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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (http://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@nolainteractive.com> |
| 7 | * @copyright Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
| 8 | * @license http://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Pdf\Build\Image; |
| 15 | |
| 16 | use Pop\Pdf\Build\PdfObject\StreamObject; |
| 17 | |
| 18 | /** |
| 19 | * Pdf image parser class |
| 20 | * |
| 21 | * @category Pop |
| 22 | * @package Pop\Pdf |
| 23 | * @author Nick Sagona, III <dev@nolainteractive.com> |
| 24 | * @copyright Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
| 25 | * @license http://www.popphp.org/license New BSD License |
| 26 | * @version 5.0.0 |
| 27 | */ |
| 28 | class Parser |
| 29 | { |
| 30 | |
| 31 | /** |
| 32 | * Image width |
| 33 | * @var int |
| 34 | */ |
| 35 | protected int $width = 0; |
| 36 | |
| 37 | /** |
| 38 | * Image height |
| 39 | * @var int |
| 40 | */ |
| 41 | protected int $height = 0; |
| 42 | |
| 43 | /** |
| 44 | * Image resize value |
| 45 | * @var ?array |
| 46 | */ |
| 47 | protected ?array $resize = null; |
| 48 | |
| 49 | /** |
| 50 | * Image mime |
| 51 | * @var ?string |
| 52 | */ |
| 53 | protected ?string $mime = null; |
| 54 | |
| 55 | /** |
| 56 | * Image color mode |
| 57 | * @var mixed |
| 58 | */ |
| 59 | protected mixed $colorMode = null; |
| 60 | |
| 61 | /** |
| 62 | * Number of channels in the image |
| 63 | * @var ?int |
| 64 | */ |
| 65 | protected ?int $channels = null; |
| 66 | |
| 67 | /** |
| 68 | * Image bit-depth |
| 69 | * @var int |
| 70 | */ |
| 71 | protected int $depth = 0; |
| 72 | |
| 73 | /** |
| 74 | * Image basename |
| 75 | * @var ?string |
| 76 | */ |
| 77 | protected ?string $basename = null; |
| 78 | |
| 79 | /** |
| 80 | * Image filename |
| 81 | * @var ?string |
| 82 | */ |
| 83 | protected ?string $filename = null; |
| 84 | |
| 85 | /** |
| 86 | * Image extension |
| 87 | * @var ?string |
| 88 | */ |
| 89 | protected ?string $extension = null; |
| 90 | |
| 91 | /** |
| 92 | * Image fullpath |
| 93 | * @var ?string |
| 94 | */ |
| 95 | protected ?string $fullpath = null; |
| 96 | |
| 97 | /** |
| 98 | * Image stream |
| 99 | * @var ?string |
| 100 | */ |
| 101 | protected ?string $stream = null; |
| 102 | |
| 103 | /** |
| 104 | * Image total number of colors |
| 105 | * @var int |
| 106 | */ |
| 107 | protected int $colorTotal = 0; |
| 108 | |
| 109 | /** |
| 110 | * Flag for if the image has an alpha channel |
| 111 | * @var bool |
| 112 | */ |
| 113 | protected bool $alpha = false; |
| 114 | |
| 115 | /** |
| 116 | * Image data |
| 117 | * @var mixed |
| 118 | */ |
| 119 | protected mixed $imageData = null; |
| 120 | |
| 121 | /** |
| 122 | * Image data length |
| 123 | * @var ?int |
| 124 | */ |
| 125 | protected ?int$imageDataLength = null; |
| 126 | |
| 127 | /** |
| 128 | * GD image resource |
| 129 | * @var mixed |
| 130 | */ |
| 131 | protected mixed $resource = null; |
| 132 | |
| 133 | /** |
| 134 | * Image X Coordinate |
| 135 | * @var int |
| 136 | */ |
| 137 | protected int $x = 0; |
| 138 | |
| 139 | /** |
| 140 | * Image Y Coordinate |
| 141 | * @var int |
| 142 | */ |
| 143 | protected int $y = 0; |
| 144 | |
| 145 | /** |
| 146 | * Image object index |
| 147 | * @var ?int |
| 148 | */ |
| 149 | protected ?int $index = null; |
| 150 | |
| 151 | /** |
| 152 | * Image objects |
| 153 | * @var array |
| 154 | */ |
| 155 | protected array $objects = []; |
| 156 | |
| 157 | /** |
| 158 | * Converted GIF to PNG image |
| 159 | * @var ?string |
| 160 | */ |
| 161 | protected ?string $convertedImage = null; |
| 162 | |
| 163 | /** |
| 164 | * Resized image |
| 165 | * @var ?string |
| 166 | */ |
| 167 | protected ?string $resizedImage = null; |
| 168 | |
| 169 | /** |
| 170 | * Constructor |
| 171 | * |
| 172 | * Instantiate a image parser object |
| 173 | * |
| 174 | * @param int $x |
| 175 | * @param int $y |
| 176 | */ |
| 177 | public function __construct(int $x, int $y) |
| 178 | { |
| 179 | $this->setX($x); |
| 180 | $this->setY($y); |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * Create image from file |
| 185 | * |
| 186 | * @param string $imageFile |
| 187 | * @param int $x |
| 188 | * @param int $y |
| 189 | * @param ?array $resize |
| 190 | * @param bool $preserveResolution |
| 191 | * @return Parser |
| 192 | */ |
| 193 | public static function createImageFromFile( |
| 194 | string $imageFile, int $x, int $y, ?array $resize = null, bool $preserveResolution = false |
| 195 | ): Parser |
| 196 | { |
| 197 | $parser = new self($x, $y); |
| 198 | $parser->loadImageFromFile($imageFile, $resize, $preserveResolution); |
| 199 | return $parser; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Create image from stream |
| 204 | * |
| 205 | * @param string $imageStream |
| 206 | * @param int $x |
| 207 | * @param int $y |
| 208 | * @param ?array $resize |
| 209 | * @param bool $preserveResolution |
| 210 | * @return Parser |
| 211 | */ |
| 212 | public static function createImageFromStream( |
| 213 | string $imageStream, int $x, int $y, ?array $resize = null, bool $preserveResolution = false |
| 214 | ): Parser |
| 215 | { |
| 216 | $parser = new self($x, $y); |
| 217 | $parser->loadImageFromStream($imageStream, $resize, $preserveResolution); |
| 218 | return $parser; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Load image from file |
| 223 | * |
| 224 | * @param string $imageFile |
| 225 | * @param ?array $resize |
| 226 | * @param bool $preserveResolution |
| 227 | * @throws Exception |
| 228 | * @return Parser |
| 229 | */ |
| 230 | public function loadImageFromFile(string $imageFile, ?array $resize = null, bool $preserveResolution = false): Parser |
| 231 | { |
| 232 | $parts = pathinfo($imageFile); |
| 233 | $this->fullpath = realpath($imageFile); |
| 234 | $this->basename = $parts['basename']; |
| 235 | $this->filename = $parts['filename']; |
| 236 | $this->extension = (isset($parts['extension']) && ($parts['extension'] != '')) ? $parts['extension'] : null; |
| 237 | $this->stream = null; |
| 238 | |
| 239 | // Convert GIF image to PNG |
| 240 | if (strtolower($this->extension) == 'gif') { |
| 241 | $this->convertImage(); |
| 242 | } else { |
| 243 | $this->mime = (strtolower($this->extension) == 'png') ? 'image/png' : 'image/jpeg'; |
| 244 | } |
| 245 | |
| 246 | // If resize dimensions are passed |
| 247 | if (($resize !== null) && !($preserveResolution)) { |
| 248 | $this->resizeImage($resize); |
| 249 | } |
| 250 | |
| 251 | $imgSize = getimagesize($this->fullpath); |
| 252 | |
| 253 | if ($resize !== null) { |
| 254 | $this->resize = $resize; |
| 255 | } |
| 256 | |
| 257 | $this->width = $imgSize[0]; |
| 258 | $this->height = $imgSize[1]; |
| 259 | $this->channels = (isset($imgSize['channels'])) ? $imgSize['channels'] : null; |
| 260 | $this->depth = (isset($imgSize['bits'])) ? $imgSize['bits'] : null; |
| 261 | |
| 262 | $this->imageData = file_get_contents($this->fullpath); |
| 263 | $this->imageDataLength = strlen($this->imageData); |
| 264 | |
| 265 | $this->parseImageData(); |
| 266 | |
| 267 | return $this; |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Load image from stream |
| 272 | * |
| 273 | * @param string $imageStream |
| 274 | * @param ?array $resize |
| 275 | * @param bool $preserveResolution |
| 276 | * @throws Exception |
| 277 | * @return Parser |
| 278 | */ |
| 279 | public function loadImageFromStream(string $imageStream, ?array $resize = null, bool $preserveResolution = false): Parser |
| 280 | { |
| 281 | $this->stream = $imageStream; |
| 282 | $imgSize = getimagesizefromstring($this->stream); |
| 283 | |
| 284 | $this->fullpath = null; |
| 285 | |
| 286 | switch ($imgSize['mime']) { |
| 287 | case 'image/jpeg': |
| 288 | $this->basename = 'image.jpg'; |
| 289 | $this->filename = 'image'; |
| 290 | $this->extension = 'jpg'; |
| 291 | break; |
| 292 | case 'image/gif': |
| 293 | $this->basename = 'image.gif'; |
| 294 | $this->filename = 'image'; |
| 295 | $this->extension = 'gif'; |
| 296 | break; |
| 297 | case 'image/png': |
| 298 | $this->basename = 'image.png'; |
| 299 | $this->filename = 'image'; |
| 300 | $this->extension = 'png'; |
| 301 | break; |
| 302 | } |
| 303 | |
| 304 | // Convert GIF image to PNG |
| 305 | if (strtolower($this->extension) == 'gif') { |
| 306 | $this->convertImage(); |
| 307 | } else { |
| 308 | $this->mime = (strtolower($this->extension) == 'png') ? 'image/png' : 'image/jpeg'; |
| 309 | } |
| 310 | |
| 311 | // If resize dimensions are passed |
| 312 | if (($resize !== null) && !($preserveResolution)) { |
| 313 | $this->resizeImage($resize); |
| 314 | } |
| 315 | |
| 316 | if ($resize !== null) { |
| 317 | $this->resize = $resize; |
| 318 | } |
| 319 | |
| 320 | $this->width = $imgSize[0]; |
| 321 | $this->height = $imgSize[1]; |
| 322 | $this->channels = (isset($imgSize['channels'])) ? $imgSize['channels'] : null; |
| 323 | $this->depth = (isset($imgSize['bits'])) ? $imgSize['bits'] : null; |
| 324 | |
| 325 | $this->imageData = $this->stream; |
| 326 | $this->imageDataLength = strlen($this->imageData); |
| 327 | |
| 328 | $this->parseImageData(); |
| 329 | |
| 330 | return $this; |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * Set the X coordinate |
| 335 | * |
| 336 | * @param int $x |
| 337 | * @return Parser |
| 338 | */ |
| 339 | public function setX(int $x): Parser |
| 340 | { |
| 341 | $this->x = $x; |
| 342 | return $this; |
| 343 | } |
| 344 | |
| 345 | /** |
| 346 | * Set the Y coordinate |
| 347 | * |
| 348 | * @param int $y |
| 349 | * @return Parser |
| 350 | */ |
| 351 | public function setY(int $y): Parser |
| 352 | { |
| 353 | $this->y = (int)$y; |
| 354 | return $this; |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * Set the image object index |
| 359 | * |
| 360 | * @param int $i |
| 361 | * @return Parser |
| 362 | */ |
| 363 | public function setIndex(int $i): Parser |
| 364 | { |
| 365 | $this->index = $i; |
| 366 | return $this; |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Get the X coordinate |
| 371 | * |
| 372 | * @return int |
| 373 | */ |
| 374 | public function getX(): int |
| 375 | { |
| 376 | return $this->x; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Get the Y coordinate |
| 381 | * |
| 382 | * @return int |
| 383 | */ |
| 384 | public function getY(): int |
| 385 | { |
| 386 | return $this->y; |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * Get the width |
| 391 | * |
| 392 | * @return int |
| 393 | */ |
| 394 | public function getWidth(): int |
| 395 | { |
| 396 | return $this->width; |
| 397 | } |
| 398 | |
| 399 | /** |
| 400 | * Get the height |
| 401 | * |
| 402 | * @return int |
| 403 | */ |
| 404 | public function getHeight(): int |
| 405 | { |
| 406 | return $this->height; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Get the converted image |
| 411 | * |
| 412 | * @return ?string |
| 413 | */ |
| 414 | public function getConvertedImage(): ?string |
| 415 | { |
| 416 | return $this->convertedImage; |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Get the image object index |
| 421 | * |
| 422 | * @return ?int |
| 423 | */ |
| 424 | public function getIndex(): ?int |
| 425 | { |
| 426 | return $this->index; |
| 427 | } |
| 428 | |
| 429 | /** |
| 430 | * Get the image stream |
| 431 | * |
| 432 | * @return string |
| 433 | */ |
| 434 | public function getStream(): string |
| 435 | { |
| 436 | $width = $this->resize['width'] ?? $this->width; |
| 437 | $height = $this->resize['height'] ?? $this->height; |
| 438 | return "\n\nq\n\n1 0 0 1 {$this->x} {$this->y} cm\n{$width} 0 0 {$height} 0 0 cm\n/I{$this->index} Do\n\nQ\n\n"; |
| 439 | } |
| 440 | |
| 441 | /** |
| 442 | * Get the XObject |
| 443 | * |
| 444 | * @return string |
| 445 | */ |
| 446 | public function getXObject(): string |
| 447 | { |
| 448 | return "/I{$this->index} {$this->index} 0 R"; |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * Get the image objects |
| 453 | * |
| 454 | * @throws Exception |
| 455 | * @return array |
| 456 | */ |
| 457 | public function getObjects(): array |
| 458 | { |
| 459 | if (count($this->objects) == 0) { |
| 460 | $this->parse(); |
| 461 | } |
| 462 | return $this->objects; |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * Parse the image data and create the image objects |
| 467 | * |
| 468 | * @throws Exception |
| 469 | * @return void |
| 470 | */ |
| 471 | public function parse(): void |
| 472 | { |
| 473 | if ($this->index === null) { |
| 474 | throw new Exception('Error: The image index has not been set.'); |
| 475 | } |
| 476 | if ($this->mime == 'image/png') { |
| 477 | $this->parsePng(); |
| 478 | } else { |
| 479 | $this->parseJpeg(); |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * Parse image data |
| 485 | * |
| 486 | * @return void |
| 487 | */ |
| 488 | protected function parseImageData(): void |
| 489 | { |
| 490 | if (str_starts_with(strtolower($this->extension), 'jp')) { |
| 491 | switch ($this->channels) { |
| 492 | case 1: |
| 493 | $this->colorMode = 'Gray'; |
| 494 | break; |
| 495 | case 3: |
| 496 | $this->colorMode = 'RGB'; |
| 497 | break; |
| 498 | case 4: |
| 499 | $this->colorMode = 'CMYK'; |
| 500 | break; |
| 501 | } |
| 502 | } else if (strtolower($this->extension) == 'png') { |
| 503 | $colorType = ord($this->imageData[25]); |
| 504 | switch ($colorType) { |
| 505 | case 0: |
| 506 | $this->channels = 1; |
| 507 | $this->colorMode = 'Gray'; |
| 508 | break; |
| 509 | case 2: |
| 510 | $this->channels = 3; |
| 511 | $this->colorMode = 'RGB'; |
| 512 | break; |
| 513 | case 3: |
| 514 | $this->channels = 3; |
| 515 | $this->colorMode = 'Indexed'; |
| 516 | break; |
| 517 | case 4: |
| 518 | $this->channels = 1; |
| 519 | $this->colorMode = 'Gray'; |
| 520 | $this->alpha = true; |
| 521 | break; |
| 522 | case 6: |
| 523 | $this->channels = 3; |
| 524 | $this->colorMode = 'RGB'; |
| 525 | $this->alpha = true; |
| 526 | break; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | $this->createResource(); |
| 531 | |
| 532 | // Image clean up if the image was converted or resized. |
| 533 | if (($this->convertedImage !== null) && file_exists($this->convertedImage)) { |
| 534 | unlink($this->convertedImage); |
| 535 | } |
| 536 | if (($this->resizedImage !== null) && file_exists($this->resizedImage)) { |
| 537 | unlink($this->resizedImage); |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * Parse the PNG image data |
| 543 | * |
| 544 | * @throws Exception |
| 545 | * @return void |
| 546 | */ |
| 547 | protected function parsePng(): void |
| 548 | { |
| 549 | // Define some PNG image-specific variables. |
| 550 | $PLTE = null; |
| 551 | $TRNS = null; |
| 552 | $maskIndex = null; |
| 553 | $mask = null; |
| 554 | |
| 555 | // Determine the PNG colorspace. |
| 556 | if ($this->colorMode == 'Gray') { |
| 557 | $numOfColors = 1; |
| 558 | $colorSpace = '/DeviceGray'; |
| 559 | } else if (stripos($this->colorMode, 'RGB') !== false) { |
| 560 | $numOfColors = 3; |
| 561 | $colorSpace = '/DeviceRGB'; |
| 562 | } else { |
| 563 | $numOfColors = 1; |
| 564 | $palIndex = $this->index + 1; |
| 565 | |
| 566 | // If the PNG is indexed, parse and read the palette and any transparencies that might exist. |
| 567 | if (str_contains($this->imageData, 'PLTE')) { |
| 568 | $lenByte = substr($this->imageData, (strpos($this->imageData, "PLTE") - 4), 4); |
| 569 | $palLength = $this->readInt($lenByte); |
| 570 | $PLTE = substr($this->imageData, (strpos($this->imageData, "PLTE") + 4), $palLength); |
| 571 | $mask = null; |
| 572 | |
| 573 | // If a transparency exists, parse it and set the mask accordingly, along with the palette. |
| 574 | if (str_contains($this->imageData, 'tRNS')) { |
| 575 | $lenByte = substr($this->imageData, (strpos($this->imageData, "tRNS") - 4), 4); |
| 576 | $TRNS = substr($this->imageData, (strpos($this->imageData, "tRNS") + 4), $this->readInt($lenByte)); |
| 577 | $maskIndex = strpos($TRNS, chr(0)); |
| 578 | $mask = " /Mask [" . $maskIndex . " " . $maskIndex . "]\n"; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | $this->colorTotal = imagecolorstotal($this->resource); |
| 583 | $colorSpace = "[/Indexed /DeviceRGB " . ($this->colorTotal - 1) . " " . $palIndex . " 0 R]"; |
| 584 | } |
| 585 | |
| 586 | // Parse header data, bits and color type |
| 587 | $lenByte = substr($this->imageData, (strpos($this->imageData, "IHDR") - 4), 4); |
| 588 | $header = substr($this->imageData, (strpos($this->imageData, "IHDR") + 4), $this->readInt($lenByte)); |
| 589 | $bits = ord(substr($header, 8, 1)); |
| 590 | $colorType = ord(substr($header, 9, 1)); |
| 591 | |
| 592 | // Make sure the PNG does not contain a true alpha channel. |
| 593 | if (($colorType >= 4) && (($bits == 8) || ($bits == 16))) { |
| 594 | throw new Exception('Error: PNG alpha channels are not supported. Only 8-bit transparent PNG images are supported.'); |
| 595 | } |
| 596 | |
| 597 | // Parse and set the PNG image data and data length. |
| 598 | $lenByte = substr($this->imageData, (strpos($this->imageData, "IDAT") - 4), 4); |
| 599 | $this->imageDataLength = $this->readInt($lenByte); |
| 600 | $IDAT = substr($this->imageData, (strpos($this->imageData, "IDAT") + 4), $this->imageDataLength); |
| 601 | |
| 602 | // Add the image to the objects array. |
| 603 | $this->objects[$this->index] = StreamObject::parse( |
| 604 | "{$this->index} 0 obj\n<<\n /Type /XObject\n /Subtype /Image\n /Width " . $this->width . |
| 605 | "\n /Height " . $this->height . "\n /ColorSpace {$colorSpace}\n /BitsPerComponent " . $bits . |
| 606 | "\n /Filter /FlateDecode\n /DecodeParms <</Predictor 15 /Colors {$numOfColors} /BitsPerComponent " . |
| 607 | $bits . " /Columns " . $this->width . ">>\n{$mask} /Length {$this->imageDataLength}\n>>\nstream\n{$IDAT}\nendstream\nendobj\n" |
| 608 | ); |
| 609 | |
| 610 | // If it exists, add the image palette to the objects array. |
| 611 | if ($PLTE != '') { |
| 612 | $this->objects[$palIndex] = StreamObject::parse( |
| 613 | "{$palIndex} 0 obj\n<<\n /Length " . $palLength . "\n>>\nstream\n{$PLTE}\nendstream\nendobj\n" |
| 614 | ); |
| 615 | $this->objects[$palIndex]->setPalette(true); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * Parse the JPG image data |
| 621 | * |
| 622 | * @return void |
| 623 | */ |
| 624 | protected function parseJpeg(): void |
| 625 | { |
| 626 | // Add the image to the objects array. |
| 627 | $colorMode = (strtolower($this->colorMode) == 'srgb') ? 'RGB' : $this->colorMode; |
| 628 | $colorSpace = ($this->colorMode == 'CMYK') ? "/DeviceCMYK\n /Decode [1 0 1 0 1 0 1 0]" : "/Device" . $colorMode; |
| 629 | $this->objects[$this->index] = StreamObject::parse( |
| 630 | "{$this->index} 0 obj\n<<\n /Type /XObject\n /Subtype /Image\n /Width " . $this->width . |
| 631 | "\n /Height " . $this->height . "\n /ColorSpace {$colorSpace}\n /BitsPerComponent 8\n " . |
| 632 | "/Filter /DCTDecode\n /Length {$this->imageDataLength}\n>>\nstream\n{$this->imageData}\nendstream\nendobj\n" |
| 633 | ); |
| 634 | } |
| 635 | |
| 636 | /** |
| 637 | * Create a new image resource based on the current image type |
| 638 | * of the image object. |
| 639 | * |
| 640 | * @return void |
| 641 | */ |
| 642 | protected function createResource(): void |
| 643 | { |
| 644 | if ($this->stream !== null) { |
| 645 | $this->resource = imagecreatefromstring($this->stream); |
| 646 | } else if (file_exists($this->fullpath)) { |
| 647 | switch ($this->mime) { |
| 648 | case 'image/gif': |
| 649 | $this->resource = imagecreatefromgif($this->fullpath); |
| 650 | break; |
| 651 | case 'image/png': |
| 652 | $this->resource = imagecreatefrompng($this->fullpath); |
| 653 | break; |
| 654 | case 'image/jpeg': |
| 655 | $this->resource = imagecreatefromjpeg($this->fullpath); |
| 656 | break; |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | /** |
| 662 | * Method to convert the image to Jpg |
| 663 | * |
| 664 | * @param int $quality |
| 665 | * @return void |
| 666 | */ |
| 667 | public function convertToJpeg(int $quality = 70): void |
| 668 | { |
| 669 | $this->convertedImage = realpath(sys_get_temp_dir()) . DIRECTORY_SEPARATOR . $this->filename . '_' . time() . '.jpg'; |
| 670 | |
| 671 | $result = imagecreatetruecolor($this->width, $this->height); |
| 672 | imagecopyresampled( |
| 673 | $result, $this->resource, 0, 0, 0, 0, $this->width, $this->height, $this->width, $this->height |
| 674 | ); |
| 675 | |
| 676 | $this->resource = $result; |
| 677 | $this->width = imagesx($this->resource); |
| 678 | $this->height = imagesy($this->resource); |
| 679 | |
| 680 | imagejpeg($this->resource, $this->convertedImage, $quality); |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * Method to convert the image from GIF to PNG. |
| 685 | * |
| 686 | * @return void |
| 687 | */ |
| 688 | protected function convertImage(): void |
| 689 | { |
| 690 | // Define the temp converted image. |
| 691 | $this->convertedImage = realpath(sys_get_temp_dir()) . DIRECTORY_SEPARATOR . $this->filename . '_' . time() . '.png'; |
| 692 | |
| 693 | // Convert the GIF to PNG, save and clear the output buffer. |
| 694 | |
| 695 | $resource = ($this->stream !== null) ? |
| 696 | imagecreatefromstring($this->stream) : imagecreatefromgif($this->fullpath); |
| 697 | |
| 698 | imageinterlace($resource, 0); |
| 699 | imagepng($resource, $this->convertedImage); |
| 700 | |
| 701 | // Change the type of the image object to the new, |
| 702 | // requested image type. |
| 703 | $this->extension = 'png'; |
| 704 | $this->mime = 'image/png'; |
| 705 | |
| 706 | // Redefine the image object properties with the new values. |
| 707 | if ($this->stream !== null) { |
| 708 | $this->stream = file_get_contents($this->convertedImage); |
| 709 | } else { |
| 710 | $this->fullpath = $this->convertedImage; |
| 711 | } |
| 712 | $this->basename = basename($this->convertedImage); |
| 713 | $this->filename = basename($this->convertedImage, '.png'); |
| 714 | } |
| 715 | |
| 716 | /** |
| 717 | * Method to resize the image. |
| 718 | * |
| 719 | * @param array $resize |
| 720 | * @return void |
| 721 | */ |
| 722 | protected function resizeImage(array $resize): void |
| 723 | { |
| 724 | // Define the temp resized image. |
| 725 | $this->resizedImage = realpath(sys_get_temp_dir()) . DIRECTORY_SEPARATOR . $this->filename . '_' . time() . '.' . $this->extension; |
| 726 | |
| 727 | // Get image properties. |
| 728 | if ($this->stream !== null) { |
| 729 | $imgSize = getimagesizefromstring($this->stream); |
| 730 | $resource = imagecreatefromstring($this->stream); |
| 731 | } else { |
| 732 | $imgSize = getimagesize($this->fullpath); |
| 733 | $resource = ($this->mime == 'image/png') ? |
| 734 | imagecreatefrompng($this->fullpath) : imagecreatefromjpeg($this->fullpath); |
| 735 | } |
| 736 | |
| 737 | $width = $imgSize[0]; |
| 738 | $height = $imgSize[1]; |
| 739 | $output = imagecreatetruecolor($resize['width'], $resize['height']); |
| 740 | |
| 741 | imagecopyresampled($output, $resource, 0, 0, 0, 0, $resize['width'], $resize['height'], $width, $height); |
| 742 | |
| 743 | if ($this->mime == 'image/png') { |
| 744 | imagepng($output, $this->resizedImage, 1); |
| 745 | $this->filename = basename($this->resizedImage, '.png'); |
| 746 | } else { |
| 747 | imagejpeg($output, $this->resizedImage, 90); |
| 748 | $this->filename = basename($this->resizedImage, '.jpg'); |
| 749 | } |
| 750 | |
| 751 | $this->basename = basename($this->resizedImage); |
| 752 | |
| 753 | if ($this->stream !== null) { |
| 754 | $this->stream = file_get_contents($this->resizedImage); |
| 755 | } else { |
| 756 | $this->fullpath = $this->resizedImage; |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | /** |
| 761 | * Method to read an unsigned integer. |
| 762 | * |
| 763 | * @param string $data |
| 764 | * @return int |
| 765 | */ |
| 766 | protected function readInt(string $data): int |
| 767 | { |
| 768 | $ary = unpack('Nlength', $data); |
| 769 | return $ary['length']; |
| 770 | } |
| 771 | |
| 772 | } |