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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (https://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@noladev.com> |
| 7 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. |
| 8 | * @license https://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Color\Color; |
| 15 | |
| 16 | use OutOfRangeException; |
| 17 | |
| 18 | /** |
| 19 | * Pop Color RGB color class |
| 20 | * |
| 21 | * @category Pop |
| 22 | * @package Pop\Color |
| 23 | * @author Nick Sagona, III <dev@noladev.com> |
| 24 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. |
| 25 | * @license https://www.popphp.org/license New BSD License |
| 26 | * @version 1.0.2 |
| 27 | */ |
| 28 | class Rgb extends AbstractColor implements \ArrayAccess |
| 29 | { |
| 30 | |
| 31 | /** |
| 32 | * R value |
| 33 | * @var int |
| 34 | */ |
| 35 | protected int $r = 0; |
| 36 | |
| 37 | /** |
| 38 | * G value |
| 39 | * @var int |
| 40 | */ |
| 41 | protected int $g = 0; |
| 42 | |
| 43 | /** |
| 44 | * B value |
| 45 | * @var int |
| 46 | */ |
| 47 | protected int $b = 0; |
| 48 | |
| 49 | /** |
| 50 | * Alpha value |
| 51 | * @var ?float |
| 52 | */ |
| 53 | protected ?float $a = null; |
| 54 | |
| 55 | /** |
| 56 | * Constructor |
| 57 | * |
| 58 | * Instantiate the CSS RGB color object |
| 59 | * |
| 60 | * @param int|string $r |
| 61 | * @param int|string $g |
| 62 | * @param int|string $b |
| 63 | * @param float|string|null $a |
| 64 | */ |
| 65 | public function __construct(int|string $r, int|string $g, int|string $b, float|string|null $a = null) |
| 66 | { |
| 67 | $this->setR($r); |
| 68 | $this->setG($g); |
| 69 | $this->setB($b); |
| 70 | if ($a !== null) { |
| 71 | $this->setA($a); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Set R value |
| 77 | * |
| 78 | * @param int|string $r |
| 79 | * @throws OutOfRangeException |
| 80 | * @return self |
| 81 | */ |
| 82 | public function setR(int|string $r): self |
| 83 | { |
| 84 | $r = (int)$r; |
| 85 | if (($r > 255) || ($r < 0)) { |
| 86 | throw new OutOfRangeException('Error: The value of $r must be between 0 and 255.'); |
| 87 | } |
| 88 | $this->r = $r; |
| 89 | return $this; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Set G value |
| 94 | * |
| 95 | * @param int|string $g |
| 96 | * @throws OutOfRangeException |
| 97 | * @return self |
| 98 | */ |
| 99 | public function setG(int|string $g): self |
| 100 | { |
| 101 | $g = (int)$g; |
| 102 | if (($g > 255) || ($g < 0)) { |
| 103 | throw new OutOfRangeException('Error: The value of $g must be between 0 and 255.'); |
| 104 | } |
| 105 | $this->g = $g; |
| 106 | return $this; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Set B value |
| 111 | * |
| 112 | * @param int|string $b |
| 113 | * @throws OutOfRangeException |
| 114 | * @return self |
| 115 | */ |
| 116 | public function setB(int|string $b): self |
| 117 | { |
| 118 | $b = (int)$b; |
| 119 | if (($b > 255) || ($b < 0)) { |
| 120 | throw new OutOfRangeException('Error: The value of $b must be between 0 and 255.'); |
| 121 | } |
| 122 | $this->b = $b; |
| 123 | return $this; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Set A value |
| 128 | * |
| 129 | * @param float|string $a |
| 130 | * @throws OutOfRangeException |
| 131 | * @return self |
| 132 | */ |
| 133 | public function setA(float|string $a): self |
| 134 | { |
| 135 | $a = (float)$a; |
| 136 | if (($a > 1) || ($a < 0)) { |
| 137 | throw new OutOfRangeException('Error: The value of $l must be between 0 and 1.'); |
| 138 | } |
| 139 | $this->a = $a; |
| 140 | return $this; |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Get R value |
| 145 | * |
| 146 | * @return int |
| 147 | */ |
| 148 | public function getR(): int |
| 149 | { |
| 150 | return $this->r; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Get G value |
| 155 | * |
| 156 | * @return int |
| 157 | */ |
| 158 | public function getG(): int |
| 159 | { |
| 160 | return $this->g; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Get B value |
| 165 | * |
| 166 | * @return int |
| 167 | */ |
| 168 | public function getB(): int |
| 169 | { |
| 170 | return $this->b; |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Get A value |
| 175 | * |
| 176 | * @return float|null |
| 177 | */ |
| 178 | public function getA(): float|null |
| 179 | { |
| 180 | return $this->a; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * Determine if the color object has an alpha value |
| 185 | * |
| 186 | * @return bool |
| 187 | */ |
| 188 | public function hasA(): bool |
| 189 | { |
| 190 | return ($this->a !== null); |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Determine if the color object has an alpha value (alias) |
| 195 | * |
| 196 | * @return bool |
| 197 | */ |
| 198 | public function hasAlpha(): bool |
| 199 | { |
| 200 | return ($this->a !== null); |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Convert to CMYK |
| 205 | * |
| 206 | * @return Cmyk |
| 207 | */ |
| 208 | public function toCmyk(): Cmyk |
| 209 | { |
| 210 | $K = 1; |
| 211 | |
| 212 | // Calculate CMY. |
| 213 | $cyan = 1 - ($this->r / 255); |
| 214 | $magenta = 1 - ($this->g / 255); |
| 215 | $yellow = 1 - ($this->b / 255); |
| 216 | |
| 217 | // Calculate K. |
| 218 | if ($cyan < $K) { |
| 219 | $K = $cyan; |
| 220 | } |
| 221 | if ($magenta < $K) { |
| 222 | $K = $magenta; |
| 223 | } |
| 224 | if ($yellow < $K) { |
| 225 | $K = $yellow; |
| 226 | } |
| 227 | |
| 228 | if ($K == 1) { |
| 229 | $cyan = 0; |
| 230 | $magenta = 0; |
| 231 | $yellow = 0; |
| 232 | } else { |
| 233 | $cyan = round((($cyan - $K) / (1 - $K)) * 100); |
| 234 | $magenta = round((($magenta - $K) / (1 - $K)) * 100); |
| 235 | $yellow = round((($yellow - $K) / (1 - $K)) * 100); |
| 236 | } |
| 237 | |
| 238 | $black = round($K * 100); |
| 239 | |
| 240 | return new Cmyk($cyan, $magenta, $yellow, $black); |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * Convert to Gray |
| 245 | * |
| 246 | * @return Grayscale |
| 247 | */ |
| 248 | public function toGray(): Grayscale |
| 249 | { |
| 250 | return new Grayscale(floor(((floor(($this->r + $this->g + $this->b) / 3) / 255) * 100))); |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * Convert to HSL |
| 255 | * |
| 256 | * @return Hsl |
| 257 | */ |
| 258 | public function toHsl(): Hsl |
| 259 | { |
| 260 | $r = $this->getR(); |
| 261 | $g = $this->getG(); |
| 262 | $b = $this->getB(); |
| 263 | |
| 264 | $min = min($r, min($g, $b)); |
| 265 | $max = max($r, max($g, $b)); |
| 266 | $delta = $max - $min; |
| 267 | $h = 0; |
| 268 | |
| 269 | if ($delta > 0) { |
| 270 | if ($max == $r && $max != $g) $h += ($g - $b) / $delta; |
| 271 | if ($max == $g && $max != $b) $h += (2 + ($b - $r) / $delta); |
| 272 | if ($max == $b && $max != $r) $h += (4 + ($r - $g) / $delta); |
| 273 | $h /= 6; |
| 274 | } |
| 275 | |
| 276 | // Calculate the saturation and brightness. |
| 277 | $r = $this->getR() / 255; |
| 278 | $g = $this->getG() / 255; |
| 279 | $b = $this->getB() / 255; |
| 280 | |
| 281 | $max = max($r, $g, $b); |
| 282 | $min = min($r, $g, $b); |
| 283 | |
| 284 | $l = $max; |
| 285 | $d = $max - $min; |
| 286 | $s = ($d == 0) ? 0 : $d / $max; |
| 287 | |
| 288 | return new Hsl(round($h * 360), round($s * 100), round($l * 100), $this->a); |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Convert to hex |
| 293 | * |
| 294 | * @return Hex |
| 295 | */ |
| 296 | public function toHex(): Hex |
| 297 | { |
| 298 | $hex = str_pad(dechex($this->r), 2, '0', STR_PAD_LEFT) . str_pad(dechex($this->g), 2, '0', STR_PAD_LEFT) . str_pad(dechex($this->b), 2, '0', STR_PAD_LEFT); |
| 299 | return new Hex($hex); |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * Convert to array |
| 304 | * |
| 305 | * @param bool $assoc |
| 306 | * @return array |
| 307 | */ |
| 308 | public function toArray(bool $assoc = true): array |
| 309 | { |
| 310 | $rgb = []; |
| 311 | |
| 312 | if ($assoc) { |
| 313 | $rgb['r'] = $this->r; |
| 314 | $rgb['g'] = $this->g; |
| 315 | $rgb['b'] = $this->b; |
| 316 | if ($this->a !== null) { |
| 317 | $rgb['a'] = $this->a; |
| 318 | } |
| 319 | } else { |
| 320 | $rgb[] = $this->r; |
| 321 | $rgb[] = $this->g; |
| 322 | $rgb[] = $this->b; |
| 323 | if ($this->a !== null) { |
| 324 | $rgb[] = $this->a; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | return $rgb; |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * Convert to readable string |
| 333 | * |
| 334 | * @param ?string $format |
| 335 | * @return string |
| 336 | */ |
| 337 | public function render(?string $format = null): string |
| 338 | { |
| 339 | if ($format == self::COMMA) { |
| 340 | return $this->r . ', ' . $this->g . ', ' . $this->b . (!empty($this->a) ? ', ' . $this->a : ''); |
| 341 | } else if ($format == self::CSS) { |
| 342 | return (($this->a !== null) ? 'rgba(' : 'rgb(') . implode(', ', $this->toArray()) . ')'; |
| 343 | } else if ($format == self::PERCENT) { |
| 344 | return round(($this->r / 255), 2) . ' ' . round(($this->g / 255), 2) . ' ' . round(($this->b / 255), 2); |
| 345 | } else { |
| 346 | return $this->r . ' ' . $this->g . ' ' . $this->b . (!empty($this->a) ? ' ' . $this->a : ''); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * Return CSS-formatted string |
| 352 | * |
| 353 | * @return string |
| 354 | */ |
| 355 | public function __toString(): string |
| 356 | { |
| 357 | return $this->render(self::CSS); |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Magic method to set the color value |
| 362 | * |
| 363 | * @param string $name |
| 364 | * @param mixed $value |
| 365 | * @throws Exception |
| 366 | * @return void |
| 367 | */ |
| 368 | public function __set(string $name, mixed $value): void |
| 369 | { |
| 370 | $this->offsetSet($name, $value); |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * Magic method to return the color value |
| 375 | * |
| 376 | * @param string $name |
| 377 | * @throws Exception |
| 378 | * @return mixed |
| 379 | */ |
| 380 | public function __get(string $name): mixed |
| 381 | { |
| 382 | return $this->offsetGet($name); |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * Magic method to return whether the color value exists |
| 387 | * |
| 388 | * @param string $name |
| 389 | * @return bool |
| 390 | */ |
| 391 | public function __isset(string $name): bool |
| 392 | { |
| 393 | return $this->offsetExists($name); |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Magic method to unset color value |
| 398 | * |
| 399 | * @param string $name |
| 400 | * @throws Exception |
| 401 | * @return void |
| 402 | */ |
| 403 | public function __unset(string $name): void |
| 404 | { |
| 405 | throw new Exception('You cannot unset the properties of this color object.'); |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * ArrayAccess offsetExists |
| 410 | * |
| 411 | * @param mixed $offset |
| 412 | * @return bool |
| 413 | */ |
| 414 | public function offsetExists(mixed $offset): bool |
| 415 | { |
| 416 | return (($offset == 'r') || ($offset == 'g') || ($offset == 'b') || ($offset == 'a')); |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * ArrayAccess offsetGet |
| 421 | * |
| 422 | * @param mixed $offset |
| 423 | * @throws Exception |
| 424 | * @return mixed |
| 425 | */ |
| 426 | public function offsetGet(mixed $offset): mixed |
| 427 | { |
| 428 | switch ($offset) { |
| 429 | case 'r': |
| 430 | return $this->getR(); |
| 431 | break; |
| 432 | case 'g': |
| 433 | return $this->getG(); |
| 434 | break; |
| 435 | case 'b': |
| 436 | return $this->getB(); |
| 437 | break; |
| 438 | case 'a': |
| 439 | return $this->getA(); |
| 440 | break; |
| 441 | default: |
| 442 | throw new Exception("Error: You can only use 'r', 'g', 'b' or 'a'."); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * ArrayAccess offsetSet |
| 448 | * |
| 449 | * @param mixed $offset |
| 450 | * @param mixed $value |
| 451 | * @throws Exception |
| 452 | * @return void |
| 453 | */ |
| 454 | public function offsetSet(mixed $offset, mixed $value): void |
| 455 | { |
| 456 | switch ($offset) { |
| 457 | case 'r': |
| 458 | $this->setR($value); |
| 459 | break; |
| 460 | case 'g': |
| 461 | $this->setG($value); |
| 462 | break; |
| 463 | case 'b': |
| 464 | $this->setB($value); |
| 465 | break; |
| 466 | case 'a': |
| 467 | $this->setA($value); |
| 468 | break; |
| 469 | default: |
| 470 | throw new Exception("Error: You can only use 'r', 'g', 'b' or 'a'."); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * ArrayAccess offsetUnset |
| 476 | * |
| 477 | * @param mixed $offset |
| 478 | * @throws Exception |
| 479 | * @return void |
| 480 | */ |
| 481 | public function offsetUnset(mixed $offset): void |
| 482 | { |
| 483 | throw new Exception('You cannot unset the properties of this color object.'); |
| 484 | } |
| 485 | |
| 486 | } |