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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) 2009-2023 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\Image\Adapter; |
| 15 | |
| 16 | use Pop\Image\Adjust; |
| 17 | use Pop\Image\Color; |
| 18 | use Pop\Image\Draw; |
| 19 | use Pop\Image\Effect; |
| 20 | use Pop\Image\Filter; |
| 21 | use Pop\Image\Layer; |
| 22 | use Pop\Image\Type; |
| 23 | |
| 24 | /** |
| 25 | * Gd adapter class |
| 26 | * |
| 27 | * @category Pop |
| 28 | * @package Pop\Image |
| 29 | * @author Nick Sagona, III <dev@nolainteractive.com> |
| 30 | * @copyright Copyright (c) 2009-2023 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
| 31 | * @license http://www.popphp.org/license New BSD License |
| 32 | * @version 3.4.0 |
| 33 | */ |
| 34 | class Gd extends AbstractAdapter |
| 35 | { |
| 36 | |
| 37 | /** |
| 38 | * Create the image resource |
| 39 | * |
| 40 | * @return void |
| 41 | */ |
| 42 | public function createResource() |
| 43 | { |
| 44 | $this->resource = null; |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Load the image resource from the existing image file |
| 49 | * |
| 50 | * @param string $name |
| 51 | * @throws Exception |
| 52 | * @return Gd |
| 53 | */ |
| 54 | public function load($name = null) |
| 55 | { |
| 56 | if (null !== $name) { |
| 57 | $this->name = $name; |
| 58 | } |
| 59 | |
| 60 | if ((null === $this->name) || !file_exists($this->name)) { |
| 61 | throw new Exception('Error: The image file has not been passed to the image adapter'); |
| 62 | } |
| 63 | |
| 64 | if (stripos($this->name, '.gif') !== false) { |
| 65 | $this->resource = imagecreatefromgif($this->name); |
| 66 | } else if (stripos($this->name, '.jp') !== false) { |
| 67 | $this->resource = imagecreatefromjpeg($this->name); |
| 68 | if (function_exists('exif_read_data')) { |
| 69 | $exif = @exif_read_data($this->name); |
| 70 | if ($exif !== false) { |
| 71 | $this->exif = $exif; |
| 72 | } |
| 73 | } |
| 74 | } else if (stripos($this->name, '.png') !== false) { |
| 75 | $this->resource = imagecreatefrompng($this->name); |
| 76 | } else { |
| 77 | throw new Exception('Error: The image file must be a GIF, PNG or JPG'); |
| 78 | } |
| 79 | |
| 80 | if ($this->resource === false) { |
| 81 | throw new Exception('Error: Unable to load image resource'); |
| 82 | } |
| 83 | |
| 84 | $this->parseImage(getimagesize($this->name), file_get_contents($this->name)); |
| 85 | return $this; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Load the image resource from data |
| 90 | * |
| 91 | * @param string $data |
| 92 | * @param string $name |
| 93 | * @throws Exception |
| 94 | * @return Gd |
| 95 | */ |
| 96 | public function loadFromString($data, $name = null) |
| 97 | { |
| 98 | if (null !== $name) { |
| 99 | $this->name = $name; |
| 100 | } |
| 101 | |
| 102 | $this->resource = @imagecreatefromstring($data); |
| 103 | |
| 104 | if ($this->resource === false) { |
| 105 | throw new Exception('Error: Unable to load image resource'); |
| 106 | } |
| 107 | |
| 108 | $this->parseImage(getimagesizefromstring($data), $data); |
| 109 | |
| 110 | if ((strpos($this->format, 'jp') !== false) && function_exists('exif_read_data')) { |
| 111 | $exif = @exif_read_data('data://image/jpeg;base64,' . base64_encode($data)); |
| 112 | if ($exif !== false) { |
| 113 | $this->exif = $exif; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | return $this; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Create a new image resource |
| 122 | * |
| 123 | * @param int $width |
| 124 | * @param int $height |
| 125 | * @param string $name |
| 126 | * @throws Exception |
| 127 | * @return Gd |
| 128 | */ |
| 129 | public function create($width = null, $height = null, $name = null) |
| 130 | { |
| 131 | if ((null !== $width) && (null !== $height)) { |
| 132 | $this->width = $width; |
| 133 | $this->height = $height; |
| 134 | } |
| 135 | |
| 136 | if (null !== $name) { |
| 137 | $this->name = $name; |
| 138 | } |
| 139 | |
| 140 | if ((null === $this->width) && (null === $this->height)) { |
| 141 | throw new Exception('Error: You must pass a width and a height'); |
| 142 | } |
| 143 | |
| 144 | if (stripos($this->name, '.gif') !== false) { |
| 145 | $this->resource = imagecreate($this->width, $this->height); |
| 146 | $this->indexed = true; |
| 147 | $this->format = 'gif'; |
| 148 | } else { |
| 149 | $this->resource = imagecreatetruecolor($this->width, $this->height); |
| 150 | if (stripos($this->name, '.png') !== false) { |
| 151 | $this->format = 'png'; |
| 152 | } else if (stripos($this->name, '.jp') !== false) { |
| 153 | $this->format = 'jpg'; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | if ($this->resource === false) { |
| 158 | throw new Exception('Error: Unable to create image resource'); |
| 159 | } |
| 160 | |
| 161 | return $this; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Create a new image resource |
| 166 | * |
| 167 | * @param int $width |
| 168 | * @param int $height |
| 169 | * @param string $name |
| 170 | * @throws Exception |
| 171 | * @return Gd |
| 172 | */ |
| 173 | public function createIndex($width = null, $height = null, $name = null) |
| 174 | { |
| 175 | if ((null !== $width) && (null !== $height)) { |
| 176 | $this->width = $width; |
| 177 | $this->height = $height; |
| 178 | } |
| 179 | |
| 180 | if (null !== $name) { |
| 181 | $this->name = $name; |
| 182 | } |
| 183 | |
| 184 | if ((null === $this->width) && (null === $this->height)) { |
| 185 | throw new Exception('Error: You must pass a width and a height'); |
| 186 | } |
| 187 | |
| 188 | $this->resource = imagecreate($this->width, $this->height); |
| 189 | $this->indexed = true; |
| 190 | |
| 191 | if (stripos($this->name, '.png') !== false) { |
| 192 | $this->format = 'png'; |
| 193 | } else { |
| 194 | $this->format = 'gif'; |
| 195 | } |
| 196 | |
| 197 | if ($this->resource === false) { |
| 198 | throw new Exception('Error: Unable to create image resource'); |
| 199 | } |
| 200 | |
| 201 | return $this; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * Resize the image object to the width parameter passed |
| 206 | * |
| 207 | * @param int $w |
| 208 | * @return Gd |
| 209 | */ |
| 210 | public function resizeToWidth($w) |
| 211 | { |
| 212 | $scale = $w / $this->width; |
| 213 | $h = round($this->height * $scale); |
| 214 | $this->copyImage($w, $h); |
| 215 | |
| 216 | return $this; |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Resize the image object to the height parameter passed |
| 221 | * |
| 222 | * @param int $h |
| 223 | * @return Gd |
| 224 | */ |
| 225 | public function resizeToHeight($h) |
| 226 | { |
| 227 | $scale = $h / $this->height; |
| 228 | $w = round($this->width * $scale); |
| 229 | $this->copyImage($w, $h); |
| 230 | |
| 231 | return $this; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Resize the image object, allowing for the largest dimension |
| 236 | * to be scaled to the value of the $px argument. |
| 237 | * |
| 238 | * @param int $px |
| 239 | * @return Gd |
| 240 | */ |
| 241 | public function resize($px) |
| 242 | { |
| 243 | $scale = ($this->width > $this->height) ? ($px / $this->width) : ($px / $this->height); |
| 244 | $w = round($this->width * $scale); |
| 245 | $h = round($this->height * $scale); |
| 246 | $this->copyImage($w, $h); |
| 247 | |
| 248 | return $this; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Scale the image object, allowing for the dimensions to be scaled |
| 253 | * proportionally to the value of the $scale argument. |
| 254 | * |
| 255 | * @param float $scale |
| 256 | * @return Gd |
| 257 | */ |
| 258 | public function scale($scale) |
| 259 | { |
| 260 | $w = round($this->width * $scale); |
| 261 | $h = round($this->height * $scale); |
| 262 | $this->copyImage($w, $h); |
| 263 | |
| 264 | return $this; |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * Crop the image object to a image whose dimensions are based on the |
| 269 | * value of the $wid and $hgt argument. The optional $x and $y arguments |
| 270 | * allow for the adjustment of the crop to select a certain area of the |
| 271 | * image to be cropped. |
| 272 | * |
| 273 | * @param int $w |
| 274 | * @param int $h |
| 275 | * @param int $x |
| 276 | * @param int $y |
| 277 | * @return Gd |
| 278 | */ |
| 279 | public function crop($w, $h, $x = 0, $y = 0) |
| 280 | { |
| 281 | $result = imagecreatetruecolor($w, $h); |
| 282 | imagecopyresampled( |
| 283 | $result, $this->resource, 0, 0, $x, $y, $this->width, $this->height, $this->width, $this->height |
| 284 | ); |
| 285 | |
| 286 | if ($this->indexed) { |
| 287 | imagetruecolortopalette($result, false, 255); |
| 288 | } |
| 289 | |
| 290 | $this->resource = $result; |
| 291 | $this->width = imagesx($this->resource); |
| 292 | $this->height = imagesy($this->resource); |
| 293 | |
| 294 | return $this; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Crop the image object to a square image whose dimensions are based on the |
| 299 | * value of the $px argument. The optional $offset argument allows for the |
| 300 | * adjustment of the crop to select a certain area of the image to be cropped. |
| 301 | * |
| 302 | * @param int $px |
| 303 | * @param int $offset |
| 304 | * @return Gd |
| 305 | */ |
| 306 | public function cropThumb($px, $offset = null) |
| 307 | { |
| 308 | $xOffset = 0; |
| 309 | $yOffset = 0; |
| 310 | $scale = ($this->width > $this->height) ? ($px / $this->height) : ($px / $this->width); |
| 311 | $w = round($this->width * $scale); |
| 312 | $h = round($this->height * $scale); |
| 313 | |
| 314 | if (null !== $offset) { |
| 315 | if ($this->width > $this->height) { |
| 316 | $xOffset = $offset; |
| 317 | $yOffset = 0; |
| 318 | } else if ($this->width < $this->height) { |
| 319 | $xOffset = 0; |
| 320 | $yOffset = $offset; |
| 321 | } |
| 322 | } else { |
| 323 | if ($this->width > $this->height) { |
| 324 | $xOffset = round(($this->width - $this->height) / 2); |
| 325 | $yOffset = 0; |
| 326 | } else if ($this->width < $this->height) { |
| 327 | $xOffset = 0; |
| 328 | $yOffset = round(($this->height - $this->width) / 2); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | $result = imagecreatetruecolor($px, $px); |
| 333 | imagecopyresampled($result, $this->resource, 0, 0, $xOffset, $yOffset, $w, $h, $this->width, $this->height); |
| 334 | |
| 335 | if ($this->indexed) { |
| 336 | imagetruecolortopalette($result, false, 255); |
| 337 | } |
| 338 | |
| 339 | $this->resource = $result; |
| 340 | $this->width = imagesx($this->resource); |
| 341 | $this->height = imagesy($this->resource); |
| 342 | |
| 343 | return $this; |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Rotate the image object |
| 348 | * |
| 349 | * @param int $degrees |
| 350 | * @param Color\ColorInterface $bgColor |
| 351 | * @param int $alpha |
| 352 | * @return Gd |
| 353 | */ |
| 354 | public function rotate($degrees, Color\ColorInterface $bgColor = null, $alpha = null) |
| 355 | { |
| 356 | $this->resource = imagerotate($this->resource, $degrees, $this->createColor($bgColor, $alpha)); |
| 357 | $this->width = imagesx($this->resource); |
| 358 | $this->height = imagesy($this->resource); |
| 359 | return $this; |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * Method to flip the image over the x-axis |
| 364 | * |
| 365 | * @return Gd |
| 366 | */ |
| 367 | public function flip() |
| 368 | { |
| 369 | $curWidth = $this->width; |
| 370 | $curHeight = $this->height; |
| 371 | $srcX = 0; |
| 372 | $srcY = $this->height - 1; // Compensate for a 1-pixel space on the flipped image |
| 373 | $this->height = 0 - $this->height; |
| 374 | |
| 375 | $this->copyImage($curWidth, $curHeight, $srcX , $srcY); |
| 376 | $this->height = abs($this->height); |
| 377 | |
| 378 | return $this; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Method to flip the image over the y-axis |
| 383 | * |
| 384 | * @return Gd |
| 385 | */ |
| 386 | public function flop() |
| 387 | { |
| 388 | $curWidth = $this->width; |
| 389 | $curHeight = $this->height; |
| 390 | $srcX = $this->width - 1; // Compensate for a 1-pixel space on the flipped image |
| 391 | $srcY = 0; |
| 392 | $this->width = 0 - $this->width; |
| 393 | |
| 394 | $this->copyImage($curWidth, $curHeight, $srcX , $srcY); |
| 395 | $this->width = abs($this->width); |
| 396 | |
| 397 | return $this; |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * Get the image adjust object |
| 402 | * |
| 403 | * @return Adjust\AdjustInterface |
| 404 | */ |
| 405 | public function adjust() |
| 406 | { |
| 407 | if (null === $this->adjust) { |
| 408 | $this->adjust = new Adjust\Gd($this); |
| 409 | } |
| 410 | if (null === $this->adjust->getImage()) { |
| 411 | $this->adjust->setImage($this); |
| 412 | } |
| 413 | |
| 414 | return $this->adjust; |
| 415 | } |
| 416 | |
| 417 | /** |
| 418 | * Get the image draw object |
| 419 | * |
| 420 | * @return Draw\DrawInterface |
| 421 | */ |
| 422 | public function draw() |
| 423 | { |
| 424 | if (null === $this->draw) { |
| 425 | $this->draw = new Draw\Gd($this); |
| 426 | } |
| 427 | if (null === $this->draw->getImage()) { |
| 428 | $this->draw->setImage($this); |
| 429 | } |
| 430 | return $this->draw; |
| 431 | } |
| 432 | |
| 433 | /** |
| 434 | * Get the image effect object |
| 435 | * |
| 436 | * @return Effect\EffectInterface |
| 437 | */ |
| 438 | public function effect() |
| 439 | { |
| 440 | if (null === $this->effect) { |
| 441 | $this->effect = new Effect\Gd($this); |
| 442 | } |
| 443 | if (null === $this->effect->getImage()) { |
| 444 | $this->effect->setImage($this); |
| 445 | } |
| 446 | return $this->effect; |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * Get the image filter object |
| 451 | * |
| 452 | * @return Filter\FilterInterface |
| 453 | */ |
| 454 | public function filter() |
| 455 | { |
| 456 | if (null === $this->filter) { |
| 457 | $this->filter = new Filter\Gd($this); |
| 458 | } |
| 459 | if (null === $this->filter->getImage()) { |
| 460 | $this->filter->setImage($this); |
| 461 | } |
| 462 | return $this->filter; |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * Get the image layer object |
| 467 | * |
| 468 | * @return Layer\LayerInterface |
| 469 | */ |
| 470 | public function layer() |
| 471 | { |
| 472 | if (null === $this->layer) { |
| 473 | $this->layer = new Layer\Gd($this); |
| 474 | } |
| 475 | if (null === $this->layer->getImage()) { |
| 476 | $this->layer->setImage($this); |
| 477 | } |
| 478 | return $this->layer; |
| 479 | } |
| 480 | |
| 481 | /** |
| 482 | * Get the image type object |
| 483 | * |
| 484 | * @return Type\TypeInterface |
| 485 | */ |
| 486 | public function type() |
| 487 | { |
| 488 | if (null === $this->type) { |
| 489 | $this->type = new Type\Gd($this); |
| 490 | } |
| 491 | if (null === $this->type->getImage()) { |
| 492 | $this->type->setImage($this); |
| 493 | } |
| 494 | return $this->type; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * Convert the image object to another format |
| 499 | * |
| 500 | * @param string $to |
| 501 | * @throws Exception |
| 502 | * @return Gd |
| 503 | */ |
| 504 | public function convert($to) |
| 505 | { |
| 506 | $to = strtolower($to); |
| 507 | |
| 508 | if (($to != 'jpg') && ($to != 'jpeg') && ($to != 'gif') && ($to != 'png')) { |
| 509 | throw new Exception('Error: The image type must be a GIF, PNG or JPG'); |
| 510 | } |
| 511 | |
| 512 | if (null === $this->resource) { |
| 513 | throw new Exception('Error: An image resource has not been created or loaded'); |
| 514 | } |
| 515 | |
| 516 | switch ($to) { |
| 517 | case 'jpg': |
| 518 | case 'jpeg': |
| 519 | $this->format = 'jpg'; |
| 520 | $this->indexed = false; |
| 521 | break; |
| 522 | case 'png': |
| 523 | $this->format = 'png'; |
| 524 | break; |
| 525 | case 'gif': |
| 526 | $this->format = 'gif'; |
| 527 | $this->indexed = true; |
| 528 | break; |
| 529 | } |
| 530 | |
| 531 | if ((null !== $this->name) && (strpos($this->name, '.') !== false)) { |
| 532 | $this->name = substr($this->name, 0, (strrpos($this->name, '.') + 1)) . $this->format; |
| 533 | } |
| 534 | |
| 535 | $result = imagecreatetruecolor($this->width, $this->height); |
| 536 | imagecopyresampled( |
| 537 | $result, $this->resource, 0, 0, 0, 0, $this->width, $this->height, $this->width, $this->height |
| 538 | ); |
| 539 | |
| 540 | if ($this->indexed) { |
| 541 | imagetruecolortopalette($result, false, 255); |
| 542 | } |
| 543 | |
| 544 | $this->resource = $result; |
| 545 | $this->width = imagesx($this->resource); |
| 546 | $this->height = imagesy($this->resource); |
| 547 | |
| 548 | return $this; |
| 549 | } |
| 550 | |
| 551 | /** |
| 552 | * Write the image object to a file on disk |
| 553 | * |
| 554 | * @param string $to |
| 555 | * @param int $quality |
| 556 | * @throws Exception |
| 557 | * @return void |
| 558 | */ |
| 559 | public function writeToFile($to = null, $quality = 100) |
| 560 | { |
| 561 | if (null === $this->resource) { |
| 562 | throw new Exception('Error: An image resource has not been created or loaded'); |
| 563 | } |
| 564 | |
| 565 | if (((int)$quality < 0) || ((int)$quality > 100)) { |
| 566 | throw new \OutOfRangeException('Error: The quality parameter must be between 0 and 100'); |
| 567 | } |
| 568 | |
| 569 | $this->format = strtolower($this->format); |
| 570 | |
| 571 | if (null === $to) { |
| 572 | $to = (null !== $this->name) ? basename($this->name) : 'pop-image.' . $this->format; |
| 573 | } else { |
| 574 | $this->name = $to; |
| 575 | } |
| 576 | |
| 577 | $this->generateImage((int)$quality, $to); |
| 578 | } |
| 579 | |
| 580 | /** |
| 581 | * Output the image object directly to HTTP |
| 582 | * |
| 583 | * @param int $quality |
| 584 | * @param string $to |
| 585 | * @param boolean $download |
| 586 | * @param boolean $sendHeaders |
| 587 | * @param array $headers |
| 588 | * @throws Exception |
| 589 | * @return void |
| 590 | */ |
| 591 | public function outputToHttp($quality = 100, $to = null, $download = false, $sendHeaders = true, array $headers = []) |
| 592 | { |
| 593 | if (null === $this->resource) { |
| 594 | throw new Exception('Error: An image resource has not been created or loaded'); |
| 595 | } |
| 596 | |
| 597 | if (((int)$quality < 0) || ((int)$quality > 100)) { |
| 598 | throw new \OutOfRangeException('Error: The quality parameter must be between 0 and 100'); |
| 599 | } |
| 600 | |
| 601 | $this->format = strtolower($this->format); |
| 602 | |
| 603 | if (null === $to) { |
| 604 | $to = (null !== $this->name) ? basename($this->name) : 'pop-image.' . $this->format; |
| 605 | } |
| 606 | |
| 607 | $this->sendHeaders($to, $download, $headers); |
| 608 | $this->generateImage((int)$quality); |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * Destroy the image object and the related image file directly |
| 613 | * |
| 614 | * @param boolean $delete |
| 615 | * @return void |
| 616 | */ |
| 617 | public function destroy($delete = false) |
| 618 | { |
| 619 | // Destroy the image resource. |
| 620 | if (null !== $this->resource) { |
| 621 | if (!is_string($this->resource) && is_resource($this->resource)) { |
| 622 | imagedestroy($this->resource); |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | $this->resource = null; |
| 627 | clearstatcache(); |
| 628 | |
| 629 | // If the $delete flag is passed, delete the image file. |
| 630 | if (($delete) && file_exists($this->name)) { |
| 631 | unlink($this->name); |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | /** |
| 636 | * Create and return a color |
| 637 | * |
| 638 | * @param Color\ColorInterface $color |
| 639 | * @param int $alpha |
| 640 | * @throws Exception |
| 641 | * @return mixed |
| 642 | */ |
| 643 | public function createColor(Color\ColorInterface $color = null, $alpha = null) |
| 644 | { |
| 645 | if (null === $color) { |
| 646 | $color = new Color\Rgb(0, 0, 0); |
| 647 | } |
| 648 | |
| 649 | if (!($color instanceof Color\Rgb)) { |
| 650 | $color = $color->toRgb(); |
| 651 | } |
| 652 | |
| 653 | $r = $color->getR(); |
| 654 | $g = $color->getG(); |
| 655 | $b = $color->getB(); |
| 656 | |
| 657 | if (null !== $alpha) { |
| 658 | if (((int)$alpha < 0) || ((int)$alpha > 127)) { |
| 659 | throw new \OutOfRangeException('Error: The alpha parameter must be between 0 and 127'); |
| 660 | } |
| 661 | return imagecolorallocatealpha($this->resource, (int)$r, (int)$g, (int)$b, (int)$alpha); |
| 662 | } else { |
| 663 | return imagecolorallocate($this->resource, (int)$r, (int)$g, (int)$b); |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | /** |
| 668 | * Output the image |
| 669 | * |
| 670 | * @return string |
| 671 | */ |
| 672 | public function __toString() |
| 673 | { |
| 674 | $this->sendHeaders(); |
| 675 | $this->generateImage(100); |
| 676 | return ''; |
| 677 | } |
| 678 | |
| 679 | /** |
| 680 | * Copy the image resource to the image output resource with the set parameters |
| 681 | * |
| 682 | * @param int $w |
| 683 | * @param int $h |
| 684 | * @param int $x |
| 685 | * @param int $y |
| 686 | * @return void |
| 687 | */ |
| 688 | protected function copyImage($w, $h, $x = 0, $y = 0) |
| 689 | { |
| 690 | $result = imagecreatetruecolor($w, $h); |
| 691 | imagecopyresampled($result, $this->resource, 0, 0, $x, $y, $w, $h, $this->width, $this->height); |
| 692 | |
| 693 | if ($this->indexed) { |
| 694 | imagetruecolortopalette($result, false, 255); |
| 695 | } |
| 696 | |
| 697 | $this->resource = $result; |
| 698 | $this->width = imagesx($this->resource); |
| 699 | $this->height = imagesy($this->resource); |
| 700 | } |
| 701 | |
| 702 | /** |
| 703 | * Parse the image data |
| 704 | * |
| 705 | * @param array $size |
| 706 | * @param string $data |
| 707 | * @return void |
| 708 | */ |
| 709 | protected function parseImage(array $size, $data) |
| 710 | { |
| 711 | $this->width = $size[0]; |
| 712 | $this->height = $size[1]; |
| 713 | |
| 714 | if ((($size[2] == IMAGETYPE_JPEG) || ($size[2] == IMAGETYPE_JPEG2000)) && isset($size['channels'])) { |
| 715 | switch ($size['channels']) { |
| 716 | case 1: |
| 717 | $this->colorspace = self::IMAGE_GRAY; |
| 718 | break; |
| 719 | case 3: |
| 720 | $this->colorspace = self::IMAGE_RGB; |
| 721 | break; |
| 722 | case 4: |
| 723 | $this->colorspace = self::IMAGE_CMYK; |
| 724 | break; |
| 725 | } |
| 726 | $this->format = 'jpg'; |
| 727 | } else if ($size[2] == IMAGETYPE_PNG) { |
| 728 | switch (ord($data[25])) { |
| 729 | case 0: |
| 730 | case 4: |
| 731 | $this->colorspace = self::IMAGE_GRAY; |
| 732 | break; |
| 733 | case 2: |
| 734 | case 6: |
| 735 | $this->colorspace = self::IMAGE_RGB; |
| 736 | break; |
| 737 | case 3: |
| 738 | $this->colorspace = self::IMAGE_RGB; |
| 739 | $this->indexed = true; |
| 740 | break; |
| 741 | } |
| 742 | $this->format = 'png'; |
| 743 | } else if ($size[2] == IMAGETYPE_GIF) { |
| 744 | $this->colorspace = self::IMAGE_RGB; |
| 745 | $this->indexed = true; |
| 746 | $this->format = 'gif'; |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | /** |
| 751 | * Parse the image data |
| 752 | * |
| 753 | * @param int $quality |
| 754 | * @param string $to |
| 755 | * @return void |
| 756 | */ |
| 757 | protected function generateImage($quality, $to = null) |
| 758 | { |
| 759 | switch ($this->format) { |
| 760 | case 'jpg': |
| 761 | case 'jpeg': |
| 762 | imagejpeg($this->resource, $to, (int)$quality); |
| 763 | break; |
| 764 | case 'png': |
| 765 | $quality = ($quality < 10) ? 9 : 10 - round(($quality / 10), PHP_ROUND_HALF_DOWN); |
| 766 | imagepng($this->resource, $to, (int)$quality); |
| 767 | break; |
| 768 | case 'gif': |
| 769 | imagegif($this->resource, $to); |
| 770 | break; |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | } |