<?php /** * Laconica, 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 Laconica * @author Evan Prodromou <evan@controlyourself.ca> * @author Zach Copley <zach@controlyourself.ca> * @copyright 2008-2009 Control Yourself, Inc. * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 * @link http://laconi.ca/ */ if (!defined('LACONICA')) { exit(1); } /** * A wrapper on uploaded files * * Makes it slightly easier to accept an image file from upload. * * @category Image * @package Laconica * @author Evan Prodromou <evan@controlyourself.ca> * @author Zach Copley <zach@controlyourself.ca> * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 * @link http://laconi.ca/ */ class ImageFile { var $id; var $filepath; var $barename; var $type; var $height; var $width; function __construct($id=null, $filepath=null, $type=null, $width=null, $height=null) { $this->id = $id; $this->filepath = $filepath; $info = @getimagesize($this->filepath); $this->type = ($info) ? $info[2]:$type; $this->width = ($info) ? $info[0]:$width; $this->height = ($info) ? $info[1]:$height; } static function fromUpload($param='upload') { switch ($_FILES[$param]['error']) { case UPLOAD_ERR_OK: // success, jump out break; case UPLOAD_ERR_INI_SIZE: case UPLOAD_ERR_FORM_SIZE: throw new Exception(sprintf(_('That file is too big. The maximum file size is %d.'), $this->maxFileSize())); return; case UPLOAD_ERR_PARTIAL: @unlink($_FILES[$param]['tmp_name']); throw new Exception(_('Partial upload.')); return; default: throw new Exception(_('System error uploading file.')); return; } $info = @getimagesize($_FILES[$param]['tmp_name']); if (!$info) { @unlink($_FILES[$param]['tmp_name']); throw new Exception(_('Not an image or corrupt file.')); return; } if ($info[2] !== IMAGETYPE_GIF && $info[2] !== IMAGETYPE_JPEG && $info[2] !== IMAGETYPE_PNG) { @unlink($_FILES[$param]['tmp_name']); throw new Exception(_('Unsupported image file format.')); return; } return new ImageFile(null, $_FILES[$param]['tmp_name']); } function resize($size, $x = 0, $y = 0, $w = null, $h = null) { $w = ($w === null) ? $this->width:$w; $h = ($h === null) ? $this->height:$h; if (!file_exists($this->filepath)) { throw new Exception(_('Lost our file.')); return; } switch ($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; default: throw new Exception(_('Unknown file type')); return; } $image_dest = imagecreatetruecolor($size, $size); if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG) { $transparent_idx = imagecolortransparent($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, $x, $y, $size, $size, $w, $h); $outname = Avatar::filename($this->id, image_type_to_extension($this->type), $size, common_timestamp()); $outpath = Avatar::path($outname); switch ($this->type) { case IMAGETYPE_GIF: imagegif($image_dest, $outpath); break; case IMAGETYPE_JPEG: imagejpeg($image_dest, $outpath); break; case IMAGETYPE_PNG: imagepng($image_dest, $outpath); break; default: throw new Exception(_('Unknown file type')); return; } return $outname; } function unlink() { @unlink($this->filename); } static function maxFileSize() { $value = ImageFile::maxFileSizeInt(); if ($value > 1024 * 1024) { return ($value/(1024*1024)).'Mb'; } else if ($value > 1024) { return ($value/(1024)).'kB'; } else { return $value; } } static function maxFileSizeInt() { return min(ImageFile::strToInt(ini_get('post_max_size')), ImageFile::strToInt(ini_get('upload_max_filesize')), ImageFile::strToInt(ini_get('memory_limit'))); } static function strToInt($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; } }