248 lines
7.5 KiB
PHP
248 lines
7.5 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Abstraction for an image file
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Image
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @author Zach Copley <zach@status.net>
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* @copyright 2008-2009 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET') && !defined('LACONICA')) {
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exit(1);
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}
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/**
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* A wrapper on uploaded files
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*
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* Makes it slightly easier to accept an image file from upload.
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*
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* @category Image
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @author Zach Copley <zach@status.net>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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class ImageFile
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{
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var $id;
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var $filepath;
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var $barename;
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var $type;
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var $height;
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var $width;
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function __construct($id=null, $filepath=null, $type=null, $width=null, $height=null)
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{
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$this->id = $id;
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$this->filepath = $filepath;
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$info = @getimagesize($this->filepath);
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$this->type = ($info) ? $info[2]:$type;
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$this->width = ($info) ? $info[0]:$width;
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$this->height = ($info) ? $info[1]:$height;
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}
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static function fromUpload($param='upload')
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{
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switch ($_FILES[$param]['error']) {
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case UPLOAD_ERR_OK: // success, jump out
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break;
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case UPLOAD_ERR_INI_SIZE:
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case UPLOAD_ERR_FORM_SIZE:
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throw new Exception(sprintf(_('That file is too big. The maximum file size is %s.'),
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ImageFile::maxFileSize()));
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return;
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case UPLOAD_ERR_PARTIAL:
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@unlink($_FILES[$param]['tmp_name']);
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throw new Exception(_('Partial upload.'));
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return;
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case UPLOAD_ERR_NO_FILE:
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// No file; probably just a non-AJAX submission.
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return;
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default:
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common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
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$_FILES[$param]['error']);
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throw new Exception(_('System error uploading file.'));
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return;
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}
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$info = @getimagesize($_FILES[$param]['tmp_name']);
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if (!$info) {
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@unlink($_FILES[$param]['tmp_name']);
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throw new Exception(_('Not an image or corrupt file.'));
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return;
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}
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if ($info[2] !== IMAGETYPE_GIF &&
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$info[2] !== IMAGETYPE_JPEG &&
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$info[2] !== IMAGETYPE_PNG) {
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@unlink($_FILES[$param]['tmp_name']);
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throw new Exception(_('Unsupported image file format.'));
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return;
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}
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return new ImageFile(null, $_FILES[$param]['tmp_name']);
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}
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function resize($size, $x = 0, $y = 0, $w = null, $h = null)
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{
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$w = ($w === null) ? $this->width:$w;
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$h = ($h === null) ? $this->height:$h;
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if (!file_exists($this->filepath)) {
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throw new Exception(_('Lost our file.'));
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return;
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}
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// Don't crop/scale if it isn't necessary
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if ($size === $this->width
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&& $size === $this->height
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&& $x === 0
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&& $y === 0
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&& $w === $this->width
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&& $h === $this->height) {
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$outname = Avatar::filename($this->id,
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image_type_to_extension($this->type),
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$size,
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common_timestamp());
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$outpath = Avatar::path($outname);
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@copy($this->filepath, $outpath);
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return $outname;
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}
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switch ($this->type) {
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case IMAGETYPE_GIF:
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$image_src = imagecreatefromgif($this->filepath);
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break;
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case IMAGETYPE_JPEG:
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$image_src = imagecreatefromjpeg($this->filepath);
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break;
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case IMAGETYPE_PNG:
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$image_src = imagecreatefrompng($this->filepath);
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break;
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default:
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throw new Exception(_('Unknown file type'));
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return;
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}
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$image_dest = imagecreatetruecolor($size, $size);
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if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG) {
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$transparent_idx = imagecolortransparent($image_src);
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if ($transparent_idx >= 0) {
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$transparent_color = imagecolorsforindex($image_src, $transparent_idx);
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$transparent_idx = imagecolorallocate($image_dest, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
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imagefill($image_dest, 0, 0, $transparent_idx);
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imagecolortransparent($image_dest, $transparent_idx);
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} elseif ($this->type == IMAGETYPE_PNG) {
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imagealphablending($image_dest, false);
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$transparent = imagecolorallocatealpha($image_dest, 0, 0, 0, 127);
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imagefill($image_dest, 0, 0, $transparent);
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imagesavealpha($image_dest, true);
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}
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}
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imagecopyresampled($image_dest, $image_src, 0, 0, $x, $y, $size, $size, $w, $h);
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$outname = Avatar::filename($this->id,
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image_type_to_extension($this->type),
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$size,
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common_timestamp());
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$outpath = Avatar::path($outname);
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switch ($this->type) {
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case IMAGETYPE_GIF:
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imagegif($image_dest, $outpath);
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break;
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case IMAGETYPE_JPEG:
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imagejpeg($image_dest, $outpath, 100);
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break;
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case IMAGETYPE_PNG:
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imagepng($image_dest, $outpath);
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break;
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default:
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throw new Exception(_('Unknown file type'));
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return;
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}
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imagedestroy($image_src);
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imagedestroy($image_dest);
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return $outname;
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}
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function unlink()
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{
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@unlink($this->filename);
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}
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static function maxFileSize()
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{
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$value = ImageFile::maxFileSizeInt();
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if ($value > 1024 * 1024) {
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return ($value/(1024*1024)).'Mb';
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} else if ($value > 1024) {
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return ($value/(1024)).'kB';
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} else {
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return $value;
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}
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}
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static function maxFileSizeInt()
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{
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return min(ImageFile::strToInt(ini_get('post_max_size')),
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ImageFile::strToInt(ini_get('upload_max_filesize')),
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ImageFile::strToInt(ini_get('memory_limit')));
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}
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static function strToInt($str)
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{
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$unit = substr($str, -1);
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$num = substr($str, 0, -1);
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switch(strtoupper($unit)){
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case 'G':
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$num *= 1024;
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case 'M':
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$num *= 1024;
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case 'K':
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$num *= 1024;
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}
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return $num;
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}
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} |