src/Object/Photo.php

   1 <?php
   2 /**
   3  * @file src/Object/Photo.php
   4  * @brief This file contains the Photo 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\System;
  12 use Friendica\Database\DBM;
  13 use dba;
  14 use Exception;
  15 use Imagick;
  16 use ImagickPixel;
  17
  18 require_once "include/photos.php";
  19
  20 /**
  21  * Class to handle Photos
  22  */
  23 class Photo
  24 {
  25         private $image;
  26
  27         /*
  28          * Put back gd stuff, not everybody have Imagick
  29          */
  30         private $imagick;
  31         private $width;
  32         private $height;
  33         private $valid;
  34         private $type;
  35         private $types;
  36
  37         /**
  38          * @brief supported mimetypes and corresponding file extensions
  39          * @return array
  40          */
  41         public static function supportedTypes()
  42         {
  43                 if (class_exists('Imagick')) {
  44                         // Imagick::queryFormats won't help us a lot there...
  45                         // At least, not yet, other parts of friendica uses this array
  46                         $t = array(
  47                                 'image/jpeg' => 'jpg',
  48                                 'image/png' => 'png',
  49                                 'image/gif' => 'gif'
  50                         );
  51                 } else {
  52                         $t = array();
  53                         $t['image/jpeg'] ='jpg';
  54                         if (imagetypes() & IMG_PNG) {
  55                                 $t['image/png'] = 'png';
  56                         }
  57                 }
  58
  59                 return $t;
  60         }
  61
  62         /**
  63          * @brief Constructor
  64          * @param object  $data data
  65          * @param boolean $type optional, default null
  66          * @return object
  67          */
  68         public function __construct($data, $type = null)
  69         {
  70                 $this->imagick = class_exists('Imagick');
  71                 $this->types = static::supportedTypes();
  72                 if (!array_key_exists($type, $this->types)) {
  73                         $type='image/jpeg';
  74                 }
  75                 $this->type = $type;
  76
  77                 if ($this->isImagick() && $this->loadData($data)) {
  78                         return true;
  79                 } else {
  80                         // Failed to load with Imagick, fallback
  81                         $this->imagick = false;
  82                 }
  83                 return $this->loadData($data);
  84         }
  85
  86         /**
  87          * @brief Destructor
  88          * @return void
  89          */
  90         public function __destruct()
  91         {
  92                 if ($this->image) {
  93                         if ($this->isImagick()) {
  94                                 $this->image->clear();
  95                                 $this->image->destroy();
  96                                 return;
  97                         }
  98                         if (is_resource($this->image)) {
  99                                 imagedestroy($this->image);
 100                         }
 101                 }
 102         }
 103
 104         /**
 105          * @return boolean
 106          */
 107         public function isImagick()
 108         {
 109                 return $this->imagick;
 110         }
 111
 112         /**
 113          * @brief Maps Mime types to Imagick formats
 114          * @return arr With with image formats (mime type as key)
 115          */
 116         public static function getFormatsMap()
 117         {
 118                 $m = array(
 119                         'image/jpeg' => 'JPG',
 120                         'image/png' => 'PNG',
 121                         'image/gif' => 'GIF'
 122                 );
 123                 return $m;
 124         }
 125
 126         /**
 127          * @param object $data data
 128          * @return boolean
 129          */
 130         private function loadData($data)
 131         {
 132                 if ($this->isImagick()) {
 133                         $this->image = new Imagick();
 134                         try {
 135                                 $this->image->readImageBlob($data);
 136                         } catch (Exception $e) {
 137                                 // Imagick couldn't use the data
 138                                 return false;
 139                         }
 140
 141                         /*
 142                          * Setup the image to the format it will be saved to
 143                          */
 144                         $map = self::getFormatsMap();
 145                         $format = $map[$type];
 146                         $this->image->setFormat($format);
 147
 148                         // Always coalesce, if it is not a multi-frame image it won't hurt anyway
 149                         $this->image = $this->image->coalesceImages();
 150
 151                         /*
 152                          * setup the compression here, so we'll do it only once
 153                          */
 154                         switch ($this->getType()) {
 155                                 case "image/png":
 156                                         $quality = Config::get('system', 'png_quality');
 157                                         if ((! $quality) || ($quality > 9)) {
 158                                                 $quality = PNG_QUALITY;
 159                                         }
 160                                         /*
 161                                          * From http://www.imagemagick.org/script/command-line-options.php#quality:
 162                                          *
 163                                          * 'For the MNG and PNG image formats, the quality value sets
 164                                          * the zlib compression level (quality / 10) and filter-type (quality % 10).
 165                                          * The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
 166                                          * unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
 167                                          */
 168                                         $quality = $quality * 10;
 169                                         $this->image->setCompressionQuality($quality);
 170                                         break;
 171                                 case "image/jpeg":
 172                                         $quality = Config::get('system', 'jpeg_quality');
 173                                         if ((! $quality) || ($quality > 100)) {
 174                                                 $quality = JPEG_QUALITY;
 175                                         }
 176                                         $this->image->setCompressionQuality($quality);
 177                         }
 178
 179                         // The 'width' and 'height' properties are only used by non-Imagick routines.
 180                         $this->width  = $this->image->getImageWidth();
 181                         $this->height = $this->image->getImageHeight();
 182                         $this->valid  = true;
 183
 184                         return true;
 185                 }
 186
 187                 $this->valid = false;
 188                 $this->image = @imagecreatefromstring($data);
 189                 if ($this->image !== false) {
 190                         $this->width  = imagesx($this->image);
 191                         $this->height = imagesy($this->image);
 192                         $this->valid  = true;
 193                         imagealphablending($this->image, false);
 194                         imagesavealpha($this->image, true);
 195
 196                         return true;
 197                 }
 198
 199                 return false;
 200         }
 201
 202         /**
 203          * @return boolean
 204          */
 205         public function isValid()
 206         {
 207                 if ($this->isImagick()) {
 208                         return ($this->image !== false);
 209                 }
 210                 return $this->valid;
 211         }
 212
 213         /**
 214          * @return mixed
 215          */
 216         public function getWidth()
 217         {
 218                 if (!$this->isValid()) {
 219                         return false;
 220                 }
 221
 222                 if ($this->isImagick()) {
 223                         return $this->image->getImageWidth();
 224                 }
 225                 return $this->width;
 226         }
 227
 228         /**
 229          * @return mixed
 230          */
 231         public function getHeight()
 232         {
 233                 if (!$this->isValid()) {
 234                         return false;
 235                 }
 236
 237                 if ($this->isImagick()) {
 238                         return $this->image->getImageHeight();
 239                 }
 240                 return $this->height;
 241         }
 242
 243         /**
 244          * @return mixed
 245          */
 246         public function getImage()
 247         {
 248                 if (!$this->isValid()) {
 249                         return false;
 250                 }
 251
 252                 if ($this->isImagick()) {
 253                         /* Clean it */
 254                         $this->image = $this->image->deconstructImages();
 255                         return $this->image;
 256                 }
 257                 return $this->image;
 258         }
 259
 260         /**
 261          * @return mixed
 262          */
 263         public function getType()
 264         {
 265                 if (!$this->isValid()) {
 266                         return false;
 267                 }
 268
 269                 return $this->type;
 270         }
 271
 272         /**
 273          * @return mixed
 274          */
 275         public function getExt()
 276         {
 277                 if (!$this->isValid()) {
 278                         return false;
 279                 }
 280
 281                 return $this->types[$this->getType()];
 282         }
 283
 284         /**
 285          * @param integer $max max dimension
 286          * @return mixed
 287          */
 288         public function scaleImage($max)
 289         {
 290                 if (!$this->isValid()) {
 291                         return false;
 292                 }
 293
 294                 $width = $this->getWidth();
 295                 $height = $this->getHeight();
 296
 297                 $dest_width = $dest_height = 0;
 298
 299                 if ((! $width)|| (! $height)) {
 300                         return false;
 301                 }
 302
 303                 if ($width > $max && $height > $max) {
 304                         // very tall image (greater than 16:9)
 305                         // constrain the width - let the height float.
 306
 307                         if ((($height * 9) / 16) > $width) {
 308                                 $dest_width = $max;
 309                                 $dest_height = intval(($height * $max) / $width);
 310                         } elseif ($width > $height) {
 311                                 // else constrain both dimensions
 312                                 $dest_width = $max;
 313                                 $dest_height = intval(($height * $max) / $width);
 314                         } else {
 315                                 $dest_width = intval(($width * $max) / $height);
 316                                 $dest_height = $max;
 317                         }
 318                 } else {
 319                         if ($width > $max) {
 320                                 $dest_width = $max;
 321                                 $dest_height = intval(($height * $max) / $width);
 322                         } else {
 323                                 if ($height > $max) {
 324                                         // very tall image (greater than 16:9)
 325                                         // but width is OK - don't do anything
 326
 327                                         if ((($height * 9) / 16) > $width) {
 328                                                 $dest_width = $width;
 329                                                 $dest_height = $height;
 330                                         } else {
 331                                                 $dest_width = intval(($width * $max) / $height);
 332                                                 $dest_height = $max;
 333                                         }
 334                                 } else {
 335                                         $dest_width = $width;
 336                                         $dest_height = $height;
 337                                 }
 338                         }
 339                 }
 340
 341
 342                 if ($this->isImagick()) {
 343                         /*
 344                          * If it is not animated, there will be only one iteration here,
 345                          * so don't bother checking
 346                          */
 347                         // Don't forget to go back to the first frame
 348                         $this->image->setFirstIterator();
 349                         do {
 350                                 // FIXME - implement horizantal bias for scaling as in followin GD functions
 351                                 // to allow very tall images to be constrained only horizontally.
 352
 353                                 $this->image->scaleImage($dest_width, $dest_height);
 354                         } while ($this->image->nextImage());
 355
 356                         // These may not be necessary any more
 357                         $this->width  = $this->image->getImageWidth();
 358                         $this->height = $this->image->getImageHeight();
 359
 360                         return;
 361                 }
 362
 363
 364                 $dest = imagecreatetruecolor($dest_width, $dest_height);
 365                 imagealphablending($dest, false);
 366                 imagesavealpha($dest, true);
 367                 if ($this->type=='image/png') {
 368                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 369                 }
 370                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
 371                 if ($this->image) {
 372                         imagedestroy($this->image);
 373                 }
 374                 $this->image = $dest;
 375                 $this->width  = imagesx($this->image);
 376                 $this->height = imagesy($this->image);
 377         }
 378
 379         /**
 380          * @param integer $degrees degrees to rotate image
 381          * @return mixed
 382          */
 383         public function rotate($degrees)
 384         {
 385                 if (!$this->isValid()) {
 386                         return false;
 387                 }
 388
 389                 if ($this->isImagick()) {
 390                         $this->image->setFirstIterator();
 391                         do {
 392                                 $this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
 393                         } while ($this->image->nextImage());
 394                         return;
 395                 }
 396
 397                 // if script dies at this point check memory_limit setting in php.ini
 398                 $this->image  = imagerotate($this->image, $degrees, 0);
 399                 $this->width  = imagesx($this->image);
 400                 $this->height = imagesy($this->image);
 401         }
 402
 403         /**
 404          * @param boolean $horiz optional, default true
 405          * @param boolean $vert  optional, default false
 406          * @return mixed
 407          */
 408         public function flip($horiz = true, $vert = false)
 409         {
 410                 if (!$this->isValid()) {
 411                         return false;
 412                 }
 413
 414                 if ($this->isImagick()) {
 415                         $this->image->setFirstIterator();
 416                         do {
 417                                 if ($horiz) {
 418                                         $this->image->flipImage();
 419                                 }
 420                                 if ($vert) {
 421                                         $this->image->flopImage();
 422                                 }
 423                         } while ($this->image->nextImage());
 424                         return;
 425                 }
 426
 427                 $w = imagesx($this->image);
 428                 $h = imagesy($this->image);
 429                 $flipped = imagecreate($w, $h);
 430                 if ($horiz) {
 431                         for ($x = 0; $x < $w; $x++) {
 432                                 imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
 433                         }
 434                 }
 435                 if ($vert) {
 436                         for ($y = 0; $y < $h; $y++) {
 437                                 imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
 438                         }
 439                 }
 440                 $this->image = $flipped;
 441         }
 442
 443         /**
 444          * @param string $filename filename
 445          * @return mixed
 446          */
 447         public function orient($filename)
 448         {
 449                 if ($this->isImagick()) {
 450                         // based off comment on http://php.net/manual/en/imagick.getimageorientation.php
 451                         $orientation = $this->image->getImageOrientation();
 452                         switch ($orientation) {
 453                                 case Imagick::ORIENTATION_BOTTOMRIGHT:
 454                                         $this->image->rotateimage("#000", 180);
 455                                         break;
 456                                 case Imagick::ORIENTATION_RIGHTTOP:
 457                                         $this->image->rotateimage("#000", 90);
 458                                         break;
 459                                 case Imagick::ORIENTATION_LEFTBOTTOM:
 460                                         $this->image->rotateimage("#000", -90);
 461                                         break;
 462                         }
 463
 464                         $this->image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
 465                         return true;
 466                 }
 467                 // based off comment on http://php.net/manual/en/function.imagerotate.php
 468
 469                 if (!$this->isValid()) {
 470                         return false;
 471                 }
 472
 473                 if ((!function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg')) {
 474                         return;
 475                 }
 476
 477                 $exif = @exif_read_data($filename, null, true);
 478                 if (!$exif) {
 479                         return;
 480                 }
 481
 482                 $ort = $exif['IFD0']['Orientation'];
 483
 484                 switch ($ort) {
 485                         case 1: // nothing
 486                                 break;
 487
 488                         case 2: // horizontal flip
 489                                 $this->flip();
 490                                 break;
 491
 492                         case 3: // 180 rotate left
 493                                 $this->rotate(180);
 494                                 break;
 495
 496                         case 4: // vertical flip
 497                                 $this->flip(false, true);
 498                                 break;
 499
 500                         case 5: // vertical flip + 90 rotate right
 501                                 $this->flip(false, true);
 502                                 $this->rotate(-90);
 503                                 break;
 504
 505                         case 6: // 90 rotate right
 506                                 $this->rotate(-90);
 507                                 break;
 508
 509                         case 7: // horizontal flip + 90 rotate right
 510                                 $this->flip();
 511                                 $this->rotate(-90);
 512                                 break;
 513
 514                         case 8: // 90 rotate left
 515                                 $this->rotate(90);
 516                                 break;
 517                 }
 518
 519                 //      logger('exif: ' . print_r($exif,true));
 520                 return $exif;
 521         }
 522
 523         /**
 524          * @param integer $min minimum dimension
 525          * @return mixed
 526          */
 527         public function scaleImageUp($min)
 528         {
 529                 if (!$this->isValid()) {
 530                         return false;
 531                 }
 532
 533                 $width = $this->getWidth();
 534                 $height = $this->getHeight();
 535
 536                 $dest_width = $dest_height = 0;
 537
 538                 if ((!$width)|| (!$height)) {
 539                         return false;
 540                 }
 541
 542                 if ($width < $min && $height < $min) {
 543                         if ($width > $height) {
 544                                 $dest_width = $min;
 545                                 $dest_height = intval(($height * $min) / $width);
 546                         } else {
 547                                 $dest_width = intval(($width * $min) / $height);
 548                                 $dest_height = $min;
 549                         }
 550                 } else {
 551                         if ($width < $min) {
 552                                 $dest_width = $min;
 553                                 $dest_height = intval(($height * $min) / $width);
 554                         } else {
 555                                 if ($height < $min) {
 556                                         $dest_width = intval(($width * $min) / $height);
 557                                         $dest_height = $min;
 558                                 } else {
 559                                         $dest_width = $width;
 560                                         $dest_height = $height;
 561                                 }
 562                         }
 563                 }
 564
 565                 if ($this->isImagick()) {
 566                         return $this->scaleImage($dest_width, $dest_height);
 567                 }
 568
 569                 $dest = imagecreatetruecolor($dest_width, $dest_height);
 570                 imagealphablending($dest, false);
 571                 imagesavealpha($dest, true);
 572                 if ($this->type=='image/png') {
 573                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 574                 }
 575                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
 576                 if ($this->image) {
 577                         imagedestroy($this->image);
 578                 }
 579                 $this->image = $dest;
 580                 $this->width  = imagesx($this->image);
 581                 $this->height = imagesy($this->image);
 582         }
 583
 584         /**
 585          * @param integer $dim dimension
 586          * @return mixed
 587          */
 588         public function scaleImageSquare($dim)
 589         {
 590                 if (!$this->isValid()) {
 591                         return false;
 592                 }
 593
 594                 if ($this->isImagick()) {
 595                         $this->image->setFirstIterator();
 596                         do {
 597                                 $this->image->scaleImage($dim, $dim);
 598                         } while ($this->image->nextImage());
 599                         return;
 600                 }
 601
 602                 $dest = imagecreatetruecolor($dim, $dim);
 603                 imagealphablending($dest, false);
 604                 imagesavealpha($dest, true);
 605                 if ($this->type=='image/png') {
 606                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 607                 }
 608                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dim, $dim, $this->width, $this->height);
 609                 if ($this->image) {
 610                         imagedestroy($this->image);
 611                 }
 612                 $this->image = $dest;
 613                 $this->width  = imagesx($this->image);
 614                 $this->height = imagesy($this->image);
 615         }
 616
 617         /**
 618          * @param integer $max maximum
 619          * @param integer $x   x coordinate
 620          * @param integer $y   y coordinate
 621          * @param integer $w   width
 622          * @param integer $h   height
 623          * @return mixed
 624          */
 625         public function cropImage($max, $x, $y, $w, $h)
 626         {
 627                 if (!$this->isValid()) {
 628                         return false;
 629                 }
 630
 631                 if ($this->isImagick()) {
 632                         $this->image->setFirstIterator();
 633                         do {
 634                                 $this->image->cropImage($w, $h, $x, $y);
 635                                 /*
 636                                  * We need to remove the canva,
 637                                  * or the image is not resized to the crop:
 638                                  * http://php.net/manual/en/imagick.cropimage.php#97232
 639                                  */
 640                                 $this->image->setImagePage(0, 0, 0, 0);
 641                         } while ($this->image->nextImage());
 642                         return $this->scaleImage($max);
 643                 }
 644
 645                 $dest = imagecreatetruecolor($max, $max);
 646                 imagealphablending($dest, false);
 647                 imagesavealpha($dest, true);
 648                 if ($this->type=='image/png') {
 649                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 650                 }
 651                 imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
 652                 if ($this->image) {
 653                         imagedestroy($this->image);
 654                 }
 655                 $this->image = $dest;
 656                 $this->width  = imagesx($this->image);
 657                 $this->height = imagesy($this->image);
 658         }
 659
 660         /**
 661          * @param string $path file path
 662          * @return mixed
 663          */
 664         public function saveImage($path)
 665         {
 666                 if (!$this->isValid()) {
 667                         return false;
 668                 }
 669
 670                 $string = $this->imageString();
 671
 672                 $a = get_app();
 673
 674                 $stamp1 = microtime(true);
 675                 file_put_contents($path, $string);
 676                 $a->save_timestamp($stamp1, "file");
 677         }
 678
 679         /**
 680          * @return mixed
 681          */
 682         public function imageString()
 683         {
 684                 if (!$this->isValid()) {
 685                         return false;
 686                 }
 687
 688                 if ($this->isImagick()) {
 689                         /* Clean it */
 690                         $this->image = $this->image->deconstructImages();
 691                         $string = $this->image->getImagesBlob();
 692                         return $string;
 693                 }
 694
 695                 $quality = false;
 696
 697                 ob_start();
 698
 699                 // Enable interlacing
 700                 imageinterlace($this->image, true);
 701
 702                 switch ($this->getType()) {
 703                         case "image/png":
 704                                 $quality = Config::get('system', 'png_quality');
 705                                 if ((!$quality) || ($quality > 9)) {
 706                                         $quality = PNG_QUALITY;
 707                                 }
 708                                 imagepng($this->image, null, $quality);
 709                                 break;
 710                         case "image/jpeg":
 711                                 $quality = Config::get('system', 'jpeg_quality');
 712                                 if ((!$quality) || ($quality > 100)) {
 713                                         $quality = JPEG_QUALITY;
 714                                 }
 715                                 imagejpeg($this->image, null, $quality);
 716                 }
 717                 $string = ob_get_contents();
 718                 ob_end_clean();
 719
 720                 return $string;
 721         }
 722
 723         /**
 724          * @param integer $uid       uid
 725          * @param integer $cid       cid
 726          * @param integer $rid       rid
 727          * @param string  $filename  filename
 728          * @param string  $album     album name
 729          * @param integer $scale     scale
 730          * @param integer $profile   optional, default = 0
 731          * @param string  $allow_cid optional, default = ''
 732          * @param string  $allow_gid optional, default = ''
 733          * @param string  $deny_cid  optional, default = ''
 734          * @param string  $deny_gid  optional, default = ''
 735          * @param string  $desc      optional, default = ''
 736          * @return object
 737          */
 738         public function store($uid, $cid, $rid, $filename, $album, $scale, $profile = 0, $allow_cid = '', $allow_gid = '', $deny_cid = '', $deny_gid = '', $desc = '')
 739         {
 740                 $r = dba::select('photo', array('guid'), array("`resource-id` = ? AND `guid` != ?", $rid, ''), array('limit' => 1));
 741                 if (DBM::is_result($r)) {
 742                         $guid = $r['guid'];
 743                 } else {
 744                         $guid = get_guid();
 745                 }
 746
 747                 $x = dba::select('photo', array('id'), array('resource-id' => $rid, 'uid' => $uid, 'contact-id' => $cid, 'scale' => $scale), array('limit' => 1));
 748
 749                 $fields = array('uid' => $uid, 'contact-id' => $cid, 'guid' => $guid, 'resource-id' => $rid, 'created' => datetime_convert(), 'edited' => datetime_convert(),
 750                                 'filename' => basename($filename), 'type' => $this->getType(), 'album' => $album, 'height' => $this->getHeight(), 'width' => $this->getWidth(),
 751                                 'datasize' => strlen($this->imageString()), 'data' => $this->imageString(), 'scale' => $scale, 'profile' => $profile,
 752                                 'allow_cid' => $allow_cid, 'allow_gid' => $allow_gid, 'deny_cid' => $deny_cid, 'deny_gid' => $deny_gid, 'desc' => $desc);
 753
 754                 if (DBM::is_result($x)) {
 755                         $r = dba::update('photo', $fields, array('id' => $x['id']));
 756                 } else {
 757                         $r = dba::insert('photo', $fields);
 758                 }
 759
 760                 return $r;
 761         }
 762
 763         /**
 764          * Guess image mimetype from filename or from Content-Type header
 765          *
 766          * @param string  $filename Image filename
 767          * @param boolean $fromcurl Check Content-Type header from curl request
 768          *
 769          * @return object
 770          */
 771         public static function guessImageType($filename, $fromcurl = false)
 772         {
 773                 logger('Photo: guessImageType: '.$filename . ($fromcurl?' from curl headers':''), LOGGER_DEBUG);
 774                 $type = null;
 775                 if ($fromcurl) {
 776                         $a = get_app();
 777                         $headers=array();
 778                         $h = explode("\n", $a->get_curl_headers());
 779                         foreach ($h as $l) {
 780                                 list($k,$v) = array_map("trim", explode(":", trim($l), 2));
 781                                 $headers[$k] = $v;
 782                         }
 783                         if (array_key_exists('Content-Type', $headers))
 784                                 $type = $headers['Content-Type'];
 785                 }
 786                 if (is_null($type)) {
 787                         // Guessing from extension? Isn't that... dangerous?
 788                         if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
 789                                 /**
 790                                  * Well, this not much better,
 791                                  * but at least it comes from the data inside the image,
 792                                  * we won't be tricked by a manipulated extension
 793                                  */
 794                                 $image = new Imagick($filename);
 795                                 $type = $image->getImageMimeType();
 796                                 $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
 797                         } else {
 798                                 $ext = pathinfo($filename, PATHINFO_EXTENSION);
 799                                 $types = self::supportedTypes();
 800                                 $type = "image/jpeg";
 801                                 foreach ($types as $m => $e) {
 802                                         if ($ext == $e) {
 803                                                 $type = $m;
 804                                         }
 805                                 }
 806                         }
 807                 }
 808                 logger('Photo: guessImageType: type='.$type, LOGGER_DEBUG);
 809                 return $type;
 810         }
 811
 812         /**
 813          * @param string  $photo         photo
 814          * @param integer $uid           user id
 815          * @param integer $cid           contact id
 816          * @param boolean $quit_on_error optional, default false
 817          * @return array
 818          */
 819         public static function importProfilePhoto($photo, $uid, $cid, $quit_on_error = false)
 820         {
 821                 $r = dba::select(
 822                         'photo',
 823                         array('resource-id'),
 824                         array('uid' => $uid, 'contact-id' => $cid, 'scale' => 4, 'album' => 'Contact Photos'),
 825                         array('limit' => 1)
 826                 );
 827
 828                 if (DBM::is_result($r) && strlen($r['resource-id'])) {
 829                         $hash = $r['resource-id'];
 830                 } else {
 831                         $hash = photo_new_resource();
 832                 }
 833
 834                 $photo_failure = false;
 835
 836                 $filename = basename($photo);
 837                 $img_str = fetch_url($photo, true);
 838
 839                 if ($quit_on_error && ($img_str == "")) {
 840                         return false;
 841                 }
 842
 843                 $type = self::guessImageType($photo, true);
 844                 $img = new Photo($img_str, $type);
 845                 if ($img->isValid()) {
 846                         $img->scaleImageSquare(175);
 847
 848                         $r = $img->store($uid, $cid, $hash, $filename, 'Contact Photos', 4);
 849
 850                         if ($r === false) {
 851                                 $photo_failure = true;
 852                         }
 853
 854                         $img->scaleImage(80);
 855
 856                         $r = $img->store($uid, $cid, $hash, $filename, 'Contact Photos', 5);
 857
 858                         if ($r === false) {
 859                                 $photo_failure = true;
 860                         }
 861
 862                         $img->scaleImage(48);
 863
 864                         $r = $img->store($uid, $cid, $hash, $filename, 'Contact Photos', 6);
 865
 866                         if ($r === false) {
 867                                 $photo_failure = true;
 868                         }
 869
 870                         $suffix = '?ts='.time();
 871
 872                         $photo = System::baseUrl() . '/photo/' . $hash . '-4.' . $img->getExt() . $suffix;
 873                         $thumb = System::baseUrl() . '/photo/' . $hash . '-5.' . $img->getExt() . $suffix;
 874                         $micro = System::baseUrl() . '/photo/' . $hash . '-6.' . $img->getExt() . $suffix;
 875
 876                         // Remove the cached photo
 877                         $a = get_app();
 878                         $basepath = $a->get_basepath();
 879
 880                         if (is_dir($basepath."/photo")) {
 881                                 $filename = $basepath.'/photo/'.$hash.'-4.'.$img->getExt();
 882                                 if (file_exists($filename)) {
 883                                         unlink($filename);
 884                                 }
 885                                 $filename = $basepath.'/photo/'.$hash.'-5.'.$img->getExt();
 886                                 if (file_exists($filename)) {
 887                                         unlink($filename);
 888                                 }
 889                                 $filename = $basepath.'/photo/'.$hash.'-6.'.$img->getExt();
 890                                 if (file_exists($filename)) {
 891                                         unlink($filename);
 892                                 }
 893                         }
 894                 } else {
 895                         $photo_failure = true;
 896                 }
 897
 898                 if ($photo_failure && $quit_on_error) {
 899                         return false;
 900                 }
 901
 902                 if ($photo_failure) {
 903                         $photo = System::baseUrl() . '/images/person-175.jpg';
 904                         $thumb = System::baseUrl() . '/images/person-80.jpg';
 905                         $micro = System::baseUrl() . '/images/person-48.jpg';
 906                 }
 907
 908                 return array($photo, $thumb, $micro);
 909         }
 910
 911         /**
 912          * @param string $url url
 913          * @return object
 914          */
 915         public static function getInfoFromURL($url)
 916         {
 917                 $data = array();
 918
 919                 $data = Cache::get($url);
 920
 921                 if (is_null($data) || !$data || !is_array($data)) {
 922                         $img_str = fetch_url($url, true, $redirects, 4);
 923                         $filesize = strlen($img_str);
 924
 925                         if (function_exists("getimagesizefromstring")) {
 926                                 $data = getimagesizefromstring($img_str);
 927                         } else {
 928                                 $tempfile = tempnam(get_temppath(), "cache");
 929
 930                                 $a = get_app();
 931                                 $stamp1 = microtime(true);
 932                                 file_put_contents($tempfile, $img_str);
 933                                 $a->save_timestamp($stamp1, "file");
 934
 935                                 $data = getimagesize($tempfile);
 936                                 unlink($tempfile);
 937                         }
 938
 939                         if ($data) {
 940                                 $data["size"] = $filesize;
 941                         }
 942
 943                         Cache::set($url, $data);
 944                 }
 945
 946                 return $data;
 947         }
 948
 949         /**
 950          * @param integer $width  width
 951          * @param integer $height height
 952          * @param integer $max    max
 953          * @return array
 954          */
 955         public static function scaleImageTo($width, $height, $max)
 956         {
 957                 $dest_width = $dest_height = 0;
 958
 959                 if ((!$width) || (!$height)) {
 960                         return false;
 961                 }
 962
 963                 if ($width > $max && $height > $max) {
 964                         // very tall image (greater than 16:9)
 965                         // constrain the width - let the height float.
 966
 967                         if ((($height * 9) / 16) > $width) {
 968                                 $dest_width = $max;
 969                                 $dest_height = intval(($height * $max) / $width);
 970                         } elseif ($width > $height) {
 971                                 // else constrain both dimensions
 972                                 $dest_width = $max;
 973                                 $dest_height = intval(($height * $max) / $width);
 974                         } else {
 975                                 $dest_width = intval(($width * $max) / $height);
 976                                 $dest_height = $max;
 977                         }
 978                 } else {
 979                         if ($width > $max) {
 980                                 $dest_width = $max;
 981                                 $dest_height = intval(($height * $max) / $width);
 982                         } else {
 983                                 if ($height > $max) {
 984                                         // very tall image (greater than 16:9)
 985                                         // but width is OK - don't do anything
 986
 987                                         if ((($height * 9) / 16) > $width) {
 988                                                 $dest_width = $width;
 989                                                 $dest_height = $height;
 990                                         } else {
 991                                                 $dest_width = intval(($width * $max) / $height);
 992                                                 $dest_height = $max;
 993                                         }
 994                                 } else {
 995                                         $dest_width = $width;
 996                                         $dest_height = $height;
 997                                 }
 998                         }
 999                 }
1000                 return array("width" => $dest_width, "height" => $dest_height);
1001         }
1002
1003         /**
1004          * @brief This function is used by the fromgplus addon
1005          * @param object  $a         App
1006          * @param integer $uid       user id
1007          * @param string  $imagedata optional, default empty
1008          * @param string  $url       optional, default empty
1009          * @return array
1010          */
1011         public static function storePhoto(App $a, $uid, $imagedata = "", $url = "")
1012         {
1013                 $r = q(
1014                         "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
1015                         WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
1016                         intval($uid)
1017                 );
1018
1019                 if (!DBM::is_result($r)) {
1020                         logger("Can't detect user data for uid ".$uid, LOGGER_DEBUG);
1021                         return(array());
1022                 }
1023
1024                 $page_owner_nick  = $r[0]['nickname'];
1025
1026                 /// @TODO
1027                 /// $default_cid      = $r[0]['id'];
1028                 /// $community_page   = (($r[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
1029
1030                 if ((strlen($imagedata) == 0) && ($url == "")) {
1031                         logger("No image data and no url provided", LOGGER_DEBUG);
1032                         return(array());
1033                 } elseif (strlen($imagedata) == 0) {
1034                         logger("Uploading picture from ".$url, LOGGER_DEBUG);
1035
1036                         $stamp1 = microtime(true);
1037                         $imagedata = @file_get_contents($url);
1038                         $a->save_timestamp($stamp1, "file");
1039                 }
1040
1041                 $maximagesize = Config::get('system', 'maximagesize');
1042
1043                 if (($maximagesize) && (strlen($imagedata) > $maximagesize)) {
1044                         logger("Image exceeds size limit of ".$maximagesize, LOGGER_DEBUG);
1045                         return(array());
1046                 }
1047
1048                 $tempfile = tempnam(get_temppath(), "cache");
1049
1050                 $stamp1 = microtime(true);
1051                 file_put_contents($tempfile, $imagedata);
1052                 $a->save_timestamp($stamp1, "file");
1053
1054                 $data = getimagesize($tempfile);
1055
1056                 if (!isset($data["mime"])) {
1057                         unlink($tempfile);
1058                         logger("File is no picture", LOGGER_DEBUG);
1059                         return(array());
1060                 }
1061
1062                 $ph = new Photo($imagedata, $data["mime"]);
1063
1064                 if (!$ph->isValid()) {
1065                         unlink($tempfile);
1066                         logger("Picture is no valid picture", LOGGER_DEBUG);
1067                         return(array());
1068                 }
1069
1070                 $ph->orient($tempfile);
1071                 unlink($tempfile);
1072
1073                 $max_length = Config::get('system', 'max_image_length');
1074                 if (! $max_length) {
1075                         $max_length = MAX_IMAGE_LENGTH;
1076                 }
1077
1078                 if ($max_length > 0) {
1079                         $ph->scaleImage($max_length);
1080                 }
1081
1082                 $width = $ph->getWidth();
1083                 $height = $ph->getHeight();
1084
1085                 $hash = photo_new_resource();
1086
1087                 $smallest = 0;
1088
1089                 // Pictures are always public by now
1090                 //$defperm = '<'.$default_cid.'>';
1091                 $defperm = "";
1092                 $visitor = 0;
1093
1094                 $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 0, 0, $defperm);
1095
1096                 if (!$r) {
1097                         logger("Picture couldn't be stored", LOGGER_DEBUG);
1098                         return(array());
1099                 }
1100
1101                 $image = array("page" => System::baseUrl().'/photos/'.$page_owner_nick.'/image/'.$hash,
1102                         "full" => System::baseUrl()."/photo/{$hash}-0.".$ph->getExt());
1103
1104                 if ($width > 800 || $height > 800) {
1105                         $image["large"] = System::baseUrl()."/photo/{$hash}-0.".$ph->getExt();
1106                 }
1107
1108                 if ($width > 640 || $height > 640) {
1109                         $ph->scaleImage(640);
1110                         $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 1, 0, $defperm);
1111                         if ($r) {
1112                                 $image["medium"] = System::baseUrl()."/photo/{$hash}-1.".$ph->getExt();
1113                         }
1114                 }
1115
1116                 if ($width > 320 || $height > 320) {
1117                         $ph->scaleImage(320);
1118                         $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 2, 0, $defperm);
1119                         if ($r) {
1120                                 $image["small"] = System::baseUrl()."/photo/{$hash}-2.".$ph->getExt();
1121                         }
1122                 }
1123
1124                 if ($width > 160 && $height > 160) {
1125                         $x = 0;
1126                         $y = 0;
1127
1128                         $min = $ph->getWidth();
1129                         if ($min > 160) {
1130                                 $x = ($min - 160) / 2;
1131                         }
1132
1133                         if ($ph->getHeight() < $min) {
1134                                 $min = $ph->getHeight();
1135                                 if ($min > 160) {
1136                                         $y = ($min - 160) / 2;
1137                                 }
1138                         }
1139
1140                         $min = 160;
1141                         $ph->cropImage(160, $x, $y, $min, $min);
1142
1143                         $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 3, 0, $defperm);
1144                         if ($r) {
1145                                 $image["thumb"] = System::baseUrl()."/photo/{$hash}-3.".$ph->getExt();
1146                         }
1147                 }
1148
1149                 // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
1150                 $image["preview"] = $image["full"];
1151
1152                 // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
1153                 //if (isset($image["thumb"]))
1154                 //  $image["preview"] = $image["thumb"];
1155
1156                 // Unsure, if this should be activated or deactivated
1157                 //if (isset($image["small"]))
1158                 //  $image["preview"] = $image["small"];
1159
1160                 if (isset($image["medium"])) {
1161                         $image["preview"] = $image["medium"];
1162                 }
1163
1164                 return($image);
1165         }
1166 }