @return mixed the array key of the matched color | |
| 689 | + */ | |
| 690 | + public function getClosestMatch( array $colors ) { | |
| 691 | + $match_dist = 10000; | |
| 692 | + $match_key = null; | |
| 693 | + foreach ( $colors as $key => $color ) { | |
| 694 | + if ( false === ( $color instanceof Jetpack_Color ) ) { | |
| 695 | + $c = new Jetpack_Color( $color ); | |
| 696 | + } | |
| 697 | + $dist = $this->getDistanceLabFrom( $c ); | |
| 698 | + if ( $dist < $match_dist ) { | |
| 699 | + $match_dist = $dist; | |
| 700 | + $match_key = $key; | |
| 701 | + } | |
| 656 | 702 | } |
| 703 | + | |
| 704 | + return $match_key; | |
| 657 | 705 | } |
| 658 | 706 | |
| 659 | - return $this; | |
| 660 | - } | |
| 707 | + /* TRANSFORMS */ | |
| 661 | 708 | |
| 662 | - /** | |
| 663 | - * Detect if color is grayscale | |
| 664 | - * | |
| 665 | - * @param int $threshold Max difference between colors. | |
| 666 | - * | |
| 667 | - * @return bool | |
| 668 | - */ | |
| 669 | - public function isGrayscale( $threshold = 16 ) { | |
| 670 | - $rgb = $this->toRgbInt(); | |
| 709 | + /** | |
| 710 | + * Transform -- Darken color. | |
| 711 | + * | |
| 712 | + * @param int $amount Amount. Default to 5. | |
| 713 | + * | |
| 714 | + * @return $this | |
| 715 | + */ | |
| 716 | + public function darken( $amount = 5 ) { | |
| 717 | + return $this->incrementLightness( - $amount ); | |
| 718 | + } | |
| 671 | 719 | |
| 672 | - // Get min and max rgb values, then difference between them. | |
| 673 | - $rgb_min = min( $rgb ); | |
| 674 | - $rgb_max = max( $rgb ); | |
| 675 | - $diff = $rgb_max - $rgb_min; | |
| 720 | + /** | |
| 721 | + * Transform -- Lighten color. | |
| 722 | + * | |
| 723 | + * @param int $amount Amount. Default to 5. | |
| 724 | + * | |
| 725 | + * @return $this | |
| 726 | + */ | |
| 727 | + public function lighten( $amount = 5 ) { | |
| 728 | + return $this->incrementLightness( $amount ); | |
| 729 | + } | |
| 676 | 730 | |
| 677 | - return $diff < $threshold; | |
| 678 | - } | |
| 731 | + /** | |
| 732 | + * Transform -- Increment lightness. | |
| 733 | + * | |
| 734 | + * @param int $amount Amount. | |
| 735 | + * | |
| 736 | + * @return $this | |
| 737 | + */ | |
| 738 | + public function incrementLightness( $amount ) { | |
| 739 | + $hsl = $this->toHsl(); | |
| 679 | 740 | |
| 680 | - /** | |
| 681 | - * Get the closest matching color from the given array of colors | |
| 682 | - * | |
| 683 | - * @param array $colors array of integers or Jetpack_Color objects. | |
| 684 | - * | |
| 685 | - * @return mixed the array key of the matched color | |
| 686 | - */ | |
| 687 | - public function getClosestMatch( array $colors ) { | |
| 688 | - $match_dist = 10000; | |
| 689 | - $match_key = null; | |
| 690 | - foreach ( $colors as $key => $color ) { | |
| 691 | - if ( false === ( $color instanceof Jetpack_Color ) ) { | |
| 692 | - $c = new Jetpack_Color( $color ); | |
| 741 | + $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 742 | + $s = isset( $hsl['s'] ) ? $hsl['s'] : 0; | |
| 743 | + $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 744 | + | |
| 745 | + $l += $amount; | |
| 746 | + if ( $l < 0 ) { | |
| 747 | + $l = 0; | |
| 693 | 748 | } |
| 694 | - $dist = $this->getDistanceLabFrom( $c ); | |
| 695 | - if ( $dist < $match_dist ) { | |
| 696 | - $match_dist = $dist; | |
| 697 | - $match_key = $key; | |
| 749 | + if ( $l > 100 ) { | |
| 750 | + $l = 100; | |
| 698 | 751 | } |
| 752 | + return $this->fromHsl( $h, $s, $l ); | |
| 699 | 753 | } |
| 700 | 754 | |
| 701 | - return $match_key; | |
| 702 | - } | |
| 755 | + /** | |
| 756 | + * Transform -- Saturate color. | |
| 757 | + * | |
| 758 | + * @param int $amount Amount. Default to 15. | |
| 759 | + * | |
| 760 | + * @return $this | |
| 761 | + */ | |
| 762 | + public function saturate( $amount = 15 ) { | |
| 763 | + return $this->incrementSaturation( $amount ); | |
| 764 | + } | |
| 703 | 765 | |
| 704 | - /* TRANSFORMS */ | |
| 766 | + /** | |
| 767 | + * Transform -- Desaturate color. | |
| 768 | + * | |
| 769 | + * @param int $amount Amount. Default to 15. | |
| 770 | + * | |
| 771 | + * @return $this | |
| 772 | + */ | |
| 773 | + public function desaturate( $amount = 15 ) { | |
| 774 | + return $this->incrementSaturation( - $amount ); | |
| 775 | + } | |
| 705 | 776 | |
| 706 | - /** | |
| 707 | - * Transform -- Darken color. | |
| 708 | - * | |
| 709 | - * @param int $amount Amount. Default to 5. | |
| 710 | - * | |
| 711 | - * @return $this | |
| 712 | - */ | |
| 713 | - public function darken( $amount = 5 ) { | |
| 714 | - return $this->incrementLightness( - $amount ); | |
| 715 | - } | |
| 777 | + /** | |
| 778 | + * Transform -- Increment saturation. | |
| 779 | + * | |
| 780 | + * @param int $amount Amount. | |
| 781 | + * | |
| 782 | + * @return $this | |
| 783 | + */ | |
| 784 | + public function incrementSaturation( $amount ) { | |
| 785 | + $hsl = $this->toHsl(); | |
| 716 | 786 | |
| 717 | - /** | |
| 718 | - * Transform -- Lighten color. | |
| 719 | - * | |
| 720 | - * @param int $amount Amount. Default to 5. | |
| 721 | - * | |
| 722 | - * @return $this | |
| 723 | - */ | |
| 724 | - public function lighten( $amount = 5 ) { | |
| 725 | - return $this->incrementLightness( $amount ); | |
| 726 | - } | |
| 787 | + $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 788 | + $s = isset( $hsl['s'] ) ? $hsl['s'] : 0; | |
| 789 | + $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 727 | 790 | |
| 728 | - /** | |
| 729 | - * Transform -- Increment lightness. | |
| 730 | - * | |
| 731 | - * @param int $amount Amount. | |
| 732 | - * | |
| 733 | - * @return $this | |
| 734 | - */ | |
| 735 | - public function incrementLightness( $amount ) { | |
| 736 | - $hsl = $this->toHsl(); | |
| 737 | - | |
| 738 | - $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 739 | - $s = isset( $hsl['s'] ) ? $hsl['s'] : 0; | |
| 740 | - $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 741 | - | |
| 742 | - $l += $amount; | |
| 743 | - if ( $l < 0 ) { | |
| 744 | - $l = 0; | |
| 791 | + $s += $amount; | |
| 792 | + if ( $s < 0 ) { | |
| 793 | + $s = 0; | |
| 794 | + } | |
| 795 | + if ( $s > 100 ) { | |
| 796 | + $s = 100; | |
| 797 | + } | |
| 798 | + return $this->fromHsl( $h, $s, $l ); | |
| 745 | 799 | } |
| 746 | - if ( $l > 100 ) { | |
| 747 | - $l = 100; | |
| 748 | - } | |
| 749 | - return $this->fromHsl( $h, $s, $l ); | |
| 750 | - } | |
| 751 | 800 | |
| 752 | - /** | |
| 753 | - * Transform -- Saturate color. | |
| 754 | - * | |
| 755 | - * @param int $amount Amount. Default to 15. | |
| 756 | - * | |
| 757 | - * @return $this | |
| 758 | - */ | |
| 759 | - public function saturate( $amount = 15 ) { | |
| 760 | - return $this->incrementSaturation( $amount ); | |
| 761 | - } | |
| 801 | + /** | |
| 802 | + * Transform -- To grayscale. | |
| 803 | + * | |
| 804 | + * @return $this | |
| 805 | + */ | |
| 806 | + public function toGrayscale() { | |
| 807 | + $hsl = $this->toHsl(); | |
| 762 | 808 | |
| 763 | - /** | |
| 764 | - * Transform -- Desaturate color. | |
| 765 | - * | |
| 766 | - * @param int $amount Amount. Default to 15. | |
| 767 | - * | |
| 768 | - * @return $this | |
| 769 | - */ | |
| 770 | - public function desaturate( $amount = 15 ) { | |
| 771 | - return $this->incrementSaturation( - $amount ); | |
| 772 | - } | |
| 809 | + $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 810 | + $s = 0; | |
| 811 | + $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 773 | 812 | |
| 774 | - /** | |
| 775 | - * Transform -- Increment saturation. | |
| 776 | - * | |
| 777 | - * @param int $amount Amount. | |
| 778 | - * | |
| 779 | - * @return $this | |
| 780 | - */ | |
| 781 | - public function incrementSaturation( $amount ) { | |
| 782 | - $hsl = $this->toHsl(); | |
| 813 | + return $this->fromHsl( $h, $s, $l ); | |
| 814 | + } | |
| 783 | 815 | |
| 784 | - $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 785 | - $s = isset( $hsl['s'] ) ? $hsl['s'] : 0; | |
| 786 | - $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 816 | + /** | |
| 817 | + * Transform -- To the complementary color. | |
| 818 | + * | |
| 819 | + * The complement is the color on the opposite side of the color wheel, 180° away. | |
| 820 | + * | |
| 821 | + * @return $this | |
| 822 | + */ | |
| 823 | + public function getComplement() { | |
| 824 | + return $this->incrementHue( 180 ); | |
| 825 | + } | |
| 787 | 826 | |
| 788 | - $s += $amount; | |
| 789 | - if ( $s < 0 ) { | |
| 790 | - $s = 0; | |
| 827 | + /** | |
| 828 | + * Transform -- To an analogous color of the complement. | |
| 829 | + * | |
| 830 | + * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 831 | + * | |
| 832 | + * @return $this | |
| 833 | + */ | |
| 834 | + public function getSplitComplement( $step = 1 ) { | |
| 835 | + $incr = 180 + ( $step * 30 ); | |
| 836 | + return $this->incrementHue( $incr ); | |
| 791 | 837 | } |
| 792 | - if ( $s > 100 ) { | |
| 793 | - $s = 100; | |
| 838 | + | |
| 839 | + /** | |
| 840 | + * Transform -- To an analogous color. | |
| 841 | + * | |
| 842 | + * Analogous colors are those adjacent on the color wheel, separated by 30°. | |
| 843 | + * | |
| 844 | + * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 845 | + * | |
| 846 | + * @return $this | |
| 847 | + */ | |
| 848 | + public function getAnalog( $step = 1 ) { | |
| 849 | + $incr = $step * 30; | |
| 850 | + return $this->incrementHue( $incr ); | |
| 794 | 851 | } |
| 795 | - return $this->fromHsl( $h, $s, $l ); | |
| 796 | - } | |
| 797 | 852 | |
| 798 | - /** | |
| 799 | - * Transform -- To grayscale. | |
| 800 | - * | |
| 801 | - * @return $this | |
| 802 | - */ | |
| 803 | - public function toGrayscale() { | |
| 804 | - $hsl = $this->toHsl(); | |
| 853 | + /** | |
| 854 | + * Transform -- To a tetradic (rectangular) color. | |
| 855 | + * | |
| 856 | + * A rectangular color scheme uses a color, its complement, and the colors 60° from each. | |
| 857 | + * This transforms the color to its 60° "tetrad". | |
| 858 | + * | |
| 859 | + * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 860 | + * | |
| 861 | + * @return $this | |
| 862 | + */ | |
| 863 | + public function getTetrad( $step = 1 ) { | |
| 864 | + $incr = $step * 60; | |
| 865 | + return $this->incrementHue( $incr ); | |
| 866 | + } | |
| 805 | 867 | |
| 806 | - $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 807 | - $s = 0; | |
| 808 | - $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 868 | + /** | |
| 869 | + * Transform -- To a triadic color. | |
| 870 | + * | |
| 871 | + * A triadic color scheme uses three colors evenly spaced (120°) around the color wheel. | |
| 872 | + * This transforms the color to one of its triadic colors. | |
| 873 | + * | |
| 874 | + * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 875 | + * | |
| 876 | + * @return $this | |
| 877 | + */ | |
| 878 | + public function getTriad( $step = 1 ) { | |
| 879 | + $incr = $step * 120; | |
| 880 | + return $this->incrementHue( $incr ); | |
| 881 | + } | |
| 809 | 882 | |
| 810 | - return $this->fromHsl( $h, $s, $l ); | |
| 811 | - } | |
| 883 | + /** | |
| 884 | + * Transform -- Increment hue. | |
| 885 | + * | |
| 886 | + * @param int $amount Amount. | |
| 887 | + * | |
| 888 | + * @return $this | |
| 889 | + */ | |
| 890 | + public function incrementHue( $amount ) { | |
| 891 | + $hsl = $this->toHsl(); | |
| 812 | 892 | |
| 813 | - /** | |
| 814 | - * Transform -- To the complementary color. | |
| 815 | - * | |
| 816 | - * The complement is the color on the opposite side of the color wheel, 180° away. | |
| 817 | - * | |
| 818 | - * @return $this | |
| 819 | - */ | |
| 820 | - public function getComplement() { | |
| 821 | - return $this->incrementHue( 180 ); | |
| 822 | - } | |
| 893 | + $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 894 | + $s = isset( $hsl['s'] ) ? $hsl['s'] : 0; | |
| 895 | + $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 823 | 896 | |
| 824 | - /** | |
| 825 | - * Transform -- To an analogous color of the complement. | |
| 826 | - * | |
| 827 | - * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 828 | - * | |
| 829 | - * @return $this | |
| 830 | - */ | |
| 831 | - public function getSplitComplement( $step = 1 ) { | |
| 832 | - $incr = 180 + ( $step * 30 ); | |
| 833 | - return $this->incrementHue( $incr ); | |
| 834 | - } | |
| 835 | - | |
| 836 | - /** | |
| 837 | - * Transform -- To an analogous color. | |
| 838 | - * | |
| 839 | - * Analogous colors are those adjacent on the color wheel, separated by 30°. | |
| 840 | - * | |
| 841 | - * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 842 | - * | |
| 843 | - * @return $this | |
| 844 | - */ | |
| 845 | - public function getAnalog( $step = 1 ) { | |
| 846 | - $incr = $step * 30; | |
| 847 | - return $this->incrementHue( $incr ); | |
| 848 | - } | |
| 849 | - | |
| 850 | - /** | |
| 851 | - * Transform -- To a tetradic (rectangular) color. | |
| 852 | - * | |
| 853 | - * A rectangular color scheme uses a color, its complement, and the colors 60° from each. | |
| 854 | - * This transforms the color to its 60° "tetrad". | |
| 855 | - * | |
| 856 | - * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 857 | - * | |
| 858 | - * @return $this | |
| 859 | - */ | |
| 860 | - public function getTetrad( $step = 1 ) { | |
| 861 | - $incr = $step * 60; | |
| 862 | - return $this->incrementHue( $incr ); | |
| 863 | - } | |
| 864 | - | |
| 865 | - /** | |
| 866 | - * Transform -- To a triadic color. | |
| 867 | - * | |
| 868 | - * A triadic color scheme uses three colors evenly spaced (120°) around the color wheel. | |
| 869 | - * This transforms the color to one of its triadic colors. | |
| 870 | - * | |
| 871 | - * @param int $step Pass `1` or `-1` to choose which direction around the color wheel. | |
| 872 | - * | |
| 873 | - * @return $this | |
| 874 | - */ | |
| 875 | - public function getTriad( $step = 1 ) { | |
| 876 | - $incr = $step * 120; | |
| 877 | - return $this->incrementHue( $incr ); | |
| 878 | - } | |
| 879 | - | |
| 880 | - /** | |
| 881 | - * Transform -- Increment hue. | |
| 882 | - * | |
| 883 | - * @param int $amount Amount. | |
| 884 | - * | |
| 885 | - * @return $this | |
| 886 | - */ | |
| 887 | - public function incrementHue( $amount ) { | |
| 888 | - $hsl = $this->toHsl(); | |
| 889 | - | |
| 890 | - $h = isset( $hsl['h'] ) ? $hsl['h'] : 0; | |
| 891 | - $s = isset( $hsl['s'] ) ? $hsl['s'] : 0; | |
| 892 | - $l = isset( $hsl['l'] ) ? $hsl['l'] : 0; | |
| 893 | - | |
| 894 | - $h = ( $h + $amount ) % 360; | |
| 895 | - if ( $h < 0 ) { | |
| 896 | - $h += 360; | |
| 897 | + $h = ( $h + $amount ) % 360; | |
| 898 | + if ( $h < 0 ) { | |
| 899 | + $h += 360; | |
| 900 | + } | |
| 901 | + return $this->fromHsl( $h, $s, $l ); | |
| 897 | 902 | } |
| 898 | - return $this->fromHsl( $h, $s, $l ); | |
| 899 | 903 | } |
| 900 | 904 | } |
