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 Exception;
   9 use Friendica\App;
  10 use Friendica\Core\Cache;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\L10n;
  13 use Friendica\Core\Logger;
  14 use Friendica\Core\System;
  15 use Friendica\Database\DBA;
  16 use Friendica\Model\Photo;
  17 use Friendica\Util\Network;
  18 use Imagick;
  19 use ImagickPixel;
  20
  21 /**
  22  * Class to handle images
  23  */
  24 class Image
  25 {
  26         /** @var Imagick|resource */
  27         private $image;
  28
  29         /*
  30          * Put back gd stuff, not everybody have Imagick
  31          */
  32         private $imagick;
  33         private $width;
  34         private $height;
  35         private $valid;
  36         private $type;
  37         private $types;
  38
  39         /**
  40          * @brief supported mimetypes and corresponding file extensions
  41          * @return array
  42          */
  43         public static function supportedTypes()
  44         {
  45                 if (class_exists('Imagick')) {
  46                         // Imagick::queryFormats won't help us a lot there...
  47                         // At least, not yet, other parts of friendica uses this array
  48                         $t = [
  49                                 'image/jpeg' => 'jpg',
  50                                 'image/png' => 'png',
  51                                 'image/gif' => 'gif'
  52                         ];
  53                 } else {
  54                         $t = [];
  55                         $t['image/jpeg'] ='jpg';
  56                         if (imagetypes() & IMG_PNG) {
  57                                 $t['image/png'] = 'png';
  58                         }
  59                 }
  60
  61                 return $t;
  62         }
  63
  64         /**
  65          * @brief Constructor
  66          * @param string  $data
  67          * @param boolean $type optional, default null
  68          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  69          * @throws \ImagickException
  70          */
  71         public function __construct($data, $type = null)
  72         {
  73                 $this->imagick = class_exists('Imagick');
  74                 $this->types = static::supportedTypes();
  75                 if (!array_key_exists($type, $this->types)) {
  76                         $type='image/jpeg';
  77                 }
  78                 $this->type = $type;
  79
  80                 if ($this->isImagick() && $this->loadData($data)) {
  81                         return true;
  82                 } else {
  83                         // Failed to load with Imagick, fallback
  84                         $this->imagick = false;
  85                 }
  86                 return $this->loadData($data);
  87         }
  88
  89         /**
  90          * @brief Destructor
  91          * @return void
  92          */
  93         public function __destruct()
  94         {
  95                 if ($this->image) {
  96                         if ($this->isImagick()) {
  97                                 $this->image->clear();
  98                                 $this->image->destroy();
  99                                 return;
 100                         }
 101                         if (is_resource($this->image)) {
 102                                 imagedestroy($this->image);
 103                         }
 104                 }
 105         }
 106
 107         /**
 108          * @return boolean
 109          */
 110         public function isImagick()
 111         {
 112                 return $this->imagick;
 113         }
 114
 115         /**
 116          * @brief Maps Mime types to Imagick formats
 117          * @return array With with image formats (mime type as key)
 118          */
 119         public static function getFormatsMap()
 120         {
 121                 $m = [
 122                         'image/jpeg' => 'JPG',
 123                         'image/png' => 'PNG',
 124                         'image/gif' => 'GIF'
 125                 ];
 126                 return $m;
 127         }
 128
 129         /**
 130          * @param string $data data
 131          * @return boolean
 132          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 133          * @throws \ImagickException
 134          */
 135         private function loadData($data)
 136         {
 137                 if ($this->isImagick()) {
 138                         $this->image = new Imagick();
 139                         try {
 140                                 $this->image->readImageBlob($data);
 141                         } catch (Exception $e) {
 142                                 // Imagick couldn't use the data
 143                                 return false;
 144                         }
 145
 146                         /*
 147                          * Setup the image to the format it will be saved to
 148                          */
 149                         $map = self::getFormatsMap();
 150                         $format = $map[$this->type];
 151                         $this->image->setFormat($format);
 152
 153                         // Always coalesce, if it is not a multi-frame image it won't hurt anyway
 154                         $this->image = $this->image->coalesceImages();
 155
 156                         /*
 157                          * setup the compression here, so we'll do it only once
 158                          */
 159                         switch ($this->getType()) {
 160                                 case "image/png":
 161                                         $quality = Config::get('system', 'png_quality');
 162                                         if ((! $quality) || ($quality > 9)) {
 163                                                 $quality = PNG_QUALITY;
 164                                         }
 165                                         /*
 166                                          * From http://www.imagemagick.org/script/command-line-options.php#quality:
 167                                          *
 168                                          * 'For the MNG and PNG image formats, the quality value sets
 169                                          * the zlib compression level (quality / 10) and filter-type (quality % 10).
 170                                          * The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
 171                                          * unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
 172                                          */
 173                                         $quality = $quality * 10;
 174                                         $this->image->setCompressionQuality($quality);
 175                                         break;
 176                                 case "image/jpeg":
 177                                         $quality = Config::get('system', 'jpeg_quality');
 178                                         if ((! $quality) || ($quality > 100)) {
 179                                                 $quality = JPEG_QUALITY;
 180                                         }
 181                                         $this->image->setCompressionQuality($quality);
 182                         }
 183
 184                         // The 'width' and 'height' properties are only used by non-Imagick routines.
 185                         $this->width  = $this->image->getImageWidth();
 186                         $this->height = $this->image->getImageHeight();
 187                         $this->valid  = true;
 188
 189                         return true;
 190                 }
 191
 192                 $this->valid = false;
 193                 $this->image = @imagecreatefromstring($data);
 194                 if ($this->image !== false) {
 195                         $this->width  = imagesx($this->image);
 196                         $this->height = imagesy($this->image);
 197                         $this->valid  = true;
 198                         imagealphablending($this->image, false);
 199                         imagesavealpha($this->image, true);
 200
 201                         return true;
 202                 }
 203
 204                 return false;
 205         }
 206
 207         /**
 208          * @return boolean
 209          */
 210         public function isValid()
 211         {
 212                 if ($this->isImagick()) {
 213                         return ($this->image !== false);
 214                 }
 215                 return $this->valid;
 216         }
 217
 218         /**
 219          * @return mixed
 220          */
 221         public function getWidth()
 222         {
 223                 if (!$this->isValid()) {
 224                         return false;
 225                 }
 226
 227                 if ($this->isImagick()) {
 228                         return $this->image->getImageWidth();
 229                 }
 230                 return $this->width;
 231         }
 232
 233         /**
 234          * @return mixed
 235          */
 236         public function getHeight()
 237         {
 238                 if (!$this->isValid()) {
 239                         return false;
 240                 }
 241
 242                 if ($this->isImagick()) {
 243                         return $this->image->getImageHeight();
 244                 }
 245                 return $this->height;
 246         }
 247
 248         /**
 249          * @return mixed
 250          */
 251         public function getImage()
 252         {
 253                 if (!$this->isValid()) {
 254                         return false;
 255                 }
 256
 257                 if ($this->isImagick()) {
 258                         /* Clean it */
 259                         $this->image = $this->image->deconstructImages();
 260                         return $this->image;
 261                 }
 262                 return $this->image;
 263         }
 264
 265         /**
 266          * @return mixed
 267          */
 268         public function getType()
 269         {
 270                 if (!$this->isValid()) {
 271                         return false;
 272                 }
 273
 274                 return $this->type;
 275         }
 276
 277         /**
 278          * @return mixed
 279          */
 280         public function getExt()
 281         {
 282                 if (!$this->isValid()) {
 283                         return false;
 284                 }
 285
 286                 return $this->types[$this->getType()];
 287         }
 288
 289         /**
 290          * @param integer $max max dimension
 291          * @return mixed
 292          */
 293         public function scaleDown($max)
 294         {
 295                 if (!$this->isValid()) {
 296                         return false;
 297                 }
 298
 299                 $width = $this->getWidth();
 300                 $height = $this->getHeight();
 301
 302                 if ((! $width)|| (! $height)) {
 303                         return false;
 304                 }
 305
 306                 if ($width > $max && $height > $max) {
 307                         // very tall image (greater than 16:9)
 308                         // constrain the width - let the height float.
 309
 310                         if ((($height * 9) / 16) > $width) {
 311                                 $dest_width = $max;
 312                                 $dest_height = intval(($height * $max) / $width);
 313                         } elseif ($width > $height) {
 314                                 // else constrain both dimensions
 315                                 $dest_width = $max;
 316                                 $dest_height = intval(($height * $max) / $width);
 317                         } else {
 318                                 $dest_width = intval(($width * $max) / $height);
 319                                 $dest_height = $max;
 320                         }
 321                 } else {
 322                         if ($width > $max) {
 323                                 $dest_width = $max;
 324                                 $dest_height = intval(($height * $max) / $width);
 325                         } else {
 326                                 if ($height > $max) {
 327                                         // very tall image (greater than 16:9)
 328                                         // but width is OK - don't do anything
 329
 330                                         if ((($height * 9) / 16) > $width) {
 331                                                 $dest_width = $width;
 332                                                 $dest_height = $height;
 333                                         } else {
 334                                                 $dest_width = intval(($width * $max) / $height);
 335                                                 $dest_height = $max;
 336                                         }
 337                                 } else {
 338                                         $dest_width = $width;
 339                                         $dest_height = $height;
 340                                 }
 341                         }
 342                 }
 343
 344                 return $this->scale($dest_width, $dest_height);
 345         }
 346
 347         /**
 348          * @param integer $degrees degrees to rotate image
 349          * @return mixed
 350          */
 351         public function rotate($degrees)
 352         {
 353                 if (!$this->isValid()) {
 354                         return false;
 355                 }
 356
 357                 if ($this->isImagick()) {
 358                         $this->image->setFirstIterator();
 359                         do {
 360                                 $this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
 361                         } while ($this->image->nextImage());
 362                         return;
 363                 }
 364
 365                 // if script dies at this point check memory_limit setting in php.ini
 366                 $this->image  = imagerotate($this->image, $degrees, 0);
 367                 $this->width  = imagesx($this->image);
 368                 $this->height = imagesy($this->image);
 369         }
 370
 371         /**
 372          * @param boolean $horiz optional, default true
 373          * @param boolean $vert  optional, default false
 374          * @return mixed
 375          */
 376         public function flip($horiz = true, $vert = false)
 377         {
 378                 if (!$this->isValid()) {
 379                         return false;
 380                 }
 381
 382                 if ($this->isImagick()) {
 383                         $this->image->setFirstIterator();
 384                         do {
 385                                 if ($horiz) {
 386                                         $this->image->flipImage();
 387                                 }
 388                                 if ($vert) {
 389                                         $this->image->flopImage();
 390                                 }
 391                         } while ($this->image->nextImage());
 392                         return;
 393                 }
 394
 395                 $w = imagesx($this->image);
 396                 $h = imagesy($this->image);
 397                 $flipped = imagecreate($w, $h);
 398                 if ($horiz) {
 399                         for ($x = 0; $x < $w; $x++) {
 400                                 imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
 401                         }
 402                 }
 403                 if ($vert) {
 404                         for ($y = 0; $y < $h; $y++) {
 405                                 imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
 406                         }
 407                 }
 408                 $this->image = $flipped;
 409         }
 410
 411         /**
 412          * @param string $filename filename
 413          * @return mixed
 414          */
 415         public function orient($filename)
 416         {
 417                 if ($this->isImagick()) {
 418                         // based off comment on http://php.net/manual/en/imagick.getimageorientation.php
 419                         $orientation = $this->image->getImageOrientation();
 420                         switch ($orientation) {
 421                                 case Imagick::ORIENTATION_BOTTOMRIGHT:
 422                                         $this->image->rotateimage("#000", 180);
 423                                         break;
 424                                 case Imagick::ORIENTATION_RIGHTTOP:
 425                                         $this->image->rotateimage("#000", 90);
 426                                         break;
 427                                 case Imagick::ORIENTATION_LEFTBOTTOM:
 428                                         $this->image->rotateimage("#000", -90);
 429                                         break;
 430                         }
 431
 432                         $this->image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
 433                         return true;
 434                 }
 435                 // based off comment on http://php.net/manual/en/function.imagerotate.php
 436
 437                 if (!$this->isValid()) {
 438                         return false;
 439                 }
 440
 441                 if ((!function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg')) {
 442                         return;
 443                 }
 444
 445                 $exif = @exif_read_data($filename, null, true);
 446                 if (!$exif) {
 447                         return;
 448                 }
 449
 450                 $ort = $exif['IFD0']['Orientation'];
 451
 452                 switch ($ort) {
 453                         case 1: // nothing
 454                                 break;
 455
 456                         case 2: // horizontal flip
 457                                 $this->flip();
 458                                 break;
 459
 460                         case 3: // 180 rotate left
 461                                 $this->rotate(180);
 462                                 break;
 463
 464                         case 4: // vertical flip
 465                                 $this->flip(false, true);
 466                                 break;
 467
 468                         case 5: // vertical flip + 90 rotate right
 469                                 $this->flip(false, true);
 470                                 $this->rotate(-90);
 471                                 break;
 472
 473                         case 6: // 90 rotate right
 474                                 $this->rotate(-90);
 475                                 break;
 476
 477                         case 7: // horizontal flip + 90 rotate right
 478                                 $this->flip();
 479                                 $this->rotate(-90);
 480                                 break;
 481
 482                         case 8: // 90 rotate left
 483                                 $this->rotate(90);
 484                                 break;
 485                 }
 486
 487                 //      Logger::log('exif: ' . print_r($exif,true));
 488                 return $exif;
 489         }
 490
 491         /**
 492          * @param integer $min minimum dimension
 493          * @return mixed
 494          */
 495         public function scaleUp($min)
 496         {
 497                 if (!$this->isValid()) {
 498                         return false;
 499                 }
 500
 501                 $width = $this->getWidth();
 502                 $height = $this->getHeight();
 503
 504                 if ((!$width)|| (!$height)) {
 505                         return false;
 506                 }
 507
 508                 if ($width < $min && $height < $min) {
 509                         if ($width > $height) {
 510                                 $dest_width = $min;
 511                                 $dest_height = intval(($height * $min) / $width);
 512                         } else {
 513                                 $dest_width = intval(($width * $min) / $height);
 514                                 $dest_height = $min;
 515                         }
 516                 } else {
 517                         if ($width < $min) {
 518                                 $dest_width = $min;
 519                                 $dest_height = intval(($height * $min) / $width);
 520                         } else {
 521                                 if ($height < $min) {
 522                                         $dest_width = intval(($width * $min) / $height);
 523                                         $dest_height = $min;
 524                                 } else {
 525                                         $dest_width = $width;
 526                                         $dest_height = $height;
 527                                 }
 528                         }
 529                 }
 530
 531                 return $this->scale($dest_width, $dest_height);
 532         }
 533
 534         /**
 535          * @param integer $dim dimension
 536          * @return mixed
 537          */
 538         public function scaleToSquare($dim)
 539         {
 540                 if (!$this->isValid()) {
 541                         return false;
 542                 }
 543
 544                 return $this->scale($dim, $dim);
 545         }
 546
 547         /**
 548          * @brief Scale image to target dimensions
 549          *
 550          * @param int $dest_width
 551          * @param int $dest_height
 552          * @return boolean
 553          */
 554         private function scale($dest_width, $dest_height)
 555         {
 556                 if (!$this->isValid()) {
 557                         return false;
 558                 }
 559
 560                 if ($this->isImagick()) {
 561                         /*
 562                          * If it is not animated, there will be only one iteration here,
 563                          * so don't bother checking
 564                          */
 565                         // Don't forget to go back to the first frame
 566                         $this->image->setFirstIterator();
 567                         do {
 568                                 // FIXME - implement horizontal bias for scaling as in following GD functions
 569                                 // to allow very tall images to be constrained only horizontally.
 570                                 $this->image->scaleImage($dest_width, $dest_height);
 571                         } while ($this->image->nextImage());
 572
 573                         // These may not be necessary anymore
 574                         $this->width  = $this->image->getImageWidth();
 575                         $this->height = $this->image->getImageHeight();
 576                 } else {
 577                         $dest = imagecreatetruecolor($dest_width, $dest_height);
 578                         imagealphablending($dest, false);
 579                         imagesavealpha($dest, true);
 580
 581                         if ($this->type=='image/png') {
 582                                 imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 583                         }
 584
 585                         imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $this->width, $this->height);
 586
 587                         if ($this->image) {
 588                                 imagedestroy($this->image);
 589                         }
 590
 591                         $this->image = $dest;
 592                         $this->width  = imagesx($this->image);
 593                         $this->height = imagesy($this->image);
 594                 }
 595
 596                 return true;
 597         }
 598
 599         /**
 600          * @param integer $max maximum
 601          * @param integer $x   x coordinate
 602          * @param integer $y   y coordinate
 603          * @param integer $w   width
 604          * @param integer $h   height
 605          * @return mixed
 606          */
 607         public function crop($max, $x, $y, $w, $h)
 608         {
 609                 if (!$this->isValid()) {
 610                         return false;
 611                 }
 612
 613                 if ($this->isImagick()) {
 614                         $this->image->setFirstIterator();
 615                         do {
 616                                 $this->image->cropImage($w, $h, $x, $y);
 617                                 /*
 618                                  * We need to remove the canva,
 619                                  * or the image is not resized to the crop:
 620                                  * http://php.net/manual/en/imagick.cropimage.php#97232
 621                                  */
 622                                 $this->image->setImagePage(0, 0, 0, 0);
 623                         } while ($this->image->nextImage());
 624                         return $this->scaleDown($max);
 625                 }
 626
 627                 $dest = imagecreatetruecolor($max, $max);
 628                 imagealphablending($dest, false);
 629                 imagesavealpha($dest, true);
 630                 if ($this->type=='image/png') {
 631                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 632                 }
 633                 imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
 634                 if ($this->image) {
 635                         imagedestroy($this->image);
 636                 }
 637                 $this->image = $dest;
 638                 $this->width  = imagesx($this->image);
 639                 $this->height = imagesy($this->image);
 640         }
 641
 642         /**
 643          * @param string $path file path
 644          * @return mixed
 645          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 646          */
 647         public function saveToFilePath($path)
 648         {
 649                 if (!$this->isValid()) {
 650                         return false;
 651                 }
 652
 653                 $string = $this->asString();
 654
 655                 $a = \get_app();
 656
 657                 $stamp1 = microtime(true);
 658                 file_put_contents($path, $string);
 659                 $a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
 660         }
 661
 662         /**
 663          * @brief Magic method allowing string casting of an Image object
 664          *
 665          * Ex: $data = $Image->asString();
 666          * can be replaced by
 667          * $data = (string) $Image;
 668          *
 669          * @return string
 670          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 671          */
 672         public function __toString() {
 673                 return $this->asString();
 674         }
 675
 676         /**
 677          * @return mixed
 678          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 679          */
 680         public function asString()
 681         {
 682                 if (!$this->isValid()) {
 683                         return false;
 684                 }
 685
 686                 if ($this->isImagick()) {
 687                         /* Clean it */
 688                         $this->image = $this->image->deconstructImages();
 689                         $string = $this->image->getImagesBlob();
 690                         return $string;
 691                 }
 692
 693                 ob_start();
 694
 695                 // Enable interlacing
 696                 imageinterlace($this->image, true);
 697
 698                 switch ($this->getType()) {
 699                         case "image/png":
 700                                 $quality = Config::get('system', 'png_quality');
 701                                 if ((!$quality) || ($quality > 9)) {
 702                                         $quality = PNG_QUALITY;
 703                                 }
 704                                 imagepng($this->image, null, $quality);
 705                                 break;
 706                         case "image/jpeg":
 707                                 $quality = Config::get('system', 'jpeg_quality');
 708                                 if ((!$quality) || ($quality > 100)) {
 709                                         $quality = JPEG_QUALITY;
 710                                 }
 711                                 imagejpeg($this->image, null, $quality);
 712                 }
 713                 $string = ob_get_contents();
 714                 ob_end_clean();
 715
 716                 return $string;
 717         }
 718
 719         /**
 720          * Guess image mimetype from filename or from Content-Type header
 721          *
 722          * @param string  $filename Image filename
 723          * @param boolean $fromcurl Check Content-Type header from curl request
 724          * @param string  $header   passed headers to take into account
 725          *
 726          * @return object
 727          * @throws \ImagickException
 728          */
 729         public static function guessType($filename, $fromcurl = false, $header = '')
 730         {
 731                 Logger::log('Image: guessType: '.$filename . ($fromcurl?' from curl headers':''), Logger::DEBUG);
 732                 $type = null;
 733                 if ($fromcurl) {
 734                         $headers=[];
 735                         $h = explode("\n", $header);
 736                         foreach ($h as $l) {
 737                                 $data = array_map("trim", explode(":", trim($l), 2));
 738                                 if (count($data) > 1) {
 739                                         list($k,$v) = $data;
 740                                         $headers[$k] = $v;
 741                                 }
 742                         }
 743                         if (array_key_exists('Content-Type', $headers))
 744                                 $type = $headers['Content-Type'];
 745                 }
 746                 if (is_null($type)) {
 747                         // Guessing from extension? Isn't that... dangerous?
 748                         if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
 749                                 /**
 750                                  * Well, this not much better,
 751                                  * but at least it comes from the data inside the image,
 752                                  * we won't be tricked by a manipulated extension
 753                                  */
 754                                 $image = new Imagick($filename);
 755                                 $type = $image->getImageMimeType();
 756                                 $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
 757                         } else {
 758                                 $ext = pathinfo($filename, PATHINFO_EXTENSION);
 759                                 $types = self::supportedTypes();
 760                                 $type = "image/jpeg";
 761                                 foreach ($types as $m => $e) {
 762                                         if ($ext == $e) {
 763                                                 $type = $m;
 764                                         }
 765                                 }
 766                         }
 767                 }
 768                 Logger::log('Image: guessType: type='.$type, Logger::DEBUG);
 769                 return $type;
 770         }
 771
 772         /**
 773          * @param string $url url
 774          * @return object
 775          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 776          */
 777         public static function getInfoFromURL($url)
 778         {
 779                 $data = [];
 780
 781                 if (empty($url)) {
 782                         return $data;
 783                 }
 784
 785                 $data = Cache::get($url);
 786
 787                 if (is_null($data) || !$data || !is_array($data)) {
 788                         $img_str = Network::fetchUrl($url, true, $redirects, 4);
 789
 790                         if (!$img_str) {
 791                                 return false;
 792                         }
 793
 794                         $filesize = strlen($img_str);
 795
 796                         try {
 797                                 if (function_exists("getimagesizefromstring")) {
 798                                         $data = @getimagesizefromstring($img_str);
 799                                 } else {
 800                                         $tempfile = tempnam(get_temppath(), "cache");
 801
 802                                         $a = \get_app();
 803                                         $stamp1 = microtime(true);
 804                                         file_put_contents($tempfile, $img_str);
 805                                         $a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
 806
 807                                         $data = getimagesize($tempfile);
 808                                         unlink($tempfile);
 809                                 }
 810                         } catch (Exception $e) {
 811                                 return false;
 812                         }
 813
 814                         if ($data) {
 815                                 $data["size"] = $filesize;
 816                         }
 817
 818                         Cache::set($url, $data);
 819                 }
 820
 821                 return $data;
 822         }
 823
 824         /**
 825          * @param integer $width  width
 826          * @param integer $height height
 827          * @param integer $max    max
 828          * @return array
 829          */
 830         public static function getScalingDimensions($width, $height, $max)
 831         {
 832                 if ((!$width) || (!$height)) {
 833                         return false;
 834                 }
 835
 836                 if ($width > $max && $height > $max) {
 837                         // very tall image (greater than 16:9)
 838                         // constrain the width - let the height float.
 839
 840                         if ((($height * 9) / 16) > $width) {
 841                                 $dest_width = $max;
 842                                 $dest_height = intval(($height * $max) / $width);
 843                         } elseif ($width > $height) {
 844                                 // else constrain both dimensions
 845                                 $dest_width = $max;
 846                                 $dest_height = intval(($height * $max) / $width);
 847                         } else {
 848                                 $dest_width = intval(($width * $max) / $height);
 849                                 $dest_height = $max;
 850                         }
 851                 } else {
 852                         if ($width > $max) {
 853                                 $dest_width = $max;
 854                                 $dest_height = intval(($height * $max) / $width);
 855                         } else {
 856                                 if ($height > $max) {
 857                                         // very tall image (greater than 16:9)
 858                                         // but width is OK - don't do anything
 859
 860                                         if ((($height * 9) / 16) > $width) {
 861                                                 $dest_width = $width;
 862                                                 $dest_height = $height;
 863                                         } else {
 864                                                 $dest_width = intval(($width * $max) / $height);
 865                                                 $dest_height = $max;
 866                                         }
 867                                 } else {
 868                                         $dest_width = $width;
 869                                         $dest_height = $height;
 870                                 }
 871                         }
 872                 }
 873                 return ["width" => $dest_width, "height" => $dest_height];
 874         }
 875
 876         /**
 877          * @brief This function is used by the fromgplus addon
 878          * @param App     $a         App
 879          * @param integer $uid       user id
 880          * @param string  $imagedata optional, default empty
 881          * @param string  $url       optional, default empty
 882          * @return array
 883          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 884          * @throws \ImagickException
 885          */
 886         public static function storePhoto(App $a, $uid, $imagedata = "", $url = "")
 887         {
 888                 $r = q(
 889                         "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
 890                         WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
 891                         intval($uid)
 892                 );
 893
 894                 if (!DBA::isResult($r)) {
 895                         Logger::log("Can't detect user data for uid ".$uid, Logger::DEBUG);
 896                         return([]);
 897                 }
 898
 899                 $page_owner_nick  = $r[0]['nickname'];
 900
 901                 /// @TODO
 902                 /// $default_cid      = $r[0]['id'];
 903                 /// $community_page   = (($r[0]['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
 904
 905                 if ((strlen($imagedata) == 0) && ($url == "")) {
 906                         Logger::log("No image data and no url provided", Logger::DEBUG);
 907                         return([]);
 908                 } elseif (strlen($imagedata) == 0) {
 909                         Logger::log("Uploading picture from ".$url, Logger::DEBUG);
 910
 911                         $stamp1 = microtime(true);
 912                         $imagedata = @file_get_contents($url);
 913                         $a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
 914                 }
 915
 916                 $maximagesize = Config::get('system', 'maximagesize');
 917
 918                 if (($maximagesize) && (strlen($imagedata) > $maximagesize)) {
 919                         Logger::log("Image exceeds size limit of ".$maximagesize, Logger::DEBUG);
 920                         return([]);
 921                 }
 922
 923                 $tempfile = tempnam(get_temppath(), "cache");
 924
 925                 $stamp1 = microtime(true);
 926                 file_put_contents($tempfile, $imagedata);
 927                 $a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
 928
 929                 $data = getimagesize($tempfile);
 930
 931                 if (!isset($data["mime"])) {
 932                         unlink($tempfile);
 933                         Logger::log("File is no picture", Logger::DEBUG);
 934                         return([]);
 935                 }
 936
 937                 $Image = new Image($imagedata, $data["mime"]);
 938
 939                 if (!$Image->isValid()) {
 940                         unlink($tempfile);
 941                         Logger::log("Picture is no valid picture", Logger::DEBUG);
 942                         return([]);
 943                 }
 944
 945                 $Image->orient($tempfile);
 946                 unlink($tempfile);
 947
 948                 $max_length = Config::get('system', 'max_image_length');
 949                 if (! $max_length) {
 950                         $max_length = MAX_IMAGE_LENGTH;
 951                 }
 952
 953                 if ($max_length > 0) {
 954                         $Image->scaleDown($max_length);
 955                 }
 956
 957                 $width = $Image->getWidth();
 958                 $height = $Image->getHeight();
 959
 960                 $hash = Photo::newResource();
 961
 962                 // Pictures are always public by now
 963                 //$defperm = '<'.$default_cid.'>';
 964                 $defperm = "";
 965                 $visitor = 0;
 966
 967                 $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 0, 0, $defperm);
 968
 969                 if (!$r) {
 970                         Logger::log("Picture couldn't be stored", Logger::DEBUG);
 971                         return([]);
 972                 }
 973
 974                 $image = ["page" => System::baseUrl().'/photos/'.$page_owner_nick.'/image/'.$hash,
 975                         "full" => System::baseUrl()."/photo/{$hash}-0.".$Image->getExt()];
 976
 977                 if ($width > 800 || $height > 800) {
 978                         $image["large"] = System::baseUrl()."/photo/{$hash}-0.".$Image->getExt();
 979                 }
 980
 981                 if ($width > 640 || $height > 640) {
 982                         $Image->scaleDown(640);
 983                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 1, 0, $defperm);
 984                         if ($r) {
 985                                 $image["medium"] = System::baseUrl()."/photo/{$hash}-1.".$Image->getExt();
 986                         }
 987                 }
 988
 989                 if ($width > 320 || $height > 320) {
 990                         $Image->scaleDown(320);
 991                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 2, 0, $defperm);
 992                         if ($r) {
 993                                 $image["small"] = System::baseUrl()."/photo/{$hash}-2.".$Image->getExt();
 994                         }
 995                 }
 996
 997                 if ($width > 160 && $height > 160) {
 998                         $x = 0;
 999                         $y = 0;
1000
1001                         $min = $Image->getWidth();
1002                         if ($min > 160) {
1003                                 $x = ($min - 160) / 2;
1004                         }
1005
1006                         if ($Image->getHeight() < $min) {
1007                                 $min = $Image->getHeight();
1008                                 if ($min > 160) {
1009                                         $y = ($min - 160) / 2;
1010                                 }
1011                         }
1012
1013                         $min = 160;
1014                         $Image->crop(160, $x, $y, $min, $min);
1015
1016                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 3, 0, $defperm);
1017                         if ($r) {
1018                                 $image["thumb"] = System::baseUrl()."/photo/{$hash}-3.".$Image->getExt();
1019                         }
1020                 }
1021
1022                 // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
1023                 $image["preview"] = $image["full"];
1024
1025                 // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
1026                 //if (isset($image["thumb"]))
1027                 //  $image["preview"] = $image["thumb"];
1028
1029                 // Unsure, if this should be activated or deactivated
1030                 //if (isset($image["small"]))
1031                 //  $image["preview"] = $image["small"];
1032
1033                 if (isset($image["medium"])) {
1034                         $image["preview"] = $image["medium"];
1035                 }
1036
1037                 return($image);
1038         }
1039 }