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| 1 | <?php declare(strict_types=1); |
| 2 | /* |
| 3 | * This file is part of Aplus Framework Image Library. |
| 4 | * |
| 5 | * (c) Natan Felles <natanfelles@gmail.com> |
| 6 | * |
| 7 | * For the full copyright and license information, please view the LICENSE |
| 8 | * file that was distributed with this source code. |
| 9 | */ |
| 10 | namespace Framework\Image; |
| 11 | |
| 12 | use GdImage; |
| 13 | use InvalidArgumentException; |
| 14 | use JetBrains\PhpStorm\ArrayShape; |
| 15 | use JetBrains\PhpStorm\Pure; |
| 16 | use LogicException; |
| 17 | use RuntimeException; |
| 18 | |
| 19 | /** |
| 20 | * Class Image. |
| 21 | * |
| 22 | * @package image |
| 23 | */ |
| 24 | class Image implements \JsonSerializable, \Stringable |
| 25 | { |
| 26 | /** |
| 27 | * Path to the image file. |
| 28 | */ |
| 29 | protected string $filename; |
| 30 | /** |
| 31 | * Image type. One of IMAGETYPE_* constants. |
| 32 | */ |
| 33 | protected int $type; |
| 34 | /** |
| 35 | * MIME type. |
| 36 | */ |
| 37 | protected string $mime; |
| 38 | /** |
| 39 | * GdImage instance. |
| 40 | */ |
| 41 | protected GdImage $instance; |
| 42 | /** |
| 43 | * The image quality/compression level. |
| 44 | * |
| 45 | * 0 to 9 on PNG, default is 6. 0 to 100 on JPEG, default is 75. |
| 46 | * Null to update to the default when getQuality is called. |
| 47 | * |
| 48 | * @see Image::getQuality() |
| 49 | */ |
| 50 | protected ?int $quality = null; |
| 51 | |
| 52 | /** |
| 53 | * Image constructor. |
| 54 | * |
| 55 | * @param string $filename Path to the image file. |
| 56 | * Acceptable types are: GIF, JPEG and PNG |
| 57 | * |
| 58 | * @throws InvalidArgumentException for invalid file |
| 59 | * @throws RuntimeException for unsupported image type of could not get image info |
| 60 | */ |
| 61 | public function __construct(string $filename) |
| 62 | { |
| 63 | $realpath = \realpath($filename); |
| 64 | if ($realpath === false || ! \is_file($realpath) || ! \is_readable($realpath)) { |
| 65 | throw new InvalidArgumentException('File does not exists or is not readable: ' . $filename); |
| 66 | } |
| 67 | $this->filename = $realpath; |
| 68 | $info = \getimagesize($this->filename); |
| 69 | if ($info === false) { |
| 70 | throw new RuntimeException( |
| 71 | 'Could not get image info from the given filename: ' . $this->filename |
| 72 | ); |
| 73 | } |
| 74 | if ( ! (\imagetypes() & $info[2])) { |
| 75 | throw new RuntimeException('Unsupported image type: ' . $info[2]); |
| 76 | } |
| 77 | $this->type = $info[2]; |
| 78 | $this->mime = $info['mime']; |
| 79 | $instance = match ($this->type) { |
| 80 | \IMAGETYPE_PNG => \imagecreatefrompng($this->filename), |
| 81 | \IMAGETYPE_JPEG => \imagecreatefromjpeg($this->filename), |
| 82 | \IMAGETYPE_GIF => \imagecreatefromgif($this->filename), |
| 83 | default => throw new RuntimeException('Image type is not acceptable: ' . $this->type), |
| 84 | }; |
| 85 | if ( ! $instance instanceof GdImage) { |
| 86 | throw new RuntimeException( |
| 87 | "Image of type '{$this->type}' does not returned a GdImage instance" |
| 88 | ); |
| 89 | } |
| 90 | $this->instance = $instance; |
| 91 | } |
| 92 | |
| 93 | public function __destruct() |
| 94 | { |
| 95 | $this->destroy(); |
| 96 | } |
| 97 | |
| 98 | public function __toString() : string |
| 99 | { |
| 100 | return $this->getDataUrl(); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Destroys the GdImage instance. |
| 105 | * |
| 106 | * @return bool |
| 107 | */ |
| 108 | public function destroy() : bool |
| 109 | { |
| 110 | return \imagedestroy($this->instance); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Gets the GdImage instance. |
| 115 | * |
| 116 | * @return GdImage GdImage instance |
| 117 | */ |
| 118 | #[Pure] |
| 119 | public function getInstance() : GdImage |
| 120 | { |
| 121 | return $this->instance; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Sets the GdImage instance. |
| 126 | * |
| 127 | * @param GdImage $instance GdImage instance |
| 128 | * |
| 129 | * @return static |
| 130 | */ |
| 131 | public function setInstance(GdImage $instance) : static |
| 132 | { |
| 133 | $this->instance = $instance; |
| 134 | return $this; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Gets the image quality/compression level. |
| 139 | * |
| 140 | * @return int|null An integer for PNG and JPEG types or null for GIF |
| 141 | */ |
| 142 | public function getQuality() : ?int |
| 143 | { |
| 144 | if ($this->quality === null) { |
| 145 | if ($this->type === \IMAGETYPE_PNG) { |
| 146 | $this->quality = 6; |
| 147 | } elseif ($this->type === \IMAGETYPE_JPEG) { |
| 148 | $this->quality = 75; |
| 149 | } |
| 150 | } |
| 151 | return $this->quality; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Sets the image quality/compression level. |
| 156 | * |
| 157 | * @param int $quality The quality/compression level |
| 158 | * |
| 159 | * @throws LogicException when trying to set a quality value for a GIF image |
| 160 | * @throws InvalidArgumentException if the image type is PNG and the value |
| 161 | * is not between 0 and 9 or if the image type is JPEG and the value is not |
| 162 | * between 0 and 100 |
| 163 | * |
| 164 | * @return static |
| 165 | */ |
| 166 | public function setQuality(int $quality) : static |
| 167 | { |
| 168 | if ($this->type === \IMAGETYPE_GIF) { |
| 169 | throw new LogicException( |
| 170 | 'GIF images does not receive a quality value' |
| 171 | ); |
| 172 | } |
| 173 | if ($this->type === \IMAGETYPE_PNG && ($quality < 0 || $quality > 9)) { |
| 174 | throw new InvalidArgumentException( |
| 175 | 'PNG images must receive a quality value between 0 and 9, ' . $quality . ' given' |
| 176 | ); |
| 177 | } |
| 178 | if ($this->type === \IMAGETYPE_JPEG && ($quality < 0 || $quality > 100)) { |
| 179 | throw new InvalidArgumentException( |
| 180 | 'JPEG images must receive a quality value between 0 and 100, ' . $quality . ' given' |
| 181 | ); |
| 182 | } |
| 183 | $this->quality = $quality; |
| 184 | return $this; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Gets the image resolution. |
| 189 | * |
| 190 | * @throws RuntimeException for image could not get resolution |
| 191 | * |
| 192 | * @return array<string,int> Returns an array containing two keys, horizontal and |
| 193 | * vertical, with integers as values |
| 194 | */ |
| 195 | #[ArrayShape(['horizontal' => 'int', 'vertical' => 'int'])] |
| 196 | public function getResolution() : array |
| 197 | { |
| 198 | $resolution = \imageresolution($this->instance); |
| 199 | if ($resolution === false) { |
| 200 | throw new RuntimeException('Image could not to get resolution'); |
| 201 | } |
| 202 | return [ |
| 203 | 'horizontal' => $resolution[0], // @phpstan-ignore-line |
| 204 | // @phpstan-ignore-next-line |
| 205 | 'vertical' => $resolution[1], |
| 206 | ]; |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Sets the image resolution. |
| 211 | * |
| 212 | * @param int $horizontal The horizontal resolution in DPI |
| 213 | * @param int $vertical The vertical resolution in DPI |
| 214 | * |
| 215 | * @throws RuntimeException for image could not to set resolution |
| 216 | * |
| 217 | * @return static |
| 218 | */ |
| 219 | public function setResolution(int $horizontal = 96, int $vertical = 96) : static |
| 220 | { |
| 221 | $set = \imageresolution($this->instance, $horizontal, $vertical); |
| 222 | if ($set === false) { |
| 223 | throw new RuntimeException('Image could not to set resolution'); |
| 224 | } |
| 225 | return $this; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Gets the image height. |
| 230 | * |
| 231 | * @return int |
| 232 | */ |
| 233 | #[Pure] |
| 234 | public function getHeight() : int |
| 235 | { |
| 236 | return \imagesy($this->instance); |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Gets the image width. |
| 241 | * |
| 242 | * @return int |
| 243 | */ |
| 244 | #[Pure] |
| 245 | public function getWidth() : int |
| 246 | { |
| 247 | return \imagesx($this->instance); |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Gets the file extension for image type. |
| 252 | * |
| 253 | * @return false|string a string with the extension corresponding to the |
| 254 | * given image type or false on fail |
| 255 | */ |
| 256 | #[Pure] |
| 257 | public function getExtension() : string | false |
| 258 | { |
| 259 | return \image_type_to_extension($this->type); |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * Gets the image MIME type. |
| 264 | * |
| 265 | * @return string |
| 266 | */ |
| 267 | #[Pure] |
| 268 | public function getMime() : string |
| 269 | { |
| 270 | return $this->mime; |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * Saves the image contents to a given filename. |
| 275 | * |
| 276 | * @param string|null $filename Optional filename or null to use the original |
| 277 | * |
| 278 | * @return bool |
| 279 | */ |
| 280 | public function save(string $filename = null) : bool |
| 281 | { |
| 282 | $filename ??= $this->filename; |
| 283 | return match ($this->type) { |
| 284 | \IMAGETYPE_PNG => \imagepng($this->instance, $filename, $this->getQuality()), |
| 285 | \IMAGETYPE_JPEG => \imagejpeg($this->instance, $filename, $this->getQuality()), |
| 286 | \IMAGETYPE_GIF => \imagegif($this->instance, $filename), |
| 287 | default => false, |
| 288 | }; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Sends the image contents to the output buffer. |
| 293 | * |
| 294 | * @return bool |
| 295 | */ |
| 296 | public function send() : bool |
| 297 | { |
| 298 | if (\in_array($this->type, [\IMAGETYPE_PNG, \IMAGETYPE_GIF], true)) { |
| 299 | \imagesavealpha($this->instance, true); |
| 300 | } |
| 301 | return match ($this->type) { |
| 302 | \IMAGETYPE_PNG => \imagepng($this->instance, null, $this->getQuality()), |
| 303 | \IMAGETYPE_JPEG => \imagejpeg($this->instance, null, $this->getQuality()), |
| 304 | \IMAGETYPE_GIF => \imagegif($this->instance), |
| 305 | default => false, |
| 306 | }; |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * Renders the image contents. |
| 311 | * |
| 312 | * @throws RuntimeException for image could not be rendered |
| 313 | * |
| 314 | * @return string The image contents |
| 315 | */ |
| 316 | public function render() : string |
| 317 | { |
| 318 | \ob_start(); |
| 319 | $status = $this->send(); |
| 320 | $contents = \ob_get_clean(); |
| 321 | if ($status === false || $contents === false) { |
| 322 | throw new RuntimeException('Image could not be rendered'); |
| 323 | } |
| 324 | return $contents; |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * Crops the image. |
| 329 | * |
| 330 | * @param int $width Width in pixels |
| 331 | * @param int $height Height in pixels |
| 332 | * @param int $marginLeft Margin left in pixels |
| 333 | * @param int $marginTop Margin top in pixels |
| 334 | * |
| 335 | * @throws RuntimeException for image could not to crop |
| 336 | * |
| 337 | * @return static |
| 338 | */ |
| 339 | public function crop(int $width, int $height, int $marginLeft = 0, int $marginTop = 0) : static |
| 340 | { |
| 341 | $crop = \imagecrop($this->instance, [ |
| 342 | 'x' => $marginLeft, |
| 343 | 'y' => $marginTop, |
| 344 | 'width' => $width, |
| 345 | 'height' => $height, |
| 346 | ]); |
| 347 | if ($crop === false) { |
| 348 | throw new RuntimeException('Image could not to crop'); |
| 349 | } |
| 350 | $this->instance = $crop; |
| 351 | return $this; |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * Flips the image. |
| 356 | * |
| 357 | * @param string $direction Allowed values are: h or horizontal. v or vertical. b or both. |
| 358 | * |
| 359 | * @throws InvalidArgumentException for invalid image flip direction |
| 360 | * @throws RuntimeException for image could not to flip |
| 361 | * |
| 362 | * @return static |
| 363 | */ |
| 364 | public function flip(string $direction = 'horizontal') : static |
| 365 | { |
| 366 | $direction = match ($direction) { |
| 367 | 'h', 'horizontal' => \IMG_FLIP_HORIZONTAL, |
| 368 | 'v', 'vertical' => \IMG_FLIP_VERTICAL, |
| 369 | 'b', 'both' => \IMG_FLIP_BOTH, |
| 370 | default => throw new InvalidArgumentException('Invalid image flip direction: ' . $direction), |
| 371 | }; |
| 372 | $flip = \imageflip($this->instance, $direction); |
| 373 | if ($flip === false) { |
| 374 | throw new RuntimeException('Image could not to flip'); |
| 375 | } |
| 376 | return $this; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Applies a filter to the image. |
| 381 | * |
| 382 | * @param int $type IMG_FILTER_* constants |
| 383 | * @param int ...$arguments Arguments for the filter type |
| 384 | * |
| 385 | * @see https://www.php.net/manual/en/function.imagefilter.php |
| 386 | * |
| 387 | * @throws RuntimeException for image could not apply the filter |
| 388 | * |
| 389 | * @return static |
| 390 | */ |
| 391 | public function filter(int $type, int ...$arguments) : static |
| 392 | { |
| 393 | $filtered = \imagefilter($this->instance, $type, ...$arguments); |
| 394 | if ($filtered === false) { |
| 395 | throw new RuntimeException('Image could not apply the filter'); |
| 396 | } |
| 397 | return $this; |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * Flattens the image. |
| 402 | * |
| 403 | * Replaces transparency with an RGB color. |
| 404 | * |
| 405 | * @param int $red |
| 406 | * @param int $green |
| 407 | * @param int $blue |
| 408 | * |
| 409 | * @throws RuntimeException for could not create a true color image, could |
| 410 | * not allocate a color or image could not to flatten |
| 411 | * |
| 412 | * @return static |
| 413 | */ |
| 414 | public function flatten(int $red = 255, int $green = 255, int $blue = 255) : static |
| 415 | { |
| 416 | \imagesavealpha($this->instance, false); |
| 417 | $image = \imagecreatetruecolor($this->getWidth(), $this->getHeight()); |
| 418 | if ($image === false) { |
| 419 | throw new RuntimeException('Could not create a true color image'); |
| 420 | } |
| 421 | $color = \imagecolorallocate($image, $red, $green, $blue); |
| 422 | if ($color === false) { |
| 423 | throw new RuntimeException('Image could not allocate a color'); |
| 424 | } |
| 425 | \imagefilledrectangle( |
| 426 | $image, |
| 427 | 0, |
| 428 | 0, |
| 429 | $this->getWidth(), |
| 430 | $this->getHeight(), |
| 431 | $color |
| 432 | ); |
| 433 | $copied = \imagecopy( |
| 434 | $image, |
| 435 | $this->instance, |
| 436 | 0, |
| 437 | 0, |
| 438 | 0, |
| 439 | 0, |
| 440 | $this->getWidth(), |
| 441 | $this->getHeight() |
| 442 | ); |
| 443 | if ($copied === false) { |
| 444 | throw new RuntimeException('Image could not to flatten'); |
| 445 | } |
| 446 | $this->instance = $image; |
| 447 | return $this; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Sets the image opacity level. |
| 452 | * |
| 453 | * @param int $opacity Opacity percentage: from 0 to 100 |
| 454 | * |
| 455 | * @return static |
| 456 | */ |
| 457 | public function opacity(int $opacity = 100) : static |
| 458 | { |
| 459 | if ($opacity < 0 || $opacity > 100) { |
| 460 | throw new InvalidArgumentException( |
| 461 | 'Opacity percentage must be between 0 and 100, ' . $opacity . ' given' |
| 462 | ); |
| 463 | } |
| 464 | if ($opacity === 100) { |
| 465 | \imagealphablending($this->instance, true); |
| 466 | return $this; |
| 467 | } |
| 468 | $opacity = (int) \round(\abs(($opacity * 127 / 100) - 127)); |
| 469 | \imagelayereffect($this->instance, \IMG_EFFECT_OVERLAY); |
| 470 | $color = \imagecolorallocatealpha($this->instance, 127, 127, 127, $opacity); |
| 471 | if ($color === false) { |
| 472 | throw new RuntimeException('Image could not allocate a color'); |
| 473 | } |
| 474 | \imagefilledrectangle( |
| 475 | $this->instance, |
| 476 | 0, |
| 477 | 0, |
| 478 | $this->getWidth(), |
| 479 | $this->getHeight(), |
| 480 | $color |
| 481 | ); |
| 482 | \imagesavealpha($this->instance, true); |
| 483 | \imagealphablending($this->instance, false); |
| 484 | return $this; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * Rotates the image with a given angle. |
| 489 | * |
| 490 | * @param float $angle Rotation angle, in degrees. Clockwise direction. |
| 491 | * |
| 492 | * @throws RuntimeException for image could not allocate a color or could not rotate |
| 493 | * |
| 494 | * @return static |
| 495 | */ |
| 496 | public function rotate(float $angle) : static |
| 497 | { |
| 498 | if (\in_array($this->type, [\IMAGETYPE_PNG, \IMAGETYPE_GIF], true)) { |
| 499 | \imagealphablending($this->instance, false); |
| 500 | \imagesavealpha($this->instance, true); |
| 501 | $background = \imagecolorallocatealpha($this->instance, 0, 0, 0, 127); |
| 502 | } else { |
| 503 | $background = \imagecolorallocate($this->instance, 255, 255, 255); |
| 504 | } |
| 505 | if ($background === false) { |
| 506 | throw new RuntimeException('Image could not allocate a color'); |
| 507 | } |
| 508 | $rotate = \imagerotate($this->instance, -1 * $angle, $background); |
| 509 | if ($rotate === false) { |
| 510 | throw new RuntimeException('Image could not to rotate'); |
| 511 | } |
| 512 | $this->instance = $rotate; |
| 513 | return $this; |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * Scales the image. |
| 518 | * |
| 519 | * @param int $width Width in pixels |
| 520 | * @param int $height Height in pixels. Use -1 to use a proportional height |
| 521 | * based on the width. |
| 522 | * |
| 523 | * @throws RuntimeException for image could not to scale |
| 524 | * |
| 525 | * @return static |
| 526 | */ |
| 527 | public function scale(int $width, int $height = -1) : static |
| 528 | { |
| 529 | $scale = \imagescale($this->instance, $width, $height); |
| 530 | if ($scale === false) { |
| 531 | throw new RuntimeException('Image could not to scale'); |
| 532 | } |
| 533 | $this->instance = $scale; |
| 534 | return $this; |
| 535 | } |
| 536 | |
| 537 | /** |
| 538 | * Adds a watermark to the image. |
| 539 | * |
| 540 | * @param Image $watermark The image to use as watermark |
| 541 | * @param int $horizontalPosition Horizontal position |
| 542 | * @param int $verticalPosition Vertical position |
| 543 | * |
| 544 | * @throws RuntimeException for image could not to create watermark |
| 545 | * |
| 546 | * @return static |
| 547 | */ |
| 548 | public function watermark( |
| 549 | Image $watermark, |
| 550 | int $horizontalPosition = 0, |
| 551 | int $verticalPosition = 0 |
| 552 | ) : static { |
| 553 | if ($horizontalPosition < 0) { |
| 554 | $horizontalPosition = $this->getWidth() |
| 555 | - (-1 * $horizontalPosition + $watermark->getWidth()); |
| 556 | } |
| 557 | if ($verticalPosition < 0) { |
| 558 | $verticalPosition = $this->getHeight() |
| 559 | - (-1 * $verticalPosition + $watermark->getHeight()); |
| 560 | } |
| 561 | $copied = \imagecopy( |
| 562 | $this->instance, |
| 563 | $watermark->getInstance(), |
| 564 | $horizontalPosition, |
| 565 | $verticalPosition, |
| 566 | 0, |
| 567 | 0, |
| 568 | $watermark->getWidth(), |
| 569 | $watermark->getHeight() |
| 570 | ); |
| 571 | if ($copied === false) { |
| 572 | throw new RuntimeException('Image could not to create watermark'); |
| 573 | } |
| 574 | return $this; |
| 575 | } |
| 576 | |
| 577 | /** |
| 578 | * Allow embed the image contents in a document. |
| 579 | * |
| 580 | * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs |
| 581 | * @see https://datatracker.ietf.org/doc/html/rfc2397 |
| 582 | * |
| 583 | * @return string The image "data" URL |
| 584 | */ |
| 585 | public function getDataUrl() : string |
| 586 | { |
| 587 | return 'data:' . $this->getMime() . ';base64,' . \base64_encode($this->render()); |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * @return string |
| 592 | */ |
| 593 | public function jsonSerialize() : string |
| 594 | { |
| 595 | return $this->getDataUrl(); |
| 596 | } |
| 597 | |
| 598 | /** |
| 599 | * Indicates if a given filename has an acceptable image type. |
| 600 | * |
| 601 | * @param string $filename |
| 602 | * |
| 603 | * @return bool |
| 604 | */ |
| 605 | public static function isAcceptable(string $filename) : bool |
| 606 | { |
| 607 | $filename = \realpath($filename); |
| 608 | if ($filename === false || ! \is_file($filename) || ! \is_readable($filename)) { |
| 609 | return false; |
| 610 | } |
| 611 | $info = \getimagesize($filename); |
| 612 | if ($info === false) { |
| 613 | return false; |
| 614 | } |
| 615 | return match ($info[2]) { |
| 616 | \IMAGETYPE_PNG, \IMAGETYPE_JPEG, \IMAGETYPE_GIF => true, |
| 617 | default => false, |
| 618 | }; |
| 619 | } |
| 620 | } |