723 lines
		
	
	
		
			27 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			723 lines
		
	
	
		
			27 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
| <?php
 | |
| /**
 | |
|  * StatusNet, the distributed open-source microblogging tool
 | |
|  *
 | |
|  * Abstraction for an image file
 | |
|  *
 | |
|  * PHP version 5
 | |
|  *
 | |
|  * LICENCE: This program is free software: you can redistribute it and/or modify
 | |
|  * it under the terms of the GNU Affero General Public License as published by
 | |
|  * the Free Software Foundation, either version 3 of the License, or
 | |
|  * (at your option) any later version.
 | |
|  *
 | |
|  * This program is distributed in the hope that it will be useful,
 | |
|  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 | |
|  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 | |
|  * GNU Affero General Public License for more details.
 | |
|  *
 | |
|  * You should have received a copy of the GNU Affero General Public License
 | |
|  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 | |
|  *
 | |
|  * @category  Image
 | |
|  * @package   StatusNet
 | |
|  * @author    Evan Prodromou <evan@status.net>
 | |
|  * @author    Zach Copley <zach@status.net>
 | |
|  * @copyright 2008-2009 StatusNet, Inc.
 | |
|  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 | |
|  * @link      http://status.net/
 | |
|  */
 | |
| 
 | |
| if (!defined('GNUSOCIAL')) { exit(1); }
 | |
| 
 | |
| /**
 | |
|  * A wrapper on uploaded files
 | |
|  *
 | |
|  * Makes it slightly easier to accept an image file from upload.
 | |
|  *
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|  * @category Image
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|  * @package  StatusNet
 | |
|  * @author   Evan Prodromou <evan@status.net>
 | |
|  * @author   Zach Copley <zach@status.net>
 | |
|  * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 | |
|  * @link     http://status.net/
 | |
|  */
 | |
| 
 | |
| class ImageFile
 | |
| {
 | |
|     var $id;
 | |
|     var $filepath;
 | |
|     var $filename;
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|     var $type;
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|     var $height;
 | |
|     var $width;
 | |
|     var $rotate=0;  // degrees to rotate for properly oriented image (extrapolated from EXIF etc.)
 | |
|     var $animated = null;  // Animated image? (has more than 1 frame). null means untested
 | |
|     var $mimetype = null;   // The _ImageFile_ mimetype, _not_ the originating File object
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| 
 | |
|     protected $fileRecord = null;
 | |
| 
 | |
|     function __construct($id, $filepath)
 | |
|     {
 | |
|         $this->id = $id;
 | |
|         if (!empty($this->id)) {
 | |
|             $this->fileRecord = new File();
 | |
|             $this->fileRecord->id = $this->id;
 | |
|             if (!$this->fileRecord->find(true)) {
 | |
|                 // If we have set an ID, we need that ID to exist!
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|                 throw new NoResultException($this->fileRecord);
 | |
|             }
 | |
|         }
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| 
 | |
|         // These do not have to be the same as fileRecord->filename for example,
 | |
|         // since we may have generated an image source file from something else!
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|         $this->filepath = $filepath;
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|         $this->filename = basename($filepath);
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| 
 | |
|         $info = @getimagesize($this->filepath);
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| 
 | |
|         if (!(
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|             ($info[2] == IMAGETYPE_GIF && function_exists('imagecreatefromgif')) ||
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|             ($info[2] == IMAGETYPE_JPEG && function_exists('imagecreatefromjpeg')) ||
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|             $info[2] == IMAGETYPE_BMP ||
 | |
|             ($info[2] == IMAGETYPE_WBMP && function_exists('imagecreatefromwbmp')) ||
 | |
|             ($info[2] == IMAGETYPE_XBM && function_exists('imagecreatefromxbm')) ||
 | |
|             ($info[2] == IMAGETYPE_PNG && function_exists('imagecreatefrompng')))) {
 | |
| 
 | |
|             // TRANS: Exception thrown when trying to upload an unsupported image file format.
 | |
|             throw new UnsupportedMediaException(_('Unsupported image format.'), $this->filepath);
 | |
|         }
 | |
| 
 | |
|         $this->width    = $info[0];
 | |
|         $this->height   = $info[1];
 | |
|         $this->type     = $info[2];
 | |
|         $this->mimetype = $info['mime'];
 | |
| 
 | |
|         if ($this->type == IMAGETYPE_JPEG && function_exists('exif_read_data')) {
 | |
|             // Orientation value to rotate thumbnails properly
 | |
|             $exif = exif_read_data($this->filepath);
 | |
|             if (is_array($exif) && isset($exif['Orientation'])) {
 | |
|                 switch ((int)$exif['Orientation']) {
 | |
|                 case 1: // top is top
 | |
|                     $this->rotate = 0;
 | |
|                     break;
 | |
|                 case 3: // top is bottom
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|                     $this->rotate = 180;
 | |
|                     break;
 | |
|                 case 6: // top is right
 | |
|                     $this->rotate = -90;
 | |
|                     break;
 | |
|                 case 8: // top is left
 | |
|                     $this->rotate = 90;
 | |
|                     break;
 | |
|                 }
 | |
|                 // If we ever write this back, Orientation should be set to '1'
 | |
|             }
 | |
|         } elseif ($this->type === IMAGETYPE_GIF) {
 | |
|             $this->animated = $this->isAnimatedGif();
 | |
|         }
 | |
| 
 | |
|         Event::handle('FillImageFileMetadata', array($this));
 | |
|     }
 | |
| 
 | |
|     public static function fromFileObject(File $file)
 | |
|     {
 | |
|         $imgPath = null;
 | |
|         $media = common_get_mime_media($file->mimetype);
 | |
|         if (Event::handle('CreateFileImageThumbnailSource', array($file, &$imgPath, $media))) {
 | |
|             if (empty($file->filename)) {
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|                 throw new UnsupportedMediaException(_('File without filename could not get a thumbnail source.'));
 | |
|             }
 | |
|             switch ($media) {
 | |
|             case 'image':
 | |
|                 $imgPath = $file->getPath();
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|                 break;
 | |
|             default:
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|                 throw new UnsupportedMediaException(_('Unsupported media format.'), $file->getPath());
 | |
|             }
 | |
|         }
 | |
| 
 | |
|         if (!file_exists($imgPath)) {
 | |
|             throw new ServerException(sprintf('Image not available locally: %s', $imgPath));
 | |
|         }
 | |
| 
 | |
|         try {
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|             $image = new ImageFile($file->id, $imgPath);
 | |
|         } catch (UnsupportedMediaException $e) {
 | |
|             // Avoid deleting the original
 | |
|             if ($imgPath != $file->getPath()) {
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|                 unlink($imgPath);
 | |
|             }
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|             throw $e;
 | |
|         }
 | |
|         return $image;
 | |
|     }
 | |
| 
 | |
|     public function getPath()
 | |
|     {
 | |
|         if (!file_exists($this->filepath)) {
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|             throw new FileNotFoundException($this->filepath);
 | |
|         }
 | |
| 
 | |
|         return $this->filepath;
 | |
|     }
 | |
| 
 | |
|     static function fromUpload($param='upload')
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|     {
 | |
|         switch ($_FILES[$param]['error']) {
 | |
|          case UPLOAD_ERR_OK: // success, jump out
 | |
|             break;
 | |
| 
 | |
|          case UPLOAD_ERR_INI_SIZE:
 | |
|          case UPLOAD_ERR_FORM_SIZE:
 | |
|             // TRANS: Exception thrown when too large a file is uploaded.
 | |
|             // TRANS: %s is the maximum file size, for example "500b", "10kB" or "2MB".
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|             throw new Exception(sprintf(_('That file is too big. The maximum file size is %s.'), ImageFile::maxFileSize()));
 | |
| 
 | |
|          case UPLOAD_ERR_PARTIAL:
 | |
|             @unlink($_FILES[$param]['tmp_name']);
 | |
|             // TRANS: Exception thrown when uploading an image and that action could not be completed.
 | |
|             throw new Exception(_('Partial upload.'));
 | |
| 
 | |
|          case UPLOAD_ERR_NO_FILE:
 | |
|             // No file; probably just a non-AJAX submission.
 | |
|          default:
 | |
|             common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " . $_FILES[$param]['error']);
 | |
|             // TRANS: Exception thrown when uploading an image fails for an unknown reason.
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|             throw new Exception(_('System error uploading file.'));
 | |
|         }
 | |
| 
 | |
|         $info = @getimagesize($_FILES[$param]['tmp_name']);
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| 
 | |
|         if (!$info) {
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|             @unlink($_FILES[$param]['tmp_name']);
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|             // TRANS: Exception thrown when uploading a file as image that is not an image or is a corrupt file.
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|             throw new UnsupportedMediaException(_('Not an image or corrupt file.'), '[deleted]');
 | |
|         }
 | |
| 
 | |
|         return new ImageFile(null, $_FILES[$param]['tmp_name']);
 | |
|     }
 | |
| 
 | |
|     /**
 | |
|      * Compat interface for old code generating avatar thumbnails...
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|      * Saves the scaled file directly into the avatar area.
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|      *
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|      * @param int $size target width & height -- must be square
 | |
|      * @param int $x (default 0) upper-left corner to crop from
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|      * @param int $y (default 0) upper-left corner to crop from
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|      * @param int $w (default full) width of image area to crop
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|      * @param int $h (default full) height of image area to crop
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|      * @return string filename
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|      */
 | |
|     function resize($size, $x = 0, $y = 0, $w = null, $h = null)
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|     {
 | |
|         $targetType = $this->preferredType();
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|         $outname = Avatar::filename($this->id,
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|                                     image_type_to_extension($targetType),
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|                                     $size,
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|                                     common_timestamp());
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|         $outpath = Avatar::path($outname);
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|         $this->resizeTo($outpath, array('width'=>$size, 'height'=>$size,
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|                                         'x'=>$x,        'y'=>$y,
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|                                         'w'=>$w,        'h'=>$h));
 | |
|         return $outname;
 | |
|     }
 | |
| 
 | |
|     /**
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|      * Copy the image file to the given destination.
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|      *
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|      * This function may modify the resulting file. Please use the
 | |
|      * returned ImageFile object to read metadata (width, height etc.)
 | |
|      *
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|      * @param string $outpath
 | |
|      * @return ImageFile the image stored at target path
 | |
|      */
 | |
|     function copyTo($outpath)
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|     {
 | |
|         return new ImageFile(null, $this->resizeTo($outpath));
 | |
|     }
 | |
| 
 | |
|     /**
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|      * Create and save a thumbnail image.
 | |
|      *
 | |
|      * @param string $outpath
 | |
|      * @param array $box    width, height, boundary box (x,y,w,h) defaults to full image
 | |
|      * @return string full local filesystem filename
 | |
|      */
 | |
|     function resizeTo($outpath, array $box=array())
 | |
|     {
 | |
|         $box['width'] = isset($box['width']) ? intval($box['width']) : $this->width;
 | |
|         $box['height'] = isset($box['height']) ? intval($box['height']) : $this->height;
 | |
|         $box['x'] = isset($box['x']) ? intval($box['x']) : 0;
 | |
|         $box['y'] = isset($box['y']) ? intval($box['y']) : 0;
 | |
|         $box['w'] = isset($box['w']) ? intval($box['w']) : $this->width;
 | |
|         $box['h'] = isset($box['h']) ? intval($box['h']) : $this->height;
 | |
| 
 | |
|         if (!file_exists($this->filepath)) {
 | |
|             // TRANS: Exception thrown during resize when image has been registered as present, but is no longer there.
 | |
|             throw new Exception(_('Lost our file.'));
 | |
|         }
 | |
| 
 | |
|         // Don't rotate/crop/scale if it isn't necessary
 | |
|         if ($box['width'] === $this->width
 | |
|                 && $box['height'] === $this->height
 | |
|                 && $box['x'] === 0
 | |
|                 && $box['y'] === 0
 | |
|                 && $box['w'] === $this->width
 | |
|                 && $box['h'] === $this->height
 | |
|                 && $this->type == $this->preferredType()) {
 | |
|             if ($this->rotate == 0) {
 | |
|                 // No rotational difference, just copy it as-is
 | |
|                 @copy($this->filepath, $outpath);
 | |
|                 return $outpath;
 | |
|             } elseif (abs($this->rotate) == 90) {
 | |
|                 // Box is rotated 90 degrees in either direction,
 | |
|                 // so we have to redefine x to y and vice versa.
 | |
|                 $tmp = $box['width'];
 | |
|                 $box['width'] = $box['height'];
 | |
|                 $box['height'] = $tmp;
 | |
|                 $tmp = $box['x'];
 | |
|                 $box['x'] = $box['y'];
 | |
|                 $box['y'] = $tmp;
 | |
|                 $tmp = $box['w'];
 | |
|                 $box['w'] = $box['h'];
 | |
|                 $box['h'] = $tmp;
 | |
|             }
 | |
|         }
 | |
| 
 | |
| 
 | |
|         if (Event::handle('StartResizeImageFile', array($this, $outpath, $box))) {
 | |
|             $this->resizeToFile($outpath, $box);
 | |
|         }
 | |
| 
 | |
|         if (!file_exists($outpath)) {
 | |
|             throw new UseFileAsThumbnailException($this->id);
 | |
|         }
 | |
| 
 | |
|         return $outpath;
 | |
|     }
 | |
| 
 | |
|     protected function resizeToFile($outpath, array $box)
 | |
|     {
 | |
|         switch ($this->type) {
 | |
|         case IMAGETYPE_GIF:
 | |
|             $image_src = imagecreatefromgif($this->filepath);
 | |
|             break;
 | |
|         case IMAGETYPE_JPEG:
 | |
|             $image_src = imagecreatefromjpeg($this->filepath);
 | |
|             break;
 | |
|         case IMAGETYPE_PNG:
 | |
|             $image_src = imagecreatefrompng($this->filepath);
 | |
|             break;
 | |
|         case IMAGETYPE_BMP:
 | |
|             $image_src = imagecreatefrombmp($this->filepath);
 | |
|             break;
 | |
|         case IMAGETYPE_WBMP:
 | |
|             $image_src = imagecreatefromwbmp($this->filepath);
 | |
|             break;
 | |
|         case IMAGETYPE_XBM:
 | |
|             $image_src = imagecreatefromxbm($this->filepath);
 | |
|             break;
 | |
|         default:
 | |
|             // TRANS: Exception thrown when trying to resize an unknown file type.
 | |
|             throw new Exception(_('Unknown file type'));
 | |
|         }
 | |
| 
 | |
|         if ($this->rotate != 0) {
 | |
|             $image_src = imagerotate($image_src, $this->rotate, 0);
 | |
|         }
 | |
| 
 | |
|         $image_dest = imagecreatetruecolor($box['width'], $box['height']);
 | |
| 
 | |
|         if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG || $this->type == IMAGETYPE_BMP) {
 | |
| 
 | |
|             $transparent_idx = imagecolortransparent($image_src);
 | |
| 
 | |
|             if ($transparent_idx >= 0) {
 | |
| 
 | |
|                 $transparent_color = imagecolorsforindex($image_src, $transparent_idx);
 | |
|                 $transparent_idx = imagecolorallocate($image_dest, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
 | |
|                 imagefill($image_dest, 0, 0, $transparent_idx);
 | |
|                 imagecolortransparent($image_dest, $transparent_idx);
 | |
| 
 | |
|             } elseif ($this->type == IMAGETYPE_PNG) {
 | |
| 
 | |
|                 imagealphablending($image_dest, false);
 | |
|                 $transparent = imagecolorallocatealpha($image_dest, 0, 0, 0, 127);
 | |
|                 imagefill($image_dest, 0, 0, $transparent);
 | |
|                 imagesavealpha($image_dest, true);
 | |
| 
 | |
|             }
 | |
|         }
 | |
| 
 | |
|         imagecopyresampled($image_dest, $image_src, 0, 0, $box['x'], $box['y'], $box['width'], $box['height'], $box['w'], $box['h']);
 | |
| 
 | |
|         switch ($this->preferredType()) {
 | |
|          case IMAGETYPE_GIF:
 | |
|             imagegif($image_dest, $outpath);
 | |
|             break;
 | |
|          case IMAGETYPE_JPEG:
 | |
|             imagejpeg($image_dest, $outpath, common_config('image', 'jpegquality'));
 | |
|             break;
 | |
|          case IMAGETYPE_PNG:
 | |
|             imagepng($image_dest, $outpath);
 | |
|             break;
 | |
|          default:
 | |
|             // TRANS: Exception thrown when trying resize an unknown file type.
 | |
|             throw new Exception(_('Unknown file type'));
 | |
|         }
 | |
| 
 | |
|         imagedestroy($image_src);
 | |
|         imagedestroy($image_dest);
 | |
|     }
 | |
| 
 | |
| 
 | |
|     /**
 | |
|      * Several obscure file types should be normalized to PNG on resize.
 | |
|      *
 | |
|      * @fixme consider flattening anything not GIF or JPEG to PNG
 | |
|      * @return int
 | |
|      */
 | |
|     function preferredType()
 | |
|     {
 | |
|         if($this->type == IMAGETYPE_BMP) {
 | |
|             //we don't want to save BMP... it's an inefficient, rare, antiquated format
 | |
|             //save png instead
 | |
|             return IMAGETYPE_PNG;
 | |
|         } else if($this->type == IMAGETYPE_WBMP) {
 | |
|             //we don't want to save WBMP... it's a rare format that we can't guarantee clients will support
 | |
|             //save png instead
 | |
|             return IMAGETYPE_PNG;
 | |
|         } else if($this->type == IMAGETYPE_XBM) {
 | |
|             //we don't want to save XBM... it's a rare format that we can't guarantee clients will support
 | |
|             //save png instead
 | |
|             return IMAGETYPE_PNG;
 | |
|         }
 | |
|         return $this->type;
 | |
|     }
 | |
| 
 | |
|     function unlink()
 | |
|     {
 | |
|         @unlink($this->filepath);
 | |
|     }
 | |
| 
 | |
|     static function maxFileSize()
 | |
|     {
 | |
|         $value = ImageFile::maxFileSizeInt();
 | |
| 
 | |
|         if ($value > 1024 * 1024) {
 | |
|             $value = $value/(1024*1024);
 | |
|             // TRANS: Number of megabytes. %d is the number.
 | |
|             return sprintf(_m('%dMB','%dMB',$value),$value);
 | |
|         } else if ($value > 1024) {
 | |
|             $value = $value/1024;
 | |
|             // TRANS: Number of kilobytes. %d is the number.
 | |
|             return sprintf(_m('%dkB','%dkB',$value),$value);
 | |
|         } else {
 | |
|             // TRANS: Number of bytes. %d is the number.
 | |
|             return sprintf(_m('%dB','%dB',$value),$value);
 | |
|         }
 | |
|     }
 | |
| 
 | |
|     static function maxFileSizeInt()
 | |
|     {
 | |
|         return min(ImageFile::strToInt(ini_get('post_max_size')),
 | |
|                    ImageFile::strToInt(ini_get('upload_max_filesize')),
 | |
|                    ImageFile::strToInt(ini_get('memory_limit')));
 | |
|     }
 | |
| 
 | |
|     static function strToInt($str)
 | |
|     {
 | |
|         $unit = substr($str, -1);
 | |
|         $num = substr($str, 0, -1);
 | |
| 
 | |
|         switch(strtoupper($unit)){
 | |
|          case 'G':
 | |
|             $num *= 1024;
 | |
|          case 'M':
 | |
|             $num *= 1024;
 | |
|          case 'K':
 | |
|             $num *= 1024;
 | |
|         }
 | |
| 
 | |
|         return $num;
 | |
|     }
 | |
| 
 | |
|     public function scaleToFit($maxWidth=null, $maxHeight=null, $crop=null)
 | |
|     {
 | |
|         return self::getScalingValues($this->width, $this->height,
 | |
|                                         $maxWidth, $maxHeight, $crop, $this->rotate);
 | |
|     }
 | |
| 
 | |
|     /*
 | |
|      * Gets scaling values for images of various types. Cropping can be enabled.
 | |
|      *
 | |
|      * Values will scale _up_ to fit max values if cropping is enabled!
 | |
|      * With cropping disabled, the max value of each axis will be respected.
 | |
|      *
 | |
|      * @param $width    int Original width
 | |
|      * @param $height   int Original height
 | |
|      * @param $maxW     int Resulting max width
 | |
|      * @param $maxH     int Resulting max height
 | |
|      * @param $crop     int Crop to the size (not preserving aspect ratio)
 | |
|      */
 | |
|     public static function getScalingValues($width, $height,
 | |
|                                         $maxW=null, $maxH=null,
 | |
|                                         $crop=null, $rotate=0)
 | |
|     {
 | |
|         $maxW = $maxW ?: common_config('thumbnail', 'width');
 | |
|         $maxH = $maxH ?: common_config('thumbnail', 'height');
 | |
|   
 | |
|         if ($maxW < 1 || ($maxH !== null && $maxH < 1)) {
 | |
|             throw new ServerException('Bad parameters for ImageFile::getScalingValues');
 | |
|         } elseif ($maxH === null) {
 | |
|             // if maxH is null, we set maxH to equal maxW and enable crop
 | |
|             $maxH = $maxW;
 | |
|             $crop = true;
 | |
|         }
 | |
| 
 | |
|         // Because GD doesn't understand EXIF orientation etc.
 | |
|         if (abs($rotate) == 90) {
 | |
|             $tmp = $width;
 | |
|             $width = $height;
 | |
|             $height = $tmp;
 | |
|         }
 | |
|   
 | |
|         // Cropping data (for original image size). Default values, 0 and null,
 | |
|         // imply no cropping and with preserved aspect ratio (per axis).
 | |
|         $cx = 0;    // crop x
 | |
|         $cy = 0;    // crop y
 | |
|         $cw = null; // crop area width
 | |
|         $ch = null; // crop area height
 | |
|   
 | |
|         if ($crop) {
 | |
|             $s_ar = $width / $height;
 | |
|             $t_ar = $maxW / $maxH;
 | |
| 
 | |
|             $rw = $maxW;
 | |
|             $rh = $maxH;
 | |
| 
 | |
|             // Source aspect ratio differs from target, recalculate crop points!
 | |
|             if ($s_ar > $t_ar) {
 | |
|                 $cx = floor($width / 2 - $height * $t_ar / 2);
 | |
|                 $cw = ceil($height * $t_ar);
 | |
|             } elseif ($s_ar < $t_ar) {
 | |
|                 $cy = floor($height / 2 - $width / $t_ar / 2);
 | |
|                 $ch = ceil($width / $t_ar);
 | |
|             }
 | |
|         } else {
 | |
|             $rw = $maxW;
 | |
|             $rh = ceil($height * $rw / $width);
 | |
| 
 | |
|             // Scaling caused too large height, decrease to max accepted value
 | |
|             if ($rh > $maxH) {
 | |
|                 $rh = $maxH;
 | |
|                 $rw = ceil($width * $rh / $height);
 | |
|             }
 | |
|         }
 | |
|         return array(intval($rw), intval($rh),
 | |
|                     intval($cx), intval($cy),
 | |
|                     is_null($cw) ? $width : intval($cw),
 | |
|                     is_null($ch) ? $height : intval($ch));
 | |
|     }
 | |
| 
 | |
|     /**
 | |
|      * Animated GIF test, courtesy of frank at huddler dot com et al:
 | |
|      * http://php.net/manual/en/function.imagecreatefromgif.php#104473
 | |
|      * Modified so avoid landing inside of a header (and thus not matching our regexp).
 | |
|      */
 | |
|     protected function isAnimatedGif()
 | |
|     {
 | |
|         if (!($fh = @fopen($this->filepath, 'rb'))) {
 | |
|             return false;
 | |
|         }
 | |
| 
 | |
|         $count = 0;
 | |
|         //an animated gif contains multiple "frames", with each frame having a
 | |
|         //header made up of:
 | |
|         // * a static 4-byte sequence (\x00\x21\xF9\x04)
 | |
|         // * 4 variable bytes
 | |
|         // * a static 2-byte sequence (\x00\x2C)
 | |
|         // In total the header is maximum 10 bytes.
 | |
| 
 | |
|         // We read through the file til we reach the end of the file, or we've found
 | |
|         // at least 2 frame headers
 | |
|         while(!feof($fh) && $count < 2) {
 | |
|             $chunk = fread($fh, 1024 * 100); //read 100kb at a time
 | |
|             $count += preg_match_all('#\x00\x21\xF9\x04.{4}\x00\x2C#s', $chunk, $matches);
 | |
|             // rewind in case we ended up in the middle of the header, but avoid
 | |
|             // infinite loop (i.e. don't rewind if we're already in the end).
 | |
|             if (!feof($fh) && ftell($fh) >= 9) {
 | |
|                 fseek($fh, -9, SEEK_CUR);
 | |
|             }
 | |
|         }
 | |
| 
 | |
|         fclose($fh);
 | |
|         return $count > 1;
 | |
|     }
 | |
| 
 | |
|     public function getFileThumbnail($width, $height, $crop)
 | |
|     {
 | |
|         if (!$this->fileRecord instanceof File) {
 | |
|             throw new ServerException('No File object attached to this ImageFile object.');
 | |
|         }
 | |
| 
 | |
|         if ($width === null) {
 | |
|             $width = common_config('thumbnail', 'width');
 | |
|             $height = common_config('thumbnail', 'height');
 | |
|             $crop = common_config('thumbnail', 'crop');
 | |
|         }
 | |
| 
 | |
|         if ($height === null) {
 | |
|             $height = $width;
 | |
|             $crop = true;
 | |
|         }
 | |
| 
 | |
|         // Get proper aspect ratio width and height before lookup
 | |
|         // We have to do it through an ImageFile object because of orientation etc.
 | |
|         // Only other solution would've been to rotate + rewrite uploaded files
 | |
|         // which we don't want to do because we like original, untouched data!
 | |
|         list($width, $height, $x, $y, $w, $h) = $this->scaleToFit($width, $height, $crop);
 | |
| 
 | |
|         $thumb = File_thumbnail::pkeyGet(array(
 | |
|                                             'file_id'=> $this->fileRecord->id,
 | |
|                                             'width'  => $width,
 | |
|                                             'height' => $height,
 | |
|                                         ));
 | |
|         if ($thumb instanceof File_thumbnail) {
 | |
|             return $thumb;
 | |
|         }
 | |
| 
 | |
|         $filename = $this->fileRecord->filehash ?: $this->filename;    // Remote files don't have $this->filehash
 | |
|         $extension = File::guessMimeExtension($this->mimetype);
 | |
|         $outname = "thumb-{$this->fileRecord->id}-{$width}x{$height}-{$filename}." . $extension;
 | |
|         $outpath = File_thumbnail::path($outname);
 | |
| 
 | |
|         // The boundary box for our resizing
 | |
|         $box = array('width'=>$width, 'height'=>$height,
 | |
|                      'x'=>$x,         'y'=>$y,
 | |
|                      'w'=>$w,         'h'=>$h);
 | |
| 
 | |
|         // Doublecheck that parameters are sane and integers.
 | |
|         if ($box['width'] < 1 || $box['width'] > common_config('thumbnail', 'maxsize')
 | |
|                 || $box['height'] < 1 || $box['height'] > common_config('thumbnail', 'maxsize')
 | |
|                 || $box['w'] < 1 || $box['x'] >= $this->width
 | |
|                 || $box['h'] < 1 || $box['y'] >= $this->height) {
 | |
|             // Fail on bad width parameter. If this occurs, it's due to algorithm in ImageFile->scaleToFit
 | |
|             common_debug("Boundary box parameters for resize of {$this->filepath} : ".var_export($box,true));
 | |
|             throw new ServerException('Bad thumbnail size parameters.');
 | |
|         }
 | |
| 
 | |
|         common_debug(sprintf('Generating a thumbnail of File id==%u of size %ux%u', $this->fileRecord->id, $width, $height));
 | |
| 
 | |
|         // Perform resize and store into file
 | |
|         $this->resizeTo($outpath, $box);
 | |
| 
 | |
|         // Avoid deleting the original
 | |
|         if ($this->getPath() != File_thumbnail::path($this->filename)) {
 | |
|             $this->unlink();
 | |
|         }
 | |
|         return File_thumbnail::saveThumbnail($this->fileRecord->id,
 | |
|                                       File_thumbnail::url($outname),
 | |
|                                       $width, $height,
 | |
|                                       $outname);
 | |
|     }
 | |
| }
 | |
| 
 | |
| //PHP doesn't (as of 2/24/2010) have an imagecreatefrombmp so conditionally define one
 | |
| if(!function_exists('imagecreatefrombmp')){
 | |
|     //taken shamelessly from http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214
 | |
|     function imagecreatefrombmp($p_sFile)
 | |
|     {
 | |
|         //    Load the image into a string
 | |
|         $file    =    fopen($p_sFile,"rb");
 | |
|         $read    =    fread($file,10);
 | |
|         while(!feof($file)&&($read<>""))
 | |
|             $read    .=    fread($file,1024);
 | |
| 
 | |
|         $temp    =    unpack("H*",$read);
 | |
|         $hex    =    $temp[1];
 | |
|         $header    =    substr($hex,0,108);
 | |
| 
 | |
|         //    Process the header
 | |
|         //    Structure: http://www.fastgraph.com/help/bmp_header_format.html
 | |
|         if (substr($header,0,4)=="424d")
 | |
|         {
 | |
|             //    Cut it in parts of 2 bytes
 | |
|             $header_parts    =    str_split($header,2);
 | |
| 
 | |
|             //    Get the width        4 bytes
 | |
|             $width            =    hexdec($header_parts[19].$header_parts[18]);
 | |
| 
 | |
|             //    Get the height        4 bytes
 | |
|             $height            =    hexdec($header_parts[23].$header_parts[22]);
 | |
| 
 | |
|             //    Unset the header params
 | |
|             unset($header_parts);
 | |
|         }
 | |
| 
 | |
|         //    Define starting X and Y
 | |
|         $x                =    0;
 | |
|         $y                =    1;
 | |
| 
 | |
|         //    Create newimage
 | |
|         $image            =    imagecreatetruecolor($width,$height);
 | |
| 
 | |
|         //    Grab the body from the image
 | |
|         $body            =    substr($hex,108);
 | |
| 
 | |
|         //    Calculate if padding at the end-line is needed
 | |
|         //    Divided by two to keep overview.
 | |
|         //    1 byte = 2 HEX-chars
 | |
|         $body_size        =    (strlen($body)/2);
 | |
|         $header_size    =    ($width*$height);
 | |
| 
 | |
|         //    Use end-line padding? Only when needed
 | |
|         $usePadding        =    ($body_size>($header_size*3)+4);
 | |
| 
 | |
|         //    Using a for-loop with index-calculation instaid of str_split to avoid large memory consumption
 | |
|         //    Calculate the next DWORD-position in the body
 | |
|         for ($i=0;$i<$body_size;$i+=3)
 | |
|         {
 | |
|             //    Calculate line-ending and padding
 | |
|             if ($x>=$width)
 | |
|             {
 | |
|                 //    If padding needed, ignore image-padding
 | |
|                 //    Shift i to the ending of the current 32-bit-block
 | |
|                 if ($usePadding)
 | |
|                     $i    +=    $width%4;
 | |
| 
 | |
|                 //    Reset horizontal position
 | |
|                 $x    =    0;
 | |
| 
 | |
|                 //    Raise the height-position (bottom-up)
 | |
|                 $y++;
 | |
| 
 | |
|                 //    Reached the image-height? Break the for-loop
 | |
|                 if ($y>$height)
 | |
|                     break;
 | |
|             }
 | |
| 
 | |
|             //    Calculation of the RGB-pixel (defined as BGR in image-data)
 | |
|             //    Define $i_pos as absolute position in the body
 | |
|             $i_pos    =    $i*2;
 | |
|             $r        =    hexdec($body[$i_pos+4].$body[$i_pos+5]);
 | |
|             $g        =    hexdec($body[$i_pos+2].$body[$i_pos+3]);
 | |
|             $b        =    hexdec($body[$i_pos].$body[$i_pos+1]);
 | |
| 
 | |
|             //    Calculate and draw the pixel
 | |
|             $color    =    imagecolorallocate($image,$r,$g,$b);
 | |
|             imagesetpixel($image,$x,$height-$y,$color);
 | |
| 
 | |
|             //    Raise the horizontal position
 | |
|             $x++;
 | |
|         }
 | |
| 
 | |
|         //    Unset the body / free the memory
 | |
|         unset($body);
 | |
| 
 | |
|         //    Return image-object
 | |
|         return $image;
 | |
|     }
 | |
| }   // if(!function_exists('imagecreatefrombmp'))
 |