src/Object/Image.php

   1 <?php
   2 /**
   3  * @file src/Object/Image.php
   4  * @brief This file contains the Image class for image processing
   5  */
   6 namespace Friendica\Object;
   7
   8 use Friendica\App;
   9 use Friendica\Core\Cache;
  10 use Friendica\Core\Config;
  11 use Friendica\Core\L10n;
  12 use Friendica\Core\Logger;
  13 use Friendica\Core\System;
  14 use Friendica\Database\DBA;
  15 use Friendica\Model\Photo;
  16 use Friendica\Util\Network;
  17 use Exception;
  18 use Imagick;
  19 use ImagickPixel;
  20
  21 /**
  22  * Class to handle images
  23  */
  24 class Image
  25 {
  26         private $image;
  27
  28         /*
  29          * Put back gd stuff, not everybody have Imagick
  30          */
  31         private $imagick;
  32         private $width;
  33         private $height;
  34         private $valid;
  35         private $type;
  36         private $types;
  37
  38         /**
  39          * @brief supported mimetypes and corresponding file extensions
  40          * @return array
  41          */
  42         public static function supportedTypes()
  43         {
  44                 if (class_exists('Imagick')) {
  45                         // Imagick::queryFormats won't help us a lot there...
  46                         // At least, not yet, other parts of friendica uses this array
  47                         $t = [
  48                                 'image/jpeg' => 'jpg',
  49                                 'image/png' => 'png',
  50                                 'image/gif' => 'gif'
  51                         ];
  52                 } else {
  53                         $t = [];
  54                         $t['image/jpeg'] ='jpg';
  55                         if (imagetypes() & IMG_PNG) {
  56                                 $t['image/png'] = 'png';
  57                         }
  58                 }
  59
  60                 return $t;
  61         }
  62
  63         /**
  64          * @brief Constructor
  65          * @param string  $data
  66          * @param boolean $type optional, default null
  67          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  68          * @throws \ImagickException
  69          */
  70         public function __construct($data, $type = null)
  71         {
  72                 $this->imagick = class_exists('Imagick');
  73                 $this->types = static::supportedTypes();
  74                 if (!array_key_exists($type, $this->types)) {
  75                         $type='image/jpeg';
  76                 }
  77                 $this->type = $type;
  78
  79                 if ($this->isImagick() && $this->loadData($data)) {
  80                         return true;
  81                 } else {
  82                         // Failed to load with Imagick, fallback
  83                         $this->imagick = false;
  84                 }
  85                 return $this->loadData($data);
  86         }
  87
  88         /**
  89          * @brief Destructor
  90          * @return void
  91          */
  92         public function __destruct()
  93         {
  94                 if ($this->image) {
  95                         if ($this->isImagick()) {
  96                                 $this->image->clear();
  97                                 $this->image->destroy();
  98                                 return;
  99                         }
 100                         if (is_resource($this->image)) {
 101                                 imagedestroy($this->image);
 102                         }
 103                 }
 104         }
 105
 106         /**
 107          * @return boolean
 108          */
 109         public function isImagick()
 110         {
 111                 return $this->imagick;
 112         }
 113
 114         /**
 115          * @brief Maps Mime types to Imagick formats
 116          * @return array With with image formats (mime type as key)
 117          */
 118         public static function getFormatsMap()
 119         {
 120                 $m = [
 121                         'image/jpeg' => 'JPG',
 122                         'image/png' => 'PNG',
 123                         'image/gif' => 'GIF'
 124                 ];
 125                 return $m;
 126         }
 127
 128         /**
 129          * @param string $data data
 130          * @return boolean
 131          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 132          * @throws \ImagickException
 133          */
 134         private function loadData($data)
 135         {
 136                 if ($this->isImagick()) {
 137                         $this->image = new Imagick();
 138                         try {
 139                                 $this->image->readImageBlob($data);
 140                         } catch (Exception $e) {
 141                                 // Imagick couldn't use the data
 142                                 return false;
 143                         }
 144
 145                         /*
 146                          * Setup the image to the format it will be saved to
 147                          */
 148                         $map = self::getFormatsMap();
 149                         $format = $map[$this->type];
 150                         $this->image->setFormat($format);
 151
 152                         // Always coalesce, if it is not a multi-frame image it won't hurt anyway
 153                         $this->image = $this->image->coalesceImages();
 154
 155                         /*
 156                          * setup the compression here, so we'll do it only once
 157                          */
 158                         switch ($this->getType()) {
 159                                 case "image/png":
 160                                         $quality = Config::get('system', 'png_quality');
 161                                         if ((! $quality) || ($quality > 9)) {
 162                                                 $quality = PNG_QUALITY;
 163                                         }
 164                                         /*
 165                                          * From http://www.imagemagick.org/script/command-line-options.php#quality:
 166                                          *
 167                                          * 'For the MNG and PNG image formats, the quality value sets
 168                                          * the zlib compression level (quality / 10) and filter-type (quality % 10).
 169                                          * The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
 170                                          * unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
 171                                          */
 172                                         $quality = $quality * 10;
 173                                         $this->image->setCompressionQuality($quality);
 174                                         break;
 175                                 case "image/jpeg":
 176                                         $quality = Config::get('system', 'jpeg_quality');
 177                                         if ((! $quality) || ($quality > 100)) {
 178                                                 $quality = JPEG_QUALITY;
 179                                         }
 180                                         $this->image->setCompressionQuality($quality);
 181                         }
 182
 183                         // The 'width' and 'height' properties are only used by non-Imagick routines.
 184                         $this->width  = $this->image->getImageWidth();
 185                         $this->height = $this->image->getImageHeight();
 186                         $this->valid  = true;
 187
 188                         return true;
 189                 }
 190
 191                 $this->valid = false;
 192                 $this->image = @imagecreatefromstring($data);
 193                 if ($this->image !== false) {
 194                         $this->width  = imagesx($this->image);
 195                         $this->height = imagesy($this->image);
 196                         $this->valid  = true;
 197                         imagealphablending($this->image, false);
 198                         imagesavealpha($this->image, true);
 199
 200                         return true;
 201                 }
 202
 203                 return false;
 204         }
 205
 206         /**
 207          * @return boolean
 208          */
 209         public function isValid()
 210         {
 211                 if ($this->isImagick()) {
 212                         return ($this->image !== false);
 213                 }
 214                 return $this->valid;
 215         }
 216
 217         /**
 218          * @return mixed
 219          */
 220         public function getWidth()
 221         {
 222                 if (!$this->isValid()) {
 223                         return false;
 224                 }
 225
 226                 if ($this->isImagick()) {
 227                         return $this->image->getImageWidth();
 228                 }
 229                 return $this->width;
 230         }
 231
 232         /**
 233          * @return mixed
 234          */
 235         public function getHeight()
 236         {
 237                 if (!$this->isValid()) {
 238                         return false;
 239                 }
 240
 241                 if ($this->isImagick()) {
 242                         return $this->image->getImageHeight();
 243                 }
 244                 return $this->height;
 245         }
 246
 247         /**
 248          * @return mixed
 249          */
 250         public function getImage()
 251         {
 252                 if (!$this->isValid()) {
 253                         return false;
 254                 }
 255
 256                 if ($this->isImagick()) {
 257                         /* Clean it */
 258                         $this->image = $this->image->deconstructImages();
 259                         return $this->image;
 260                 }
 261                 return $this->image;
 262         }
 263
 264         /**
 265          * @return mixed
 266          */
 267         public function getType()
 268         {
 269                 if (!$this->isValid()) {
 270                         return false;
 271                 }
 272
 273                 return $this->type;
 274         }
 275
 276         /**
 277          * @return mixed
 278          */
 279         public function getExt()
 280         {
 281                 if (!$this->isValid()) {
 282                         return false;
 283                 }
 284
 285                 return $this->types[$this->getType()];
 286         }
 287
 288         /**
 289          * @param integer $max max dimension
 290          * @return mixed
 291          */
 292         public function scaleDown($max)
 293         {
 294                 if (!$this->isValid()) {
 295                         return false;
 296                 }
 297
 298                 $width = $this->getWidth();
 299                 $height = $this->getHeight();
 300
 301                 if ((! $width)|| (! $height)) {
 302                         return false;
 303                 }
 304
 305                 if ($width > $max && $height > $max) {
 306                         // very tall image (greater than 16:9)
 307                         // constrain the width - let the height float.
 308
 309                         if ((($height * 9) / 16) > $width) {
 310                                 $dest_width = $max;
 311                                 $dest_height = intval(($height * $max) / $width);
 312                         } elseif ($width > $height) {
 313                                 // else constrain both dimensions
 314                                 $dest_width = $max;
 315                                 $dest_height = intval(($height * $max) / $width);
 316                         } else {
 317                                 $dest_width = intval(($width * $max) / $height);
 318                                 $dest_height = $max;
 319                         }
 320                 } else {
 321                         if ($width > $max) {
 322                                 $dest_width = $max;
 323                                 $dest_height = intval(($height * $max) / $width);
 324                         } else {
 325                                 if ($height > $max) {
 326                                         // very tall image (greater than 16:9)
 327                                         // but width is OK - don't do anything
 328
 329                                         if ((($height * 9) / 16) > $width) {
 330                                                 $dest_width = $width;
 331                                                 $dest_height = $height;
 332                                         } else {
 333                                                 $dest_width = intval(($width * $max) / $height);
 334                                                 $dest_height = $max;
 335                                         }
 336                                 } else {
 337                                         $dest_width = $width;
 338                                         $dest_height = $height;
 339                                 }
 340                         }
 341                 }
 342
 343                 return $this->scale($dest_width, $dest_height);
 344         }
 345
 346         /**
 347          * @param integer $degrees degrees to rotate image
 348          * @return mixed
 349          */
 350         public function rotate($degrees)
 351         {
 352                 if (!$this->isValid()) {
 353                         return false;
 354                 }
 355
 356                 if ($this->isImagick()) {
 357                         $this->image->setFirstIterator();
 358                         do {
 359                                 $this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
 360                         } while ($this->image->nextImage());
 361                         return;
 362                 }
 363
 364                 // if script dies at this point check memory_limit setting in php.ini
 365                 $this->image  = imagerotate($this->image, $degrees, 0);
 366                 $this->width  = imagesx($this->image);
 367                 $this->height = imagesy($this->image);
 368         }
 369
 370         /**
 371          * @param boolean $horiz optional, default true
 372          * @param boolean $vert  optional, default false
 373          * @return mixed
 374          */
 375         public function flip($horiz = true, $vert = false)
 376         {
 377                 if (!$this->isValid()) {
 378                         return false;
 379                 }
 380
 381                 if ($this->isImagick()) {
 382                         $this->image->setFirstIterator();
 383                         do {
 384                                 if ($horiz) {
 385                                         $this->image->flipImage();
 386                                 }
 387                                 if ($vert) {
 388                                         $this->image->flopImage();
 389                                 }
 390                         } while ($this->image->nextImage());
 391                         return;
 392                 }
 393
 394                 $w = imagesx($this->image);
 395                 $h = imagesy($this->image);
 396                 $flipped = imagecreate($w, $h);
 397                 if ($horiz) {
 398                         for ($x = 0; $x < $w; $x++) {
 399                                 imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
 400                         }
 401                 }
 402                 if ($vert) {
 403                         for ($y = 0; $y < $h; $y++) {
 404                                 imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
 405                         }
 406                 }
 407                 $this->image = $flipped;
 408         }
 409
 410         /**
 411          * @param string $filename filename
 412          * @return mixed
 413          */
 414         public function orient($filename)
 415         {
 416                 if ($this->isImagick()) {
 417                         // based off comment on http://php.net/manual/en/imagick.getimageorientation.php
 418                         $orientation = $this->image->getImageOrientation();
 419                         switch ($orientation) {
 420                                 case Imagick::ORIENTATION_BOTTOMRIGHT:
 421                                         $this->image->rotateimage("#000", 180);
 422                                         break;
 423                                 case Imagick::ORIENTATION_RIGHTTOP:
 424                                         $this->image->rotateimage("#000", 90);
 425                                         break;
 426                                 case Imagick::ORIENTATION_LEFTBOTTOM:
 427                                         $this->image->rotateimage("#000", -90);
 428                                         break;
 429                         }
 430
 431                         $this->image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
 432                         return true;
 433                 }
 434                 // based off comment on http://php.net/manual/en/function.imagerotate.php
 435
 436                 if (!$this->isValid()) {
 437                         return false;
 438                 }
 439
 440                 if ((!function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg')) {
 441                         return;
 442                 }
 443
 444                 $exif = @exif_read_data($filename, null, true);
 445                 if (!$exif) {
 446                         return;
 447                 }
 448
 449                 $ort = $exif['IFD0']['Orientation'];
 450
 451                 switch ($ort) {
 452                         case 1: // nothing
 453                                 break;
 454
 455                         case 2: // horizontal flip
 456                                 $this->flip();
 457                                 break;
 458
 459                         case 3: // 180 rotate left
 460                                 $this->rotate(180);
 461                                 break;
 462
 463                         case 4: // vertical flip
 464                                 $this->flip(false, true);
 465                                 break;
 466
 467                         case 5: // vertical flip + 90 rotate right
 468                                 $this->flip(false, true);
 469                                 $this->rotate(-90);
 470                                 break;
 471
 472                         case 6: // 90 rotate right
 473                                 $this->rotate(-90);
 474                                 break;
 475
 476                         case 7: // horizontal flip + 90 rotate right
 477                                 $this->flip();
 478                                 $this->rotate(-90);
 479                                 break;
 480
 481                         case 8: // 90 rotate left
 482                                 $this->rotate(90);
 483                                 break;
 484                 }
 485
 486                 //      Logger::log('exif: ' . print_r($exif,true));
 487                 return $exif;
 488         }
 489
 490         /**
 491          * @param integer $min minimum dimension
 492          * @return mixed
 493          */
 494         public function scaleUp($min)
 495         {
 496                 if (!$this->isValid()) {
 497                         return false;
 498                 }
 499
 500                 $width = $this->getWidth();
 501                 $height = $this->getHeight();
 502
 503                 if ((!$width)|| (!$height)) {
 504                         return false;
 505                 }
 506
 507                 if ($width < $min && $height < $min) {
 508                         if ($width > $height) {
 509                                 $dest_width = $min;
 510                                 $dest_height = intval(($height * $min) / $width);
 511                         } else {
 512                                 $dest_width = intval(($width * $min) / $height);
 513                                 $dest_height = $min;
 514                         }
 515                 } else {
 516                         if ($width < $min) {
 517                                 $dest_width = $min;
 518                                 $dest_height = intval(($height * $min) / $width);
 519                         } else {
 520                                 if ($height < $min) {
 521                                         $dest_width = intval(($width * $min) / $height);
 522                                         $dest_height = $min;
 523                                 } else {
 524                                         $dest_width = $width;
 525                                         $dest_height = $height;
 526                                 }
 527                         }
 528                 }
 529
 530                 return $this->scale($dest_width, $dest_height);
 531         }
 532
 533         /**
 534          * @param integer $dim dimension
 535          * @return mixed
 536          */
 537         public function scaleToSquare($dim)
 538         {
 539                 if (!$this->isValid()) {
 540                         return false;
 541                 }
 542
 543                 return $this->scale($dim, $dim);
 544         }
 545
 546         /**
 547          * @brief Scale image to target dimensions
 548          *
 549          * @param int $dest_width
 550          * @param int $dest_height
 551          * @return boolean
 552          */
 553         private function scale($dest_width, $dest_height)
 554         {
 555                 if (!$this->isValid()) {
 556                         return false;
 557                 }
 558
 559                 if ($this->isImagick()) {
 560                         /*
 561                          * If it is not animated, there will be only one iteration here,
 562                          * so don't bother checking
 563                          */
 564                         // Don't forget to go back to the first frame
 565                         $this->image->setFirstIterator();
 566                         do {
 567                                 // FIXME - implement horizontal bias for scaling as in following GD functions
 568                                 // to allow very tall images to be constrained only horizontally.
 569                                 $this->image->scaleImage($dest_width, $dest_height);
 570                         } while ($this->image->nextImage());
 571
 572                         // These may not be necessary anymore
 573                         $this->width  = $this->image->getImageWidth();
 574                         $this->height = $this->image->getImageHeight();
 575                 } else {
 576                         $dest = imagecreatetruecolor($dest_width, $dest_height);
 577                         imagealphablending($dest, false);
 578                         imagesavealpha($dest, true);
 579
 580                         if ($this->type=='image/png') {
 581                                 imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 582                         }
 583
 584                         imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $this->width, $this->height);
 585
 586                         if ($this->image) {
 587                                 imagedestroy($this->image);
 588                         }
 589
 590                         $this->image = $dest;
 591                         $this->width  = imagesx($this->image);
 592                         $this->height = imagesy($this->image);
 593                 }
 594
 595                 return true;
 596         }
 597
 598         /**
 599          * @param integer $max maximum
 600          * @param integer $x   x coordinate
 601          * @param integer $y   y coordinate
 602          * @param integer $w   width
 603          * @param integer $h   height
 604          * @return mixed
 605          */
 606         public function crop($max, $x, $y, $w, $h)
 607         {
 608                 if (!$this->isValid()) {
 609                         return false;
 610                 }
 611
 612                 if ($this->isImagick()) {
 613                         $this->image->setFirstIterator();
 614                         do {
 615                                 $this->image->cropImage($w, $h, $x, $y);
 616                                 /*
 617                                  * We need to remove the canva,
 618                                  * or the image is not resized to the crop:
 619                                  * http://php.net/manual/en/imagick.cropimage.php#97232
 620                                  */
 621                                 $this->image->setImagePage(0, 0, 0, 0);
 622                         } while ($this->image->nextImage());
 623                         return $this->scaleDown($max);
 624                 }
 625
 626                 $dest = imagecreatetruecolor($max, $max);
 627                 imagealphablending($dest, false);
 628                 imagesavealpha($dest, true);
 629                 if ($this->type=='image/png') {
 630                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 631                 }
 632                 imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
 633                 if ($this->image) {
 634                         imagedestroy($this->image);
 635                 }
 636                 $this->image = $dest;
 637                 $this->width  = imagesx($this->image);
 638                 $this->height = imagesy($this->image);
 639         }
 640
 641         /**
 642          * @param string $path file path
 643          * @return mixed
 644          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 645          */
 646         public function saveToFilePath($path)
 647         {
 648                 if (!$this->isValid()) {
 649                         return false;
 650                 }
 651
 652                 $string = $this->asString();
 653
 654                 $a = \get_app();
 655
 656                 $stamp1 = microtime(true);
 657                 file_put_contents($path, $string);
 658                 $a->saveTimestamp($stamp1, "file");
 659         }
 660
 661         /**
 662          * @brief Magic method allowing string casting of an Image object
 663          *
 664          * Ex: $data = $Image->asString();
 665          * can be replaced by
 666          * $data = (string) $Image;
 667          *
 668          * @return string
 669          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 670          */
 671         public function __toString() {
 672                 return $this->asString();
 673         }
 674
 675         /**
 676          * @return mixed
 677          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 678          */
 679         public function asString()
 680         {
 681                 if (!$this->isValid()) {
 682                         return false;
 683                 }
 684
 685                 if ($this->isImagick()) {
 686                         /* Clean it */
 687                         $this->image = $this->image->deconstructImages();
 688                         $string = $this->image->getImagesBlob();
 689                         return $string;
 690                 }
 691
 692                 ob_start();
 693
 694                 // Enable interlacing
 695                 imageinterlace($this->image, true);
 696
 697                 switch ($this->getType()) {
 698                         case "image/png":
 699                                 $quality = Config::get('system', 'png_quality');
 700                                 if ((!$quality) || ($quality > 9)) {
 701                                         $quality = PNG_QUALITY;
 702                                 }
 703                                 imagepng($this->image, null, $quality);
 704                                 break;
 705                         case "image/jpeg":
 706                                 $quality = Config::get('system', 'jpeg_quality');
 707                                 if ((!$quality) || ($quality > 100)) {
 708                                         $quality = JPEG_QUALITY;
 709                                 }
 710                                 imagejpeg($this->image, null, $quality);
 711                 }
 712                 $string = ob_get_contents();
 713                 ob_end_clean();
 714
 715                 return $string;
 716         }
 717
 718         /**
 719          * Guess image mimetype from filename or from Content-Type header
 720          *
 721          * @param string  $filename Image filename
 722          * @param boolean $fromcurl Check Content-Type header from curl request
 723          * @param string  $header   passed headers to take into account
 724          *
 725          * @return object
 726          * @throws \ImagickException
 727          */
 728         public static function guessType($filename, $fromcurl = false, $header = '')
 729         {
 730                 Logger::log('Image: guessType: '.$filename . ($fromcurl?' from curl headers':''), Logger::DEBUG);
 731                 $type = null;
 732                 if ($fromcurl) {
 733                         $headers=[];
 734                         $h = explode("\n", $header);
 735                         foreach ($h as $l) {
 736                                 $data = array_map("trim", explode(":", trim($l), 2));
 737                                 if (count($data) > 1) {
 738                                         list($k,$v) = $data;
 739                                         $headers[$k] = $v;
 740                                 }
 741                         }
 742                         if (array_key_exists('Content-Type', $headers))
 743                                 $type = $headers['Content-Type'];
 744                 }
 745                 if (is_null($type)) {
 746                         // Guessing from extension? Isn't that... dangerous?
 747                         if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
 748                                 /**
 749                                  * Well, this not much better,
 750                                  * but at least it comes from the data inside the image,
 751                                  * we won't be tricked by a manipulated extension
 752                                  */
 753                                 $image = new Imagick($filename);
 754                                 $type = $image->getImageMimeType();
 755                                 $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
 756                         } else {
 757                                 $ext = pathinfo($filename, PATHINFO_EXTENSION);
 758                                 $types = self::supportedTypes();
 759                                 $type = "image/jpeg";
 760                                 foreach ($types as $m => $e) {
 761                                         if ($ext == $e) {
 762                                                 $type = $m;
 763                                         }
 764                                 }
 765                         }
 766                 }
 767                 Logger::log('Image: guessType: type='.$type, Logger::DEBUG);
 768                 return $type;
 769         }
 770
 771         /**
 772          * @param string $url url
 773          * @return object
 774          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 775          */
 776         public static function getInfoFromURL($url)
 777         {
 778                 $data = [];
 779
 780                 if (empty($url)) {
 781                         return $data;
 782                 }
 783
 784                 $data = Cache::get($url);
 785
 786                 if (is_null($data) || !$data || !is_array($data)) {
 787                         $img_str = Network::fetchUrl($url, true, $redirects, 4);
 788
 789                         if (!$img_str) {
 790                                 return false;
 791                         }
 792
 793                         $filesize = strlen($img_str);
 794
 795                         try {
 796                                 if (function_exists("getimagesizefromstring")) {
 797                                         $data = @getimagesizefromstring($img_str);
 798                                 } else {
 799                                         $tempfile = tempnam(get_temppath(), "cache");
 800
 801                                         $a = \get_app();
 802                                         $stamp1 = microtime(true);
 803                                         file_put_contents($tempfile, $img_str);
 804                                         $a->saveTimestamp($stamp1, "file");
 805
 806                                         $data = getimagesize($tempfile);
 807                                         unlink($tempfile);
 808                                 }
 809                         } catch (Exception $e) {
 810                                 return false;
 811                         }
 812
 813                         if ($data) {
 814                                 $data["size"] = $filesize;
 815                         }
 816
 817                         Cache::set($url, $data);
 818                 }
 819
 820                 return $data;
 821         }
 822
 823         /**
 824          * @param integer $width  width
 825          * @param integer $height height
 826          * @param integer $max    max
 827          * @return array
 828          */
 829         public static function getScalingDimensions($width, $height, $max)
 830         {
 831                 if ((!$width) || (!$height)) {
 832                         return false;
 833                 }
 834
 835                 if ($width > $max && $height > $max) {
 836                         // very tall image (greater than 16:9)
 837                         // constrain the width - let the height float.
 838
 839                         if ((($height * 9) / 16) > $width) {
 840                                 $dest_width = $max;
 841                                 $dest_height = intval(($height * $max) / $width);
 842                         } elseif ($width > $height) {
 843                                 // else constrain both dimensions
 844                                 $dest_width = $max;
 845                                 $dest_height = intval(($height * $max) / $width);
 846                         } else {
 847                                 $dest_width = intval(($width * $max) / $height);
 848                                 $dest_height = $max;
 849                         }
 850                 } else {
 851                         if ($width > $max) {
 852                                 $dest_width = $max;
 853                                 $dest_height = intval(($height * $max) / $width);
 854                         } else {
 855                                 if ($height > $max) {
 856                                         // very tall image (greater than 16:9)
 857                                         // but width is OK - don't do anything
 858
 859                                         if ((($height * 9) / 16) > $width) {
 860                                                 $dest_width = $width;
 861                                                 $dest_height = $height;
 862                                         } else {
 863                                                 $dest_width = intval(($width * $max) / $height);
 864                                                 $dest_height = $max;
 865                                         }
 866                                 } else {
 867                                         $dest_width = $width;
 868                                         $dest_height = $height;
 869                                 }
 870                         }
 871                 }
 872                 return ["width" => $dest_width, "height" => $dest_height];
 873         }
 874
 875         /**
 876          * @brief This function is used by the fromgplus addon
 877          * @param App     $a         App
 878          * @param integer $uid       user id
 879          * @param string  $imagedata optional, default empty
 880          * @param string  $url       optional, default empty
 881          * @return array
 882          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 883          * @throws \ImagickException
 884          */
 885         public static function storePhoto(App $a, $uid, $imagedata = "", $url = "")
 886         {
 887                 $r = q(
 888                         "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
 889                         WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
 890                         intval($uid)
 891                 );
 892
 893                 if (!DBA::isResult($r)) {
 894                         Logger::log("Can't detect user data for uid ".$uid, Logger::DEBUG);
 895                         return([]);
 896                 }
 897
 898                 $page_owner_nick  = $r[0]['nickname'];
 899
 900                 /// @TODO
 901                 /// $default_cid      = $r[0]['id'];
 902                 /// $community_page   = (($r[0]['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
 903
 904                 if ((strlen($imagedata) == 0) && ($url == "")) {
 905                         Logger::log("No image data and no url provided", Logger::DEBUG);
 906                         return([]);
 907                 } elseif (strlen($imagedata) == 0) {
 908                         Logger::log("Uploading picture from ".$url, Logger::DEBUG);
 909
 910                         $stamp1 = microtime(true);
 911                         $imagedata = @file_get_contents($url);
 912                         $a->saveTimestamp($stamp1, "file");
 913                 }
 914
 915                 $maximagesize = Config::get('system', 'maximagesize');
 916
 917                 if (($maximagesize) && (strlen($imagedata) > $maximagesize)) {
 918                         Logger::log("Image exceeds size limit of ".$maximagesize, Logger::DEBUG);
 919                         return([]);
 920                 }
 921
 922                 $tempfile = tempnam(get_temppath(), "cache");
 923
 924                 $stamp1 = microtime(true);
 925                 file_put_contents($tempfile, $imagedata);
 926                 $a->saveTimestamp($stamp1, "file");
 927
 928                 $data = getimagesize($tempfile);
 929
 930                 if (!isset($data["mime"])) {
 931                         unlink($tempfile);
 932                         Logger::log("File is no picture", Logger::DEBUG);
 933                         return([]);
 934                 }
 935
 936                 $Image = new Image($imagedata, $data["mime"]);
 937
 938                 if (!$Image->isValid()) {
 939                         unlink($tempfile);
 940                         Logger::log("Picture is no valid picture", Logger::DEBUG);
 941                         return([]);
 942                 }
 943
 944                 $Image->orient($tempfile);
 945                 unlink($tempfile);
 946
 947                 $max_length = Config::get('system', 'max_image_length');
 948                 if (! $max_length) {
 949                         $max_length = MAX_IMAGE_LENGTH;
 950                 }
 951
 952                 if ($max_length > 0) {
 953                         $Image->scaleDown($max_length);
 954                 }
 955
 956                 $width = $Image->getWidth();
 957                 $height = $Image->getHeight();
 958
 959                 $hash = Photo::newResource();
 960
 961                 // Pictures are always public by now
 962                 //$defperm = '<'.$default_cid.'>';
 963                 $defperm = "";
 964                 $visitor = 0;
 965
 966                 $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 0, 0, $defperm);
 967
 968                 if (!$r) {
 969                         Logger::log("Picture couldn't be stored", Logger::DEBUG);
 970                         return([]);
 971                 }
 972
 973                 $image = ["page" => System::baseUrl().'/photos/'.$page_owner_nick.'/image/'.$hash,
 974                         "full" => System::baseUrl()."/photo/{$hash}-0.".$Image->getExt()];
 975
 976                 if ($width > 800 || $height > 800) {
 977                         $image["large"] = System::baseUrl()."/photo/{$hash}-0.".$Image->getExt();
 978                 }
 979
 980                 if ($width > 640 || $height > 640) {
 981                         $Image->scaleDown(640);
 982                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 1, 0, $defperm);
 983                         if ($r) {
 984                                 $image["medium"] = System::baseUrl()."/photo/{$hash}-1.".$Image->getExt();
 985                         }
 986                 }
 987
 988                 if ($width > 320 || $height > 320) {
 989                         $Image->scaleDown(320);
 990                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 2, 0, $defperm);
 991                         if ($r) {
 992                                 $image["small"] = System::baseUrl()."/photo/{$hash}-2.".$Image->getExt();
 993                         }
 994                 }
 995
 996                 if ($width > 160 && $height > 160) {
 997                         $x = 0;
 998                         $y = 0;
 999
1000                         $min = $Image->getWidth();
1001                         if ($min > 160) {
1002                                 $x = ($min - 160) / 2;
1003                         }
1004
1005                         if ($Image->getHeight() < $min) {
1006                                 $min = $Image->getHeight();
1007                                 if ($min > 160) {
1008                                         $y = ($min - 160) / 2;
1009                                 }
1010                         }
1011
1012                         $min = 160;
1013                         $Image->crop(160, $x, $y, $min, $min);
1014
1015                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 3, 0, $defperm);
1016                         if ($r) {
1017                                 $image["thumb"] = System::baseUrl()."/photo/{$hash}-3.".$Image->getExt();
1018                         }
1019                 }
1020
1021                 // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
1022                 $image["preview"] = $image["full"];
1023
1024                 // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
1025                 //if (isset($image["thumb"]))
1026                 //  $image["preview"] = $image["thumb"];
1027
1028                 // Unsure, if this should be activated or deactivated
1029                 //if (isset($image["small"]))
1030                 //  $image["preview"] = $image["small"];
1031
1032                 if (isset($image["medium"])) {
1033                         $image["preview"] = $image["medium"];
1034                 }
1035
1036                 return($image);
1037         }
1038 }