3 * StatusNet, the distributed open-source microblogging tool
5 * Abstraction for an image file
9 * LICENCE: This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Affero General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Affero General Public License for more details.
19 * You should have received a copy of the GNU Affero General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author Evan Prodromou <evan@status.net>
25 * @author Zach Copley <zach@status.net>
26 * @copyright 2008-2009 StatusNet, Inc.
27 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
28 * @link http://status.net/
31 if (!defined('STATUSNET') && !defined('LACONICA')) {
36 * A wrapper on uploaded files
38 * Makes it slightly easier to accept an image file from upload.
42 * @author Evan Prodromou <evan@status.net>
43 * @author Zach Copley <zach@status.net>
44 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
45 * @link http://status.net/
57 function __construct($id=null, $filepath=null, $type=null, $width=null, $height=null)
60 $this->filepath = $filepath;
62 $info = @getimagesize($this->filepath);
63 $this->type = ($info) ? $info[2]:$type;
64 $this->width = ($info) ? $info[0]:$width;
65 $this->height = ($info) ? $info[1]:$height;
68 static function fromUpload($param='upload')
70 switch ($_FILES[$param]['error']) {
71 case UPLOAD_ERR_OK: // success, jump out
73 case UPLOAD_ERR_INI_SIZE:
74 case UPLOAD_ERR_FORM_SIZE:
75 throw new Exception(sprintf(_('That file is too big. The maximum file size is %s.'),
76 ImageFile::maxFileSize()));
78 case UPLOAD_ERR_PARTIAL:
79 @unlink($_FILES[$param]['tmp_name']);
80 throw new Exception(_('Partial upload.'));
82 case UPLOAD_ERR_NO_FILE:
83 // No file; probably just a non-AJAX submission.
86 common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
87 $_FILES[$param]['error']);
88 throw new Exception(_('System error uploading file.'));
92 $info = @getimagesize($_FILES[$param]['tmp_name']);
95 @unlink($_FILES[$param]['tmp_name']);
96 throw new Exception(_('Not an image or corrupt file.'));
100 if ($info[2] !== IMAGETYPE_GIF &&
101 $info[2] !== IMAGETYPE_JPEG &&
102 $info[2] !== IMAGETYPE_PNG) {
104 @unlink($_FILES[$param]['tmp_name']);
105 throw new Exception(_('Unsupported image file format.'));
109 return new ImageFile(null, $_FILES[$param]['tmp_name']);
112 function resize($size, $x = 0, $y = 0, $w = null, $h = null)
114 $w = ($w === null) ? $this->width:$w;
115 $h = ($h === null) ? $this->height:$h;
117 if (!file_exists($this->filepath)) {
118 throw new Exception(_('Lost our file.'));
122 // Don't crop/scale if it isn't necessary
123 if ($size === $this->width
124 && $size === $this->height
127 && $w === $this->width
128 && $h === $this->height) {
130 $outname = Avatar::filename($this->id,
131 image_type_to_extension($this->type),
134 $outpath = Avatar::path($outname);
135 @copy($this->filepath, $outpath);
139 switch ($this->type) {
141 $image_src = imagecreatefromgif($this->filepath);
144 $image_src = imagecreatefromjpeg($this->filepath);
147 $image_src = imagecreatefrompng($this->filepath);
150 throw new Exception(_('Unknown file type'));
154 $image_dest = imagecreatetruecolor($size, $size);
156 if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG) {
158 $transparent_idx = imagecolortransparent($image_src);
160 if ($transparent_idx >= 0) {
162 $transparent_color = imagecolorsforindex($image_src, $transparent_idx);
163 $transparent_idx = imagecolorallocate($image_dest, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
164 imagefill($image_dest, 0, 0, $transparent_idx);
165 imagecolortransparent($image_dest, $transparent_idx);
167 } elseif ($this->type == IMAGETYPE_PNG) {
169 imagealphablending($image_dest, false);
170 $transparent = imagecolorallocatealpha($image_dest, 0, 0, 0, 127);
171 imagefill($image_dest, 0, 0, $transparent);
172 imagesavealpha($image_dest, true);
177 imagecopyresampled($image_dest, $image_src, 0, 0, $x, $y, $size, $size, $w, $h);
179 $outname = Avatar::filename($this->id,
180 image_type_to_extension($this->type),
184 $outpath = Avatar::path($outname);
186 switch ($this->type) {
188 imagegif($image_dest, $outpath);
191 imagejpeg($image_dest, $outpath, 100);
194 imagepng($image_dest, $outpath);
197 throw new Exception(_('Unknown file type'));
201 imagedestroy($image_src);
202 imagedestroy($image_dest);
209 @unlink($this->filename);
212 static function maxFileSize()
214 $value = ImageFile::maxFileSizeInt();
216 if ($value > 1024 * 1024) {
217 return ($value/(1024*1024)).'Mb';
218 } else if ($value > 1024) {
219 return ($value/(1024)).'kB';
225 static function maxFileSizeInt()
227 return min(ImageFile::strToInt(ini_get('post_max_size')),
228 ImageFile::strToInt(ini_get('upload_max_filesize')),
229 ImageFile::strToInt(ini_get('memory_limit')));
232 static function strToInt($str)
234 $unit = substr($str, -1);
235 $num = substr($str, 0, -1);
237 switch(strtoupper($unit)){